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Transformers

9-1

November 2003

Transformers

Vol. 1, Ref. No. [0301]

Contents
Description

Page

General Purpose Transformers
Single-Phase, Types EP, DS-3, 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three-Phase, Types EPT, DT-3, 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three-Phase, Types EPT, DT-3, 50/60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrostatically Shielded Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy Efficient Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NEMA TP-1-1996 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Temperature Rise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy Efficient Harmonic MitigatingTransformers . . . . . . . . . . . . . . . . . . .
K Factor Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Isolation Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mini-Power Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Totally Enclosed Non-Ventilated Transformers . . . . . . . . . . . . . . . . . . . . . . .
Class I, Division 2, Groups C and D Transformers . . . . . . . . . . . . . . . . . . . . .
Open Type Core and Coil Assembly Transformers. . . . . . . . . . . . . . . . . . . . .
Filtered Noise Isolation Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Sound Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Marine Duty Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buck-Boost Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autotransformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Industrial Control Transformers
Type MTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type MTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type MTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type MTK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CE Marked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type AP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Purpose and Industrial Control Transformers
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Catalog Numbering System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Price Modifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary of Transformer Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-2
9-8
9-19
9-26
9-31
9-33
9-36
9-38
9-41
9-50
9-57
9-59
9-61
9-63
9-65
9-67
9-70
9-72
9-88
9-89
9-94
9-96
9-105
9-110
9-118
9-120
9-122
9-136
9-138
9-141
9-142
9-144

Dry-Type Transformer Family

CA08101001E

For more information visit: www.cutler-hammer.eaton.com









9

Transformers
General Purpose Transformers

9-2

November 2003

Single-Phase, Types EP, DS-3, 60 Hz

Single-Phase, Types EP,
DS-3, 60 Hz

Vol. 1, Ref. No. [0302]

Features, Benefits
and Functions
UL
 listed.
60 Hz operation.
■ Short-term overload capability
as required by ANSI.
■ Meet NEMA ST-20 sound levels.
■

■

Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-1. Insulation System Classification

Standards and Certifications

Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

Industry Standards

Type EP 3-25 kVA

9

Product Description

All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Seismically Qualified

Type EP
■
■
■
■
■
■
■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA
 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC rise
standard.
Available in ratings through 37.5 kVA
and 4160 volts primary.

Type DS-3
■
■

■
■
■

Ventilated, NEMA 2 enclosure
standard.
Suitable for indoor applications,
outdoors when weathershields are
also installed.
Upright mounting only.
220ºC Insulation System, 150ºC
rise standard.
Available in single-phase ratings
15 – 167 kVA and up to 4160 volts
primary.

Application Description

Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code

(UBC) and California Code Title 24.

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer standard dry-type
distribution transformers are designed
for 60 Hertz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one hour;
and 125% load for four hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.

The basic purpose of a transformer
is voltage transformation as near as
practically possible to the load for
economy and distribution of power.
Typical loads for dry-type distribution
transformers include lighting, heating,
air conditioners, fans, and machine
tools. Such loads are found in commercial, institutional, industrial,
and residential structures.







For more information visit: www.cutler-hammer.eaton.com

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer ventilated transformers, Type DS-3, utilize a NEMA 2 rated
(drip-proof) enclosure as standard,
and are rated NEMA 3R with the addition of weathershields. Cutler-Hammer
encapsulated transformers, Type EP,
utilize a NEMA 3R rated enclosure
as standard.

Sound Levels
All Cutler-Hammer 600 volt class
general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to
be installed in an area where sound
may be a concern.
Table 9-2. Average Sound Levels
NEMA ST-20 Average Sound Level in dB
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

CA08101001E

Transformers
General Purpose Transformers

9-3

November 2003
Vol. 1, Ref. No. [0303]

Single-Phase, Types EP, DS-3, 60 Hz

Winding Terminations

Series-Multiple Windings

Primary and secondary windings are
terminated in the wiring compartment.
Encapsulated units have copper leads
or stabs brought out for connections.
Ventilated transformers have leads
brought out to aluminum pads that
are pre-drilled to accept Cu/Al lugs.
Lugs are not supplied with these
transformers. Eaton’s Cutler-Hammer
business recommends external cables
be rated 90°C (sized at 75°C ampacity)
for encapsulated designs and 75°C for
ventilated designs.

Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or 240
with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.

9

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







Transformers
General Purpose Transformers

9-4

November 2003

Single-Phase, Types EP, DS-3, 60 Hz

Vol. 1, Ref. No. [0304]

Product Selection
Additional Product Selection information begins on Page 9-136.

Type EP 3-37.5 kVA

Type DS-3 15-167 kVA

Table 9-3. Single-Phase Selection Information — Types EP, DS-3, 60 Hz

9

kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt. Frame Wiring
Weathershield Style
Lbs. H
kg
Diagram Catalog Price Number
W
D
Number Number U.S. $

Price
U.S. $

120 x 240 Volts to 120/240 Volts 

.5 —
1
—
1.5 —

—
—
—

EP
EP
EP

115
115
115

6-1/2
8-3/8
10-3/4

2
3
5

—
—
—

—
—
—

EP
EP
EP

115
115
115

10-3/4 6-3/16
14-1/8 7-3/4
10-3/8
16

7.5
10
15
25

—
—
—
—

—
—
—
—

EP
EP
EP
EP

115
115
115
115

16
19
19
22-3/8

37.5
50







DS-3 150
DS-3 150

37-5/8 22-5/8
37-5/8 22-5/8

4-7/8
6
6-3/16

10-3/8
13-3/8
13-3/8
16-3/8

4-5/8
5-3/4
6-1/8

13
31
40

165
213
273

124
152
157

117
146
156

6 FR57
14 FR59A
18 FR67

3E
3E
3E

IndoorOutdoor

— S10N11S51N
— S10N11S01N
— S10N11S16N

400.
720.
890.

6-1/8 40
65
8
9-7/8 113

273
359
406

157
197
263

156
203
251

18 FR68
29 FR176
51 FR177

3E
3E
3E

IndoorOutdoor

— S10N11S02N
— S10N11S03N
— S10N11S05N

965.
1,050.
1,425.

123
191
216
375

406
482
482
568

263
339
339
416

251
266
266
368

55
87
98
170

FR178
FR179
FR180
FR182

3E
3E
3E
3E

IndoorOutdoor

—
—
—
—

1,830.
2,225.
2,780.
4,370.

19-1/2 306
19-1/2 340

956
956

574
574

495
495

139 FR817
154 FR818

3XD
3XD

WS11
WS11

13
31
40

165
213
273

124
152
157

117
146
156

6 FR57
14 FR59A
18 FR67

26A
26A
26A

IndoorOutdoor

— S29N11S51N
— S29N11S01N
— S29N11S16N

410.
625.
770.

6-1/8 40
8
65
9-7/8 113

273
359
406

157
197
263

156
203
251

18 FR68
29 FR176
51 FR177

26A
26A
26A

IndoorOutdoor

— S29N11S02N
— S29N11S03N
— S29N11S05N

985.
1,200.
1,775.

26A
26A
26A
26A

IndoorOutdoor

—
—
—
—

2,350.
2,830.
3,350.
4,780.

9-7/8
10-1/2
10-1/2
14-1/2

S10N11S07N
S10N11S10N
S10N11S15N
S10N11S25N

350. T10P11S37
350. T10P11S50

5,490.
6,670.

208 Volts to 120/240 Volts 

.5 —
1
—
1.5 —

—
—
—

EP
EP
EP

115
115
115

6-1/2
8-3/8
10-3/4

4-7/8
6
6-3/16

2
3
5

—
—
—

—
—
—

EP
EP
EP

115
115
115

10-3/4
14-1/8
16

6-3/16
7-3/4
10-3/8

7.5
10
15
25

—
—
—
—

—
—
—
—

EP
EP
EP
EP

115
115
115
115

16
19
19
22-3/8

10-3/8
13-3/8
13-3/8
16-3/8

9-7/8
10-1/2
10-1/2
14-1/8

123
193
216
375

406
482
482
568

263
339
339
416

251
266
266
359

55
87
98
170

25
2@+2.5% 4@-2.5% DS-3 150
37.5 2@+2.5% 4@-2.5% DS-3 150
50
2@+2.5% 4@-2.5% DS-3 150

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2 212
19-1/2 306
19-1/2 340

793
956
956

574
574
574

445
495
495

96 FR816 260A
139 FR817 260A
154 FR818 260A

WS11
WS11
WS11

350. T29M11S25
350. T29M11S37
350. T29M11S50

3,740.
4,580.
5,560.

42-1/8
42-1/8

24
24

23-3/8 510 1070
23-3/8 600 1070

610
610

594
594

232 FR819 260A
272 FR820 260A

WS16
WS16

800. T29M11S75
800. T29R11S99

7,860.
9,760.

75
100

2@+2.5% 4@-2.5% DS-3 150
1@+5%
2@-5%
DS-3 150

4-5/8
5-3/4
6-1/8

FR178
FR179
FR180
FR182

S29N11S07N
S29N11S10N
S29N11S15N
S29N11S25N

277 Volts to 120/240 Volts 

.5 —
1
—
1.5 —

—
—

EP
EP
EP

115
115
115

6-1/2
8-3/8
10-3/4

4-7/8
6
6-3/16

2
3
5

—
—
—

—
—
—

EP
EP
EP

115
115
115

10-3/4
14-1/8
16

6-3/16
7-3/4
10-3/8

7.5
10
15
25

—
—
—
—

—
—
—
—

EP
EP
EP
EP

115
115
115
115

16
19
19
22-3/8

10-3/8
13-3/8
13-3/8
16-3/8

9-7/8
10-1/2
10-1/2
14-1/8

25
2@+2.5% 4@-2.5% DS-3 150
37.5 2@+2.5% 4@-2.5% DS-3 150
50
2@+2.5% 4@-2.5% DS-3 150

31-1/4
37-5/8
37-5/8
42-1/8
42-1/8

75
100




2@+2.5% 4@-2.5% DS-3 150
2@+2.5% 4@-2.5% DS-3 150

4-5/8
5-3/4
6-1/8

13
31
40

165
213
273

124
152
157

117
146
156

6 FR57 514B
14 FR59A 514B
18 FR67 514B

IndoorOutdoor

— S27N11S51A
— S27N11S01A
— S27N11S16A

410.
625.
770.

6-1/8 40
8
65
9-7/8 113

273
359
405

157
197
263

156
203
251

18 FR68 514B
29 FR176 514B
51 FR177 514B

IndoorOutdoor

— S27N11S02A
— S27N11S03N
— S27N11S05N

985.
1,200.
1,775.

123
193
216
375

406
482
482
568

263
339
339
416

251
266
266
359

55
87
98
170

IndoorOutdoor

—
—
—
—

2,350.
2,830.
3,350.
4,780.

22-5/8
22-5/8
22-5/8

17-1/2 212
19-1/2 306
19-1/2 340

793
956
956

574
574
574

445
495
495

96 FR816 262C
139 FR817 262C
154 FR818 262C

WS11
WS11
WS11

350. T27M11S25
350. T27M11S37
350. T27M11S50

3,740.
4,580.
5,560.

24
24

23-3/8 510 1070
23-3/8 600 1070

610
610

594
594

232 FR819 262C
272 FR820 262C

WS16
WS16

800. T27M11S75
800. T27M11S99

7,860.
9,760.

FR178
FR179
FR180
FR182

514B
514B
514B
514B

S27N11S07N
S27N11S10N
S27N11S15N
S27N11S25N

Contact Eaton’s Cutler-Hammer business for availability of 0.05 – 0.25 kVA designs.
1@+5%, 2@-5% at 240 volts primary; 2@+2.5%, 4@-2.5% at 480 volts primary.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-5

November 2003

Single-Phase, Types EP, DS-3, 60 Hz

Vol. 1, Ref. No. [0305]

Table 9-4. Single-Phase Selection Information — Types EP, DS-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt.
Lbs.

Dimensions (mm) Wt. Frame
kg
W
D

H

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

240 x 480 Volts to 120/240 Volts
.050 —
.075 —
.100 —

—
—
—

EP
EP
EP

115
115
115

6-1/2
6-1/2
6-1/2

3-7/8
3-7/8
3-7/8

3-1/2
3-1/2
3-1/2

7
7
7

165
165
165

98
98
98

89
89
89

3 FR52
3 FR53
3 FR54

3A
3A
3A

IndoorOutdoor

— S20N11S81N
— S20N11S85N
— S20N11S82N

75.
85.
95.

.150 —
.25 —
.5
—

—
—
—

EP
EP
EP

115
115
115

6-1/2
6-1/2
6-1/2

3-7/8
4-7/8
4-7/8

3-1/2
3-7/8
4-5/8

8
12
13

165
165
165

98
124
124

89
98
117

4 FR55
5 FR56
6 FR57

3A
3A
3A

IndoorOutdoor

— S20N11S83N
— S20N11S26N
— S20N11S51N

110.
135.
170.

.75
1
1.5

—
—
—

—
—
—

EP
EP
EP

115
115
115

8-3/8
8-3/8
10-3/4

6
6
6-3/16

5-3/4
5-3/4
6-1/8

21
31
40

213
213
273

152
152
157

146
146
156

10 FR58A
14 FR59A
18 FR67

3A
3A
3A

IndoorOutdoor

— S20N11S76N
— S20N11S01N
— S20N11S16N

220.
260.
320.

2
3
3

—
—

—
—

EP
EP
EP

115
115
115

10-3/4
14-1/8
14-1/8

6-3/16
7-3/4
7-3/4

6-1/8
8
8

40
65
65

273
359
359

157
197
197

156
203
203

18 FR68
29 FR176
29 FR176

3A
3A
9A

IndoorOutdoor

— S20N11S02N
— S20N11S03N
— S20K11S03N

410.
500.
525.

5
5
7.5

—

—

EP
EP
EP

115
115
115

16
16
16

10-3/8
10-3/8
10-3/8

9-7/8
9-7/8
9-7/8

113
113
123

406
406
406

263
263
263

251
251
251

51 FR177
51 FR177
55 FR178

3A
9A
3A

IndoorOutdoor

— S20N11S05N
— S20K11S05N
— S20N11S07N

740.
775.
980.

7.5
10
10

EP
EP
EP

115
115
115

16
19
19

10-3/8
13-3/8
13-3/8

9-7/8
10-1/2
10-1/2

123
193
193

406
482
482

263
339
339

251
266
266

55 FR178
87 FR179
87 FR179

9A
3A
9A

IndoorOutdoor

— S20K11S07N
— S20N11S10N
— S20K11S10N

1,030.
1,180.
1,240.

15
15
25

—

115
115
115

19
13-3/8
19
13-3/8
22-3/8 16-3/8

10-1/2
10-1/2
14-1/2

216
216
375

482
482
568

339
339
416

266
266
368

98 FR180
98 FR180
170 FR182

3A
23A
3A

IndoorOutdoor

— S20N11S15N
— S20L11S15N
— S20N11S25N

1,540.
1,600.
1,900.

25
37.5

— S20L11S25N
— S20L11S37

2,250.
9,400.

15
25
37.5
50
75
100
167


















—

—







—

—











—

—

—

EP
EP
EP







EP
EP

115
115

22-3/8 16-3/8
28-1/4 22-5/8

14-1/2
14-5/8

375
950

568
717

416
575

368
371

170 FR182 23A
432 FR300A 23A

IndoorOutdoor









DS-3 150
DS-3 150
DS-3 150

30-1/4 16-7/8
31-1/4 22-5/8
37-5/8 22-5/8

15-7/8
17-1/2
19-1/2

147
212
306

768
793
956

428
574
574

402
445
495

67 FR815
96 FR816
139 FR817

3XA
3XA
3XA

WS15
WS11
WS11

350. T20P11S15
350. T20P11S25
350. T20P11S37

1,440.
1,870.
2,290.









150
150
150
150

37-5/8
42-1/8
42-1/8
62-1/2

19-1/2 340 956
23-3/8 510 1070
23-3/8 600 1070
34
1200 1597

574
610
610
762

495
594
594
863

154
232
272
545

3XA
3XA
3XA
288A

WS11
WS16
WS16
WS13

350.
800.
800.
800.

3,220.
3,930.
4,880.
9,500.

DS-3
DS-3
DS-3
2@+2.5% 4@-2.5% DS-3

22-5/8
24
24
30

FR818
FR819
FR820
FR814

T20P11S50
T20P11S75
T20P11S99
T48M11S67D 

1@+10% FCBN at 240 volts; 2@+5% FCBN at 480 volts.
2@+5% FCBN at 240 volts; 4@+2.5% FCBN at 480 volts.
1@+5%, 2@-5% at 240 volts primary; 2@+2.5%, 4@-2.5% at 480 volts primary.
480V primary to 120/240 volts secondary.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-6

November 2003

Single-Phase, Types EP, DS-3, 60 Hz

Vol. 1, Ref. No. [0306]

Table 9-5. Single-Phase Selection Information — Types EP, DS-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

190/200/208/220 x 380/400/416/440 Volts to 110/220 Volts 50/60 Hz — Export Model IP 22 Rated
.5
1
1.5
2

—
—
—
—

—
—
—
—

EP
EP
EP
EP

115
115
115
115

10-3/4
10-3/4
10-3/4
11-1/8

6-1/8
6-1/8
6-1/8
7-3/4

6-5/8
6-5/8
6-5/8
8

42
42
46
70

273
273
273
281

155
155
155
197

166
166
166
203

19
19
21
33

FR67
FR67
FR67
FR176

538A
538A
538A
538A

IndoorOutdoor

—
—
—
—

S40N14S51CE
S40N14S01CE
S40N14S16CE
S40N14S02CE

760.
830.
1,030.
1,225.

3
5
7.5

—
—
—

—
—
—

EP
EP
EP

115
115
115

12-7/8
12-7/8
15-7/8

10-3/8
10-3/8
13-3/8

9-7/8
9-7/8
10-5/8

113
140
193

326
326
402

264
264
340

251
251
267

51
63
87

FR177
FR178
FR179

538A
538A
538A

IndoorOutdoor

— S40N14S03CE
— S40N14S05CE
— S40N14S07CE

1,570.
2,000.
2,625.

—
—

—
—

EP
EP

115
115

15-7/8
17-1/8

13-3/8
16-3/8

10-5/8
14-1/8

216
375

402
433

340
415

267
359

98
170

FR180
FR182

538A
538A

IndoorOutdoor

— S40N14S10CE
— S40N14S15CE

3,160.
4,060.

8
9-7/8
9-7/8

65
113
123

359
406
406

195
263
263

203
251
251

29
51
55

FR176
FR177
FR178

3A
3A
3A

IndoorOutdoor

— S20N11S03SS
— S20N11S05SS
— S20N11S07SS

750.
1,110.
1,470.

10-1/2
10-1/2
14-1/8

179
216
375

482
482
566

339
339
416

266
266
359

87
98
170

FR179
FR180
FR182

3A
3A
3A

IndoorOutdoor

— S20N11S10SS
— S20N11S15SS
— S20N11S25SS

1,770.
2,200.
2,850.

5-3/4
6-1/8
6-1/8

31
40
40

213
273
273

152
157
157

146
156
156

14
18
18

FR59A
FR67
FR68

2D
2D
2D

IndoorOutdoor

— S48G11S01N
— S48G11S16N
— S48G11S02N

312.
385.
495.

10
15

240 x 480 Volts to 120/240 Volts Stainless Steel 

3
5
7.5
10
15
25

9

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8
16
16

—
—
—

—
—
—

EP
EP
EP

115
115
115

19
13-3/8
19
13-3/8
21-5/16 16-3/8

7-11/16
10-3/8
10-3/8

480 Volts to 120/240 Volts
1
1.5
2

—
—
—

EP
EP
EP

115
115
115

8-3/8
10-3/4
10-3/4

3
3
5

—
2@-5%
EP
2@+2.5% 2@+2.5% EP
—
2@-5%
EP

115
115
115

14-1/8
14-1/8
16

7-3/4
7-3/4
10-3/8

8
8
9-7/8

65
65
113

359
359
406

197
197
263

203
203
251

29
29
51

FR176
FR176
FR177

2D
16A
2D

IndoorOutdoor

— S48G11S03N
— S48D11S03N
— S48G11S05N

600.
600.
890.

5
7.5
7.5

2@+2.5% 2@+2.5% EP
—
2@-5%
EP
2@+2.5% 2@+2.5% EP

115
115
115

16
16
16

10-3/8
10-3/8
10-3/8

9-7/8
9-7/8
9-7/8

113
123
123

406
406
406

263
263
263

251
251
251

51
55
55

FR177
FR178
FR178

16A
2D
16A

IndoorOutdoor

— S48D11S05N
— S48G11S07N
— S48D11S07N

890.
1,180.
1,180.

10
10
15

—
2@-5%
EP
2@+2.5% 2@+2.5% EP
—
2@-5%
EP

115
115
115

19
19
19

13-3/8
13-3/8
13-3/8

10-1/2
10-1/2
10-1/2

193
193
216

482
482
482

339
339
339

266
266
266

87
87
98

FR179
FR179
FR180

2D
16A
2D

IndoorOutdoor

— S48G11S10N
— S48D11S10N
— S48G11S15N

1,415.
1,415.
1,850.

15
25
25

2@+2.5% 2@+2.5% EP
—
2@-5%
EP
2@+2.5% 4@-2.5% EP

115
115
115

19
22-3/8
20-3/4

13-3/8
16-3/8
19-1/8

10-1/2
14-1/8
13-5/8

216
375
175

482
568
525

339
416
483

266
359
349

98
170
80

FR180
FR182
FR132

16A
2D
83A

IndoorOutdoor

— S48D11S15N
— S48G11S25N
— S48M11S25N

1,850.
2,395.
2,395.

2,620.
3,500.
4,430.

2@-5%
2@-5%
2@-5%

6
6-3/16
6-3/16

480 Volts to 120/240 Volts Stainless Steel, Copper Windings 

10
15
25

2@+2.5% 2@+2.5% EP
2@+2.5% 2@+2.5% EP
2@+2.5% 4@-2.5% EP

115
115
115

19
19
20-3/4

13-3/8
13-3/8
19-1/8

10-1/2
10-1/2
13-5/8

208
235
175

482
482
525

339
339
483

266
266
349

94
106
80

FR179
FR180
FR132

16A
16A
83A

IndoorOutdoor

— S48D11S10SSCU
— S48D11S15SSCU
— S48M11S25SSCU

600 Volts to 120/240 Volts
.5
.75
1

—
—
—

2@-5%
2@-5%
2@-5%

EP
EP
EP

115
115
115

6-1/2
8-3/8
8-3/8

4-7/8
6
6

4-5/8
5-3/4
5-3/4

13
21
31

165
213
213

124
152
152

117
146
146

6
10
14

FR57
FR58A
FR59A

2I
2I
2I

IndoorOutdoor

— S60G11S51N
— S60G11S76N
— S60G11S01N

255.
330.
390.

1.5
2
3

—
—
—

2@-5%
2@-5%
2@-5%

EP
EP
EP

115
115
115

10-3/4
10-3/4
14-1/8

6-3/16
6-3/16
7-3/4

6-1/8
6-1/8
8

40
40
65

273
273
359

157
157
197

156
156
203

18
18
29

FR67
FR68
FR176

2I
2I
2I

IndoorOutdoor

— S60G11S16N
— S60G11S02N
— S60G11S03N

475.
610.
740.

5
7.5
10

—
—
—

2@-5%
2@-5%
2@-5%

EP
EP
EP

115
115
115

16
16
19

10-3/8
10-3/8
13-3/8

9-7/8
9-7/8
10-1/2

113
123
193

406
406
482

263
263
339

251
251
266

51
55
87

FR177
FR178
FR179

2I
2I
2I

IndoorOutdoor

— S60G11S05N
— S60G11S07N
— S60G11S10N

1,110.
1,460.
1,760.

15
25
25

—
—
2 @ 2.5%

4@-2.5%
4@-2.5%
4@-2.5%

EP
EP
EP

115
115
115

19
22-3/8
20-3/4

13-3/8
16-3/8
19-1/8

10-1/2
14-1/8
13-5/8

216
375
175

482
568
525

339
416
483

266
359
349

98
170
80

FR180
FR182
FR132

527A
527A
83B

IndoorOutdoor

— S60J11S15N
— S60J11S25N
— S60M11S25N

2,400.
2,825.
2,825.

25
37.5
50

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DS-3
DS-3
DS-3

150
150
150

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

212
306
340

793
956
956

574
574
574

445
495
495

96
139
154

FR816
FR817
FR818

276B
276B
276B

WS11
WS11
WS11

350. T60M11S25B
350. T60M11S37
350. T60M11S50D

2,240.
2,750.
3,340.

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DS-3
DS-3
DS-3

150
150
150

42-1/8
42-1/8
62-7/8

24
24
30

23-3/8
23-3/8
34

510
600
1200

1070
1070
1597

610
610
762

594
594
863

232
272
545

FR819
FR820
FR814

276B
276B
288B

WS16
WS16
WS13

800. T60M11S75
800. T60M11S99
800. T60M11S67A

4,720.
5,860.
11,400.

75
100
167



NEMA 3R, 316 stainless steel enclosure.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-7

November 2003

Single-Phase, Types EP, DS-3, 60 Hz

Vol. 1, Ref. No. [0307]

Table 9-6. Single-Phase Selection Information — Types EP, DS-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt. Frame Wiring
Weathershield Style
Lbs. H
kg
Diagram Catalog Price Number
W
D
Number Number U.S. $

Price
U.S. $

2400 Volts to 120/240 Volts
1.5

3
5
10
15
25
37.5
50
75
100

6-1/8

40

273

157

156

181

FR68

18A

Recommended
Indoor
Only

— S42N11S16N 


3,100.

10-3/8
10-3/8
13-3/8
16-3/8
16-3/8

9-7/8
9-7/8
10-1/2
14-1/8
14-1/8

113
123
216
375
405

406
406
482
566
668

263
263
339
416
416

251
251
266
359
359

51
55
87
170
183

FR177
FR178
FR179
FR182
FR190

12A
12A
12A
12A
12A

Recommended
Indoor
Only

—
—
—
—
—

S42J11S03N 

S42J11S05N 

S42J11S10N 

S42J11S15N 

S42J11S25N 


3,290.
3,460.
4,930.
5,830.
8,270.

28
30
30
36

22
24
24
27

20
26
26
26

300
420
500
570

684
732
732
879

537
586
586
659

488
635
635
635

137
191
228
260











Recommended
Indoor
Only

—
—
—
—

T42D11S37 
T42D11S50 
T42D11S75 
T42D11S99 

5,500.
6,350.
7,860.
8,600.

150
150

28
30

22
24

20
26

300
420

684
732

537
586

488
635

137
191







Recommended
Indoor
Only

— T42D21S37 
— T42D21S50 

5,500.
6,350.

6-1/8

40

273

157

156

181

FR68

524G

Recommended
Indoor
Only

— S46N11S16N 


2,580.

12B
12B
12B
12B

Recommended
Indoor
Only

—
—
—
—

S46J11S03N 

S46J11S05N 

S46J11S10A 

S46J11S15A 


3,295.
3,460.
4,930.
5,830.

—

—

EP

115

10-3/4

—
—
—
—
—

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

EP
EP
EP
EP
EP

115
115
115
115
115

16
16
19
22-3/8
26-3/8

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5%
2@-2.5%
2@-2.5%
2@-2.5%

DS-3
DS-3
DS-3
DS-3

150
150
150
150

DS-3
DS-3

6-3/16

2400 Volts to 240/480 Volts
37.5
50

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

4160 Volts to 120/240 Volts
1.5

—

—

EP

115

10-3/4

3
5
10
15

—
—
—
—

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

EP
EP
EP
EP

115
115
115
115

16
16
19
22-5/16

10-3/8
10-3/8
13-3/8
16-3/8

9-7/8
9-7/8
10-1/2
14-1/8

113
123
193
375

406
406
482
566

263
263
339
416

251
251
266
359

51
55
87
170

FR177
FR178
FR179
FR182

25
37.5
50

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DS-3
DS-3
DS-3

150
150
150

28
28
30

22
22
24

20
20
26

280
300
420

984
684
732

537
537
586

488
488
635

128
137
191









Recommended
Indoor
Only

— T46D11S25 
— T46D11S37 
— T46D11S50 

4,800.
5,500.
6,350.

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DS-3
DS-3
DS-3

150
150
150

30
36
50

24
27
33

26
26
35

500
570
1000

732
879
1220

586
659
806

635
635
854

228
260
455









Recommended
Indoor
Only

— T46D11S75 
— T46D11S99 
— T46D11S67 

7,860.
8,600.
16,800.

DS-3
DS-3
DS-3
DS-3

150
150
150
150

28
30
30
36

22
24
24
27

20
26
26
26

300
420
500
570

684
732
732
879

537
586
586
659

488
635
635
635

137
191
228
260











Recommended
Indoor
Only

—
—
—
—

T46D21S37 
T46D21S50 
T46D21S75 
T46D21S99 

5,500.
6,350.
7,860.
8,600.

75
100
167

6-3/16

4160 Volts to 240/480 Volts
37.5
50
75
100






2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5%
2@-2.5%
2@-2.5%
2@-2.5%

No UL label.
Refer to your Cutler-Hammer sales office.
NEMA 3R enclosure and/or UL label available at additional cost. Specify at time of order entry if required.
Not seismic qualified.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-8

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Three-Phase, Types EPT,
DT-3, 60 Hz

Vol. 1, Ref. No. [0308]

Application Description

Options and Accessories

The basic purpose of a transformer
is voltage transformation as near as
practically possible to the load for
economy and distribution of power.
Typical loads for dry-type distribution
transformers include lighting, heating,
air conditioners, fans and machine
tools. Such loads are found in commercial, institutional, industrial and
residential structures.

Please refer to Page 9-120.

Features, Benefits
and Functions
Type EPT Encapsulated

9

Product Description
Type EPT
■
■
■
■
■
■
■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC rise
standard.
Available in ratings through 75 kVA
and 4160 volts primary.

Type DT-3
■
■

■
■
■

Ventilated, NEMA 2 enclosure
standard.
Suitable for indoor applications,
outdoors when weathershields are
also installed.
Upright mounting only.
220ºC Insulation System, 150ºC rise
standard.
Available in three-phase ratings
15 – 1500 kVA and up to 4160 volts
primary.

■

UL listed.
■ 60 Hz operation standard,
50/60 Hz operation available.
■ Short-term overload capability as
required by ANSI.
■ Meet NEMA ST-20 sound levels.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers are built and
tested in accordance with applicable
NEMA, ANSI and IEEE Standards. All
600 volt class transformers are UL
listed unless otherwise noted.

Product Specifications
Frequency
Cutler-Hammer standard dry-type
distribution transformers are designed
for 60 Hertz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one half hour; 150% load for one hour;
and 125% load for four hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose Transformers

9-9

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0309]

Insulation System and Temperature Rise

Sound Levels

Series-Multiple Windings

Industry standards classify insulation
systems and rise as shown below:

All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions Lower sound levels are
available and should be specified
when the transformer is going to be
installed in an area where sound may
be a concern.

Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or
240 with a 120 mid-point.

Table 9-7. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Eaton’s Cutler-Hammer ventilated
transformers, Type DT-3, utilize a
NEMA 2 rated (drip-proof) enclosure
as standard, and are rated NEMA 3R
with the addition of weathershields.
Cutler-Hammer encapsulated transformers, Type EPT, utilize a NEMA 3R
rated enclosure as standard.

Table 9-8. Average Sound Levels
NEMA ST-20 Average Sound level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64




Technical Data
and Specifications
Please refer to Page 9-122.

Applies to general purpose ventilated
transformers only.

Winding Terminations
Primary and secondary windings are
terminated in the wiring compartment.
Encapsulated units have copper leads
or stabs brought out for connections.
Ventilated transformers have leads
brought out to aluminum pads that are
pre-drilled to accept Cu/Al lugs. Lugs are
not supplied with these transformers.
The Cutler-Hammer business recommends external cables be rated 90°C
(sized at 75°C ampacity) for encapsulated designs and 75°C for ventilated
designs.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
General Purpose Transformers

9-10

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0310]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-9. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

208 ∆ Volts to 480Y/277 Volts
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
140

FR909
FR910A
FR912A

280E
280E
280E

WS31
WS31
WS31

350. V29M47T15N
350. V29M47T30N
350. V29M47T45N

2,030.
2,590.
3,150.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
660

486
486
585

217
272
344

FR914B
FR915B
FR916A

280E
280E
280E

WS33
WS33
WS19

350. V29M47T75N
350. V29M47T12N
350. V29M47T49N

4,460.
6,450.
8,100.

225
300
500

1@+5%
1@+5%
—

DT-3
DT-3
DT-3

150
150
150

62-1/4
62-1/4
75

31-1/4
31-1/4
44-1/2

30-1/4
30-1/4
36

1600
1600
2400

1581
1581
1905

794
794
1130

768
768
914

728 FR918A
728 FR918A
1088 FR919

333B
333B
290B

WS34
WS34
WS35

800. V29R47T22N
800. V29R47T33N
1,360. V29G47T55N

11,850.
15,000.
22,400.

EPT
EPT
EPT

115
115
115

13-3/8
15-7/8
15-7/8

15-15/16
16-1/2
16-1/2

8-5/16
9-7/8
9-7/8

116
143
166

340
403
403

405
419
419

211
251
251

53
65
75

FR201
FR200
FR103

IndoorOutdoor

— Y25G19T03A
— Y25G19T06A
— Y25G19T09A

1,380.
1,680.
2,170.

— Y25G19T15A
— Y25M19T30A
— Y25M19T45A

2,730.
5,200.
6,500.

2@-5%
2@-5%
2@-5%

220 ∆ Volts to 190Y/110 Volts
3
6
9

9

—
—
—

2@-5%
2@-5%
2@-5%

70I
70I
70I

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

17-3/8
26-5/8
26-1/2

19-11/16 10-7/16
25-1/4
12-3/4
28-1/2
14-5/8

275
422
660

442
676
673

500
638
724

265
324
372

125
191
299

FR95
FR243
FR244








IndoorOutdoor

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280Q
280Q
280Q

WS31
WS31
WS31

350. V25M19T15A
350. V25M19T30A
350. V25M19T45A

1,825.
2,330.
2,840.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280Q
280Q
280Q

WS33
WS33
WS19

350. V25M19T75A
350. V25M19T12A
350. V25M19T49A

4,010.
5,800.
7,290.

225
300
500

1@+5%
1@+5%
—

DT-3
DT-3
DT-3

150
150
150

62-1/4
62-1/4
75

31-1/4
31-1/4
44-1/2

30-1/4
30-1/4
36

1600
1600
2400

1581
1581
1905

794
794
1130

768
768
914

728 FR918A
728 FR918A
1088 FR919

289F
289F
289F

WS34
WS34
WS35

800. V25R19T22A
800. V25R19T33A
1,360. V25G19T55A

10,660.
13,500.
21,600.

EPT
EPT
EPT

115
115
115

13-3/8
15-7/8
15-7/8

15-15/16
16-1/2
16-1/2

8-5/16
9-7/8
9-7/8

116
143
166

340
403
403

405
419
419

211
251
251

53
65
75

FR201
FR200
FR103

70Q
70Q
70Q

IndoorOutdoor

— Y25G28T03A
— Y25G28T06A
— Y25G28T09A

1,590.
1,935.
1,700.

— Y25G28T15A
— Y25M28T30A
— Y25M28T45A

2,510.
6,000.
7,500.

2@-5%
2@-5%
2@-5%

220 ∆ Volts to 208Y/120 Volts
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

17-3/8
26-3/8
26-1/2

19-11/16 10-7/16
25-1/4
12-3/4
28-1/2
14-5/8

275
422
660

442
676
673

500
638
724

265
324
372

125
191
299

FR95
FR243
FR244

70Q
84AF
84AF

IndoorOutdoor

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280Q
280Q
280Q

WS31
WS31
WS31

350. V25M28T15A
350. V25M28T30A
350. V25M28T45A

1,825.
2,330.
2,840.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280Q
280Q
280Q

WS33
WS33
WS19

350. V25M28T75A
350. V25M28T12A
350. V25M28T49A

4,010.
5,800.
7,290.

225
300
500

1@+5%
1@+5%
—

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

289F
289F
289F

WS34
WS34
WS35

800. V25R28T22A
800. V25R28T33A
1,360. V25G28T55A

10,660.
13,500.
21,600.

EPT
EPT
EPT

115
115
115

13-3/8
15-7/8
15-7/8

15-15/16
16-1/2
16-1/2

8-5/16
9-7/8
9-7/8

116
143
166

340
403
403

405
419
419

211
251
251

53
65
75

FR201
FR200
FR103

70X
70X
70X

IndoorOutdoor

— Y25G37T03A
— Y25G37T06A
— Y25G37T09A

1,590.
1,935.
2,505.

— Y25G37T15A
— Y25M37T30A
— Y25M37T45A

3,150.
6,000.
7,500.

2@-5%
2@-5%
2@-5%

220 ∆ Volts to 380Y/220 Volts
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

17-3/8
26-5/8
26-1/2

19-11/16 10-7/16
25-1/4
12-3/4
28-1/2
14-5/8

275
422
660

442
676
673

500
638
724

265
324
372

125
191
299

FR95
FR243
FR244

70X
84AF
84AF

IndoorOutdoor

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280Q
280Q
280Q

WS31
WS31
WS31

350. V25M37T15A
350. V25M37T30A
350. V25M37T45A

1,890.
2,415.
2,940.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280Q
280Q
280Q

WS33
WS33
WS19

350. V25M37T75A
350. V25M37T12A
350. V25M37T49A

4,155.
6,020.
7,560.

225
300
500

1@+5%
1@+5%
—

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

289F
289F
289F

WS34
WS34
WS35

800. V25R37T22A
800. V25R37T33A
1,360. V25G37T55A

11,060.
14,000.
21,600.




2@-5%
2@-5%
2@-5%

Refer to your Cutler-Hammer sales office.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-11

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0311]

Table 9-10. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Dimensions (Inches)
Type °C
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Diagram Weathershield Style
Wiring
Catalog Price Number
Number Number U.S. $

Price
U.S. $

240 ∆ Volts to 208Y/120 Volts
9
15
30
45

—
—
2@+2.5%
2@+2.5%

2@-5%
2@-5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT
EPT

115
115
115
115

15-7/8
17-3/8
26-5/8
26-1/2

16-1/2
19-3/4
25-1/4
28-1/2

9-7/8
10-1/2
12-3/4
14-5/8

166
275
422
660

403
441
676
673

419
499
638
723

251
265
323
371

75
124
191
299

FR103
FR95
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
140

FR909
280C
FR910A 280C
FR912A 280C

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

486
486
585

217
272
344

225
300
500

1@+5%
1@+5%
—

DT-3
DT-3
DT-3

150
150
150

62-1/4
64-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

793
794
1130

616
768
914

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70F
70F
70F
70F

IndoorOutdoor

—
—
—
—

Y38G19T03A
Y38G19T06A
Y38G19T09A
Y38G19T15A

1,220.
1,480.
1,920.
2,415.

84AC
84AC
84AC

IndoorOutdoor

— Y38M19T30A
— Y38M19T45A
— Y38M19T75A 


4,600.
5,750.
7,150.

2@-5%
2@-5%
2@-5%

Y24G28T09N
Y24G28T15N
Y24M28T30N
Y24M28T45N

2,510.
3,150.
6,000.
7,500.

WS31
WS31
WS31

350. V24M28T15B
350. V24M28T30N
350. V24M28T45N

1,825.
2,330.
2,840.

FR914B 280C
FR915B 280C
FR916A 280C

WS33
WS33
WS19

350. V24M28T75N
350. V24M28T12N
350. V24M28T49N

4,010.
5,800.
7,290.

499 FR918A 289A
728 FR918A 289A
1088 FR919
290A

WS34
WS34
WS35

800. V24R28T22N
800. V24R28T33N
1,360. V24G28T55N

10,660.
15,600.
22,600.

70C
70C
84C
84C

IndoorOutdoor

—
—
—
—

380 ∆ Volts to 190Y/110 Volts
3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
781

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
280L
FR910A 280L
FR912A 280L

WS31
WS31
WS31

350. V38M19T15A
350. V38M19T30A
350. V38M19T45A

1,800.
2,000.
2,500.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B 280L
FR915B 280L
FR916A 280L

WS33
WS33
WS19

350. V38M19T75A
350. V38M19T12A
350. V38M19T49A

3,400.
4,900.
6,850.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
280L
728 FR918A 

1088 FR919

WS34
WS34
WS35

800. V38M19T22A
800. V38M19T33A
1,360. V38M19T55A

9,100.
11,500.
18,500.

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70D
70D
70D
70D

IndoorOutdoor

—
—
—
—

Y38G28T03A
Y38G28T06A
Y38G28T09A
Y38G28T15A

1,275.
1,550.
2,005.
2,520.

84R
84R
84R

IndoorOutdoor

— Y38M28T30A
— Y38M28T45A
— Y38M28T75A 


4,600.
5,750.
7,130.

2@-5%
2@-5%
2@-5%
2@-5%

380 ∆ Volts to 208Y/120 Volts
3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
781

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
280L
FR910A 280L
FR912A 280L

WS31
WS31
WS31

350. V38M28T15A
350. V38M28T30A
350. V38M28T45A

1,800.
2,000.
2,500.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B 280L
FR915B 280L
FR916A 280L

WS33
WS33
WS19

350. V38M28T75A
350. V38M28T12A
350. V38M28T49A

3,400.
4,900.
6,850.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
280L
728 FR918A 280L

1088 FR919

WS34
WS34
WS35

800. V38M28T22A
800. V38M28T33A
1,360. V38M28T55A

9,100.
11,500.
18,500.

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70F
70F
70F
70F

IndoorOutdoor

—
—
—
—

Y38G31T03A
Y38G31T06A
Y38G31T09A
Y38G31T15A

1,220.
1,480.
1,920.
2,415.

84R
84R
84R

IndoorOutdoor

— Y38M31T30A
— Y38M31T45A
— Y38M31T75A 


4,600.
5,750.
7,130.

2@-5%
2@-5%
2@-5%
2@-5%

380 ∆ Volts to 220Y/127 Volts
3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
781

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
280L
FR910A 280L
FR912A 280L

WS31
WS31
WS31

350. V38M31T15A
350. V38M31T30A
350. V38M31T45A

1,800.
2,000.
2,500.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B 280L
FR915B 280L
FR916A 280L

WS33
WS33
WS19

350. V38M31T75A
350. V38M31T12A
350. V38M31T49A

3,400.
4,900.
6,850.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
280L
728 FR918A 280L
1088 FR919
275H

WS34
WS34
WS35

800. V38M31T22A
800. V38M31T33A
1,360. V38M31T55A

9,100.
11,500.
18,500.





2@-5%
2@-5%
2@-5%
2@-5%

Floor mount only.
Refer to your Cutler-Hammer sales office.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-12

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0312]

Table 9-11. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield
Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

380 ∆ Volts to 220 ∆ Volts

9

3
6
9
15

—
—
—
—

2@-5%
2@-5%
2@-5%
2@-5%

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

30
45
75

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

225
300
500

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

2@+2.5%
2@+2.5%
2@+2.5%

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
281D
FR910A 281D
FR912A 281D

WS31
WS31
WS31

350. V38M25T15A
350. V38M25T30A
350. V38M25T45A

1,800.
2,000.
2,500.

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B 281D
FR915B 281D
FR916A 281D

WS33
WS33
WS19

350. V38M25T75A
350. V38M25T12A
350. V38M25T49A

3,400.
4,900.
6,850.

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
281D
728 FR918A 281D


1088 FR919

WS34
WS34
WS35

800. V38M25T22A
800. V38M25T33A
1,360. V38M25T55A

9,100.
11,500.
18,500.

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70D
70D
70D
70D

IndoorOutdoor

—
—
—
—

Y38G37T03A
Y38G37T06A
Y38G37T09A
Y38G37T15A

1,380.
1,670.
2,170.
2,730.

84H
84H
84H

IndoorOutdoor

— Y38M37T30A
— Y38M37T45A
— Y38M37T75A 

5,200.
6,500.
8,060.

74K
74K
74K
74K







IndoorOutdoor

—
—
—
—

Y38G25T03A
Y38G25T06A
Y38G25T09A
Y38G25T15A

1,220.
1,480.
1,920.
2,415.

IndoorOutdoor

— Y38M25T30A
— Y38M25T45A
— Y38M25T75A 

4,600.
5,750.
7,150.

380 ∆ Volts to 380Y/220 Volts
3
6
9
15

—
—
—
—

2@-5%
2@-5%
2@-5%
2@-5%

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

30
45
75

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
280L
FR910A 280L
FR912A 280L

WS31
WS31
WS31

350. V38M37T15A
350. V38M37T30A
350. V38M37T45A

1,890.
2,415.
2,940.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B 280L
FR915B 280L
FR916A 280L

WS33
WS33
WS19

350. V38M37T75A
350. V38M37T12A
350. V38M37T49A

4,160.
6,020.
7,560.

225
300
500

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
280L
728 FR918A 280L


1088 FR919

WS34
WS34
WS35

800. V38M37T22A
800. V38M37T33A
1,360. V38M37T55A

11,060.
14,000.
22,400.

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70F
70F
70F
70F

IndoorOutdoor

—
—
—
—

Y38G47T03A
Y38G47T06A
Y38G47T09A
Y38G47T15A

1,590.
1,935.
2,505.
3,150.

84AB
84AB
84AB

IndoorOutdoor

— Y38M47T30A
— Y38M47T45A
— Y38M47T75A 

6,000.
7,500.
9,300.

2@+2.5%
2@+2.5%
2@+2.5%

380 ∆ Volts to 480Y/277 Volts
3
6
9
15

—
—
—
—

2@-5%
2@-5%
2@-5%
2@-5%

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

30
45
75

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
280L
FR910A 280L
FR912A 280L

WS31
WS31
WS31

350. V38M47T15A
350. V38M47T30A
350. V38M47T45A

2,090.
2,675.
3,260.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B 280L
FR915B 280L
FR916A 280L

WS33
WS33
WS19

350. V38M47T75A
350. V38M47T12A
350. V38M47T49A

4,600.
6,665.
8,370.

225
300
500

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
280L
728 FR918A 280L


1088 FR919

WS34
WS34
WS35

800. V38M47T22A
800. V38M47T33A
1,360. V38M47T55A

12,245.
15,500.
24,800.





2@+2.5%
2@+2.5%
2@+2.5%

Refer to your Cutler-Hammer sales office.
Floor mount only.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-13

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0313]

Table 9-12. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

416 ∆ Volts to 208Y/120 Volts
3
6
9
15

—
—
—
—

30
45
75

2@-5%
2@-5%
2@-5%
2@-5%

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70V
70V
70V
70V

IndoorOutdoor

—
—
—
—

Y43G28T03A
Y43G28T06A
Y43G28T09A
Y43G28T15A

1,275.
1,550.
2,005.
2,520.

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

84I
84I
84I

IndoorOutdoor

— Y43M28T30A
— Y43M28T45A
— Y43M28T75A 

4,600.
5,750.
7,150.

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280P
280P
280P

WS31
WS31
WS31

350. V43M28T15A
350. V43M28T30A
350. V43M28T45A

1,800.
2,000.
2,530.

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280P
280P
280P

WS33
WS33
WS19

350. V43M28T75A
350. V43M28T12A
350. V43M28T49A

3,450.
4,950.
6,850.

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

280P
280P

WS34
WS34
WS35

800. V43M28T22A
800. V43M28T33A
1,360. V43M28T55A

9,080.
11,500.
18,500.

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70G
70G
70G
70G

IndoorOutdoor

—
—
—
—

Y44G31T03A
Y44G31T06A
Y44G31T09A
Y44G31T15A

1,590.
1,935.
2,505.
3,150.

84O
84O
84O

IndoorOutdoor

— Y44M31T30A
— Y44M31T45A
— Y44M31T75A 

4,600.
5,750.
7,150.

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

499 FR917
728 FR918A
1088 FR919




440 ∆ Volts to 220Y/127 Volts
3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280J
280J
280J

WS31
WS31
WS31

350. V44M31T15A
350. V44M31T30A
350. V44M31T45A

1,800.
2,000.
2,500.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280J
280J
280J

WS33
WS33
WS19

350. V44M31T75A
350. V44M31T12A
350. V44M31T49A

3,420.
4,945.
6,220.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

280J
280J
275F

WS34
WS34
WS35

800. V44M31T22A
800. V44M31T33A
1,360. V44M31T55A

9,100.
11,500.
18,500.

2@-5%
2@-5%
2@-5%
2@-5%

480 ∆ Volts to 208Y/120 Volts
3
6
6

—
2@-5%
—
2@-5%
2@+2.5% 2@-2.5%

EPT
EPT
EPT

115
115
115

13-3/8
15-7/8
15-7/8

16
16-1/2
16-1/2

8-3/8
9-7/8
9-7/8

116
143
143

339
403
403

404
419
419

211
251
251

52
64
64

FR201
FR200
FR200

70A
70A
72B

IndoorOutdoor

— Y48G28T03N
— Y48G28T06N
— Y48D28T06N

1,060.
1,290.
1,290.

9
9
9

—
2@-5%
—
4@-2.5%
2@+2.5% 2@-2.5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
15-7/8

16-1/2
16-1/2
16-1/2

9-7/8
9-7/8
9-7/8

166
166
166

403
403
403

419
419
419

251
251
251

75
75
75

FR103
FR103
FR103

70A
503A
72B

IndoorOutdoor

— Y48G28T09N
— Y48J28T09N
— Y48D28T09N

1,670.
1,670.
1,670.

15
15
15

—
2@-5%
—
4@-2.5%
2@+2.5% 2@-2.5%

EPT
EPT
EPT

115
115
115

17-3/8
17-3/8
17-3/8

19-11/16 10-7/16
19-11/16 10-7/16
19-11/16 10-7/16

275
275
275

441
441
441

499
499
499

265
265
265

124
124
124

FR95
FR95
FR95

70A
72A
72B

IndoorOutdoor

— Y48G28T15N
— Y48J28T15N
— Y48D28T15N

2,100.
2,100.
2,100.

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
723
765

323
371
397

191
299
580

FR243
FR244
FR245

84A
84A
84A

IndoorOutdoor

— Y48M28T30N
— Y48M28T45N
— Y48M28T75N 

4,000.
5,000.
6,800.

15
30
37.5

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
239
310

635
765
765

511
511
511

359
359
359

69
108
140

FR909
FR910A
FR911A

280B
280B
280B

WS31
WS31
WS31

350. V48M28T15B
350. V48M28T30K
350. V48M28T37K

1,350.
1,725.
2,040.

45
50
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
480

765
1000
1000

511
663
663

359
485
486

140
217
217

FR912A
FR913B
FR914B

280B
280B
280B

WS31
WS33
WS33

350. V48M28T45K
350. V48M28T50J
350. V48M28T75J

2,100.
2,920.
2,970.

112.5
150
225

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

663
712
793

486
585
616

272
344
499

FR915B
FR916A
FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M28T12H
350. V48M28T49K
800. V48M28T22L

4,300.
5,400.
7,900.

2@+2.5%
2@+2.5%
2@+2.5%
1@+3.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

62-1/4
75
75
68

31-1/4
44-1/2
44-1/2
64

30-1/4
36
36
45

1600
2400
2900
4350

1581
1905
1905
1727

794
1130
1130
1625

768
914
914
1143

728 FR918A
1088 FR919
1315 FR920
1972

280B
275A
275A

WS34
WS35
WS35

300
500
750
1000





4@-2.5%
4@-2.5%
4@-2.5%
1@-3.5%







800.
1,360.
1,360.
—

V48M28T33K
V48M28T55G
V48M28T77F
V48W28T11G 

10,000.
16,000.
26,000.
46,500.

Refer to your Cutler-Hammer sales office.
Floor mount only.
Not seismic qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-14

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0314]

Table 9-13. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield
Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts — Copper Windings
15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT
EPT

115
115
115
115

17-3/8
26-5/8
26-1/2
32-1/4

19-11/16
25-1/4
28-1/2
30-1/8

10-7/16
12-3/4
14-5/8
15-5/8

300
505
745
1450

441
676
673
819

499
638
723
765

265
323
371
397

136
230
339
659

FR95
FR243
FR244
FR245

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

172
300
370
550

635
765
765
1000

511
511
511
663

359
359
359
486

78
136
168
250

FR909
FR910A
FR912A
FR914B

280B
280B
280B
280B

WS31
WS31
WS31
WS33

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

39-3/8
46-1/8
56
62-1/4

26-1/8
28
31-1/4
31-1/4

19-1/8
23
24-1/4
30-1/4

675
850
1200
2150

1000
1171
1422
1581

663
712
793
794

486
585
616
768

307
386
545
977

FR915B
FR916A
FR917
FR918A

280B
280B
280B
280B

WS33
WS19
WS34
WS34

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
1@+3.5% 1@-3.5%

DT-3
DT-3
DT-3

150
150
150

75
75
68

44-1/2
44-1/2
64

36
36
45

3100 1905
3600 1905
5500 1727

1130
1130
1625

914
914
1143

275A
275A

WS35
WS35

500
750
1000

9

1409 FR919
1636 FR920
2500 

72B
84A
84A
84A



IndoorOutdoor



—
—
—
—

Y48D28T15CU
Y48M28T30CU
Y48M28T45CU
Y48M28T75CU 


2,860.
5,440.
6,800.
9,100.

350.
350.
350.
350.

V48M28T15CU
V48M28T30CU
V48M28T45CU
V48M28T75CU

2,000.
2,380.
2,890.
4,390.

350.
350.
800.
800.

V48M28T12CU
V48M28T49CU
V48M28T22CU
V48M28T33CU

6,000.
8,200.
11,030.
14,000.

1,360. V48M28T55CU
1,360. V48M28T77CU
— V48W28T11CU 

22,350.
38,000.
65,100.

480 ∆ Volts to 208Y/120 Volts Stainless Steel 
3
6
9
15

—
2@+2.5%
2@+2.5%
2@+2.5%

2@-5%
2@-2.5%
2@-2.5%
2@-2.5%

EPT
EPT
EPT
EPT

115
115
115
115

13-7/8
15-7/8
15-7/8
17-3/8

16
8-3/8
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

116
143
143
275

340
403
403
441

405
419
419
499

211
251
251
265

53
65
75
124

FR201
FR200
FR103
FR95

70A
72B
72B
72B

IndoorOutdoor

—
—
—
—

Y48G28T03SS
Y48D28T06SS
Y48D28T09SS
Y48D28T15SS

1,590.
1,935.
2,500.
3,150.

422
660
1275

676
673
819

638
723
765

323
371
397

191
299
453

FR243
FR244
FR245

84A
84A
84A

IndoorOutdoor

— Y48M28T30SS
— Y48M28T45SS
— Y48M28T75SS 


6,000.
7,500.
9,300.

480 ∆ Volts to 208Y/120 Volts Stainless Steel, Copper Windings 
15
30
45

2@+2.5% 2@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

17-3/8
26-5/8
26-1/2

19-11/16 10-7/16
25-1/4
12-3/4
28-1/2
14-5/8

300
504
745

441
676
673

499
638
723

265
323
371

136
229
338

FR95
FR243
FR244

72B
84A
84A

IndoorOutdoor

— Y48D28T15SSCU
— Y48M28T30SSCU
— Y48M28T45SSCU

3,880.
7,400.
9,250.

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8 5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70A
70A
70A
70A

IndoorOutdoor

—
—
—
—

Y48G31T03A
Y48G31T06A
Y48G31T09A
Y48G31T15A

1,590.
1,935.
2,505.
3,150.

84K
84K
84K

IndoorOutdoor

— Y48M31T30A
— Y48M31T45A
— Y48M31T75A 


4,600.
5,750.
7,150.

480 ∆ Volts to 220Y/127 Volts
3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20 1/8
20-1/8
20-1/8

14 1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280B
280B
280B

WS31
WS31
WS31

350. V48M31T15A
350. V48M31T30A
350. V48M31T45A

1,550.
2,000.
2,415.

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280B
280B
280B

WS33
WS33
WS19

350. V48M31T75A
350. V48M31T12A
350. V48M31T49A

3,415.
4,945.
6,210.

225
300
500

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100 1422
1600 1581
2400 1905

794
794
1130

616
768
914

499 FR917
280B
728 FR918A 280B
1088 FR919
275A

WS34
WS34
WS35

800. V48M31T22A
800. V48M31T33A
1,360. V48M31T55A

9,100.
11,500.
18,500.







2@-5%
2@-5%
2@-5%
2@-5%

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

Floor mount only.
Refer to your Cutler-Hammer sales office.
Not seismic qualified.
NEMA 3R, 316 stainless steel enclosure.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-15

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0315]

Table 9-14. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 240 ∆ Volts With 120 Volt Lighting Tap on B Phase 

2@-5%
2@-5%
4@-2.5%

EPT
EPT
EPT

115
115
115

13-3/8
15-7/8
15-7/8

16
16-1/2
16-1/2

8-3/8
9-7/8
9-7/8

116
143
166

339
403
403

404
419
419

211
251
251

52
64
75

FR201
FR200
FR103

74A
74A
73A

IndoorOutdoor

— Y48G24T03N 
— Y48G24T06N 
— Y48J24T09N 

1,190.
1,450.
1,870.

15
30
45

—
4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

17-3/8
26-5/8
26-1/2

19-3/4
25-1/4
28-1/2

10-1/2
12-3/4
14-5/8

275
422
660

441
676
673

499
638
723

265
323
371

124
191
299

FR95
FR243
FR244

73A
85A
85A

IndoorOutdoor

— Y48J24T15N 
— Y48M24T30N 
— Y48M24T45N 

2,350.
4,480.
5,600.

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

152
230
310
480

635
765
765
1000

511
511
511
663

359
359
359
486

69
104
140
217

FR909
FR910A
FR912A
FR914B

282B
282B
282B
282B

WS31
WS31
WS31
WS33

350.
350.
350.
350.

V48M22T15B
V48M22T30N
V48M22T45N
V48M22T75N

1,550.
2,000.
2,500.
3,420.

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

39-3/8
46-1/8
56
62-1/4

26-1/8
28-1/8
31-1/4
31-1/4

19-1/8
23
24-1/4
30-1/4

600
760
1100
1600

1000
1171
1422
1581

663
712
793
794

486
585
616
768

272
344
499
728

FR915B
FR916A
FR917
FR918A

282B
282B
282B
282B

WS33
WS19
WS34
WS34

350.
350.
800.
800.

V48M22T12N
V48M22T49N
V48M22T22N
V48M22T33N

4,900.
6,210.
9,100.
11,500.

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
1@+3.5% 1@-3.5%

DT-3
DT-3
DT-3

150
150
150

75
75
68

44-1/2
44-1/2
64

36
36
45

2400 1905
2900 1905
4350 1727

1130
1130
1625

914
914
1143

291A
291A

WS35
WS35

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

3
6
9

500
750
1000

—
—
—

1088 FR919
1315 FR920
1972 





1,360. V48M22T55N
1,360. V48M22T77N
— V48W22T11N 

18,500.
32,600.
53,500.

480 ∆ Volts to 380Y/220 Volts








3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

225
300
500

DT-3
DT-3
DT-3

150
150
150

2@-5%
2@-5%
2@-5%
2@-5%

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70R
70R
70R
70R

IndoorOutdoor

—
—
—
—

Y48G37T03A
Y48G37T06A
Y48G37T09A
Y48G37T15A

1,590.
1,935.
2,505.
3,150.

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

84A
84A
84A

IndoorOutdoor

— Y48M37T30A
— Y48M37T45A
— Y48M37T75A 

4,600.
5,750.
7,150.

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280B
280B
280B

WS31
WS31
WS31

350. V48M37T15A
350. V48M37T30A
350. V48M37T45A

1,800.
2,000.
2,500.

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280B
280B
280B

WS33
WS33
WS19

350. V48M37T75A
350. V48M37T12A
350. V48M37T49A

3,400.
4,900.
6,850.

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100 1422
1600 1581
2400 1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

280B
280B
275A

WS34
WS34
WS35

800. V48M37T22A
800. V48M37T33A
1,360. V48M37T55A

9,100.
11,500.
18,500.

Center Tap capacity limited to 5% of rated kVA.
Do not include 120 volt lighting tap.
Refer to your Cutler-Hammer sales office.
Not seismic qualified.
Floor mount only.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-16

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0316]

Table 9-15. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 380 ∆ Volts

9

3
6
9
15

—
—
—
—

30
45
75

2@-5%
2@-5%
2@-5%
2@-5%

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

74B
74B
74B
74B

IndoorOutdoor

—
—
—
—

Y48G38T03A
Y48G38T06A
Y48G38T09A
Y48G38T15A

1,590.
1,935.
2,505.
3,150.

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

85A
85A
85A

IndoorOutdoor

— Y48M38T30A
— Y48M38T45A
— Y48M38T75A 


4,600.
5,750.
7,150.

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

281B
281B
281B

WS31
WS31
WS31

350. V48M38T15A
350. V48M38T30A
350. V48M38T45A

1,500.
2,000.
2,500.

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

281B
281B
281B

WS33
WS33
WS19

350. V48M38T75A
350. V48M38T12A
350. V48M38T49A

3,400.
4,900.
6,850.

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100 1422
1600 1581
2400 1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

281B
281B
274B

WS34
WS34
WS35

800. V48M38T22A
800. V48M38T33A
1,360. V48M38T55A

9,100.
11,500.
18,500.

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

480 ∆ Volts to 416Y/240 Volts
3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

2@-5%
2@-5%
2@-5%
2@-5%

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

70A
70A
70A
70A

IndoorOutdoor

—
—
—
—

Y48G51T03A
Y48G51T06A
Y48G51T09A
Y48G51T15A

1,590.
1,935.
2,505.
3,150.

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

84E
84E
84E

IndoorOutdoor

— Y48M51T30A
— Y48M51T45A
— Y48M51T75A 


4,600.
5,750.
7,150.

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280B
280B
280B

WS31
WS31
WS31

350. V48M51T15A
350. V48M51T30A
350. V48M51T45A

2,110.
2,350.
2,940.

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280B
280B
280B

WS33
WS33
WS19

350. V48M51T75A
350. V48M51T12A
350. V48M51T49A

4,000.
5,750.
8,040.

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100 1422
1600 1581
2400 1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

280B
280B
275A

WS34
WS34
WS35

800. V48M51T22A
800. V48M51T33A
1,360. V48M51T55A

10,680.
13,500.
21,700.

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-15/16 8-5/16
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16






IndoorOutdoor

—
—
—
—

Y48G35T03A
Y48G35T06A
Y48G35T09A
Y48G35T15A

1,590.
1,935.
2,505.
3,150.

IndoorOutdoor

— Y48M35T30A
— Y48M35T45A
— Y48M35T75A 


4,600.
5,750.
7,150.

480 ∆ Volts to 440Y/254 Volts
3
6
9
15

—
—
—
—

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

26-5/8
26-1/2
32-1/4

25-1/4
28-1/2
30-1/8

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150





2@-5%
2@-5%
2@-5%
2@-5%

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201
FR200
FR103
FR95

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
819

638
724
765

324
372
397

191
299
580

FR243
FR244
FR245

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
141

FR909
FR910A
FR912A

280B
280B
280B

WS31
WS31
WS31

350. V48M35T15A
350. V48M35T30A
350. V48M35T45A

1,800.
2,000.
2,500.

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

664
664
712

486
486
585

218
273
345

FR914B
FR915B
FR916A

280B
280B
280B

WS33
WS33
WS19

350. V48M35T75A
350. V48M35T12A
350. V48M35T49A

3,400.
4,900.
6,850.

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100 1422
1600 1581
2400 1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

280B
280B

WS34
WS34
WS35

800. V48M35T22A
800. V48M35T33A
1,360. V48M35T55A

9,100.
11,500.
18,500.

84A
84A
84A



Floor mount only.
Refer to your Cutler-Hammer sales office.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-17

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0317]

Table 9-16. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 480Y/277 Volts
9
15
30
45

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5%
2@-2.5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT
EPT

115
115
115
115

15-7/8
17-3/8
26-5/8
26-1/2

16-1/2
19-3/4
25-1/4
28-1/2

9-7/8
10-1/2
12-3/4
14-5/8

166
275
422
660

403
441
676
673

419
499
638
723

251
265
323
371

75
124
191
299

FR103
FR95
FR243
FR244

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

152
230
310
480

635
765
765
1000

511
511
511
663

359
359
359
486

69
104
140
217

FR909
FR910A
FR912A
FR914B

280B
280B
280B
280B

112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%
225
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

663
712
793

486
585
616

272
344
499

FR915B
FR916A
FR917

300
500
750

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

—
—
—
—

Y48D47T09N
Y48D47T15N
Y48M47T30N
Y48M47T45N

2,170.
2,730.
5,200.
6,500.

WS31
WS31
WS31
WS33

350.
350.
350.
350.

V48M47T15B
V48M47T30N
V48M47T45G
V48M47T75F

1,830.
2,330.
2,840.
4,010.

280B
280B
280B

WS33
WS19
WS34

350. V48M47T12E
350. V48M47T49F
800. V48M47T22F

5,810.
7,290.
10,670.

280B
275A
275A

WS34
WS35
WS35

800. V48M47T33E
1,360. V48M47T55F
1,360. V48M47T77A

13,500.
21,600.
35,100.

72C
72C
84D
84D

IndoorOutdoor

600 ∆ Volts to 208Y/120 Volts
9
15
30
45

—
—
2@+2.5%
2@+2.5%

2@-5%
2@-5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT
EPT

115
115
115
115

15-7/8
17-3/8
26-5/8
26-1/2

16-1/2
19-3/4
25-1/4
28-1/2

9-7/8
10-1/2
12-3/4
14-5/8

166
275
422
660

403
441
676
673

419
499
638
723

251
265
323
371

75
124
191
299

FR103
FR95
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
140

FR909
FR910A
FR912A

280A
280A
280A

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

486
486
585

217
272
344

FR914B
FR915B
FR916A

225
300
500

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100 1422
1600 1581
2400 1905

793
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

Y60G28T09N
Y60G28T15N
Y60M28T30N
Y60M28T45N

2,000.
2,520.
4,800.
6,000.

WS31
WS31
WS31

350. V60M28T15A
350. V60M28T30N
350. V60M28T45H

2,390.
2,390.
2,990.

280A
280A
280A

WS33
WS33
WS19

350. V60M28T75G
350. V60M28T12F
350. V60M28T49F

4,061.
5,860.
8,190.

280A
280A
275C

WS34
WS34
WS35

800. V60M28T22G
800. V60M28T33F
1,360. V60M28T55A

10,870.
13,740.
22,100.

— Y60M24T30N
— Y60M24T45N

5,000.
6,250.

70B
70B
84B
84B

IndoorOutdoor

—
—
—
—

600 ∆ Volts to 240 ∆ Volts
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT

115
115

26-5/8
26-1/2

25-1/4
28-1/2

12-3/4
14-5/8

422
660

676
673

638
723

323
371

191
299

FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69
104
140

FR909
FR910A
FR912A

281A
281A
281A

WS31
WS31
WS31

350. V60M24T15A
350. V60M24T30A
350. V60M24T45H

2,390.
2,390.
2,990.

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

486
486
585

217
272
344

FR914B
FR915B
FR916A

281A
281A
281A

WS33
WS33
WS19

350. V60M24T75G
350. V60M24T12E
350. V60M24T49F

4,061.
5,860.
8,190.

225
300
500

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100 1422
1600 1581
2400 1905

793
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

281A
281A
274A

WS34
WS34
WS35

800. V60M24T22G
800. V60M24T33F
1,360. V60M24T55A

10,870.
13,740.
22,100.

18-7/8
25
29

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

85B
85B

IndoorOutdoor

2400 ∆ Volts to 208Y/120 Volts
3
6
9

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

EPT
EPT
EPT

115
115
115

10
11
12

6-1/2
7-1/2
8-1/2

115
160
210

254
279
305

479
635
737

165
191
216

52
73
95

FR102
FR97
FR96

65B
65B
65B

Recomended
Indoor
Only

— Y42D28T03N 

Y42D28T06N 

Y42D28T09N 


5,630.
6,450.
8,070.

15
30

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

EPT
EPT

115
115

18-1/2
21
10-1/2
27-11/16 20-11/16 12

340
475

470
703

533
525

267
305

154
216

FR195
FR196

65B
65B

Recomended
Indoor
Only

— Y42D28T15N 

— Y42D28T30N 


10,200.
13,400.

45
2@+2.5% 2@-2.5%
75
2@+2.5% 2@-2.5%
112.5 2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

32-1/2
32-1/2
36

30
30
33

24
24
26

460
620
800

826
902
914

762
762
838

610
610
660

209
282
364









Recomended
Indoor
Only

— V42D28T45G 
— V42D28T75H 
— V42D28T12H 

7,500.
8,950.
9,450.

150
225
300

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

36
50
51

33
39-3/4
39-3/4

26
37
37

980
914
1450 1270
1620 1010

838
1010
1010

660
940
940

445
659
736









Recomended
Indoor
Only

— V42D28T49K 
— V42D28T22J 
— V42D28T33J 

11,400.
15,600.
21,000.

500
750
1000

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

59
75
90

48-3/4
44-1/2
69

41
36
42

2400 1238
3300 1905
4500 2286

1238
1130
1753

1041
914
1067



Recomended
Indoor
Only

— V42D28T55G 
— V42D28T77 
— V42D28T11 

32,000.
42,000.
52,000.







1091 
1498 FR920
2043 FR922

266A
266A

No UL label. Contact your local Cutler-Hammer sales office if UL label is required.
Refer to your Cutler-Hammer sales office.
NEMA 3R enclosure and/or UL label available at an additional cost. Specify at time of order entry if required.
Not seismic qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-18

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0318]

Table 9-17. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

2400 ∆ Volts to 480Y/277 Volts 

45
2@+2.5% 2@-2.5%
75
2@+2.5% 2@-2.5%
112.5 2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

32-1/2
32-1/2
36

30
30
33

24
24
26

460
620
800

826
902
914

762
762
838

610
610
660

209
282
364









Recommended
Indoor
Only

— V42D47T45G
— V42D47T75F
— V42D47T12F

7,500.
8,950.
9,450.

150
225
300

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

36
50
51

33
39-3/4
39-3/4

26
37
37

980
1450
1620

914
1270
1010

838
1010
1010

660
940
940

445
659
736









Recommended
Indoor
Only

— V42D47T49G
— V42D47T22H
— V42D47T33G

11,400.
15,600.
21,000.

500
750
1000

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150




59

48-3/4

41

2400

1238

1238

1041

1091









Recommended
Indoor
Only

— V42D47T55H
— V42D47T77
— V42D47T11A

32,000.
42,000.
52,000.

18-7/8
25
29






















4160 ∆ Volts to 208Y/120 Volts
3
6
9

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

EPT
EPT
EPT

115
115
115

10
11
12

6-1/2
7-1/2
8-1/2

115
160
210

254
279
305

479
635
737

165
191
216

52
73
95

FR102
FR97
FR96

65C
65C
65C

Recommended
Indoor
Only

— Y46D28T03N 
— Y46D28T06N 
— Y46D28T09N 

5,800.
6,450.
8,070.

15
30

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

EPT
EPT

115
115

18-1/2
21
10-1/2
27-11/16 20-11/16 12

340
475

470
703

533
525

267
305

154
216

FR195
FR196

65C
65C

Recommended
Indoor
Only

— Y46D28T15N 

— Y46D28T30N 


10,200.
13,400.

45
75
112.5
150

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5%
2@-2.5%
2@-2.5%
2@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

32-1/2
32-1/2
36
36

30
30
33
33

24
24
26
26

460
620
800
980

826
902
914
914

762
762
838
838

610
610
660
660

209
282
364
445











Recommended
Indoor
Only

—
—
—
—

V46D28T45H 

V46D28T75H 

V46D28T12H 

V46D28T49K 


7,500.
8,950.
9,450.
11,400.

225
300
500

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

50
51
59

39-3/4
39-3/4
48-3/4

37
37
41

1450
1620
2400

1270
1010
1238

1010
1010
1238

940
940
1041

659
736
1091









Recommended
Indoor
Only

— V46D28T22J 

— V46D28T33J 

— V46D28T55H 


15,600.
21,000.
32,000.

750
1000
1500

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150









































Recommended
Indoor
Only

— V46D28T77 

— V46D28T11 

— V46D28T14 


42,000.
52,000.
65,000.

9

4160 ∆ Volts to 240 ∆ Volts 

45
2@+2.5% 2@-2.5%
75
2@+2.5% 2@-2.5%
112.5 2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

32-1/2
32-1/2
36

30
30
33

24
24
26

460
620
800

826
902
914

762
762
838

610
610
660

209
282
364









Recommended
Indoor
Only

— V46D24T45F
— V46D24T75F
— V46D24T12F

7,500.
8,950.
9,450.

150
225
300

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

36
50
51

33
39-3/4
39-3/4

26
37
37

980
1450
1620

914
1270
1010

838
1010
1010

660
940
940

445
659
736









Recommended
Indoor
Only

— V46D24T49H
— V46D24T22G
— V46D24T33G

11,400.
15,600.
21,000.

500
750
1000

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150




59

48-3/4

41

2400

1238

1238

1041

1091

—

—

Recommended
Indoor
Only

— V46D24T55B
— V46D24T77
— V46D24T11A

32,000.
42,000.
52,000.




























4160 ∆ Volts to 480Y/277 Volts 

45
2@+2.5% 2@-2.5%
75
2@+2.5% 2@-2.5%
112.5 2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

32-1/2
32-1/2
36

30
30
33

24
24
26

460
620
800

826
902
914

762
762
838

610
610
660

209
282
364









Recommended
Indoor
Only

— V46D47T45G
— V46D47T75G
— V46D47T12G

7,500.
8,950.
9,450.

150
225
300

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150

36
50
51

33
39-3/4
39-3/4

26
37
37

980
1450
1620

914
1270
1010

838
1010
1010

660
940
940

445
659
736









Recommended
Indoor
Only

— V46D47T49J
— V46D47T22H
— V46D47T33H

11,400.
15,600.
21,000.

500
750
1000

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3
DT-3

150
150
150




59

48-3/4

41

2400

1238

1238

1041

1091











Recommended
Indoor
Only

— V46D47T55H
— V46D47T77
— V46D47T11

32,000.
42,000.
52,000.

1500

2@+2.5% 2@-2.5%

DT-3

150























— V46D47T14F

65,000.

























NEMA 3R enclosure and/or UL label available at additional cost. Specify at time of order entry if required.
Not seismic qualified.
Refer to your Cutler-Hammer sales office.
No UL label.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-19

November 2003

Three-Phase, Types EPT, DT-3, 50/60 Hz

Vol. 1, Ref. No. [0319]

Three-Phase, Types EPT,
DT-3, 50/60 Hz

Application Description

Options and Accessories

The basic purpose of a transformer
is voltage transformation as near as
practically possible to the load for
economy and distribution of power.
Typical loads for dry-type distribution
transformers include lighting, heating,
air conditioners, fans and machine
tools. Such loads are found in commercial, institutional, industrial and
residential structures.

Please refer to Page 9-120.

Features, Benefits
and Functions
Type EPT Encapsulated

Product Description
Type EPT
■
■
■
■
■
■
■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC rise
standard.
Available in ratings through 75 kVA
and 4160 volts primary.

Type DT-3
■
■

■
■
■

Ventilated, NEMA 2 enclosure
standard.
Suitable for indoor applications,
outdoors when weathershields are
also installed.
Upright mounting only.
220ºC Insulation System, 150ºC rise
standard.
Available in three-phase ratings
15 – 1500 kVA and up to 4160 volts
primary.

■

UL listed.
■ 60 Hz operation standard,
50/60 Hz operation available.
■ Short-term overload capability
as required by ANSI.
■ Meet NEMA ST-20 sound levels.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution and control transformers are built
and tested in accordance with applicable NEMA, ANSI and IEEE Standards.
All 600 volt class transformers are UL
listed unless otherwise noted.

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hertz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one hour;
and 125% load for four hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
General Purpose Transformers

9-20

November 2003

Three-Phase, Types EPT, DT-3, 50/60 Hz
Insulation System and Temperature Rise

Sound Levels

Series-Multiple Windings

Industry standards classify insulation
systems and rise as shown below:

All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to
be installed in an area where sound
may be a concern.

Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or
240 with a 120 mid-point.

Table 9-18. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

9

Vol. 1, Ref. No. [0320]

Enclosures
Eaton’s Cutler-Hammer ventilated
transformers, Type DT-3, utilize a
NEMA 2 rated (drip-proof) enclosure
as standard, and are rated NEMA 3R
with the addition of weathershields.
Cutler-Hammer encapsulated transformers, Type EPT, utilize a NEMA 3R
rated enclosure as standard.

Table 9-19. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64




Technical Data
and Specifications
Please refer to Page 9-122.

Applies to general purpose ventilated
transformers only.

Winding Terminations
Primary and secondary windings are
terminated in the wiring compartment.
Encapsulated units have copper leads
or stabs brought out for connections.
Ventilated transformers have leads
brought out to aluminum pads that
are pre-drilled to accept Cu/Al lugs.
Lugs are not supplied with these
transformers. The Cutler-Hammer
business recommends external cables
be rated 90°C (sized at 75°C ampacity)
for encapsulated designs and 75°C for
ventilated designs.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose Transformers

9-21

November 2003

Three-Phase, Types EPT, DT-3, 50/60 Hz

Vol. 1, Ref. No. [0321]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-20. Three-Phase Selection Information — Types EPT, DT-3, 50/60 Hz
Note: For 50/60 Hz single-phase transformers contact your local Cutler-Hammer sales office.
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt. Frame Wiring
Weathershield Style
Lbs. H
kg
Diagram Catalog Price Number
W
D
Number Number U.S. $

Price
U.S. $

380 ∆ Volts to 208Y/120 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75 FR200
86 FR103
125 FR95

70D
70D
70D

IndoorOutdoor

— Y38G28T03X
— Y38G28T06X
— Y38G28T09X

1,600.
1,950.
2,525.

70D
84W
84W

IndoorOutdoor

— Y38G28T15X
— Y38M28T30X
— Y38M28T45X

3,175.
5,800.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159 FR96
223 FR243
359 FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

280L
280L
280L

WS31
WS31
WS33

350. V38M28T15X
350. V38M28T30X
350. V38M28T45X

2,260.
2,520.
3,150.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
30-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

280L
280L
280L

WS33
WS19
WS34

350. V38M28T75X
350. V38M28T12X
800. V38M28T49X

4,280.
6,170.
9,100.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

280L
280L

WS34
WS35
WS35

800. V38M28T22X
1,360. V38M28T33X
1,360. V38M28T55X

11,500.
18,300.
23,100.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16




380 ∆ Volts to 220Y/127 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

165
190
275

403
403
442

419
419
500

251
251
265

75 FR200
86 FR103
125 FR95

70F
70F
70F

IndoorOutdoor

— Y38G31T03X
— Y38G31T06X
— Y38G31T09X

1,540.
1,860.
2,420.

70F
84H
84H

IndoorOutdoor

— Y38G31T15X
— Y38M31T30X
— Y38M31T45X

3,040.
5,800.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159 FR96
223 FR243
359 FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

280L
280L
280L

WS31
WS31
WS33

350. V38M31T15X
350. V38M31T30X
350. V38M31T45X

2,270.
2,520.
3,150.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

280L
280L
280L

WS33
WS19
WS34

350. V38M31T75X
350. V38M31T12X
800. V38M31T49X

4,300.
6,170.
8,570.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

280L
275H
275H

WS34
WS35
WS35

800. V38M31T22X
1,360. V38M31T33X
1,360. V38M31T55X

11,375.
18,300.
23,100.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

380 ∆ Volts to 380Y/220 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

165
190
275

403
403
442

419
419
500

251
251
265

75 FR200
86 FR103
125 FR95

70D
70D
70D

IndoorOutdoor

— Y38G37T03X
— Y38G37T06X
— Y38G37T09X

1,740.
2,100.
2,740.

70D
84H
84H

IndoorOutdoor

— Y38G37T15X
— Y38M37T30X
— Y38M37T45X

3,440.
6,550.
8,190.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159 FR96
223 FR243
359 FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

280L
280L
280L

WS31
WS31
WS33

350. V38M37T15X
350. V38M37T30X
350. V38M37T45X

2,380.
3,040.
3,700.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

280L
280L
280L

WS33
WS19
WS34

350. V38M37T75X
350. V38M37T12X
800. V38M37T49X

5,240.
7,580.
9,525.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

280L
280L

WS34
WS35
WS35

800. V38M37T22X
1,360. V38M37T33X
1,360. V38M37T55X

13,930.
17,640.
28,220.







Refer to your Cutler-Hammer sales office.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-22

November 2003

Three-Phase, Types EPT, DT-3, 50/60 Hz

Vol. 1, Ref. No. [0322]

Table 9-21. Three-Phase Selection Information — Types EPT, DT-3, 50/60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

380 ∆ Volts to 416Y/240 Volts, 50/60 Hz
3
6
9

9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95








IndoorOutdoor

— Y38G51T03X
— Y38G51T06X
— Y38G51T09X

1,685.
2,440.
3,160.

— Y38G51T15X
— Y38M51T30X
— Y38M51T45X

3,970.
7,560.
9,450.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244








IndoorOutdoor

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280L
280L
280L

WS31
WS31
WS33

350. V38M51T15X
350. V38M51T30X
350. V38M51T45X

2,360.
3,020.
3,675.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280L
280L
280L

WS33
WS19
WS34

350. V38M51T75X
350. V38M51T12X
800. V38M51T49X

5,200.
7,525.
9,450.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728
1088
1315

FR918A
FR919
FR920






280L

WS34
WS35
WS35

800. V38M51T22X
1,360. V38M51T33X
1,360. V38M51T55X

13,820.
17,500.
28,000.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

400 ∆ Volts to 208Y/120 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

66E
66E
66E

IndoorOutdoor

— Y39G28T03X
— Y39G28T06X
— Y39G28T09X

1,540.
1,860.
2,525.

66E
84Z
84Z

IndoorOutdoor

— Y39G28T15X
— Y39M28T30X
— Y39M28T45X

3,175.
5,200.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280K
280K
280K

WS31
WS31
WS33

350. V39M28T15X
350. V39M28T30X
350. V39M28T45X

2,380.
3,040.
3,700.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280K
280K
280K

WS33
WS19
WS34

350. V39M28T75X
350. V39M28T12X
800. V39M28T49X

5,230.
7,570.
9,500.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728
1088
1315

FR918A
FR919
FR920






280K

WS34
WS35
WS35

800. V39M28T22X
1,360. V39M28T33X
1,360. V39M28T55X

13,900.
17,600.
28,160.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

400 ∆ Volts to 400Y/231 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

70U
70U
70U

IndoorOutdoor

— Y39G34T03X
— Y39G34T06X
— Y39G34T09X

1,740.
2,100.
2,740.

70U
84V
84V

IndoorOutdoor

— Y39G34T15X
— Y39M34T30X
— Y39M34T45X

3,440.
5,200.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280K
280K
280K

WS31
WS31
WS33

350. V39M34T15X
350. V39M34T30X
350. V39M34T45X

2,380.
3,040.
3,700.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280K
280K
280K

WS33
WS19
WS34

350. V39M34T75X
350. V39M34T12X
800. V39M34T49X

5,230.
7,570.
9,500.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728
1088
1315

FR918A
FR919
FR920






280K

WS34
WS35
WS35

800. V39M34T22X
1,360. V39M34T33X
1,360. V39M34T55X

13,900.
17,600.
28,160.




Refer to your Cutler-Hammer sales office.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-23

November 2003

Three-Phase, Types EPT, DT-3, 50/60 Hz

Vol. 1, Ref. No. [0323]

Table 9-22. Three-Phase Selection Information — Types EPT, DT-3, 50/60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt. Frame
Lbs. H
kg
W
D

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

416 ∆ Volts to 208Y/120 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75 FR200
86 FR103
125 FR95

70V
70V
70V

IndoorOutdoor

— Y43G28T03X
— Y43G28T06X
— Y43G28T09X

1,600.
1,950.
2,525.

70V
84I
84I

IndoorOutdoor

— Y43G28T15X
— Y43M28T30X
— Y43M28T45X

3,175.
5,800.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159 FR96
223 FR243
359 FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

280P
280P
280P

WS31
WS31
WS33

350. V43M28T15X
350. V43M28T30X
350. V43M28T45X

2,260.
2,520.
3,150.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

280P
280P
280P

WS33
WS19
WS34

350. V43M28T75X
350. V43M28T12X
800. V43M28T49X

4,570.
6,230.
8,570.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920






280P

WS34
WS35
WS35

800. V43M28T22X
1,360. V43M28T33X
1,360. V43M28T55X

11,450.
18,300.
23,400.

416 ∆ Volts to 220 ∆ Volts With 110 Volt Lighting Tap on B Phase, 50/60 Hz 
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

282J
282J
282J

WS31
WS31
WS33

350. V43M26T15X
350. V43M26T30X
350. V43M26T45X

1,960.
2,520.
3,045.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

282J
282J
282J

WS33
WS19
WS34

350. V43M26T75X
350. V43M26T12X
800. V43M26T49X

4,310.
6,235.
7,830.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

282J

WS34
WS35
WS35

800. V43M26T22X
1,360. V43M26T33X
1,360. V43M26T55X

11,450.
14,500.
23,200.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75 FR200
86 FR103
125 FR95






416 ∆ Volts to 220Y/127 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

70V
70V
70V

IndoorOutdoor

— Y43G31T03X
— Y43G31T06X
— Y43G31T09X

1,550.
1,890.
2,340.

70V

IndoorOutdoor

— Y43G31T15X
— Y43M31T30X
— Y43M31T45X

3,050.
5,800.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159 FR96
223 FR243
359 FR244






15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

280S
280S
280S

WS31
WS31
WS33

350. V43M31T15X
350. V43M31T30X
350. V43M31T45X

2,260.
2,520.
3,150.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

280S
280S
280S

WS33
WS19
WS34

350. V43M31T75X
350. V43M31T12X
800. V43M31T49X

4,570.
6,230.
8,570.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

280S

WS34
WS35
WS35

800. V43M31T22X
1,360. V43M31T33X
1,360. V43M31T55X

11,450.
18,300.
23,400.

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75 FR200
86 FR103
125 FR95






416 ∆ Volts to 240 ∆ Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

74I
74I
74I

IndoorOutdoor

— Y43G24T03X
— Y43G24T06X
— Y43G24T09X

1,550.
1,890.
2,430.

74I

IndoorOutdoor

— Y43G24T15X
— Y43M24T30X
— Y43M24T45X

3,060.
5,820.
7,280.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159 FR96
223 FR243
359 FR244






15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

281AD
281AD
281AD

WS31
WS31
WS33

350. V43M24T15X
350. V43M24T30X
350. V43M24T45X

1,960.
2,520.
3,045.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

281AD
281AD
281AD

WS33
WS19
WS34

350. V43M24T75X
350. V43M24T12X
800. V43M24T49X

4,310.
6,235.
7,830.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

281AD

WS34
WS35
WS35

800. V43M24T22X
1,360. V43M24T33X
1,360. V43M24T55X

11,450.
14,500.
23,200.










Refer to your Cutler-Hammer sales office.
Center Tap capacity limited to 5% of rated kVA.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
General Purpose Transformers

9-24

November 2003

Three-Phase, Types EPT, DT-3, 50/60 Hz

Vol. 1, Ref. No. [0324]

Table 9-23. Three-Phase Selection Information — Types EPT, DT-3, 50/60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Dimensions (Inches)
Type °C
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Weathershield Style
Wiring
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

416 ∆ Volts to 416Y/240 Volts, 50/60 Hz
3
6
9

9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

66F
66F
66F

IndoorOutdoor

— Y43G51T03X
— Y43G51T06X
— Y43G51T09X

1,550.
1,890.
2,340.

66F
84J
84J

IndoorOutdoor

— Y43G51T15X
— Y43M51T30X
— Y43M51T45X

3,050.
5,800.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR195
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280S
280S
280S

WS31
WS31
WS33

350. V43M51T15X
350. V43M51T30X
350. V43M51T45X

2,110.
2,350.
2,940.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280S
280S
280S

WS33
WS19
WS34

350. V43M51T75X
350. V43M51T12X
800. V43M51T49X

4,260.
5,800.
7,980.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728
1088
1315

FR918A
FR919
FR920

280S
275N
275N

WS34
WS35
WS35

800. V43M51T22X
1,360. V43M51T33X
1,360. V43M51T55X

10,660.
17,040.
21,790.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

70A
70A
70A

IndoorOutdoor

— Y48G28T03X
— Y48G28T06X
— Y48G28T09X

1,340.
1,630.
2,110.

70A
84A
84A

IndoorOutdoor

— Y48G28T15X
— Y48M28T30X
— Y48M28T45X

2,650.
5,200.
6,500.

480 ∆ Volts to 208Y/120 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M28T15X
350. V48M28T30X
350. V48M28T45X

1,720.
2,175.
2,650.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M28T75X
350. V48M28T12X
800. V48M28T49X

3,750.
6,170.
6,810.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728
1088
1315

FR918A
FR919
FR920

280B
275A
275A

WS34
WS35
WS35

800. V48M28T22X
1,360. V48M28T33X
1,360. V48M28T55X

9,900.
12,800.
20,160.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

70A
70A
70A

IndoorOutdoor

— Y48G31T03X
— Y48G31T06X
— Y48G31T09X

2,000.
2,440.
3,160.

70A
84K
84K

IndoorOutdoor

— Y48G31T15X
— Y48M31T30X
— Y48M31T45X

3,970.
5,800.
7,250.

480 ∆ Volts to 220Y/127 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M31T15X
350. V48M31T30X
350. V48M31T45X

1,960.
2,520.
3,060.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M31T75X
350. V48M31T12X
800. V48M31T49X

4,310.
6,230.
7,850.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728
1088
1315

FR918A
FR919
FR920

280B
275A
275A

WS34
WS35
WS35

800. V48M31T22X
1,360. V48M31T33X
1,360. V48M31T55X

11,375.
14,500.
23,100.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

480 ∆ Volts to 380Y/220 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

70R
70R
70R

IndoorOutdoor

— Y48G37T03X
— Y48G37T06X
— Y48G37T09X

2,000.
2,440.
3,160.

70R
70R

IndoorOutdoor

— Y48G37T15X
— Y48M37T30X
— Y48M37T45X

3,970.
5,800.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244




15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M37T15X
350. V48M37T30X
350. V48M37T45X

2,270.
2,520.
3,150.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M37T75X
350. V48M37T12X
800. V48M37T49X

4,300.
6,175.
8,570.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728
1088
1315

FR918A
FR919
FR920

280B
275A
275A

WS34
WS35
WS35

800. V48M37T22X
1,360. V48M37T33X
1,360. V48M37T55X

11,375.
18,300.
23,100.




Refer to your Cutler-Hammer sales office.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
General Purpose Transformers

9-25

November 2003

Three-Phase, Types EPT, DT-3, 50/60 Hz

Vol. 1, Ref. No. [0325]

Table 9-24. Three-Phase Selection Information — Types EPT, DT-3, 50/60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm)
Lbs. H
W
D

Wt.
kg

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 400Y/231 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

70A
70A
70A

IndoorOutdoor

— Y48G34T03X
— Y48G34T06X
— Y48G34T09X

2,000.
2,440.
3,160.

70A

IndoorOutdoor

— Y48G34T15X
— Y48M34T30X
— Y48M34T45X

3,970.
5,800.
7,250.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244






15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M34T15X
350. V48M34T30X
350. V48M34T45X

2,270.
2,520.
3,150.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M34T75X
350. V48M34T12X
800. V48M34T49X

4,300.
6,170.
8,570.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

280B

WS34
WS35
WS35

800. V48M34T22X
1,360. V48M34T33X
1,360. V48M34T55X

11,375.
14,375.
23,050.

16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

728 FR918A
1089 FR919
1315 FR920






480 ∆ Volts to 480Y/277 Volts, 50/60 Hz
3
6
9

—
—
—

2@-5%
2@-5%
2@-5%

EPT
EPT
EPT

115
115
115

15-7/8
15-7/8
17-3/8

165
190
275

403
403
442

419
419
500

251
251
265

75
86
125

FR200
FR103
FR95

70L
70L
70L

IndoorOutdoor

— Y48G47T03X
— Y48G47T06X
— Y48G47T09X

2,000.
2,440.
3,160.

70L
84D
84D

IndoorOutdoor

— Y48G47T15X
— Y48M47T30X
— Y48M47T45X

3,970.
6,550.
8,190.

15
30
45

—
2@-5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

EPT
EPT
EPT

115
115
115

15-15/16 25-3/4
26-5/8
25-1/4
26-1/2
28-1/2

8-3/8
12-3/4
14-5/8

350
490
790

405
676
673

654
638
724

213
324
372

159
223
359

FR96
FR243
FR244

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230 765
310 765
480 1000

511
511
664

359
359
486

104
141
218

FR910A
FR912A
FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M47T15X
350. V48M47T30X
350. V48M47T45X

2,305.
2,935.
3,575.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 1000
760 1171
1100 1422

664
712
794

486
585
616

273
345
499

FR915B
FR916A
FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M47T75X
350. V48M47T12X
800. V48M47T49X

5,050.
7,320.
9,180.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600 1581
2400 1905
2900 1905

794
1130
1130

768
914
914

728 FR918A
1089 FR919
1315 FR920

280B
275A
275A

WS34
WS35
WS35

800. V48M47T22X
1,360. V48M47T33X
1,360. V48M47T55X

13,440.
17,000.
27,200.




Refer to your Cutler-Hammer sales office.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Electrostatically Shielded Transformers

9-26

November 2003

Single- and Three-Phase Types EP, DS-3, EPT, DT-3, 60 Hz

Single- and Three-Phase,
Types EP, DS-3, EPT, DT-3, 60 Hz

Type DT-3

9

Product Description
Types EP, EPT
■
■
■
■
■
■
■

■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC
rise standard.
Available in single-phase ratings
through 37.5 kVA and 4160 volts
primary (EP).
Available in three-phase ratings
through 75 kVA and 4160 volts
primary (EPT).

Types DS-3, DT-3
■
■

■
■
■

■

Ventilated, NEMA 2 enclosure
standard.
Suitable for indoor applications,
outdoors when weathershields are
also installed.
Upright mounting only.
220ºC Insulation System, 150ºC
rise standard.
Available in single-phase ratings
15 – 167 kVA and up to 4160 volts
primary (DS-3).
Available in three-phase ratings
15 – 1500 kVA and up to 4160 volts
primary (DT-3).







Vol. 1, Ref. No. [0326]

Application Description

Options and Accessories

Electrostatically shielded transformers
are used to protect sensitive electrical
equipment from undesirable high frequency signals commonly generated
by lighting, switching surges, motors,
and SCRs feeding noise back into the
line. An electrostatic shield, consisting
of a single turn of aluminum foil placed
between the primary and secondary
winding, is used to provide from
30 to 70 dB attenuation of wide band
line-to-ground (common mode) noise.

Please refer to Page 9-120.

Typical uses of shielded isolation
transformers include:

Overload Capability

■

Suppression of transients and noise
which travels from its source to the
sensitive load equipment.
■ Suppression of noise and transients
at the point where the noise or
transients are originating, thus
preventing them from backfeeding
from the source to the feeders.
■ Transform one voltage level to
another.
■ Isolate one circuit from another.

Features, Benefits
and Functions
■

UL listed.
■ 60 Hz operation standard,
50/60 Hz operation available.
■ Short-term overload capability
as required by ANSI.
■ Meet NEMA ST-20 sound levels.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

For more information visit: www.cutler-hammer.eaton.com

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hertz operation. Transformers
required for other frequencies are
available and must be specifically
designed.
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one hour;
and 125% load for four hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-25. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer ventilated
transformers, Types DS-3 and DT-3
utilize a NEMA 2 rated (drip-proof)
enclosure as standard, and are rated
NEMA 3R with the addition of
weathershields. Cutler-Hammer
encapsulated transformers, Types
EP and EPT, utilize a NEMA 3R rated
enclosure as standard.

CA08101001E

Transformers
Electrostatically Shielded Transformers

9-27

November 2003

Single- and Three-Phase, Types EP, 60 Hz

Vol. 1, Ref. No. [0327]

Sound Levels

Series-Multiple Windings

Table 9-26. Average Sound Levels

All Eaton’s Cutler-Hammer 600 volt
class general purpose dry-type distribution transformers are designed to
meet NEMA ST-20 sound levels listed
here. These are the sound levels measured in a soundproof environment.
Actual sound levels measured at an
installation will likely be higher due to
electrical connections and environmental conditions. Lower sound levels
are available and should be specified
when the transformer is going to
be installed in an area where sound
may be a concern.

Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X 240
winding can be connected for either
120 (parallel) or 240 (series), but a
120/240 winding can be connected
for 120 (parallel), or 240 (series), or
240 with a 120 mid-point.

NEMA ST-20 Average Sound Level in dB
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Winding Terminations
Primary and secondary windings are
terminated in the wiring compartment.
Encapsulated units have copper leads or
stabs brought out for connections. Ventilated transformers have leads brought
out to aluminum pads that are predrilled to accept Cu/Al lugs. Lugs are not
supplied with these transformers. The
Cutler-Hammer business recommends
external cables be rated 90°C (sized at
75°C ampacity) for encapsulated
designs and 75°C for ventilated designs.

Technical Data
and Specifications
Please refer to Page 9-122.

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-27. Single-Phase Selection Information — Types EP, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm)
Lbs. H
W
D

Wt.
kg

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

120 x 240 Volts to 120/240 Volts
3
5
7.5
10
15
25

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8 7-3/4
16
10-3/8
16
10-3/8

8
9-7/8
9-7/8

65
113
123

359
406
406

197
263
263

203
251
251

29
51
55

FR176
FR177
FR178

90B
90B
90B

IndoorOutdoor

— S10N11E03N
— S10N11E05N
— S10N11E07N

1,155.
1,560.
2,010.

—
—
—

—
—
—

EP
EP
EP

115
115
115

19
13-3/8 10-1/2 193
19
13-3/8 10-1/2 216
22-3/8 16-3/8 14-1/8 375

482
482
568

339
339
416

266
266
359

87
98
170

FR179
FR180
FR182

90B
90B
90B

IndoorOutdoor

— S10N11E10N
— S10N11E15N
— S10N11E25N

2,450.
3,350.
4,800.

120 Volts to 120 Volts
3
5
7.5
10
15
25

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8 7-3/4
16
10-3/8
16
10-3/8

8
9-7/8
9-7/8

65
113
123

359
406
406

197
263
263

203
251
251

29
51
55

FR176
FR177
FR178

77A
77A
77A

IndoorOutdoor

— S12N12E03N
— S12N12E05N
— S12N12E07N

1,155.
1,560.
2,010.

—
—
—

—
—
—

EP
EP
EP

115
115
115

19
13-3/8 10-1/2 193
19
13-3/8 10-1/2 216
22-3/8 16-3/8 14-1/8 375

482
482
568

339
339
416

266
266
359

87
98
170

FR179
FR180
FR182

77A
77A
77A

IndoorOutdoor

— S12N12E10N
— S12N12E15N
— S12N12E25N

2,450.
3,350.
4,800.

208 Volts to 120/240 Volts
3
5
7.5
10
15
25

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8 7-3/4
16
10-3/8
16
10-3/8

8
9-7/8
9-7/8

65
113
123

359
406
406

197
263
263

203
251
251

29
51
55

FR176
FR177
FR178

578A
578A
578A

IndoorOutdoor

— S29N11E03N
— S29N11E05N
— S29N11E07N

1,320.
1,950.
2,585.

—
—
—

—
—
—

EP
EP
EP

115
115
115

19
13-3/8 10-1/2 193
19
13-3/8 10-1/2 216
22-3/8 16-3/8 14-1/8 375

482
482
568

339
339
416

266
266
359

87
98
170

FR179
FR180
FR182

578A
578A
578A

IndoorOutdoor

— S29N11E10N
— S29N11E15N
— S29N11E25N

3,100.
3,650.
5,200.

208 Volts to 208 Volts
3
5
7.5
10
15
25

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8 7-3/4
16
10-3/8
16
10-3/8

8
9-7/8
9-7/8

65
113
123

359
406
406

197
263
263

203
251
251

29
51
55

FR176
FR177
FR178

77B
77B
77B

IndoorOutdoor

— S29N29E03N
— S29N29E05N
— S29N29E07N

1,320.
1,950.
2,585.

—
—
—

—
—
—

EP
EP
EP

115
115
115

19
13-3/8 10-1/2 193
19
13-3/8 10-1/2 216
22-3/8 16-3/8 14-1/8 375

482
482
568

339
339
416

266
266
359

87
98
170

FR179
FR180
FR182

77B
77B
77B

IndoorOutdoor

— S29N29E10N
— S29N29E15N
— S29N29E25N

3,100.
3,350.
5,200.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Electrostatically Shielded Transformers

9-28

November 2003

Single-Phase, Types EP, DS-3, 60 Hz

Vol. 1, Ref. No. [0328]

Table 9-28. Single-Phase Selection Information — Types EP, DS-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm)
Lbs. H
W
D

Wt.
kg

Frame Wiring
Weathershield
Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

240 Volts to 240 Volts
3
5
7.5
10
15
25

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8 7-3/4
16
10-3/8
16
10-3/8

8
65
9-7/8 113
9-7/8 123

359
406
406

197
263
263

203
251
251

29
51
55

FR176
FR177
FR178

77C
77C
77C

IndoorOutdoor

— S24N24E03N 1,155.
— S24N24E05N 1,560.
— S24N24E07N 2,010.

—
—
—

—
—
—

EP
EP
EP

115
115
115

19
13-3/8
19
13-3/8
22-3/8 16-3/8

10-1/2 193
10-1/2 216
14-1/8 375

482
482
568

339
339
416

266
266
359

87
98
170

FR179
FR180
FR182

77C
77C
77C

IndoorOutdoor

— S24N24E10N 2,450.
— S24N24E15N 3,350.
— S24N24E25N 4,800.

277 Volts to 120/240 Volts
3
5
7.5
10
15
25

9

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8 7-3/4
16
10-3/8
16
10-3/8

8
65
9-7/8 113
9-7/8 123

359
406
406

197
263
263

203
251
251

29
51
55

FR176 513B
FR177 513B
FR178 513B

IndoorOutdoor

— S27N11E03N 1,320.
— S27N11E05N 1,950.
— S27N11E07N 2,585.

—
—
—

—
—
—

EP
EP
EP

115
115
115

19
13-3/8
19
13-3/8
22-3/8 16-3/8

10-1/2 193
10-1/2 216
14-1/8 375

482
482
568

339
339
416

266
266
359

87
98
170

FR179 513B
FR180 513B
FR182 513B

IndoorOutdoor

— S27N11E10N 3,100.
— S27N11E15N 3,650.
— S27N11E25N 5,200.

240 x 480 Volts to 120/240 Volts
.25 —
.50 —
.75 —



EP
EP
EP

115
115
115

6-1/2
6-1/2
8-3/8

4-7/8
4-7/8
6

3-7/8
4-5/8
5-3/4

12
13
21

165
165
213

124
124
152

98
117
146

5
6
10

FR56
FR57
FR58A

90A
90A
90A

IndoorOutdoor

— S20N11E26A
— S20N11E51A
— S20N11E76A

150.
190.
245.

6
6-3/16
6-3/16

5-3/4
6-1/8
6-1/8

31
40
40

213
273
273

152
157
157

146
156
156

14
18
18

FR59A
FR67
FR68

90A
90A
90A

IndoorOutdoor

— S20N11E01A
— S20N11E16A
— S20N11E02A

290.
355.
450.

8
65
9-7/8 113
9-7/8 123

359
406
406

195
263
263

203
251
251

29
51
55

FR176
FR177
FR178

90A
90A
90A

IndoorOutdoor

— S20N11E03A
— S20N11E05A
— S20N11E07A

550.
815.
1,080.

— S20N11E10A
— S20N11E15A
— S20L11E25A

1,300.
1,750.
2,475.

1
1.5
2

—
—
—

—
—
—

EP
EP
EP

115
115
115

8-3/8
10-3/4
10-3/4

3
5
7.5

—
—
—

—
—
—

EP
EP
EP

115
115
115

14-1/8 7-11/16
16
10-3/8
16
10-3/8

10
15
25

—
—

—
—



EP
EP
EP

115
115
115

19
13-3/8
19
13-3/8
22-3/8 16-3/8

10-1/2 193
10-1/2 216
14-1/8 375

482
482
568

339
339
416

266
266
359

87
98
170

FR179 90A
FR180 90A
FR182 526A

IndoorOutdoor

15
25
37.5









DS-3 150
DS-3 150
DS-3 150

30-1/4 16-7/8
31-1/4 22-5/8
37-5/8 22-5/8

15-7/8 147
17-1/2 212
19-1/2 306

768
793
953

428
574
574

402
445
495

67
96
139

FR815 261A
FR816 261A
FR817 261A

WS15
WS11
WS11

350. T20P11E15
350. T20P11E25
350. T20P11E37

1,600.
2,075.
2,540.









DS-3 150
DS-3 150
DS-3 150

37-5/8 22-5/8
42-1/8 24
42-1/8 24

19-1/2 340
23-3/8 510
23-3/8 600

953
1070
1070

574
610
610

495
594
594

154
233
274

FR818 261A
FR819 261A
FR820 261A

WS11
WS16
WS16

350. T20P11E50
800. T20P11E75
800. T20P11E99

3,080.
4,350.
5,400.

50
75
100



—
—
—




2@+5% FCBN at 240 volts; 4@-2.5% FCBN at 480 volts.
1@+5%, 2@-5% at 240 volts primary; 2@+2.5%, 4@-2.5% at 480 volts primary.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Electrostatically Shielded Transformers

9-29

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0329]

Table 9-29. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt. Frame
Lbs. H
kg
W
D

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

208 ∆ Volts to 208Y/120 Volts
15

2@+2.5% 2@-2.5%

EPT

115

17-3/8

19-3/4

10-1/2

275

441

502

266

124 FR95

15
30

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3

150
150

25
30-1/8

20-1/8
20-1/8

14-1/8
14-1/8

152
230

635
765

511
511

359
359

69 FR909
104 FR910A

45
2@+2.5% 4@-2.5%
75
2@+2.5% 4@-2.5%
112.5 1@+5%
2@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
600

765
1000
1000

511
663
663

359
485
485

150
225
300

DT-3
DT-3
DT-3

150
150
150

46-1/8
62-1/4
62-1/4

28
31-1/4
31-1/4

23
30-1/4
30-1/4

760
1600
1600

1171
1581
1581

712
794
794

585
768
768

1@+5%
1@+5%
1@+5%

2@-5%
2@-5%
2@-5%

86A
283A
283A

IndoorOutdoor
WS31
WS31

—
—
350.
350.

Y29D28E15B
—
V29M28E15A
V29M28E30B

2,950.
—
2,080.
2,660.

140 FR912A
217 FR914B
272 FR915B

283A
283A
287A

WS31
WS33
WS33

350. V29M28E45B
350. V29M28E75B
350. V29R28E12B

3,235.
4,575.
6,620.

344 FR916A
728 FR918A
728 FR918A

287A
287A
287A

WS19
WS34
WS34

350. V29R28E49B
800. V29R28E22B
800. V29R28E33B

8,300.
12,100.
15,400.

480 ∆ Volts to 208Y/120 Volts
3
6
9
15

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5%
2@-2.5%
2@-2.5%
2@-2.5%

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

15-5/16
16-1/2
16-1/2
19-3/4

8-5/16
9-7/8
9-7/8
10-1/2

116
143
166
275

339
403
403
441

404
419
419
419

211
251
251
251

Y48D28E03A
Y48D28E06A
Y48D28E09N
Y48D28E15B

1,165.
1,420.
1,840.
2,310.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
239
310

635
765
765

511
511
511

359
359
359

69 FR909
108 FR910A
140 FR912A

283B
283B
283B

WS31
WS31
WS31

350. V48M28E15B
350. V48M28E30B
350. V48M28E45B

1,485.
1,900.
2,310.

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

485
485
585

217 FR914B
272 FR915B
344 FR916A

283B
283B
283B

WS33
WS33
WS19

350. V48M28E75B
350. V48M28E12B
350. V48M28E49B

3,270.
4,945.
6,200.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

793
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

283B
283B
292A

WS34
WS34
WS35

800. V48M28E22B
800. V48M28E33B
1,360. V48M28E55G

9,000.
11,500.
18,400.

750
1000

2@+2.5% 4@-2.5%
1@+3.5% 1@-3.5%

DT-3
DT-3

150
150

75
68

44-1/2
64

36
45

2900
4350

1905
1727

1130
1625

914
1143

1315 FR920
1912




292A

WS35

1,360. V48M28E77B
— V48W28E11A 

28,600.
51,200.

52
64
75
75

FR201
FR200
FR103
FR95

86B
86B
86B
86B

IndoorOutdoor




—
—
—
—

480 ∆ Volts to 208Y/120 Volts — Copper Windings
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

172
300
370

635
765
765

511
511
511

359
359
359

78 FR909
136 FR910A
168 FR912A

283B
283B
283B

WS31
WS31
WS31

350. V48M28E15CU
350. V48M28E30CU
350. V48M28E45CU

2,300.
2,520.
3,180.

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

550
675
850

1000
1000
1171

663
663
712

485
485
585

250 FR914B
307 FR915B
386 FR916A

283B
283B
283B

WS33
WS33
WS19

350. V48M28E75CU
350. V48M28E12CU
350. V48M28E49CU

4,830.
6,600.
9,020.

225
300
500

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1200
2150
2400

1422
1581
1905

793
794
1130

616
768
914

545 FR917
977 FR918A
1088 FR919

283B
283B
292A

WS34
WS34
WS35

800. V48M28E22CU
800. V48M28E33CU
1,360. V48M28E55CU

12,150.
15,200.
24,590.

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

480 ∆ Volts to 480Y/277 Volts





9
15

2@+2.5% 2@-2.5%
2@+2.5% 2@-2.5%

EPT
EPT

115
115

15-7/8
17-3/8

16-1/2
19-3/4

9-7/8
10-1/2

166
275

403
441

419
419

251
266

75 FR103
75 FR95

86C
86C

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

359
359
485

104 FR910A
140 FR912A
217 FR914B

283B
283B
283B

112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%
225
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

663
712
793

485
585
616

272 FR915B
344 FR916A
499 FR917

300
500
750

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2400
2900

1581
1905
1905

794
1130
1130

768
914
914

728 FR918A
1088 FR919
1315 FR920

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

IndoorOutdoor

— Y48D47E09N
— Y48D47E15B

2,380.
3,000.

WS31
WS31
WS33

350. V48M47E30B
350. V48M47E45B
350. V48M47E75B

2,560.
3,120.
4,410.

283B
283B
283B

WS33
WS19
WS34

350. V48M47E12B
350. V48M47E49B
800. V48M47E22B

6,390.
8,000.
11,730.

283B
292A
292A

WS34
WS35
WS35

800. V48M47E33B
1,360. V48M47E55G
1,360. V48M47E77A

14,850.
23,750.
38,600.

Refer to your Cutler-Hammer sales office.
Not seismic qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Electrostatically Shielded Transformers

9-30

November 2003

Three-Phase, Types EPT, DT-3, 60 Hz

Vol. 1, Ref. No. [0330]

Table 9-30. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

FR201
FR200
FR103
FR95

88A
88A
505B
505B

IndoorOutdoor

Price
U.S. $

480 ∆ Volts to 240 ∆ Volts
3
6
9
15

—
—
—
—

2@-5%
2@-5%
4@-2.5%
4@-2.5%

EPT
EPT
EPT
EPT

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

16
16-1/2
16-1/2
19-3/4

8-3/8
9-7/8
9-7/8
10-1/2

116
143
166
275

339
403
403
441

404
419
419
502

211
251
251
266

52
64
75
75

—
—
—
—

Y48G24E03A
Y48G24E06A
Y48J24E09A
Y48J24E15A

1,310.
1,590.
2,060.
2,585.

480 ∆ Volts to 240 ∆ Volts With 120 Volt Lighting Tap on B Phase 

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
230
310

635
765
765

511
511
511

359
359
359

69 FR909
104 FR910A
140 FR912A

284B
284B
284B

WS31
WS31
WS31

350. V48M22E15B
350. V48M22E30A
350. V48M22E45A

1,700.
2,200.
2,750.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

485
485
585

217 FR914B
272 FR915B
344 FR916A

284B
284B
284B

WS33
WS33
WS19

350. V48M22E75A
350. V48M22E12A
350. V48M22E49A

3,760.
5,390.
6,830.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

793
794
1130

616
768
914

499 FR917
728 FR918A
1088 FR919

284B
284B
293A

WS34
WS34
WS35

800. V48M22E22A
800. V48M22E33A
1,360. V48M22E55A

10,000.
12,650.
20,150.




9

Center Tap capacity limited to 5% of rated kVA.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Energy Efficient Transformers

9-31

November 2003
Vol. 1, Ref. No. [0331]

Single- and Three-Phase,
Types EP, DS-3, EPT, DT-3, 60 Hz

Type DT-3

Product Description
Types EP, EPT
■
■
■
■
■
■
■

■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC rise
standard.
Available in single-phase ratings
through 37.5 kVA and 4160 volts
primary (EP).
Available in three-phase ratings
through 75 kVA and 4160 volts
primary (EPT).

Types DS-3, DT-3
■
■

■
■
■

■

Ventilated, NEMA 2 enclosure
standard.
Suitable for indoor applications,
outdoors when weathershields are
also installed.
Upright mounting only.
220ºC Insulation System, 150ºC rise
standard.
Available in single-phase ratings
15 – 167 kVA and up to 4160 volts
primary (DS-3).
Available in three-phase ratings
15 – 1500 kVA and up to 4160 volts
primary (DT-3).

Single- and Three-Phase, Types EP, DS-3, EPT, DT-3, 60 Hz

Application Description
Low Temperature Rise Energy Efficient
transformers are designed with lower
than normal conductor and total
losses. Temperature rise is therefore
lower resulting in greatly improved life
expectancies and substantial increases
in overload capabilities. 80°C and
115°C rise transformers can help cut
operating expenses for systems
requiring unit loading at 80 to 100% of
the nameplate rating, 24 hours a day,
or where load growth is expected.
A 115°C rise transformer can carry
a continuous 15% overload, and the
80°C rise a 30% overload, without
exceeding the insulation rating or
seriously reducing the life expectancy
of the transformer. However, when
operating in an overload condition,
the internal temperature increases
as a result of the higher conductor
losses. Efficiency decreases under this
condition. Since transformers operate
beyond nameplate capacities usually
during peak load periods, the
benefits remain.
NEMA TP-1-1996,
compliant
Energy Efficient Transformers are
specifically designed to meet the
energy efficiency standards set forth
in NEMA Standards publication,
TP-1-1996, “Guide for Determining
Energy Efficiency for Distribution
Transformers.” Surveys have shown
that the average loading of low voltage dry-type distribution transformers,
over a 24 hour period, is approximately 35%. NEMA TP-1 compliant
transformers are optimized to offer
maximum efficiency at 35% of nameplate rating. In applications where the
Eaton’s Cutler-Hammer low temperature rise (115ºC or 80ºC) product offers
significant energy savings.
The range of products covered by
NEMA TP-1-1996 are:

Transformers that are currently specifically excluded from the scope of
NEMA Standard TP-1-1996 include:
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■

Liquid-filled transformers below
10 kVA.
Dry-type transformers below 15 kVA.
ac and dc drives transformers.
Rectifier transformers and transformers designed for high harmonics.
Autotransformers.
Non-distribution transformers, such
as UPS transformers.
Special impedance, regulation, or
harmonic transformers.
Regulating transformers.
Sealed and non-ventilated
transformers.
Retrofit transformers.
Machine tool transformers.
Welding transformers.
Transformers with tap ranges
greater than 15%.
Transformers with a frequency other
than 60 Hz.
Grounding transformers.
Testing transformers.

Efficiency levels set forth in
NEMA TP-1-1996.
Table 9-32. NEMA TP-1-1996 Efficiency Levels
Tables of Energy Efficiency
NEMA Class 1 Efficiency Levels
dry-type Distribution Transformers —
Low Voltage
Single-Phase
kVA

Three-Phase

Efficiency kVA

Efficiency

97.7
98.0
98.2

15
30
45

97.0
97.5
97.7

50
75
100

98.3
98.5
98.6

75
112.5
150

98.0
98.2
98.3

167
250
333
—
—

98.7
98.8
98.9
—
—

15
25
37.5

225
300
500
750
1000

98.5
98.6
98.7
98.8
98.9

Table 9-31. NEMA TP-1-1996 Product Range
Voltage
Class

Primary
Voltage

34.5 kV
and below

Secondary
Voltage

600 V
and below

Dry-Type
Rating

Single-Phase

10 – 833 kVA

Three-Phase

15 – 2500 kVA

Liquid
Rating

Single-Phase

10 – 833 kVA

Three-Phase

15 – 2500 kVA

Features, Benefits
and Functions
■

UL listed.
60 Hz operation (except as noted).
■ Short-term overload capability as
required by ANSI.
■ Meet NEMA ST-20 sound levels.
■

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

9-32

Transformers
Energy Efficient Transformers
November 2003

Single- and Three-Phase, Types EP, DS-3, EPT, DT-3, 60 Hz

Standards and Certifications

Insulation System and Temperature Rise

Winding Terminations

Industry Standards

Industry standards classify insulation
systems and rise as shown below:

Primary and secondary windings are
terminated in the wiring compartment.
Encapsulated units have copper leads
or stabs brought out for connections.
Ventilated transformers have leads
brought out to aluminum pads that
are pre-drilled to accept Cu/Al lugs.
Lugs are not supplied with these
transformers. The Cutler-Hammer
business recommends external cables
be rated 90°C (sized at 75°C ampacity)
for encapsulated designs and 75°C for
ventilated designs.

All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

9

Vol. 1, Ref. No. [0332]

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hertz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one half hour; 150% load for one hour;
and 125% load for four hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Table 9-33. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer ventilated transformers, Types DS-3 and DT-3, utilize a
NEMA 2 rated (drip-proof) enclosure
as standard, and are rated NEMA 3R
with the addition of weathershields.
Cutler-Hammer encapsulated transformers, Types EP and EPT, utilize a
NEMA 3R rated enclosure.

Sound Levels
All Cutler-Hammer 600 volt class
general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to
be installed in an area where sound
may be a concern.

Series-Multiple Windings
Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or
240 with a 120 mid-point.

Technical Data
and Specifications
Please refer Page 9-122.

Table 9-34. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
NEMA TP-1 Energy Efficient Transformers

9-33

November 2003

Single-Phase, Type DS-3

Vol. 1, Ref. No. [0333]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-35. Single-Phase Selection Information — Type DS-3 60 Hz NEMA TP-1 Compliant,
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Labeled

Wt. Dimensions (mm) Wt. Frame Wiring
Weathershield Style
Lbs. H
kg
Diagram Catalog Price Number
W
D
Number Number U.S. $

Price
U.S. $

240 x 480 Volts to 120/240 Volts, Aluminum Windings
15
25
37.5
50
75
100
167
15
25
37.5
50
75
100
15
25
37.5
50
75
100



















DS-3
DS-3
DS-3
DS-3

150
150
150
150

31-1/4
31-1/4
37-5/8
42-1/8

22-5/8
22-5/8
22-5/8
24

17-1/2
17-1/2
19-1/2
23-3/8

212 768
212 768
306 956
510 1070

428
428
574
610

402
402
495
594

67
67
139
232

816
816
817
819

3XA
3XA
3XA
3XA

WS11
WS11
WS11
WS16

350.
350.
350.
800.











2@+2.5% 4@-2.5%

DS-3
DS-3
DS-3

150
150
150

42-1/8
62-1/2
62-1/2

24
30
30

23-3/8
34
34

510 1070
1200 1597
1200 1597

610
762
762

594
863
863

232
545
545

819
814
814

3XA
3XA
288A

WS16
WS13
WS13

800. T20P11S75EE
800. T20P11S99EE
800. T48M11S67EE 















DS-3
DS-3
DS-3

115
115
115

31-1/4
31-1/4
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
17-1/2
19-1/2

768
768
956

428
428
574

402
402
495

67
67
154

816
816
818

3XA
3XA
3XA

WS11
WS11
WS11

350. T20P11F15EE
350. T20P11F25EE
350. T20P11F37EE

2,120.
2,820.
3,380.















DS-3
DS-3
DS-3

115
115
115

42-1/8
42-1/8
62-1/2

24
24
30

23-3/8
23-3/8
34

510 1070
510 1070
1200 1597

610
610
762

594
594
863

232
232
545

819
819
814

3XA
3XA
288A

WS16
WS16
WS13

800. T20P11F50EE
800. T20P11F75EE
800. T20P11F99EE

4,100.
5,790.
7,080.















DS-3
DS-3
DS-3

80
80
80

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

768
956
956

428
574
574

402
495
495

67
139
154

816
817
818

3XA
3XA
3XA

WS11
WS11
WS11

350. T20P11B15EE
350. T20P11B25EE
350. T20P11B37EE

2,540.
3,400.
4,010.















DS-3
DS-3
DS-3

80
80
80

42-1/8
42-1/8
62-1/2

24
24
30

23-3/8
23-3/8
34

510 1070
600 1070
1200 1597

610
610
762

594
594
863

232
272
545

819
820
814

3XA
3XA
288A

WS16
WS16
WS13

800. T20P11B50EE
800. T20P11B75EE
800. T20P11B99EE

4,900.
6,900.
9,220.

768
956
956
956

428
574
574
574

402
495
495
495

108
158
158
173

816
817
817
818

3XA
3XA
3XA
3XA

WS11
WS11
WS11
WS11

350.
350.
350.
350.

2,450.
3,280.
3,890.
4,750.

614 1070
1440 1597
1440 1597

610
762
762

594
863
863

279
655
655

819
814
814

3XA
288A
288A

WS16
WS13
WS13

6,660.
800. T20P11S75CUEE
8,220.
800. T20P11S99CUEE
800. T48M11S67CUEE  16,625.

768
956
956

428
574
574

402
495
495

108
158
173

816
817
818

3XA
3XA
3XA

WS11
WS11
WS11

350. T20P11F15CUEE
350. T20P11F25CUEE
350. T20P11F37CUEE

2,810.
3,760.
4,440.

614 1070
614 1070
1440 1597

610
610
762

594
594
863

279
279
655

819
819
814

3XA
3XA
288A

WS16
WS16
WS13

800. T20P11F50CUEE
800. T20P11F75CUEE
800. T20P11F99CUEE

5,430.
7,620.
9,350.

768
956
956

428
574
574

402
495
495

108
158
173

816
817
818

3XA
3XA
3XA

WS11
WS11
WS11

350. T20P11B15CUEE
350. T20P11B25CUEE
350. T20P11B37CUEE

3,260.
4,360.
5,150.

212
212
340

212
306
340

T20P11S15EE
T20P11S25EE
T20P11S37EE
T20P11S50EE

1,810.
2,420.
2,860.
3,500.
4,910.
6,020.
13,300.

240 x 480 Volts to 120/240 Volts, Copper Windings
15
25
37.5
50
75
100
167
15
25
37.5
50
75
100
15
25
37.5
50
75
100



















DS-3
DS-3
DS-3
DS-3

150
150
150
150

31-1/4
37-5/8
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2
19-1/2











2@+2.5% 4@-2.5%

DS-3
DS-3
DS-3

150
150
150

42-1/8
62-1/2
62-1/2

24
30
30

23-3/8
34
34















DS-3
DS-3
DS-3

115
115
115

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2















DS-3
DS-3
DS-3

115
115
115

42-1/8
42-1/8
62-1/2

24
24
30

23-3/8
23-3/8
34















DS-3
DS-3
DS-3

80
80
80

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2











DS-3
DS-3
DS-3

80
80
80

42-1/8
42-1/8
62-1/2

24
24
30

23-3/8
23-3/8
34

614 1070
700 1070
1440 1597

610
610
762

594
594
863

279
318
655

819
820
814

3XA
3XA
288A

WS16
WS16
WS13

6,300.
800. T20P11B50CUEE
8,850.
800. T20P11B75CUEE
800. T48M11B99CUEE  11,610.

2@+2.5% 4@-2.5%

237
345
345
381

237
345
381

237
345
381

T20P11S15CUEE
T20P11S25CUEE
T20P11S37CUEE
T20P11S50CUEE

208 Volts to 120/240 Volts, Aluminum Windings
15
25
37.5
50
75
100

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DS-3
DS-3
DS-3
DS-3

150
150
150
150

31-1/4
31-1/4
37-5/8
42-1/8

22-5/8
22-5/8
22-5/8
24

17-1/2
17-1/2
19-1/2
23-3/8

212 768
212 768
306 956
510 1070

428
428
574
610

402
402
495
594

67
67
139
232

816
816
817
819

260A
260A
260A
260A

WS11
WS11
WS11
WS16

350.
350.
350.
800.

T29M11S15EE
T29M11S25EE
T29M11S37EE
T29M11S50EE

3,015.
5,275.
6,460.
7,840.

1@+5%
2@-5%
2@+2.5% 4@-2.5%

DS-3
DS-3

150
150

42-1/8
62-1/2

24
30

23-3/8
34

510 1070
1200 1597

610
762

594
863

232
545

819
814

551A
260A

WS16
WS13

800. T29R11S75EE
800. T29M11S99EE

11,085.
13,770.

277 Volts to 120/240 Volts, Aluminum Windings
15
25
37.5
50
75
100




2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DS-3
DS-3
DS-3
DS-3

150
150
150
150

31-1/4
31-1/4
37-5/8
42-1/8

22-5/8
22-5/8
22-5/8
24

17-1/2
17-1/2
19-1/2
23-3/8

212 768
212 768
306 956
510 1070

428
428
574
610

402
402
495
594

67
67
139
232

816
816
817
819

262C
262C
262C
262C

WS11
WS11
WS11
WS16

350.
350.
350.
800.

T27M11S15EE
T27M11S25EE
T27M11S37EE
T27M11S50EE

3,015.
5,275.
6,460.
7,840.

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DS-3
DS-3

150
150

42-1/8
62-1/2

24
30

23-3/8
34

510 1070
1200 1597

610
762

594
863

232
545

819
814

262C
262C

WS16
WS13

800. T27M11S75EE
800. T27M11S99EE

11,085.
13,770.

+1 – 5%, -2 – 5% at 240 volts primary; +2 – 2.5%, -4 – 2.5% at 480 volts primary.
480 volt primary only.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
NEMA TP-1 Energy Efficient Transformers

9-34

November 2003

Three-Phase, Type DT-3

Vol. 1, Ref. No. [0334]

Table 9-36. Three-Phase Selection Information — Type DT-3 60 Hz NEMA TP-1 Compliant,
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Labeled

Wt. Dimensions (mm) Wt. Frame Wiring
Weathershield Style
Lbs. H
kg
Diagram Catalog Price Number
W
D
Number Number U.S. $

Price
U.S. $

480 
 Volts to 208Y/120 Volts, Aluminum Windings

9

15
30
45

1@+2.5% 3@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30
30

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
310
310

635
762
762

511
511
511

359
359
359

69 909
140 912A
140 912A

375A
280B
280B

WS31
WS31
WS31

350. V48U28T15EE
350. V48M28T30EE
350. V48M28T45EE

1,830.
2,330.
2,840.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-1/4
39-1/4
46-5/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480 995
600 995
785 1183

663
663
710

486
486
584

217 914B
272 915B
357 916A

280B
280B
280B

WS33
WS33
WS19

350. V48M28T75EE
350. V48M28T12EE
350. V48M28T49EE

4,025.
5,850.
7,300.

225
300
500
750

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

56-1/4
62-1/4
75
75

31-1/4
31-1/4
44-1/2
44-1/2

24-1/4
30-1/4
35-3/4
35-3/4

1100
1444
2400
2900

1427
1579
1905
1905

793
793
1129
1129

616
768
908
908

917
918A
919
920

280B
280B
275A
275A

WS34
WS34
WS35
WS35

15
30
45

1@+2.5% 3@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

25
30
39-1/4

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

152
310
480

635
762
995

511
511
663

359
359
486

69 909
140 912A
217 914B

375A
280B
280B

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

39-1/4
39-1/4
46-5/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

600 995
600 995
785 1183

663
663
710

486
486
584

272 915B
272 915B
357 916A

225
300
500
750

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

115
115
115
115

56-1/4
75
75
75

31-1/4
44-1/2
44-1/2
44-1/2

24-1/4
35-3/4
35-3/4
35-3/4

1100
2400
2900
2900

1427
1905
1905
1905

793
1129
1129
1129

616
908
908
908

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

30
30
39-1/4

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

762
762
995

511
511
663

359
359
486

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

39-1/4
46-5/8
56-1/4

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600 995
785 1183
1100 1427

663
710
793

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
35-3/4
35-3/4

1444 1579
2400 1905
2900 1905

793
1129
1129

499
656
1088
1315

800.
800.
1,360.
1,360.

V48M28T22EE
V48M28T33EE
V48M28T55EE
V48M28T77EE

10,680.
13,500.
21,800.
36,800.

WS31
WS31
WS33

350. V48U28F15EE
350. V48M28F30EE
350. V48M28F45EE

2,380.
2,840.
3,475.

280B
280B
280B

WS33
WS33
WS19

350. V48M28F75EE
350. V48M28F12EE
350. V48M28F49EE

5,290.
7,215.
9,850.

280B
275A
275A
275A

WS34
WS34
WS35
WS35

104 910A
140 912A
217 914B

280B
280B
280B

486
584
616

272 915B
357 916A
499 917

768
908
908

656 918A
1088 919
1315 920

499
1088
1315
1315

917
919
920
920

800.
800.
1,360.
1,360.

V48M28F22EE
V48M28F33EE
V48M28F55EE
V48M28F77EE

13,150.
16,490.
25,070.
40,365.

WS31
WS31
WS33

350. V48M28B15EE
350. V48M28B30EE
350. V48M28B45EE

2,800.
3,250.
4,085.

280B
280B
280B

WS33
WS19
WS34

350. V48M28B75EE
350. V48M28B12EE
800. V48M28B49EE

6,190.
8,450.
11,550.

280B
275A
275A

WS34
WS35
WS35

800. V48M28B22EE
1,360. V48M28B33EE
1,360. V48M28B55EE

15,450.
19,350.
29,430.

480 
 Volts to 240 
 Volts with 120 Volt Lighting Tap Phase B, Aluminum Windings
15
30
45

1@+2.5% 3@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30
39-1/4

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

152
310
480

635
762
995

511
511
663

359
359
486

69 909
140 912A
217 914B




282B
282B

WS31
WS31
WS33

350. V48U22T15EE
350. V48M22T30EE
350. V48M22T45EE

2,095.
2,800.
3,500.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-1/4
39-1/4
46-5/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

600 995
600 995
785 1183

663
663
710

486
486
584

272 915B
272 915B
357 916A

282B
282B
282B

WS33
WS33
WS19

350. V48M22T75EE
350. V48M22T12EE
350. V48M22T49EE

4,830.
7,020.
8,760.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56-1/4
75
75

31-1/4
44-1/2
44-1/2

24-1/4
35-3/4
35-3/4

1100 1427
2400 1905
2900 1905

793
1129
1129

616
908
908

282B
282B
291A

WS34
WS35
WS35

800. V48M22T22EE
1,360. V48M22T33EE
1,360. V48M22T55EE

12,850.
16,300.
26,500.




499 917
1088 919
1315 920

Refer to your local Cutler-Hammer sales office.

Note: Additional voltage combinations are available. Contact your local Cutler-Hammer sales office for assistance if the voltage you require is
not included in this catalog.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
NEMA TP-1 Energy Efficient Transformers

9-35

November 2003

Three-Phase, Type DT-3

Vol. 1, Ref. No. [0335]

Table 9-36. (Continued) Three-Phase Selection Information — Type DT-3 60 Hz NEMA TP-1 Compliant,
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Labeled

Wt. Dimensions (mm) Wt. Frame Wiring
Weathershield Style
Lbs. H
kg
Diagram Catalog Price Number
W
D
Number Number U.S. $

Price
U.S. $

480 
 Volts to 208Y/120 Volts, Copper Windings
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30
30

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

172
370
370

635
762
762

511
511
511

359
359
359

78 909
168 912A
168 912A

280B
280B
280B

WS31
WS31
WS31

350. V48M28T15CUEE
350. V48M28T30CUEE
350. V48M28T45CUEE

2,800.
3,170.
3,870.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-1/4
39-1/4
46-5/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

675 995
675 995
870 1183

663
663
710

486
486
584

307 915B
307 915B
391 916A

280B
280B
280B

WS33
WS33
WS19

350. V48M28T75CUEE
350. V48M28T12CUEE
350. V48M28T49CUEE

5,470.
7,960.
9,940.

225
300
500
750

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

56-1/4
62-1/4
75
75

31-1/4
31-1/4
44-1/2
44-1/2

24-1/4
30-1/4
35-3/4
35-3/4

1200
1894
3100
3600

1427
1579
1905
1905

793
793
1129
1129

616
768
908
908

917
918A
919
920

280B
280B
275A
275A

WS34
WS34
WS35
WS35

15
30
45

2@+2.5% 2@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

25
30
39-1/4

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

172
370
550

635
762
995

511
511
663

359
359
486

78 909
168 912A
250 914B

266W
280B
280B

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

39-1/4
39-1/4
46-5/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

675 995
675 995
870 1183

663
663
710

486
486
584

307 915B
307 915B
391 916A

225
300
500
750

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

115
115
115
115

56-1/4
75
75
75

31-1/4
44-1/2
44-1/2
44-1/2

24-1/4
35-3/4
35-3/4
35-3/4

1200
3100
3100
3600

1427
1905
1905
1905

793
1129
1129
1129

616
908
908
908

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

30
30
39-1/4

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
675

762
762
995

511
511
663

359
359
486

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

39-1/4
46-5/8
56-1/4

26-1/8
28
31-1/4

19-1/8
23
24-1/4

675 995
870 1183
1200 1427

663
710
793

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
35-3/4
35-3/4

1894 1579
3100 1905
3600 1905

545
861
1409
1636

800.
800.
1,360.
1,360.

V48M28T22CUEE
V48M28T33CUEE
V48M28T55CUEE
V48M28T77CUEE

15,500.
18,500.
29,800.
47,390.

WS31
WS31
WS33

350. V48D28F15CUEE
350. V48M28F30CUEE
350. V48M28F45CUEE

3,210.
3,825.
4,690.

280B
280B
280B

WS33
WS33
WS19

350. V48M28F75CUEE
350. V48M28F12CUEE
350. V48M28F49CUEE

7,140.
9,740.
13,300.

280B
275A
275A
275A

WS34
WS35
WS35
WS35

136 910A
168 912A
307 915B

280B
280B
280B

486
584
616

307 915B
391 916A
545 917

793
1129
1129

768
908
908

861 918A
1409 919
1636 920

545
1409
1409
1636

917
919
919
920

800.
1,360.
1,360.
1,360.

V48M28F22CUEE
V48M28F33CUEE
V48M28F55CUEE
V48M28F77CUEE

17,750.
22,250.
33,790.
52,000.

WS31
WS31
WS33

350. V48M28B15CUEE
350. V48M28B30CUEE
350. V48M28B45CUEE

3,780.
4,130.
5,510.

280B
280B
280B

WS33
WS19
WS34

350. V48M28B75CUEE
350. V48M28B12CUEE
800. V48M28B49CUEE

8,350.
11,400.
15,600.

280B
275A
275A

WS34
WS35
WS35

800. V48M28B22CUEE
1,360. V48M28B33CUEE
1,360. V48M28B55CUEE

20,860.
26,120.
37,060.

480 
 Volts to 240 
 Volts with 120 Volt Lighting Tap Phase B, Copper Windings
15
30
45

1@+2.5% 3@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30
39-1/4

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

172
370
550

635
762
995

511
511
663

359
359
486

78 909
168 912A
250 914B




282B
282B

WS31
WS31
WS33

350. V48U22T15CUEE
350. V48M22T30CUEE
350. V48M22T45CUEE

2,830.
3,790.
4,730.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-1/4
39-1/4
46-5/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

675 995
675 995
870 1183

663
663
710

486
486
584

307 915B
307 915B
391 916A

282B
282B
282B

WS33
WS33
WS19

350. V48M22T75CUEE
350. V48M22T12CUEE
350. V48M22T49CUEE

6,470.
9,480.
11,850.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56-1/4
75
75

31-1/4
44-1/2
44-1/2

24-1/4
35-3/4
35-3/4

1200 1427
3100 1905
3600 1905

793
1129
1129

616
908
908

282B
282B
291A

WS34
WS35
WS35

800. V48M22T22CUEE
1,360. V48M22T33CUEE
1,360. V48M22T55CUEE

17,380.
21,900.
35,800.




545 917
1409 919
1636 920

Refer to your local Cutler-Hammer sales office.

Note: Additional voltage combinations are available. Contact your local Cutler-Hammer sales office for assistance if the voltage you require is
not included in this catalog.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Low Temperature Rise Energy Efficient Transformers

9-36

November 2003

Single-Phase, Type DS-3

Vol. 1, Ref. No. [0336]

Table 9-37. Single-Phase Selection Information — Type DS-3, 60 Hz Low Temperature Rise
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

240 x 480 Volts to 120/240 Volts
15
25
37.5
50
75
100
15
25
37.5
50
75
100


















DS-3
DS-3
DS-3

80
80
80

30-1/4
31-1/4
37-5/8

16-7/8
22-5/8
22-5/8

15-7/8
17-1/2
19-1/2











2@+2.5% 4@-2.5%

DS-3
DS-3
DS-3

80
80
80

37-5/8
42-1/8
62-1/8

22-5/8
24
30

19-1/2
23-3/8
34















DS-3
DS-3
DS-3

115
115
115

30-1/4
31-1/4
37-5/8

16-7/8
22-5/8
22-5/8

15-7/8
17-1/2
19-1/2

147
212
306















DS-3
DS-3
DS-3

115
115
115

37-5/8
42-1/8
42-1/8

22-5/8
24
24

19-1/2
23-3/8
23-3/8

147
212
306

768
793
953

428
574
574

402
445
495

67
96
139

FR816
FR817
FR818

3XA
3XA
3XA

WS11
WS11
WS11

350. T20P11B15
350. T20P11B25
350. T20P11B37

1,980.
2,560.
3,125.

340 953
510 1070
1150 1597

574
610
762

495
594
863

154
233
612

FR819
FR820
FR814

3XA
3XA
288A

WS16
WS16
WS13

800. T20P11B50
800. T20P11B75
800. T48M11B99A 

3,790.
5,350.
8,900.

768
793
953

428
574
574

402
445
495

67
96
139

FR815
FR816
FR817

3XA
3XA
3XA

WS15
WS11
WS11

350. T20P11F15
350. T20P11F25
350. T20P11F37

1,680.
2,200.
2,660.

340 953
510 1070
600 1070

574
610
610

495
594
594

154
233
274

FR818
FR819
FR820

3XA
3XA
3XA

WS11
WS16
WS16

350. T20P11F50
800. T20P11F75
800. T20P11F99

3,170.
4,520.
5,630.

+1 – 5%, -2 – 5% at 240 volts primary; +2 – 2.5%, -4 – 2.5% at 480 volts primary.
480 volt primary only.

9

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Low Temperature Rise Energy Efficient Transformers

9-37

November 2003

Three-Phase, Types EPT and DT-3

Vol. 1, Ref. No. [0337]

Table 9-38. Three-Phase Selection Information — Types EPT, DT-3, 60 Hz Low Temperature Rise
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield
Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts
15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

80
80
80
80

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

230
310
480
600

765
765
1000
1000

511
511
663
663

359
359
486
486

104
140
217
272

FR910A
FR912A
FR914B
FR915B

280B
280B
280B
280B

WS31
WS31
WS33
WS33

350.
350.
350.
350.

V48M28B15A
V48M28B30R
V48M28B45R
V48M28B75R

1,830.
2,350.
2,860.
4,040.

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

80
80
80
80

46-1/8
56
62-1/4
75

28
31-1/4
31-1/4
44-1/2

23
24-1/4
30-1/4
36

820
1100
1600
2400

1171
1422
1581
1905

712
793
794
1130

585
616
768
914

371
499
728
1088

FR916A
FR917
FR918A
FR919

280B
280B
280B
280B

WS19
WS34
WS34
WS35

350.
800.
800.
1,360.

V48M28B12R
V48M28B49P
V48M28B22P
V48M28B33R

5,850.
7,350.
10,670.
13,700.

2@+2.5% 4@-2.5%
—
—
1@+4.2% 1@-4.2%

DT-3
—
DT-3

80
—
80




75
—

44-1/2
—

35-3/4
—

3000
—

1905
—

1131
—

908
—

1365
—

FR920
—

275A
—

WS35
—

1,360. V48M28B55R
— V48D28B77
— V48T28B11R 

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

115
115
115
115

25
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

152
230
310
480

635
765
765
1000

511
511
511
663

359
359
359
486

69
104
140
217

FR909
FR910A
FR912A
FR914B

280B
280B
280B
280B

WS31
WS31
WS31
WS33

350.
350.
350.
350.

V48M28F15B
V48M28F30R
V48M28F45R
V48M28F75R

1,570.
2,000.
2,440.
3,450.

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

115
115
115
115

39-3/8
46-1/8
56
62-1/4

26-1/8
28
31-1/4
31-1/4

19-1/8
23
24-1/4
30-1/4

600
760
1100
1600

1000
1171
1422
1581

663
712
793
794

486
585
616
768

272
344
499
728

FR915B
FR916A
FR917
FR918A

280B
280B
280B
280B

WS19
WS33
WS34
WS34

350.
350.
800.
800.

V48M28F12R
V48M28F49P
V48M28F22P
V48M28F33P

4,950.
6,250.
9,100.
11,750.

2@+2.5% 4@-2.5%
1@+3.5% 1@-3.5%
1@+4.2% 1@-4.2%

DT-3
DT-3
DT-3

115
115
115






75

44-1/2

36

2400

1905

1130

914

1088

FR919

275A

WS35

72B

500
750
1000

500
750
1000

















































































1,360. V48M28F55P
— V48W28F77T
— V48T28F11R 

22,000.
35,100.
65,100.

18,750.
31,200.
55,550.

480 ∆ Volts to 208Y/120 Volts, Copper Windings
9

2@+2.5% 2@-2.5%

EPT

80

17-3/8

19-11/16

10-7/16

300

441

499

265

136

FR95

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
550

765
765
1000

511
511
663

359
359
486

136
168
250

FR910A
FR912A
FR914B

75
112.5
150
225

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

80
80
80
80

39-3/8
46-1/8
56
62-1/4

26-1/8
28
31-1/4
31-1/4

19-1/8
675
20-3/16 850
24-1/4 1200
30-1/4 2150

1000
1171
1422
1581

663
712
793
794

486
585
616
768

307
386
545
977

300
500
750

2@+2.5% 4@-2.5%
2@+3.1% 2@-3.1%
1@+3.5% 1@-3.5%

DT-3
DT-3
DT-3

80
80
80






75

44-1/2

36

3100

1905

1130

914

1409

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3
DT-3

115
115
115
115

25
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

172
300
370
550

635
765
765
1000

511
511
511
663

359
359
359
486

112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%
225
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

675
850
1200

1000
1171
1422

663
712
793

300
500
750

DT-3
DT-3
DT-3

115
115
115




62-1/4
75

31-1/4
44-1/2

30-1/4
36

2150
3100

1581
1905

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
600

112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%
225
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

80
80
80

46-1/8
56
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

300
500

2@+2.5% 4@-2.5%
2@+3.1% 2@-3.1%

DT-3
DT-3

80
80




75

44-1/2

36

30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%
225
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

39-3/8
46-1/8
56

300
500
750

DT-3
DT-3
DT-3

115
115
115




62-1/4
75

15
30
45
75

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
1@+3.5% 1@-3.5%

280B
280B
280B

IndoorOutdoor
WS31
WS31
WS33

—
—
350.
350.
350.

Y48D28B09CU
—
V48M28B15CU
V48M28B30CU
V48M28B45CU

3,000.
—
2,700.
3,100.
3,940.

FR915B
FR916A
FR917
FR918A

280B
280B
280B
280B

WS33
WS19
WS34
WS34

350.
350.
800.
800.

V48M28B75CU
V48M28B12CU
V48M28B49CU
V48M28B22CU

5,970.
8,160.
11,150.
14,900.

FR919

280B

WS35

1,360. V48M28B33CU
— V48M28B55CU
— V48W28B77CU

18,660.
33,700.
44,500.

78
136
168
250

FR909
FR910A
FR912A
FR914B

280B
280B
280B
280B

WS31
WS31
WS31
WS33

350.
350.
350.
350.

V48M28F15CU
V48M28F30CU
V48M28F45CU
V48M28F75CU

2,300.
2,740.
3,350.
5,100.

486
585
616

307
386
545

FR915B
FR916A
FR917

280B
280B
280B

WS19
WS33
WS34

350. V48M28F12CU
350. V48M28F49CU
800. V48M28F22CU

6,960.
9,510.
12,690.

794
1130

768
914

977
1409

FR918A
FR919

280B
275A

WS34
WS35

800. V48M28F33CU
1,360. V48M28F55CU
— V48W28F77CU

16,000.
25,950.
39,500.

765
1000
1000

511
663
663

359
486
486

140
217
272

FR912A
FR914B
FR915B

281B
281B
281B

WS31
WS33
WS33

350. V48M24B30R
350. V48M24B45P
350. V48M24B75P

2,700.
3,400.
4,630.

760
1100
1600

1171
1422
1581

712
793
794

585
616
768

344
499
728

FR916A
FR917
FR918A

281B
281B
281B

WS19
WS34
WS34

350. V48M24B12P
800. V48M24B49P
800. V48M24B22P

6,660.
9,250.
12,300.

2400

1905

1130

914

1088

FR919

281B

WS35

1,360. V48M24B33P
— V48X24B55N

15,525.
26,400.

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

359
359
486

104
140
217

FR910A
FR912A
FR914B

281B
281B
281B

WS31
WS31
WS33

350. V48M24F30P
350. V48M24F45P
350. V48M24F75P

2,300.
2,900.
3,950.

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

663
712
793

486
585
616

272
344
499

FR915B
FR916A
FR917

281B
281B
281B

WS19
WS33
WS34

350. V48M24F12P
350. V48M24F49P
800. V48M24F22P

5,640.
7,140.
10,470.

31-1/4
44-1/2

30-1/4
36

1600
2400

1581
1905

794
1130

768
914

728
1088

FR918A
FR919

281B
274B

WS34
WS35

800. V48M24F33P
1,360. V48M24F55N
— V48W24F77N

13,225.
21,050.
37,450.

















































































480 ∆ Volts to 240 ∆ Volts
30
45
75





2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
1@+3.5% 1@-3.5%





























































Refer to your Cutler-Hammer sales office.
No UL label. Contact your local Cutler-Hammer sales office if UL label is required.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Energy Efficient Harmonic Mitigating Transformers

9-38

November 2003

Three-Phase, Type DT-3 HMT, 60 Hz

Energy Efficient Harmonic
Mitigating Transformers
Product Description
Three-Phase, Type DT-3 HMT, 60 Hz
■

■

9

■

■
■
■

Harmonic mitigating (cancellation)
transformers are a cost-effective
means of treating harmful harmonics
in an electrical distribution system.
Reducing harmonic content in electrical systems can result in a more
reliable electrical system, lower
maintenance costs, less downtime,
fewer equipment malfunctions, and
lower cooling system capacity.
Available in a variety of phase-shift
configurations that allow flexibility
to target specific harmonics.
Harmonic treatment via electromagnetic flux cancellation.
May be installed as a stand-alone
transformer, or included in IFS
Available in three-phase ratings
15 – 300 kVA, up to 600 volts primary.

Application Description
Eaton’s Cutler-Hammer harmonic mitigating transformers are available in
three phase-shift configurations. Type
NON is 0° phase-shift; Type NEG is 15°; and Type POS is +15° phase-shift.
The harmonic profile of a specific load
will determine which of these transformers, or combination of transformers, is best suited for a particular
application. As with any method of
treating harmonics, the load profile
needs to be known.
Type NON harmonic mitigating transformers are ideally suited for applications where the nonlinear loads are
single-phase. Such devices as computers, lighting ballasts, office equipment, diagnostic equipment, cash
registers, and other electronic equipment are all common single-phase
loads that generate harmonic currents.
Single-phase loads, such as those previously mentioned, generate harmonic
profiles that are rich in 3rd and other
triplen (9th, 15th, 21st, …) harmonic
currents. Type NON harmonic mitigating transformers treat triplen harmonics in the secondary windings such
that these harmonics are not coupled
into the primary delta.







Vol. 1, Ref. No. [0338]

In addition to treating triplen harmonics, Types POS and NEG harmonic mitigating transformers may be used in
pairs to treat 5th, 7th, and higher order
harmonics commonly generated by
three-phase loads. As with Type NON
transformers, POS and NEG treat triplen harmonics in the secondary of
each transformer. 5th, 7th and other
higher order harmonics pass through
the transformers and are canceled in
the common bus that feeds the pair of
transformers. It is not necessary for
the POS and NEG transformers to be
located in the same room to achieve
harmonic treatment. In order to attain
maximum harmonic treatment, every
effort should be made to balance the
nonlinear loads phase-to-phase as well
as between multiple transformers.

Features and Benefits
■

■
■
■
■
■

■

■
■
■
■

480 volt delta to 208Y/120 volt
standard. Additional voltage
combinations available.
150°C, 115°C, or 80°C temperature
rise available.
Copper windings and terminals
standard.
NEMA TP-1 energy efficient and
labeled.
200% rated neutral.
Single electrostatic shield for attenuation of common mode and transverse mode noise.
Approximately 98% efficient when
operated in systems with 100%
nonlinear load profiles.
Low zero sequence impedance and
zero sequence reactance.
220°C insulation system.
Third party tested for harmonic performance and energy efficiency.
Meets NEMA ST-20 sound standards.

For more information visit: www.cutler-hammer.eaton.com

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type transformers by Eaton Corporation are built and
tested in accordance with applicable
NEMA, ANSI, and IEEE Standards.
Harmonic Mitigating Transformers are
UL listed.

Seismic Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed the requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Options and Accessories
Harmonic mitigating transformers are
available with the same options and
accessories as general purpose ventilated transformers. Please refer to
Page 9-120.

CA08101001E

Transformers
Energy Efficient Harmonic Mitigating Transformers

9-39

November 2003

Three-Phase, Type DT-3 HMT, 60 Hz

Vol. 1, Ref. No. [0339]

Product Specifications

Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Industry standards classify insulation
systems and rise as shown below:

Cutler-Hammer ventilated transformers, Types DS-3 and DT-3 utilize a
NEMA 2 rated (drip-proof) enclosure
as a standard, and are rated NEMA 3R
with the addition of weathershields.
Cutler-Hammer encapsulated transformers, Types EP and EPT, utilize a
NEMA 3R rated enclosure as standard.

Table 9-39. Insulation System Classification

Sound Levels

Insulation System and Temperature Rise

Overload Capacity
Short-term overload is designed into
transformers as required by ANSI. Drytype distribution transformers will
deliver 200% nameplate load for onehalf hour; 150% load for one hour;
and 125% load for four hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.

Enclosures

Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 levels listed here. Lower
sound levels are available and must be
designed specially.

The design life of transformers having
different insulation systems is the
same — the lower temperature systems are designed for the same life as
the higher temperature systems.

Table 9-40. Average Sound Levels

9

NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Table 9-41. Type NON Harmonic Mitigating Transformer Selection Information
kVA

Full Cap. Taps
FCAN

Type

FCBN

°C
Temp.
Rise

Dimensions (Inches)
H

W

D

Wt.
Lbs.

Dimensions (mm)
H

W

D

Wt.
kg

Frame

Wiring
Diagram
Number

Weathershield
Catalog
Number

Price
U.S. $

Style
Number

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts, Shielded, Copper Windings, NEMA TP-1 Energy Efficient, 0-Degree Phase-shift
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

225
300

2@+2.5% 4@-2.5%
2@+2.5% 2@-2.5%

DT-3
DT-3

150
150

75
75

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

75
2@+2.5% 4@-2.5%
112.5 2@+2.5% 4@-2.5%
150
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

225
300

DT-3
DT-3

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

320
420
650

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28T15CUEENON
350. X48M28T30CUEENON
350. X48M28T45CUEENON

6,070.
7,430.
9,100.

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28T75CUEENON
800. X48M28T12CUEENON
800. X48M28T49CUEENON

11,710.
15,450.
21,400.

44-1/2
44-1/2

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28T22CUEENON
1,360. X48M28T33CUEENON

26,250.
36,300.

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28F15CUEENON
350. X48M28F30CUEENON
350. X48M28F45CUEENON

6,620.
8,110.
9,930.

115
115
115

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28F75CUEENON
800. X48M28F12CUEENON
800. X48M28F49CUEENON

12,770.
16,850.
23,330.

115
115

75
75

44-1/2
44-1/2

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28F22CUEENON
1,360. X48M28F33CUEENON

28,700.
39,500.

320
420
650

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







Transformers
Energy Efficient Harmonic Mitigating Transformers

9-40

November 2003

Three-Phase, Type DT-3 HMT, 60 Hz

Vol. 1, Ref. No. [0340]

Table 9-42. Type POS Harmonic Mitigating Transformer Selection Information
kVA

Full Cap. Taps
FCAN

Type

FCBN

°C
Temp.
Rise

Dimensions (Inches)
H

W

D

Wt.
Lbs.

Dimensions (mm)
H

W

D

Wt.
kg

Frame

Wiring
Diagram
Number

Weathershield
Catalog
Number

Price
U.S. $

Style
Number

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts. No Thermal Sensor, Shielded, Copper Windings, NEMA TP-1 Energy Efficient, +15-Degree Phase-shift

9

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3

150
150

75
75

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3

320
420
650

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28T15CUEEPOS
350. X48M28T30CUEEPOS
350. X48M28T45CUEEPOS

8,060.
9,085.
12,030.

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28T75CUEEPOS
800. X48M28T12CUEEPOS
800. X48M28T49CUEEPOS

14,890.
20,160.
28,500.

44-1/2
44-1/2

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28T22CUEEPOS
1,360. X48M28T33CUEEPOS

33,300.
37,900.

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28F15CUEEPOS
350. X48M28F30CUEEPOS
350. X48M28F45CUEEPOS

8,770.
9,900.
13,100.

115
115
115

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28F75CUEEPOS
800. X48M28F12CUEEPOS
800. X48M28F49CUEEPOS

16,200.
21,900.
31,000.

115
115

75
75

44-1/2
44-1/2

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28F22CUEEPOS
1,360. X48M28F33CUEEPOS

34,900.
39,900.

320
420
650

480 ∆ Volts to 208Y/120 Volts. Single Thermal Sensor Included, Shielded, Copper Windings, NEMA TP-1 Energy Efficient, +15-Degree Phase-shift
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3

115
115

75
75

44-1/2
44-1/2

320
420
650

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28F15TCUEEPOS
350. X48M28F30TCUEEPOS
350. X48M28F45TCUEEPOS

8,790.
9,920.
13,120.

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28F75TCUEEPOS
800. X48M28F12TCUEEPOS
800. X48M28F49TCUEEPOS

16,250.
22,000.
31,100.

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28F22TCUEEPOS
1,360. X48M28F33TCUEEPOS

35,000.
43,000.

Wt.
kg

Frame

Wiring
Diagram
Number

Weathershield

Table 9-43. Type NEG Harmonic Mitigating Transformer Selection Information
kVA

Full Cap. Taps
FCAN

Type

FCBN

°C
Temp.
Rise

Dimensions (Inches)
H

W

D

Wt.
Lbs.

Dimensions (mm)
H

W

D

Catalog
Number

Price
U.S. $

Style
Number

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts. No Thermal Sensor, Shielded, Copper Windings, NEMA TP-1 Energy Efficient, -15-Degree Phase-shift
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

150
150
150

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3

150
150

75
75

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3

320
420
650

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28T15CUEENEG
350. X48M28T30CUEENEG
350. X48M28T45CUEENEG

8,060.
9,085.
12,030.

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28T75CUEENEG
800. X48M28T12CUEENEG
800. X48M28T49CUEENEG

14,890.
20,160.
28,500.

44-1/2
44-1/2

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28T22CUEENEG
1,360. X48M28T33CUEENEG

33,300.
37,900.

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28F15CUEENEG
350. X48M28F30CUEENEG
350. X48M28F45CUEENEG

8,770.
9,900.
13,100.

115
115
115

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28F75CUEENEG
800. X48M28F12CUEENEG
800. X48M28F49CUEENEG

16,200.
21,900.
31,000.

115
115

75
75

44-1/2
44-1/2

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28F22CUEENEG
1,360. X48M28F33CUEENEG

34,900.
39,900.

320
420
650

480 ∆ Volts to 208Y/120 Volts. Single Thermal Sensor Included, Shielded, Copper windings, NEMA TP-1 Energy Efficient, -15-Degree Phase-shift
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

30
30
39-1/4

20-1/4
20-1/4
26-1/4

14-1/4
14-1/4
19-1/4

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3
DT-3

115
115
115

46-5/8
56-1/4
62-1/4

28
31-1/4
31-1/4

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

DT-3
DT-3

115
115

75
75

44-1/2
44-1/2

320
420
650

762
762
997

514
514
667

362
362
489

145
191
295

910A
912A
914B

200X
200X
200X

WS31
WS31
WS33

350. X48M28F15TCUEENEG
350. X48M28F30TCUEENEG
350. X48M28F45TCUEENEG

8,790.
9,920.
13,120.

23
24-1/4
30-1/4

850 1184
2000 1429
2170 1581

711
794
794

584
616
768

386
909
986

916A
917
918A

200X
200X
200X

WS19
WS34
WS34

350. X48M28F75TCUEENEG
800. X48M28F12TCUEENEG
800. X48M28F49TCUEENEG

16,250.
22,000.
31,100.

35-3/4
35-3/4

3100 1905
3300 1905

1130
1130

908
908

1409
1500

919
919

201X
201X

WS35
WS35

1,360. X48M28F22TCUEENEG
1,360. X48M28F33TCUEENEG

35,000.
43,000.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
K Factor Transformers

9-41

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0341]

K Factor Transformers
Single- and Three-Phase, Type KT,
60 Hz, for Nonlinear Loads

Coils
Windings are continuous wound aluminum or optional copper construction sized and configured to reduce
overheating caused by harmonic
currents. These coils reduce skin and
proximity effect losses which occur
when current carrying conductors
next to each other and coiled around
steel generate magnetic fields. These
magnetic fields push the currents
in the conductors away from each
other causing increased losses and
additional heating.

Neutral Bus

Type KT

Product Description
■

Suitable for indoor or outdoor
applications (with weathershield).
■ Ventilated enclosures.
■ 220°C Insulation system, 150°C Rise
standard (self extinguishing).

Application Description
Cutler-Hammer KT Transformers by
Eaton Corporation include several
major design improvements that
address the problems caused by nonlinear loads and harmonics. They are
designed to withstand the effects of
harmonic currents without exceeding
the temperature rating of the insulation
system. The KT design compensates
for the stresses on a transformer’s
winding insulation which prevents
insulation breakdown and premature
failure. The net result is longer
transformer life.

The neutral bus is sized and configured
to accommodate at least 200% of the
rated current. This compensates for
the increased neutral currents found in
non-linear loads thus reducing heat.

The K Factor
A common industry term for the
amount of harmonics produced by a
given load is the K Factor. The larger
the K Factor, the more harmonics are
present. Linear loads, for example
have a K Factor of 1. Transformers
may carry a K Factor rating to define
the transformer’s ability to withstand
the additional heating generated by
harmonic currents.

Calculating the K Factor
All nonlinear waveforms can be broken down mathematically into a fundamental frequency and its harmonics.
IEEE C57.110 establishes a direct
relationship between these harmonics
and transformer heating. Underwriters
Laboratories has established a similar
relation-ship, the K Factor, which is

derived by summing the square of
the percentage current at a given harmonic level multiplied by the square
of the harmonic order.
K = ∑(Ih)2(h)2
Ih = Percent Current at Harmonic h
h = Harmonic Order, i.e., 3rd, 5th, 7th
For example, a load that is 90% of the
fundamental, 30% of the third harmonic,
and 20% of the fifth harmonic would
yield (.9)2(1)2 + (.3)2(3)2 + (.2)2(5)2 or
a K Factor of 2.62. This load would
require a Cutler-Hammer KT-4 Transformer with a K Factor rating of 4.
Transformers that carry a K Factor
rating define the transformer’s ability to
withstand a given harmonic load while
operating within the transformer’s
insulation class.
An analysis of harmonic loads and
a calculation of the K Factor must be
made to properly apply transformers
in any building or facility. Note that
the calculated K Factor is not constant
since non-linear loads change
throughout the day as equipment
and lighting is turned off and on.
These harmonic loads also change
over the life of the building or facility
as equipment is added or removed.

Harmonic Currents
Harmonic currents are found in nonlinear loads. These currents are generated
by various types of equipment including switching mode power supplies
that abruptly switch current on and
off during each line cycle. Switching
mode power supplies or diodecapacitor

Design Features
Core
A high grade, nonaging, silicon steel
with high magnetic permeability provides reduced core induction levels,
preventing saturation as a result of the
higher frequency harmonics and resultant peak voltages. In a core approaching saturation, the current in the coil
will increase as voltage drops because
the core cannot absorb the additional
magnetic flux. This core also provides
reduced eddy currents or induced currents in the steel caused by the high
ratios of peak-to-rms currents and voltages found in harmonic loads.

CA08101001E

Figure 9-1. Harmonic currents found in non-linear loads cause wave shape distortion and create
added stresses on transformers.

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
K Factor Transformers

9-42

November 2003

Single- and Three-Phase
power supplies convert ac line voltage
to low voltage dc. This process accomplished by charging capacitors during
each line cycle with narrow pulses of
current that are time-coincident with
line voltage peaks. Examples of this
equipment include electronic ballasts
for fluorescent lighting,
personal computers, printers, fax
machines, electronic and medical
test equipment, uninterruptible power
supplies, and solid-state motor drives.

Standards and Certifications

Note: Nonlinear is synonymous with the
term non-sinusoidal.

Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Features, Benefits
and Functions

9

Vol. 1, Ref. No. [0342]

■
■
■
■
■
■

600 volt class standard.
Three-phase, 480∆ – 208Y/120 volt
standard.
Single-phase, 240 x 480 volt –
120/240 volt standard.
150°C rise standard, 80ºC and 115ºC
available.
Three-phase neutrals sized for 200%
of rated current.
Electrostatic shield.

Note: Electrostatic shields do not reduce
harmonic levels. However, because of the
nature of switching mode loads, these
shields do reduce transient noise in the
system which may affect sensitive computer loads.
■

Aluminum windings (copper
optional).
■ Class 220°C insulation.
■ Reduced core flux density.
Note: Reduced core flux prevents the core
from saturation and overheating due to
voltage distortions caused by harmonic
currents.
■
■
■
■
■

Indoor enclosures (weathershields
optional, for outdoor applications).
Coils designed to minimize stray
losses.
K4, K13 standard.
K9, K20, K30, K40, K50 optional.
Low sound level (-3 dB, -5 dB)
available as options.

Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Seismically Qualified

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed for
60 Hertz operation. Transformers
required for other frequencies are available and must be specifically designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one hour;
and 125% load for four hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-44. Insulation System Classification
Ambient

40°C
40°C
40°C
40°C

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer ventilated transformers,
Type KT, utilize a NEMA 2 rated (dripproof) enclosure as standard, and are
rated NEMA 3R with the addition of
weathershields.

Sound Levels
All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions Lower sound levels are
available and should be specified
when the transformer is going to be
installed in an area where sound may
be a concern.
Table 9-45. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Winding Terminations
Primary and secondary windings are
terminated in the wiring compartment.
Ventilated transformers have leads
brought out to aluminum pads that
are pre-drilled to accept Cu/Al lugs.
Lugs are not supplied with these
transformers. The Cutler-Hammer
business recommends external cables
be rated 75°C for ventilated designs.

Technical Data
and Specifications
Please refer to Page 9-122.

Product Selection
Additional Product Selection
information begins on Page 9-136.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
K Factor Transformers

9-43

November 2003

Single-Phase

Vol. 1, Ref. No. [0343]

Table 9-46. Single Phase Selection Information — Type KS-4 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 4
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

240 x 480 Volts to 120/240 Volts, Aluminum Windings














KS-4
KS-4
KS-4

150
150
150

31-1/4
31-1/4
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
17-1/2
19-1/2

147
212
306

768
768
956

428
428
574

402
402
495

67
96
139

815
816
817

261A
261A
261A

WS15
WS11
WS11

350. HT20P11S15
350. HT20P11S25
350. HT20P11S37

1,970.
2,655.
3,240.















KS-4
KS-4
KS-4

150
150
150

37-5/8
42-1/8
42-1/8

22-5/8
24
24

19-1/2
23-3/8
23-3/8

340
510
600

956
1070
1070

574
610
610

495
594
594

154
232
272

818
819
820

261A
261A
261A

WS11
WS16
WS16

350. HT20P11S50
800. HT20P11S75
800. HT20P11S99

3,830.
5,560.
6,910.

15
25
37.5















KS-4
KS-4
KS-4

115
115
115

30-1/4
31-1/4
37-5/8

16-7/8
22-5/8
22-5/8

15-7/8
17-1/2
19-1/2

147
212
306

768
768
956

428
428
574

402
402
495

67
67
139

815
816
817

261A
261A
261A

WS15
WS11
WS11

350. HT20P11F15
350. HT20P11F25
350. HT20P11F37

2,305.
3,040.
3,740.

50
75











KS-4
KS-4

115
115

37-5/8
42-1/8

22-5/8
24

19-1/2
23-3/8

340
600

956
1070

574
610

495
594

154
272

818
820

261A
261A

WS11
WS16

350. HT20P11F50
800. HT20P11F75

4,450.
6,495.

15
25
37.5















KS-4
KS-4
KS-4

80
80
80

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

212
306
340

768
956
956

428
574
574

402
495
495

67
139
154

816
817
818

261A
261A
261A

WS11
WS11
WS11

350. HT20P11B15
350. HT20P11B25
350. HT20P11B37

2,680.
3,600.
4,435.

50
75











KS-4
KS-4

80
80

42-1/8
42-1/8

24
24

23-3/8
23-3/8

510
600

1070
1070

610
610

594
594

232
272

819
820

261A
261A

WS16
WS16

800. HT20P11B50
800. HT20P11B75

5,210.
7,580.

15
25
37.5
50
75
100

240 x 480 Volts to 120/240 Volts, Copper Windings














KS-4
KS-4
KS-4

150
150
150

30-1/4
31-1/4
37-5/8

16-7/8
22-5/8
22-5/8

15-7/8
17-1/2
19-1/2

165
237
345

768
768
956

428
428
574

402
402
495

75
108
158

815
816
817

261A
261A
261A

WS15
WS11
WS11

350. HT20P11S15CU
350. HT20P11S25CU
350. HT20P11S37CU

2,760.
3,720.
4,540.















KS-4
KS-4
KS-4

150
150
150

37-5/8
42-1/8
42-1/8

22-5/8
24
24

19-1/2
23-3/8
23-3/8

381
614
700

956
1070
1070

574
610
610

495
594
594

173
279
318

818
819
820

261A
261A
261A

WS11
WS16
WS16

350. HT20P11S50CU
800. HT20P11S75CU
800. HT20P11S99CU

5,365.
7,785.
9,680.

15
25
37.5















KS-4
KS-4
KS-4

115
115
115

30-1/4
31-1/4
37-5/8

16-7/8
22-5/8
22-5/8

15-7/8
17-1/2
19-1/2

165
237
345

768
768
956

428
428
574

402
402
495

75
108
158

815
816
817

261A
261A
261A

WS15
WS11
WS11

350. HT20P11F15CU
350. HT20P11F25CU
350. HT20P11F37CU

3,230.
4,260.
5,240.

50
75











KS-4
KS-4

115
115

37-5/8
42-1/8

22-5/8
24

19-1/2
23-3/8

381
700

956
1070

574
610

495
594

173
318

818
820

261A
261A

WS11
WS16

350. HT20P11F50CU
800. HT20P11F75CU

6,230.
9,095.

15
25
37.5















KS-4
KS-4
KS-4

80
80
80

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

237
345
381

768
956
956

428
574
574

402
495
495

108
158
173

816
817
818

261A
261A
261A

WS11
WS11
WS11

350. HT20P11B15CU
350. HT20P11B25CU
350. HT20P11B37CU

3,750.
5,045.
6,210.

50
75











KS-4
KS-4

80
80

42-1/8
42-1/8

24
24

23-3/8
23-3/8

614
700

1070
1070

610
610

594
594

279
318

819
820

261A
261A

WS16
WS16

800. HT20P11B50CU
800. HT20P11B75CU

7,300.
10,615.

15
25
37.5
50
75
100




1@ +5%, 2@ -5% at 240 volt primary; 2@ +2.5%, 4@ -2.5% at 480 volt primary.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
K Factor Transformers

9-44

November 2003

Single-Phase

Vol. 1, Ref. No. [0344]

Table 9-47. Single Phase Selection Information — Type KS-13 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 13
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

240 x 480 Volts to 120/240 Volts, Aluminum Windings

9

15
25
37.5















KS-13 150
KS-13 150
KS-13 150

30-1/4
37-5/8
37-5/8

16-7/8
22-5/8
22-5/8

15-7/8
19-1/2
19-1/2

147
306
340

768
956
956

428
574
574

402
495
495

67
139
154

815
817
818

261A
261A
261A

WS15
WS11
WS11

350. NT20P11S15
350. NT20P11S25
350. NT20P11S37

2,620.
3,520.
4,320.

50
75











KS-13 150
KS-13 150

42-1/8
42-1/8

24
24

23-3/8
23-3/8

510
600

1070
1070

610
610

594
594

232
272

819
820

261A
261A

WS16
WS16

800. NT20P11S50
800. NT20P11S75

5,100.
7,400.

15
25
37.5















KS-13 115
KS-13 115
KS-13 115

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

212
306
340

768
956
956

428
574
574

402
495
495

67
139
154

816
817
818

261A
261A
261A

WS11
WS11
WS11

350. NT20P11F15
350. NT20P11F25
350. NT20P11F37

3,060.
4,050.
4,980.

50
75











KS-13 115
KS-13 115

42-1/8
42-1/8

24
24

23-3/8
23-3/8

510
600

1070
1070

610
610

594
594

232
272

819
820

261A
261A

WS16
WS16

800. NT20P11F50
800. NT20P11F75

5,920.
8,660.

15
25
37.5















KS-13
KS-13
KS-13

80
80
80

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

212
306
340

768
956
956

428
574
574

402
495
495

67
139
154

816
817
818

261A
261A
261A

WS11
WS11
WS11

350. NT20P11B15
350. NT20P11B25
350. NT20P11B37

3,560.
4,800.
5,900.

50
75











KS-13
KS-13

80
80

42-1/8
42-1/8

24
24

23-3/8
23-3/8

510
600

1070
1070

610
610

594
594

232
272

819
820

261A
261A

WS16
WS16

800. NT20P11B50
800. NT20P11B75

6,940.
10,100.

240 x 480 Volts to 120/240 Volts, Copper Windings
15
25
37.5















KS-13 150
KS-13 150
KS-13 150

30-1/4
37-5/8
37-5/8

16-7/8
22-5/8
22-5/8

15-7/8
19-1/2
19-1/2

165
345
381

768
956
956

428
574
574

402
495
495

75
158
173

815
817
818

261A
261A
261A

WS15
WS11
WS11

350. NT20P11S15CU
350. NT20P11S25CU
350. NT20P11S37CU

3,670.
4,930.
6,050.

50
75











KS-13 150
KS-13 150

42-1/8
42-1/8

24
24

23-3/8
23-3/8

614
700

1070
1070

610
610

594
594

279
318

819
820

261A
261A

WS16
WS16

800. NT20P11S50CU
800. NT20P11S75CU

7,140.
10,360.

15
25
37.5















KS-13 115
KS-13 115
KS-13 115

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

237
345
381

768
956
956

428
574
574

402
495
495

108
158
173

816
817
818

261A
261A
261A

WS11
WS11
WS11

350. NT20P11F15CU
350. NT20P11F25CU
350. NT20P11F37CU

4,285.
5,670.
6,975.

50
75











KS-13 115
KS-13 115

42-1/8
42-1/8

24
24

23-3/8
23-3/8

614
700

1070
1070

610
610

594
594

279
318

819
820

261A
261A

WS16
WS16

800. NT20P11F50CU
800. NT20P11F75CU

8,290.
12,125.

15
25
37.5















KS-13
KS-13
KS-13

80
80
80

31-1/4
37-5/8
37-5/8

22-5/8
22-5/8
22-5/8

17-1/2
19-1/2
19-1/2

237
345
381

768
956
956

428
574
574

402
495
495

108
158
173

816
817
818

261A
261A
261A

WS11
WS11
WS11

350. NT20P11B15CU
350. NT20P11B25CU
350. NT20P11B37CU

4,985.
6,720.
8,260.

50
75











KS-13
KS-13

80
80

42-1/8
42-1/8

24
24

23-3/8
23-3/8

614
700

1070
1070

610
610

594
594

279
318

819
820

261A
261A

WS16
WS16

800. NT20P11B50CU
800. NT20P11B75CU

9,720.
14,140.




1@ +5%, 2@ -5% at 240 volt primary; 2@ +2.5%, 4@ -2.5% at 480 volt primary.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
K Factor Transformers

9-45

November 2003

Three-Phase

Vol. 1, Ref. No. [0345]

Table 9-48. Type KT-4 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 4
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
230
310

765
765
765

511
511
511

359
359
359

104
104
140

FR910A
FR910A
FR912A

283B
283B
283B

WS31
WS31
WS31

350. H48M28T15A
350. H48M28T30A
350. H48M28T45A

1,850.
2,570.
3,090.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

39-3/8
39-3/8
56

26-1/8
26-1/8
31-1/4

19-1/8
19-1/8
24-1/4

480
600
1100

1000
1000
1422

663
663
793

485
485
616

217
272
499

FR914B
FR915B
FR917

283B
283B
283B

WS33
WS33
WS34

350. H48M28T75A
350. H48M28T12A
800. H48M28T49A

4,360.
5,975.
8,015.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

56
75
75

31-1/4
44-1/2
44-1/2

24-1/4
36
36

1100
2400
2800

1422
1905
1905

793
1130
1130

616
914
914

499
1088
1270

FR917
FR919
FR919

283B
292A
292A

WS34
WS35
WS35

800. H48M28T22A
1,360. H48M28T33B
1,360. H48M28T55A

11,910.
16,330.
25,060.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
230
480

765
765
1000

511
511
663

359
359
485

104
104
217

FR910A
FR910A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. H48M28F15A
350. H48M28F30A
350. H48M28F45A

2,040.
2,820.
3,400.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

663
712
793

485
585
616

272
344
499

FR915B
FR916A
FR917

283B
283B
283B

WS33
WS19
WS34

350. H48M28F75A
350. H48M28F12A
800. H48M28F49A

4,690.
6,540.
8,530.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

62-1/4
75
90

31-1/4
44-1/2
69

30-1/4
36
42

1600
2400
4500

1581
1905
2286

794
1130
1752

768
914
1066

728
1088
2041

FR918A
FR919
FR922

283B
292A
292A

WS34
WS35
WS36

800. H48M28F22A
1,360. H48M28F33A
1,360. H48M28F55A

13,040.
19,060.
27,560.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

359
359
485

104
140
217

FR910A
FR912A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. H48M28B15A
350. H48M28B30A
350. H48M28B45A

2,350.
2,970.
4,475.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

39-3/8
56
56

26-1/8
31-1/4
31-1/4

19-1/8
24-1/4
24-1/4

600
1100
1100

1000
1422
1422

663
793
793

485
616
616

272
499
499

FR915B
FR917
FR917

283B
283B
283B

WS33
WS34
WS34

350. H48M28B75A
800. H48M28B12A
800. H48M28B49A

5,680.
8,000.
11,660.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
35-3/4

1600
2400
3600

1581
1905
1905

794
1130
1129

768
914
908

728
1088
1636

FR918A
FR919
FR920

283B
292A
292A

WS34
WS35
WS35

800. H48M28B22A
1,360. H48M28B33A
1,360. H48M28B55A

16,430.
21,200.
32,480.

300
300
370

765
765
765

511
511
511

359
359
359

136
136
168

FR910A 283B
FR910A 283B
FR912A 283B

WS31
WS31
WS31

350. H48M28T15CU
350. H48M28T30CU
350. H48M28T45CU

2,260.
2,750.
3,545.

306
306
545

FR914B
FR915B
FR917

283B
283B
283B

WS33
WS33
WS34

350. H48M28T75CU
350. H48M28T12CU
800. H48M28T49CU

5,215.
6,315.
9,020.

545 FR917
283B
977 FR918A 292A
1636 FR919
292A

WS34
WS34
WS35

800. H48M28T22CU
800. H48M28T33CU
1,360. H48M28T55CU

12,510.
18,530.
26,300.

480 ∆ Volts to 208Y/120 Volts (Copper Windings)
15
30
45

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

75
112.5
150

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

150
150
150

39-3/8
39-3/8
56

26-1/8
26-1/8
31-1/4

19-1/8
19-1/8
24-1/4

675 1000
675 1000
1200 1422

663
663
793

485
485
616

225
300
500

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1200 1422
2150 1581
3600 1905

793
794
1130

616
768
914

15
30
45

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

765
765
1000

511
511
663

359
359
485

136
136
261

FR910A 283B
FR910A 283B
FR914B 283B

WS31
WS31
WS33

350. H48M28F15CU
350. H48M28F30CU
350. H48M28F45CU

2,770.
3,850.
4,635.

75
112.5
150

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

115
115
115

39-3/8
46-1/2
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

675 1000
850 1171
1200 1422

663
712
793

485
585
616

306
386
545

FR915B 283B
FR916A 283B
FR917
283B

WS33
WS19
WS34

350. H48M28F75CU
350. H48M28F12CU
800. H48M28F49CU

5,420.
7,075.
9,690.

225
300
500

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

115
115
115

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
35-3/4

2150 1581
3100 1905
3600 1905

794
1130
1129

768
914
908

977 FR918A 283B
1409 FR919
292A
1636 FR920
292A

WS34
WS35
WS35

800. H48M28F22CU
1,360. H48M28F33CU
— H48M28F55CU

15,675.
22,860.
28,940.

15
30
45

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

80
80
80

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

765
765
1000

511
511
663

359
359
485

136
168
261

FR910A 283B
FR912A 283B
FR914B 283B

WS31
WS31
WS33

350. H48M28B15CU
350. H48M28B30CU
350. H48M28B45CU

3,145.
4,360.
5,370.

75
112.5
150

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

80
80
80

39-3/8
56
56

26-1/8
31-1/4
31-1/4

19-1/8
24-1/4
24-1/4

675 1000
1200 1422
1200 1422

663
793
793

485
616
616

306
545
545

FR915B
FR917
FR917

283B
283B
283B

WS33
WS34
WS34

350. H48M28B75CU
800. H48M28B12CU
800. H48M28B49CU

6,760.
9,240.
12,060.

225
300
500

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

80
80
80

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
35-3/4

2150 1581
3100 1905
3600 1905

794
1130
1129

768
914
908

977 FR918A 283B
1409 FR919
292A
1636 FR920
292A

WS34
WS35
WS35

800. H48M28B22CU
1,360. H48M28B33CU
1,360. H48M28B55CU

18,050.
26,100.
34,200.

300
300
575

300
370
575

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.
Note: For Energy Star labeled K factor transformers, contact your local Cutler-Hammer sales office.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
K Factor Transformers

9-46

November 2003

Three-Phase

Vol. 1, Ref. No. [0346]

Table 9-49. Type KT-13 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 13
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts

9

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

359
359
485

104
140
217

FR910A
FR912A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. N48M28T15A
350. N48M28T30A
350. N48M28T45A

1,970.
2,845.
3,370.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

663
712
793

485
585
616

272
344
499

FR915B
FR916A
FR917

283B
283B
283B

WS33
WS19
WS34

350. N48M28T75A
350. N48M28T12A
800. N48M28T49A

4,660.
6,535.
8,780.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

62-1/4
75
90

31-1/4
44-1/2
69

30-1/4
36
42

1600
2400
4500

1581
1905
2286

794
1130
1752

768
914
1066

728
1088
2041

FR918A
FR919
FR922

283B
292A
292A

WS34
WS35
WS36

800. N48M28T22A
1,360. N48M28T33A
1,360. N48M28T55A

12,140.
17,870.
27,570.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

359
359
485

104
140
217

FR910A
FR912A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. N48M28F15A
350. N48M28F30A
350. N48M28F45A

2,410.
2,985.
3,890.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

663
712
793

485
585
616

272
344
499

FR915B
FR916A
FR917

283B
283B
283B

WS33
WS19
WS34

350. N48M28F75A
350. N48M28F12A
800. N48M28F49A

5,315.
8,120.
9,560.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

62-1/4
75
90

31-1/4
44-1/2
69

30-1/4
36
42

1600
2400
4500

1581
1905
2286

794
1130
1752

768
914
1066

728
1088
2041

FR918A
FR919
FR922

283B
292A
292A

WS34
WS35
WS36

800. N48M28F22A
1,360. N48M28F33A
1,360. N48M28F55A

13,390.
20,100.
30,400.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

359
359
485

104
140
217

FR910A
FR912A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. N48M28B15A
350. N48M28B30A
350. N48M28B45A

2,840.
3,730.
4,755.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

46-1/8
56
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

760
1100
1600

1171
1422
1581

712
793
794

585
616
768

344
499
728

FR916A
FR917
FR918A

283B
283B
283B

WS33
WS34
WS34

350. N48M28B75A
350. N48M28B12A
800. N48M28B49A

6,160.
8,840.
12,565.

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT

80
80

75
75

44-1/2
44-1/2

36
36

2400
3600

1905
1905

1130
1130

914
914

1088
1636

FR919
FR919

292A
292A

WS35
WS35

1,360. N48M28B22A
1,360. N48M28B33CU

17,140.
26,780.

480 ∆ Volts to 208Y/120 Volts (Copper Windings)
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
575

65
765
1000

511
511
663

359
359
485

136
168
261

FR910A
FR912A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. N48M28T15CU
350. N48M28T30CU
350. N48M28T45CU

2,540.
2,890.
4,270.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

675
850
1200

1000
1171
1422

663
712
793

485
585
616

306
386
545

FR915B
FR916A
FR917

283B
283B
283B

WS33
WS19
WS34

350. N48M28T75CU
350. N48M28T12CU
800. N48M28T49CU

5,690.
7,460.
9,770.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

62-1/4
75

31-1/4
44-1/2

30-1/4
36

2150
3100

1581
1905

794
1130

768
914

977
1409

FR918A
FR919

283B
292A

WS34
WS35

800. N48M28T22CU
1,360. N48M28T33CU
— N48M28T55CU 

13,440.
22,330.
28,930.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
575

65
765
1000

511
511
663

359
359
485

136
168
261

FR910A
FR912A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. N48M28F15CU
350. N48M28F30CU
350. N48M28F45CU

2,785.
3,295.
4,430.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

675
850
1200

1000
1171
1422

663
712
793

485
585
616

360
386
545

FR915B
FR916A
FR917

283B
283B
283B

WS33
WS19
WS34

350. N48M28F75CU
350. N48M28F12CU
800. N48M28F49CU

6,290.
9,025.
11,950.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

62-1/4
75

31-1/4
44-1/2

30-1/4
36

2150
3100

1581
1905

794
1130

768
914

977
1409

FR918A
FR919

283B
292A

WS34
WS35

800. N48M28F22CU
1,360. N48M28F33CU
— N48M28F55CU 

16,300.
24,560.
31,850.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
575

65
765
1000

511
511
663

359
359
485

136
168
261

FR910A
FR912A
FR914B

283B
283B
283B

WS31
WS31
WS33

350. N48M28B15CU
350. N48M28B30CU
350. N48M28B45CU

3,125.
4,140.
5,570.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

46-1/8
56
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

950
1200
2150

1171
1422
1581

712
793
794

585
616
768

431
545
977

FR916A
FR917
FR917

283B
283B
283B

WS33
WS34
WS34

350. N48M28B75CU
350. N48M28B12CU
800. N48M28B49CU

7,100.
10,270.
13,480.

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT

80
80

75
75

44-1/2
44-1/2

36
36

3100
3600

1905
1905

1130
1130

914
914

1409
1636

FR919
FR919

292A
292A

WS35
WS35

1,360. N48M28B22CU
1,360. N48M28B33CU

20,520.
26,780.







































































Refer to your Cutler-Hammer sales office.
Not Seismic Qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.
Note: For Energy Star labeled K factor transformers, contact your local Cutler-Hammer sales office.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
K Factor Transformers

9-47

November 2003

Three-Phase

Vol. 1, Ref. No. [0347]

Table 9-50. Type KT-20 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 20
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts
15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

358
358
485

104 FR910A
140 FR912A
217 FR914B

283B
283B
283B

WS31
WS31
WS33

350. G48M28T15A
350. G48M28T30A
350. G48M28T45A

2,050.
3,010.
3,960.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

663
712
793

485
585
616

272 FR915B
344 FR916A
499 FR917

283B
283B
283B

WS33
WS19
WS34

350. G48M28T75A
350. G48M28T12A
800. G48M28T49A

5,600.
8,780.
9,860.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

150
150
150

62-1/4
75

31-1/4
44-1/2

30-1/4
36

1600
2400

1581
1905

794
1130

768
914

728 FR918A
1088 FR919

283B
292A

WS34
WS35

800. G48M28T22A
1,360. G48M28T33A
— G48M28T55A 

13,420.
18,530.
30,700.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
663

358
358
485

104 FR910A
140 FR912A
217 FR914B

283B
283B
283B

WS31
WS31
WS33

350. G48M28F15A
350. G48M28F30A
350. G48M28F45A

2,655.
3,460.
4,560.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

46-1/8
56
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

780
1100
1600

1171
1422
1581

712
793
794

585
616
768

354 FR916A
499 FR917
728 FR918A

283B
283B
283B

WS33
WS34
WS34

350. G48M28F75A
350. G48M28F12A
800. G48M28F49A

6,440.
9,220.
10,850.

225
300
500

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

115
115
115

75
75

44-1/2
44-1/2

36
36

2400
3100

1905
1905

1130
1130

914
914

283B
292A

WS35
WS35

800. G48M28F22A
1,360. G48M28F33A
— G48M28F55A 

15,600.
20,650.
35,300.

15
30
45

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

230
480
600

765
1000
1000

511
663
663

358
485
485

140 FR912A
217 FR914B
272 FR915B

283B
283B
283B

WS31
WS31
WS31

350. G48M28B15A
350. G48M28B30A
350. G48M28B45A

2,990.
4,060.
5,350.

75
112.5
150

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT
KT

80
80
80

46-1/8
56
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

860
1100
1600

1171
1422
1581

712
793
794

585
616
768

389 FR916A
499 FR917
728 FR918A

283B
283B
283B

WS33
WS34
WS34

350. G48M28B75A
350. G48M28B12A
800. G48M28B49A

7,560.
9,860.
13,400.

225
300

2@+2.5% 4@-2.5%
2@+2.5% 4@-2.5%

KT
KT

80
80

75

44-1/2

36

2400

1905

1130

914

283B

WS35



800. G48M28B22A
— G48M28B33A 

19,800.
25,700.






































































1088 FR919
1315 FR920






1088 FR919





















480 ∆ Volts to 208Y/120 Volts (Copper Windings)
15
30
45

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

150
150
150

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
575

765
765
1000

511
511
663

358
358
485

136 FR910A
168 FR912A
261 FR914B

283B
283B
283B

WS31
WS31
WS33

350. G48M28T15CU
350. G48M28T30CU
350. G48M28T45CU

2,770.
4,120.
5,430.

75
112.5
150

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

150
150
150

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

675
850
1200

1000
1171
1422

663
712
793

485
585
616

306 FR915B
386 FR916A
545 FR917

283B
283B
283B

WS33
WS19
WS34

350. G48M28T75CU
350. G48M28T12CU
800. G48M28T49CU

7,660.
11,400.
12,820.

225
300
500

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

150
150
150

62-1/4
75

31-1/4
44-1/2

30-1/4
36

2150
3100

1581
1905

794
1130

768
914

977 FR918A
1409 FR919

283B
292A

WS34
WS35

800. G48M28T22CU
1,360. G48M28T33CU
— G48M28T55CU 

17,400.
24,560.
39,900.

15
30
45

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
575

765
765
1000

511
511
663

358
358
485

136 FR910A
168 FR912A
261 FR914B

283B
283B
283B

WS31
WS31
WS33

350. G48M28F15CU
350. G48M28F30CU
350. G48M28F45CU

3,180.
4,665.
6,140.

75
112.5
150

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

115
115
115

46-1/8
56
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

780
1200
2150

1171
1422
1581

712
793
794

585
616
768

354 FR916A
545 FR917
977 FR918A

283B
283B
283B

WS33
WS34
WS34

350. G48M28F75CU
350. G48M28F12CU
800. G48M28F49CU

8,680.
12,300.
13,800.

225
300
500

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

115
115
115

75
75

44-1/2
44-1/2

36
36

3100
3600

1905
1905

1130
1130

914
914

283B
292A

WS35
WS35

800. G48M28F22CU
1,360. G48M28F33CU
— G48M28F55CU 

18,800.
27,000.
46,000.

15
30
45

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

80
80
80

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

370
575
675

765
1000
1000

511
663
663

358
485
485

168 FR912A
261 FR914B
306 FR915B

283B
283B
283B

WS31
WS31
WS33

350. G48M28B15CU
350. G48M28B30CU
350. G48M28B45CU

3,480.
5,270.
6,740.

75
112.5
150

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

80
80
80

46-1/8
56
62-1/4

28
31-1/4
31-1/4

23
24-1/4
30-1/4

860
1200
2150

1171
1422
1581

712
793
794

585
616
768

389 FR916A
545 FR917
977 FR918A

283B
283B
283B

WS33
WS34
WS34

350. G48M28B75CU
350. G48M28B12CU
800. G48M28B49CU

9,520.
14,050.
15,780.

225
300

2@+2.5% 4@-2.5% KT
2@+2.5% 4@-2.5% KT

80
80

75

44-1/2

36

3100

1905

1130

914

292A

WS35

1,360. G48M28B22CU
— G48M28B33CU 

21,470.
29,650.










































































1409 FR919
1636 FR920






1409 FR919
























Refer to your Cutler-Hammer sales office.
Not Seismic Qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.
Note: For Energy Star labeled K factor transformers, contact your local Cutler-Hammer sales office.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
K Factor Transformers

9-48

November 2003

Three-Phase

Vol. 1, Ref. No. [0348]

Table 9-51. Type KT-4 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 4
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

208 ∆ Volts to 208Y/120 Volts
15
30
45
75
112.5
150
225
300
15
30
45
75
112.5
150
225
300

9

15
30
45
75
112.5
150
225

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

150
150
150
150

30-1/8
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

1@+5%
1@+5%
1@+5%
—

2@-5%
2@-5%
2@-5%
2@-5%

KT
KT
KT
KT

150
150
150
150

39-3/8
56
62-1/4
75

26-1/8
31-1/4
31-1/4
44-1/2

19-1/8
24-1/4
30-1/4
36

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

115
115
115
115

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

1@+5%
1@+5%
1@+5%
—

2@-5%
2@-5%
2@-5%
2@-5%

KT
KT
KT
KT

115
115
115
115

46-1/8
56
62-1/4
75

28
31-1/4
31-1/4
44-1/2

23
24-1/4
30-1/4
36

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

80
80
80
80

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

1@+5%
1@+5%
1@+5%

2@-5%
2@-5%
2@-5%

KT
KT
KT

80
80
80

56
56
75

31-1/4
31-1/4
44-1/2

230 765
230 765
310 765
480 1000

511
511
511
664

359
359
359
486

104
104
141
218

FR910A
FR910A
FR912A
FR914B

283A
283A
283A
283A

WS31
WS31
WS31
WS33

350.
350.
350.
350.

H29M28T15A
H29M28T30A
H29M28T45A
H29M28T75A

2,590.
3,590.
4,320.
6,100.

1000
1422
1581
1905

664
794
794
1130

486
616
768
914

273
499
728
1089

FR915B
FR917
FR918A
FR919

325A
287A
287A
297B

WS33
WS34
WS34
WS35

350.
800.
800.
1,360.

H29R28T12A
H29R28T49A
H29R28T22A
H29G28T33A

7,940.
11,200.
16,670.
22,800.

230 765
230 765
480 1000
600 1000

511
511
664
664

359
359
486
486

104
104
218
273

FR910A
FR910A
FR914B
FR915B

283A
283A
283A
283A

WS31
WS31
WS33
WS33

350.
350.
350.
350.

H29M28F15A
H29M28F30A
H29M28F45A
H29M28F75A

2,850.
3,940.
4,750.
6,550.

1171
1422
1581
1905

712
794
794
1130

585
616
768
914

345
499
728
1089

FR916A
FR917
FR918A
FR919

325A
287A
287A
297B

WS19
WS34
WS34
WS35

350.
800.
800.
1,360.

H29R28F12A
H29R28F49A
H29R28F22A
H29G28F33A

9,150.
11,900.
18,200.
26,600.

14-1/8
14-1/8
19-1/8
19-1/8

230 765
310 765
480 1000
600 1000

511
511
664
664

359
359
486
486

104
141
218
273

FR910A
FR912A
FR914B
FR915B

283A
283A
283A
283A

WS31
WS31
WS33
WS33

350.
350.
350.
350.

H29M28B15A
H29M28B30A
H29M28B45A
H29M28B75A

3,290.
4,150.
6,260.
7,950.

24-1/4
24-1/4
36

1100 1422
1100 1422
2400 1905

794
794
1130

616
616
914

287A
287A
297B

WS34
WS34
WS35

800. H29R28B12A
800. H29R28B49A
— H29R28B22A

11,100.
16,300.
23,000.

600
1100
1600
2400

760
1100
1600
2400

499 FR917
499 FR917
1089 FR919

Table 9-52. Type KT-13 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 13
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

208 ∆ Volts to 208Y/120 Volts
15
30
45
75
112.5
150
225
300
15
30
45
75
112.5
150
225
300
15
30
45
75
112.5
150
225

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

150
150
150
150

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

1@+5%
1@+5%
1@+5%
—

2@-5%
2@-5%
2@-5%
2@-5%

KT
KT
KT
KT

150
150
150
150

46-1/8
56
62-1/4
75

28
31-1/4
31-1/4
44-1/2

23
24-1/4
30-1/4
36

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

115
115
115
115

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

1@+5%
1@+5%
1@+5%
—

2@-5%
2@-5%
2@-5%
2@-5%

KT
KT
KT
KT

115
115
115
115

46-1/8
56
62-1/4
75

28
31-1/4
31-1/4
44-1/2

23
24-1/4
30-1/4
36

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

80
80
80
80

30-1/8
30-1/8
39-3/8
46-1/8

20-1/8
20-1/8
26-1/8
28

1@+5%
1@+5%
—

2@-5%
2@-5%
2@-5%

KT
KT
KT

80
80
80

56
62-1/4
75

31-1/4
31-1/4
44-1/2

230 765
310 765
480 1000
600 1000

511
511
664
664

359
359
486
486

104
141
218
273

FR910A
FR912A
FR914B
FR915B

283A
283A
283A
283A

WS31
WS31
WS33
WS33

350.
350.
350.
350.

N29M28T15A
N29M28T30A
N29M28T45A
N29M28T75A

2,760.
3,980.
4,720.
6,520.

1171
1422
1581
1905

712
794
794
1130

585
616
768
914

372
499
728
1089

FR916A
FR917
FR918A
FR919

287A
287A
287A
297B

WS19
WS34
WS34
WS35

350.
800.
800.
1,360.

N29R28T12A
N29R28T49A
N29R28T22A
N29G28T33A

9,150.
12,300.
17,000.
25,000.

230 765
310 765
480 1000
600 1000

511
511
664
664

359
359
486
486

104
141
218
273

FR910A
FR912A
FR914B
FR915B

283A
283A
283A
283A

WS31
WS31
WS33
WS33

350.
350.
350.
350.

N29M28F15A
N29M28F30A
N29M28F45A
N29M28F75A

3,175.
4,580.
5,430.
7,500.

1171
1422
1581
1905

712
794
794
1130

585
616
768
914

389
499
728
1089

FR916A
FR917
FR918A
FR919

287A
287A
287A
297B

WS19
WS34
WS34
WS35

350.
800.
800.
1,360.

N29R28F12A
N29R28F49A
N29R28F22A
N29G28F33A

10,520.
14,150.
19,550.
28,700.

14-1/8
14-1/8
19-1/8
23

230 765
310 765
480 1000
820 1171

511
511
664
712

359
359
486
585

104
141
218
389

FR910A
FR912A
FR914B
FR916A

283A
283A
283A
283A

WS31
WS31
WS33
WS33

350.
350.
350.
350.

N29M28B15A
N29M28B30A
N29M28B45A
N29M28B75A

3,720.
5,370.
6,370.
8,800.

24-1/4
30-1/4
36

1200 1422
1600 1581
2400 1905

794
794
1130

616
768
914

544 FR917
728 FR918A
1089 FR919

287A
287A
297B

WS34
WS34
WS35

350. N29R28B12A
800. N29R28B49A
1,360. N29G28B22A

12,350.
16,600.
22,900.

820
1100
1600
2400

860
1100
1600
2400

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.
Note: For Energy Star labeled K factor transformers, contact your local Cutler-Hammer sales office.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
K Factor Transformers

9-49

November 2003

Three-Phase

Vol. 1, Ref. No. [0349]

Table 9-53. Type KT-4 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 4
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 480Y/277 Volts
15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

150
150
150
150

30-1/8
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

230
230
310
480

765
765
765
1000

511
511
511
664

359
359
359
486

104
104
141
218

FR910A
FR910A
FR912A
FR914B

283B
283B
283B
283B

WS31
WS31
WS31
WS33

350.
350.
350.
350.

H48M47T15A
H48M47T30A
H48M47T45A
H48M47T75A

2,220.
3,100.
3,700.
5,230.

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

150
150
150
150

39-3/8
56
62-1/4
75

26-1/8
31-1/4
31-1/4
44-1/2

19-1/8
24-1/4
30-1/4
36

600
1100
1600
2400

1000
1422
1581
1905

664
794
794
1130

486
616
768
914

273
499
728
1089

FR915B
FR917
FR918A
FR919

283B
283B
283B
292A

WS33
WS34
WS34
WS35

350.
800.
800.
1,360.

H48M47T12A
H48M47T49A
H48M47T22A
H48M47T33A

7,170.
9,610.
14,290.
19,590.

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

115
115
115
115

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

230
230
480
600

765
765
1000
1000

511
511
664
664

359
359
486
486

104
104
218
273

FR910A
FR910A
FR914B
FR915B

283B
283B
283B
283B

WS31
WS31
WS33
WS33

350.
350.
350.
350.

H48M47F15A
H48M47F30A
H48M47F45A
H48M47F75A

2,550.
3,560.
4,250.
6,010.

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

115
115
115
115

46-1/8
56
62-1/4
75

28
31-1/4
31-1/4
44-1/2

23
24-1/4
30-1/4
36

960
1100
1600
2400

1171
1422
1581
1905

712
794
794
1130

585
616
768
914

434
499
728
1089

FR916A
FR917
FR918A
FR919

283B
283B
283B
292A

WS19
WS34
WS34
WS35

350.
800.
800.
1,360.

H48M47F12A
H48M47F49A
H48M47F22A
H48M47F33A

8,250.
11,060.
16,440.
22,540.

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

80
80
80
80

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

230
310
480
600

765
765
1000
1000

511
511
664
664

359
359
486
486

104
141
218
273

FR910A
FR912A
FR914B
FR915B

283B
283B
283B
283B

WS31
WS31
WS33
WS33

350.
350.
350.
350.

H48M47B15A
H48M47B30A
H48M47B45A
H48M47B75A

2,995.
4,185.
4,990.
7,050.

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

80
80
80
80

56
56
62-1/4
75

31-1/4
31-1/4
31-1/4
44-1/2

24-1/4
24-1/4
30-1/4
36

1100
1100
1600
2400

1422
1422
1581
1905

794
794
794
1130

616
616
768
914

499
499
728
1089

FR917
FR917
FR918A
FR919

283B
283B
283B
292A

WS34
WS34
WS34
WS35

800.
800.
800.
1,360.

H48M47B12A
H48M47B49A
H48M47B22A
H48M47B33A

9,680.
12,970.
19,290.
26,440.

Table 9-54. Type KT-13 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 13
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt. Dimensions (mm) Wt.
Lbs. H
kg
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 480Y/277 Volts
15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

150
150
150
150

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

150
150
150
150

46-1/8
56
62-1/4
75

28
31-1/4
31-1/4
44-1/2

23
24-1/4
30-1/4
36

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

115
115
115
115

30-1/8
30-1/8
39-3/8
39-3/8

20-1/8
20-1/8
26-1/8
26-1/8

14-1/8
14-1/8
19-1/8
19-1/8

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

115
115
115
115

46-1/8
56
62-1/4
75

28
31-1/4
31-1/4
44-1/2

23
24-1/4
30-1/4
36

15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

80
80
80
80

30-1/8
30-1/8
39-3/8
46-1/8

20-1/8
20-1/8
26-1/8
28

14-1/8
14-1/8
19-1/8
23

112.5
150
225
300

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

KT
KT
KT
KT

80
80
80
80

56
62-1/4
75
75

31-1/4
31-1/4
44-1/2
44-1/2

24-1/4
30-1/4
36
36

230 765
310 765
480 1000
600 1000

511
511
664
664

359
359
486
486

104
141
218
273

FR910A
FR912A
FR914B
FR915B

283B
283B
283B
283B

WS31
WS31
WS33
WS33

350.
350.
350.
350.

N48M47T15A
N48M47T30A
N48M47T45A
N48M47T75A

2,360.
3,415.
4,040.
5,590.

1171
1422
1581
1905

712
794
794
1130

585
616
768
914

345
499
728
1089

FR916A
FR917
FR918A
FR919

283B
283B
283B
292A

WS19
WS34
WS34
WS35

350.
800.
800.
1,360.

N48M47T12A
N48M47T49A
N48M47T22A
N48M47T33A

7,840.
10,530.
14,560.
21,440.

230 765
310 765
480 1000
600 1000

511
511
664
664

359
359
486
486

104
141
218
273

FR910A
FR912A
FR914B
FR915B

283B
283B
283B
283B

WS31
WS31
WS33
WS33

350.
350.
350.
350.

N48M47F15A
N48M47F30A
N48M47F45A
N48M47F75A

2,715.
3,930.
4,650.
6,430.

1171
1422
1581
1905

712
794
794
1130

585
616
768
914

345
499
728
1089

FR916A
FR917
FR918A
FR919

283B
283B
283B
292A

WS19
WS34
WS34
WS35

350.
800.
800.
1,360.

N48M47F12A
N48M47F49A
N48M47F22A
N48M47F33A

9,020.
12,120.
16,750.
24,670.

230 765
310 765
480 1000
760 1171

511
511
664
712

359
359
486
585

104
141
218
345

FR910A
FR912A
FR914B
FR916A

283B
283B
283B
283B

WS31
WS31
WS33
WS33

350.
350.
350.
350.

N48M47B15A
N48M47B30A
N48M47B45A
N48M47B75A

3,180.
4,600.
5,450.
7,540.

794
794
1130
1130

616
768
914
914

499
728
1089
1636

FR917
FR918A
FR919
FR919

283B
283B
292A
292A

WS34
WS34
WS35
WS35

350.
800.
1,360.
1,360.

760
1100
1600
2400

760
1100
1600
2400

1100
1600
2400
3600

1422
1581
1905
1905

N48M47B12A
N48M47B49A
N48M47B22A
N48M47B33CU

10,580.
14,200.
19,650.
36,440.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.
Note: For Energy Star labeled K factor transformers, contact your local Cutler-Hammer sales office.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Drive Isolation Transformers

9-50

November 2003

Three-Phase

Three-Phase, Type MD, 60 Hz

Vol. 1, Ref. No. [0350]

Features, Benefits
and Functions

Options and Accessories

■

■

■
■
■

■

Type MD

9

■

Product Description
■

Suitable for indoor or outdoor
applications (with weathershield).
■ Ventilated enclosures.
■ 220°C Insulation system, 150°C Rise
standard (self extinguishing).
■ Available in ratings from
7.5 through 1500 kVA.

■

■
■

Application Description
Drive isolation transformers are specifically designed for use with ac and dc
adjustable speed drives. Two winding
drive isolation transformers provide:

■
■
■

■

Electrical isolation between the
incoming line and the drive circuitry.
■ Voltage conversion of input line to
standard drive input voltages.
■ Minimized line disturbances
caused by SCR (silicon controlled
rectifiers) firing.
■ Reduced short circuit currents and
voltage line transients.
Drive isolation transformers are
specifically sized to the drive kVA
requirements and are braced to
withstand the mechanical stresses
of current reversals and short circuits
associated with SCR drives.







■

UL listed.
60 Hz operation
(50/60 Hz operation available).
Short-term overload capability as
required by ANSI.
Primary and secondary terminals
are front accessible for fast and
easy connection.
Slotted screw mounting holes
in enclosure and cover reduce
installation time.
Sound dampening pads, which
isolate the core and coil from the
case, reduce noise levels to meet
NEMA ST-20.
Core laminations of precision
sheared grain oriented silicon steel
are hand stacked to insure quiet
operation.
Terminations are clearly marked for
easy identification.
Three-phase transformers have
one 5% full capacity tap above and
below nominal voltage for incoming
source adjustment.
Units are suitable for continuous operation in a 40°C ambient maximum.
Full current neutral.
Thermoguard protection embedded
in coils to indicate that high temperatures (approximately 190°C) are
present.
Three coil delta-wye configurations
are used throughout the product line.

Standards and Certifications
■

ANSI C89.2
■ NEMA ST-20
■ UL 506
■ UL 1561

Seismic Qualified
All Cutler-Hammer manufactured drytype distribution transformers by
Eaton Corporation are seismically
qualified, and exceed requirements of
the Uniform Building Code (UBC) and
California Code Title 24.

For more information visit: www.cutler-hammer.eaton.com

■
■
■
■
■
■

Copper windings.
Non-standard voltages.
50/60 Hz designs.
Delta-delta configuration.
80°C or 115°C rise designs.
Totally enclosed non-ventilated.
Electrostatic shields.

Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-55. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

CA08101001E

Transformers
Drive Isolation Transformers

9-51

November 2003

Three-Phase

Vol. 1, Ref. No. [0351]

Enclosures

Sound Levels

Winding Terminations

Eaton’s Cutler-Hammer ventilated
transformers, Type MD, utilize a NEMA
2 rated (drip-proof) enclosure as standard, and are rated NEMA 3R with the
addition of weathershields.

All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to
be installed in an area where sound
may be a concern.

Primary and secondary windings are
terminated in the wiring compartment.
Ventilated transformers have leads
brought out to aluminum pads that
are pre-drilled to accept Cu/Al lugs.
Lugs are not supplied with these
transformers. The Cutler-Hammer
business recommends external cables
be rated 75°C for ventilated designs.

Table 9-56. Average Sound Levels

Technical Data
and Specifications
Please refer to Page 9-122.

NEMA ST-20 Average Sound Level (dB)
kVA

CA08101001E

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

For more information visit: www.cutler-hammer.eaton.com

9







Transformers
Drive Isolation Transformers

9-52

November 2003

Three-Phase

Vol. 1, Ref. No. [0352]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-57. Drive Isolation Transformers
Hp

kVA Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt.
Lbs.

Dimensions (mm) Wt.
kg
H
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

FR909
FR909
FR909

286L
286L
286L

WS31
WS31
WS31

350. MD075E85
350. MD11E85
350. MD14E85

1,400.
1,450.
1,550.

Price
U.S. $

208 ∆ Volts to 230Y/133 Volts

9

5
7.5
10

7.5
11
14

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

25
25
25

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
152
152

635
635
635

511
511
511

358
358
358

69
69
69

15
20
25

20
27
34

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
230
310

765
765
765

511
511
511

358
358
358

104
104
140

FR910A
FR910A
FR912A

286L
286L
286L

WS31
WS31
WS31

350. MD20E85
350. MD27E85
350. MD34E85

1,920.
2,195.
2,430.

30
40
50

40
51
63

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
480

765
1000
1000

511
663
663

358
485
485

140
217
217

FR912A
FR914B
FR914B

286L
286L
286L

WS31
WS33
WS33

350. MD40E85
350. MD51E85
350. MD63E85

2,800.
3,165.
3,580.

60
75
100

75
93
118

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

485
485
585

217
272
344

FR914B
FR915B
FR916A

286L
286L
286L

WS33
WS33
WS19

350. MD75E85
350. MD93E85
350. MD118E85

3,875.
4,650.
5,440.

125
150
200

145
175
220

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

46-1/8
56
56

28
31-1/4
31-1/4

23
24-1/4
24-1/4

760
1100
1200

1171
1422
1422

712
793
793

585
616
616

344
499
499

FR916A
FR917
FR917

286L
286L
286L

WS19
WS34
WS34

350. MD145E85
800. MD175E85
800. MD220E85

6,350.
8,030.
9,300.

250
300

275
330

1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3

150
150

62-1/4
75

31-1/4
44-1/2

30-1/4
36

1600
2200

1581
1905

794
1130

768
914

728
1000

FR918A
FR919

286L



WS34
WS35

800. MD275E85
1,360. MD330E85

10,880.
12,925.

FR909
FR909
FR909

286L
286L
286L

WS31
WS31
WS31

350. MD075E86
350. MD11E86
350. MD14E86

1,400.
1,450.
1,550.

208 ∆ Volts to 460Y/266 Volts
5
7.5
10

7.5
11
14

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

25
25
25

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
152
152

635
635
635

511
511
511

358
358
358

69
69
69

15
20
25

20
27
34

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
230
310

765
765
765

511
511
511

358
358
358

104
104
140

FR910A
FR910A
FR912A

286L
286L
286L

WS31
WS31
WS31

350. MD20E86
350. MD27E86
350. MD34E86

1,920.
2,195.
2,430.

30
40
50

40
51
63

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
480

765
1000
1000

511
663
663

358
485
485

140
217
217

FR912A
FR914B
FR914B

286L
286L
286L

WS31
WS33
WS33

350. MD40E86
350. MD51E86
350. MD63E86

2,800.
3,165.
3,580.

60
75
100

75
93
118

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

485
485
585

217
272
344

FR914B
FR915B
FR916A

286L
286L
286L

WS33
WS33
WS19

350. MD75E86
350. MD93E86
350. MD118E86

3,875.
4,650.
5,440.

125
150
200

145
175
220

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

46-1/8
56
56

28
31-1/4
31-1/4

23
24-1/4
24-1/4

760
1100
1200

1171
1422
1422

712
793
793

585
616
616

344
499
499

FR916A
FR917
FR917

286L
286L
286L

WS19
WS34
WS34

350. MD145E86
800. MD175E86
800. MD220E86

6,350.
8,030.
9,300.

250
300

275
330

1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3

150
150

62-1/4
75

31-1/4
44-1/2

30-1/4
36

1600
2200

1581
1905

794
1130

768
914

728
1000

FR918A
FR919

286L



WS34
WS35

800. MD275E86
1,360. MD330E86

10,880.
12,925.

FR909
FR909
FR909

286A
286A
286A

WS31
WS31
WS31

350. MD075E88
350. MD11E88
350. MD14E88

1,400.
1,450.
1,550.

230 ∆ Volts to 230Y/133 Volts
5
7.5
10

7.5
11
14

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

25
25
25

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
152
152

635
635
635

511
511
511

358
358
358

69
69
69

15
20
25

20
27
34

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
230
310

765
765
765

511
511
511

358
358
358

104
104
140

FR910A
FR910A
FR912A

286A
286A
286A

WS31
WS31
WS31

350. MD20E88
350. MD27E88
350. MD34E88

1,920.
2,195.
2,430.

30
40
50

40
51
63

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
480

765
1000
1000

511
663
663

358
485
485

140
217
217

FR912A
FR914B
FR914B

286A
286A
286A

WS31
WS33
WS33

350. MD40E88
350. MD51E88
350. MD63E88

2,800.
3,165.
3,580.

60
75
100

75
93
118

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

485
485
585

217
272
344

FR914B
FR915B
FR916A

286A
286A
286A

WS33
WS33
WS19

350. MD75E88
350. MD93E88
350. MD118E88

3,875.
4,650.
5,440.

125
150
200

145
175
220

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

46-1/8
56
56

28
31-1/4
31-1/4

23
24-1/4
24-1/4

760
1100
1200

1171
1422
1422

712
793
793

585
616
616

344
499
499

FR916A
FR917
FR917

286A
286A
286A

WS19
WS34
WS34

350. MD145E88
800. MD175E88
800. MD220E88

6,350.
8,030.
9,300.

250
300
400

275
330
440

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75

31-1/4
44-1/2

30-1/4
36

1600
2200

1581
1905

794
1130

768
914

728
1000

FR918A
FR919

286A









WS34
WS35

800. MD275E88
1,360. MD330E88
— MD440E88 

10,880.
12,925.
18,900.

500
600
700
800

550
660
770
880

1@+5%
1@+5%
1@+5%
1@+5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150



























































































MD550E88 
MD660E88 
MD770E88 
MD880E88 

22,800.
27,600.
34,400.
39,300.





1@-5%
1@-5%
1@-5%
1@-5%





































—
—
—
—

Refer to your Cutler-Hammer sales office.
Not Seismic Qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Drive Isolation Transformers

9-53

November 2003

Three-Phase

Vol. 1, Ref. No. [0353]

Table 9-58. Drive Isolation Transformers
Hp

kVA Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt.
Lbs.

Dimensions (mm) Wt.
kg
H
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

230 ∆ Volts to 460Y/266 Volts
5
7.5
10
15

7.5
11
14
20

1@+5%
1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
25
25
30-1/8

20-1/8
20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8
14-1/8

152
152
152
230

635
635
635
765

511
511
511
511

358
358
358
358

69
69
69
104

FR909
FR909
FR909
FR910A

286A
286A
286A
286A

WS31
WS31
WS31
WS31

350.
350.
350.
350.

20
25
30

27
34
40

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
310
310

765
765
765

511
511
511

358
358
358

104
140
140

FR910A
FR912A
FR912A

286A
286A
286A

WS31
WS31
WS31

350. MD27E89
350. MD34E89
350. MD40E89

2,195.
2,430.
2,800.

40
50
60

51
63
75

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
39-3/8

26-1/8
26-1/8
26-1/8

19-1/8
19-1/8
19-1/8

480
480
480

1000
1000
1000

663
663
663

485
485
485

217
217
217

FR914B
FR914B
FR914B

286A
286A
286A

WS33
WS33
WS33

350. MD51E89
350. MD63E89
350. MD75E89

3,165.
3,580.
3,875.

75
100
125

93
118
145

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
46-1/8

26-1/8
28
28

19-1/8
23
23

600
760
760

1000
1171
1171

663
712
712

485
585
585

272
344
344

FR915B
FR916A
FR916A

286A
286A
286A

WS33
WS33
WS19

350. MD93E89
350. MD118E89
350. MD145E89

4,650.
5,440.
6,350.

150
200
250

175
220
275

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

56
56
62-1/4

31-1/4
31-1/4
31-1/4

24-1/4
24-1/4
30-1/4

1100
1200
1600

1422
1422
1581

793
793
794

616
616
768

499
499
728

FR917
FR917
FR918A

286A
286A
286A

WS34
WS34
WS34

800. MD175E89
800. MD220E89
800. MD275E89

8,030.
9,300.
10,880.

300
400
500

330
440
550

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

75

44-1/2

36

2200

1905

1130

914

1000

FR919

321A

WS35





1,360. MD330E89
— MD440E89 
— MD550E89 

12,925.
18,900.
22,800.

600
700
800

660
770
880

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150














































































— MD660E89 
— MD770E89 
— MD880E89 

27,600.
34,400.
39,300.

FR909
FR909
FR909

286A
286A
286A

WS31
WS31
WS31

350. MD075E90
350. MD11E90
350. MD14E90

1,400.
1,450.
1,550.



















































MD075E89
MD11E89
MD14E89
MD20E89

1,400.
1,450.
1,550.
1,920.

230 ∆ Volts to 575Y/332 Volts
5
7.5
10

7.5 1@+5%
11
1@+5%
14
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

25
25
25

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
152
152

635
635
635

511
511
511

358
358
358

69
69
69

15
20
25

20
27
34

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
230
310

765
765
765

511
511
511

358
358
358

104
104
140

FR910A
FR910A
FR912A

286A
286A
286A

WS31
WS31
WS31

350. MD20E90
350. MD27E90
350. MD34E90

1,920.
2,195.
2,430.

30
40
50

40
51
63

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
480

765
1000
1000

511
663
663

358
485
485

140
217
217

FR912A
FR914B
FR914B

286A
286A
286A

WS31
WS33
WS33

350. MD40E90
350. MD51E90
350. MD63E90

2,800.
3,165.
3,580.

60
75
100

75
93
118

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

485
485
585

217
272
344

FR914B
FR915B
FR916A

286A
286A
286A

WS33
WS33
WS19

350. MD75E90
350. MD93E90
350. MD118E90

3,875.
4,650.
5,440.

125
150
200

145
175
220

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

46-1/8
56
56

28
31-1/4
31-1/4

23
24-1/4
24-1/4

760
1100
1200

1171
1422
1422

712
793
793

585
616
616

344
499
499

FR916A
FR917
FR917

286A
286A
286A

WS19
WS34
WS34

350. MD145E90
800. MD175E90
800. MD220E90

6,350.
8,030.
9,300.

250
300
400

275
330
440

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75

31-1/4
44-1/2

30-1/4
36

1600
2200

1581
1905

794
1130

768
914

728
1000

FR918A
FR919

286A









WS34
WS35



800. MD275E90
1,360. MD330E90
— MD440E90 

10,880.
12,925.
18,900.

500
600
700

550
660
770

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150














































































— MD550E90 
— MD660E90 
— MD770E90 

22,800.
27,600.
34,400.





























Refer to your Cutler-Hammer sales office.
Not Seismic Qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Drive Isolation Transformers

9-54

November 2003

Three-Phase

Vol. 1, Ref. No. [0354]

Table 9-59. Drive Isolation Transformers
Hp

kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches) Wt.
Temp. H
Lbs.
W
D
Rise

Dimensions (mm)
H

W

D

Wt.
kg

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

460 ∆ Volts to 230Y/133 Volts

9

5
7.5
10
15

7.5
11
14
20

1@+5%
1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
25
25
30-1/8

20-1/8
20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8
14-1/8

152
152
152
230

635
635
635
765

511
511
511
511

358
358
358
358

69
69
69
104

FR909
FR909
FR909
FR910A

286D
286D
286D
286D

WS31
WS31
WS31
WS31

350.
350.
350.
350.

20
25
30

27
34
40

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
310
310

765
765
765

511
511
511

358
358
358

104
140
140

FR910A
FR912A
FR912A

286D
286D
286D

WS31
WS31
WS31

350. MD27E91
350. MD34E91
350. MD40E91

2,195.
2,430.
2,800.

40
50
60

51
63
75

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
39-3/8

26-1/8
26-1/8
26-1/8

19-1/8
19-1/8
19-1/8

480
480
480

1000
1000
1000

663
663
663

485
485
485

217
217
217

FR914B
FR914B
FR914B

286D
286D
286D

WS33
WS33
WS33

350. MD51E91
350. MD63E91
350. MD75E91

3,165.
3,580.
3,875.

75
100
125

93
118
145

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
46-1/8

26-1/8
28
28

19-1/8
23
23

600
760
760

1000
1171
1171

663
712
712

485
585
585

272
344
344

FR915B
FR916A
FR916A

286D
286D
286D

WS33
WS19
WS19

350. MD93E91
350. MD118E91
350. MD145E91

4,650.
5,440.
6,350.

150
200
250

175
220
275

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

56
56
62-1/4

31-1/4
31-1/4
31-1/4

24-1/4
24-1/4
30-1/4

1100
1200
1600

1422
1422
1581

793
793
794

616
616
768

499
499
728

FR917
FR917
FR918A

286D
286D
286D

WS34
WS34
WS34

800. MD175E91
800. MD220E91
800. MD275E91

8,030.
9,300.
10,880.

300
400
500

330
440
550

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

75
75
75

44-1/2
44-1/2
44-1/2

36
36
36

2200
2200
2900

1905
1905
1905

1130
1130
1130

914
914
914

1000
1000
1315

FR919
FR919
FR920

318E
318E
318E

WS35
WS35
WS35

1,360. MD330E91
1,360. MD440E91
1,360. MD550E91

12,925.
18,900.
22,800.

600
700
800

660
770
880

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

75
75

44-1/2
44-1/2

36
36

2900
2900

1905
1905

1130
1130

914
914

1315
1315

FR920
FR920

318E
318E

WS35
WS35

1,360. MD660E91
1,360. MD770E91
— MD880E91 

27,600.
34,400.
39,300.

1000
1250
1500

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150














































































—
—
—


































MD075E91
MD11E91
MD14E91
MD20E91

— MD1000E91 
— MD1250E91 
— MD1500E91 

1,400.
1,450.
1,550.
1,920.

42,570.
49,500.
78,600.

460 ∆ Volts to 460Y/266 Volts
5
7.5
10
15

7.5
11
14
20

1@+5%
1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
25
25
30-1/8

20-1/8
20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8
14-1/8

152
152
152
230

635
635
635
765

511
511
511
511

358
358
358
358

69
69
69
104

FR909
FR909
FR909
FR910A

286D
286D
286D
286D

WS31
WS31
WS31
WS31

350.
350.
350.
350.

20
25
30

27
34
40

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
310
310

765
765
765

511
511
511

358
358
358

104
140
140

FR910A
FR912A
FR912A

286D
286D
286D

WS31
WS31
WS31

350. MD27E92
350. MD34E92
350. MD40E92

2,195.
2,430.
2,800.

40
50
60

51
63
75

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
39-3/8

26-1/8
26-1/8
26-1/8

19-1/8
19-1/8
19-1/8

480
480
480

1000
1000
1000

663
663
663

485
485
485

217
217
217

FR914B
FR914B
FR914B

286D
286D
286D

WS33
WS33
WS33

350. MD51E92
350. MD63E92
350. MD75E92

3,165.
3,580.
3,875.

75
100
125

93
118
145

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
46-1/8

26-1/8
28
28

19-1/8
23
23

600
760
760

1000
1171
1171

663
712
712

485
585
585

272
344
344

FR915B
FR916A
FR916A

286D
286D
286D

WS33
WS19
WS19

350. MD93E92
350. MD118E92
350. MD145E92

4,650.
5,440.
6,350.

150
200
250

175
220
275

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

56
56
62-1/4

31-1/4
31-1/4
31-1/4

24-1/4
24-1/4
30-1/4

1100
1200
1600

1422
1422
1581

793
793
794

616
616
768

499
499
728

FR917
FR917
FR918A

286D
286D
286D

WS34
WS34
WS34

800. MD175E92
800. MD220E92
800. MD275E92

8,030.
9,300.
10,880.

300
400
500

330
440
550

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

75
75
75

44-1/2
44-1/2
44-1/2

36
36
36

2200
2200
2900

1905
1905
1905

1130
1130
1130

914
914
914

1000
1000
1315

FR919
FR919
FR919

318E
318E
318E

WS35
WS35
WS35

1,360. MD330E92
1,360. MD440E92
1,360. MD550E92

12,925.
18,900.
22,800.

600
700
800

660
770
880

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150

75
75

44-1/2
44-1/2

36
36

2900
2900

1905
1905

1130
1130

914
914

1315
1315

FR920
FR920

318E
318E

WS35
WS35

1,360. MD660E92
1,360. MD770E92
— MD880E92 

27,600.
34,400.
39,300.

1000
1250
1500

1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3

150
150
150














































































—
—
—





































MD075E92
MD11E92
MD14E92
MD20E92

— MD1000E92 
— MD1250E92 
— MD1500E92 

1,400.
1,450.
1,550.
1,920.

42,570.
49,500.
78,600.

Refer to your Cutler-Hammer sales office.
Not Seismic Qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Drive Isolation Transformers

9-55

November 2003

Three-Phase

Vol. 1, Ref. No. [0355]

Table 9-60. Drive Isolation Transformers
Hp

kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches) Wt.
Temp. H
Lbs.
W
D
Rise

Dimensions (mm)
H

W

D

Wt.
kg

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

FR909
FR909
FR909

286D
286D
286D

WS31
WS31
WS31

350. MD075E93
350. MD11E93
350. MD14E93

1,400.
1,450.
1,550.

Price
U.S. $

460 ∆ Volts to 575Y/332 Volts
5
7.5
10

7.5 1@+5% 1@-5%
11
1@+5% 1@-5%
14
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

25
25
25

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
152
152

635
635
635

511
511
511

358
358
358

69
69
69

15
20
25

20
27
34

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
230
310

765
765
765

511
511
511

358
358
358

104
104
140

FR910A
FR910A
FR912A

286D
286D
286D

WS31
WS31
WS31

350. MD20E93
350. MD27E93
350. MD34E93

1,920.
2,195.
2,430.

30
40
50

40
51
63

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
480

765
1000
1000

511
663
663

358
485
485

140
217
217

FR912A
FR914B
FR914B

286D
286D
286D

WS31
WS33
WS33

350. MD40E93
350. MD51E93
350. MD63E93

2,800.
3,165.
3,580.

60
75
100

75
93
118

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
20-1/8

480
600
760

1000
1000
1171

663
663
712

485
485
585

217
272
344

FR914B
FR915B
FR916A

286D
286D
286D

WS33
WS33
WS19

350. MD75E93
350. MD93E93
350. MD118E93

3,875.
4,650.
5,440.

125
150
200

145
175
220

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

46-1/8
56
56

28
31-1/4
31-1/4

23
24-1/4
24-1/4

760
1100
1200

1171
1422
1422

712
793
793

585
616
616

344
499
499

FR916A
FR917
FR917

286D
286D
286D

WS19
WS34
WS34

350. MD145E93
800. MD175E93
800. MD220E93

6,350.
8,030.
9,300.

250
300
400

275
330
440

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2200
2200

1581
1905
1905

794
1130
1130

768
914
914

728
1000
1000

FR918A
FR919
FR919

286D
318E
318E

WS34
WS35
WS35

800. MD275E93
1,360. MD330E93
1,360. MD440E93

10,880.
12,925.
18,900.

500
600
700

550
660
770

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

75
75
75

44-1/2
44-1/2
44-1/2

36
36
36

2900
2900
2900

1905
1905
1905

1130
1130
1130

914
914
914

1315
1315
1315

FR920
FR920
FR920

318E
318E
318E

WS35
WS35
WS35

1,360. MD550E93
1,360. MD660E93
1,360. MD770E93

22,800.
27,600.
34,400.

575 ∆ Volts to 230Y/133 Volts
5
7.5
10
15

7.5
11
14
20

1@+5%
1@+5%
1@+5%
1@+5%

1@-5%
1@-5%
1@-5%
1@-5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
25
25
30-1/8

20-1/8
20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8
14-1/8

152
152
152
230

635
635
635
765

511
511
511
511

358
358
358
358

69
69
69
104

FR909
FR909
FR909
FR910A

286H
286H
286H
286H

WS31
WS31
WS31
WS31

350.
350.
350.
350.

20
25
30

27
34
40

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
310
310

765
765
765

511
511
511

358
358
358

104
140
140

FR910A
FR912A
FR912A

286H
286H
286H

WS31
WS31
WS31

350. MD27E94
350. MD34E94
350. MD40E94

2,195.
2,430.
2,800.

40
50
60

51
63
75

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
39-3/8

26-1/8
26-1/8
26-1/8

19-1/8
19-1/8
19-1/8

480
480
480

1000
1000
1000

663
663
663

485
485
485

217
217
217

FR914B
FR914B
FR914B

286H
286H
286H

WS33
WS33
WS33

350. MD51E94
350. MD63E94
350. MD75E94

3,165.
3,580.
3,875.

75
100
125

93
118
145

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
46-1/8
46-1/8

26-1/8
28
28

19-1/8
23
23

600
760
760

1000
1171
1171

663
712
712

485
585
585

272
344
344

FR915B
FR916A
FR916A

286H
286H
286H

WS33
WS19
WS19

350. MD93E94
350. MD118E94
350. MD145E94

4,650.
5,440.
6,350.

150
200
250

175
220
275

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

56
56
62-1/4

31-1/4
31-1/4
31-1/4

24-1/4
24-1/4
30-1/4

1100
1200
1600

1422
1422
1581

793
793
794

616
616
768

499
499
728

FR917
FR917
FR918A

286H
286H
286H

WS19
WS34
WS34

350. MD175E94
800. MD220E94
800. MD275E94

8,030.
9,300.
10,880.

300
400
500

330
440
550

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

75
75
75

44-1/2
44-1/2
44-1/2

36
36
36

2200
2200
2900

1905
1905
1905

1130
1130
1130

914
914
914

1000
1000
1315

FR919
FR919
FR920








WS35
WS35
WS35

1,360. MD330E94
1,360. MD440E94
1,360. MD550E94

12,925.
18,900.
22,800.

600
700
800

660
770
880

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150

75
75




44-1/2
44-1/2

36
36

2900
2900

1905
1905

1130
1130

914
914

1315
1315

FR920
FR920










WS35
WS35

1,360. MD660E94
1,360. MD770E94
— MD880E94 

27,600.
34,400.
39,300.

1000
1250
1500

1@+5% 1@-5%
1@+5% 1@-5%
1@+5% 1@-5%

DT-3
DT-3
DT-3

150
150
150














































































—
—
—




























MD075E94
MD11E94
MD14E94
MD20E94

— MD1000E94 
— MD1250E94 
— MD1500E94 

1,400.
1,450.
1,550.
1,920.

42,570.
49,500.
78,600.

Refer to your Cutler-Hammer sales office.
Not Seismic Qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Drive Isolation Transformers

9-56

November 2003

Three-Phase

Vol. 1, Ref. No. [0356]

Table 9-61. Drive Isolation Transformers
Hp

kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt.
Lbs.

Dimensions (mm) Wt.
kg
H
W
D

Frame

Wiring
Weathershield Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

575 ∆ Volts to 460Y/266 Volts

9

5
7.5
10
15

7.5
11
14
20

1@+5%
1@+5%
1@+5%
1@+5%

DT-3
DT-3
DT-3
DT-3

150
150
150
150

25
25
25
30-1/8

20-1/8
20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8
14-1/8

152
152
152
230

635
635
635
765

511
511
511
511

358
358
358
358

69
69
69
104

FR909
FR909
FR909
FR910A

286H
286H
286H
286H

WS31
WS31
WS31
WS31

350.
350.
350.
350.

20
25
30

27
34
40

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
310
310

765
765
765

511
511
511

358
358
358

104
140
140

FR910A
FR912A
FR912A

286H
286H
286H

WS31
WS31
WS31

350. MD27E95
350. MD34E95
350. MD40E95

2,195.
2,430.
2,800.

40
50
60

51
63
75

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

39-3/8
39-3/8
39-3/8

26-1/8
26-1/8
26-1/8

19-1/8
19-1/8
19-1/8

480
480
480

1000
1000
1000

663
663
663

485
485
485

217
217
217

FR914B
FR914B
FR914B

286H
286H
286H

WS33
WS33
WS33

350. MD51E95
350. MD63E95
350. MD75E95

3,165.
3,580.
3,875.

75
100
125

93
118
145

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

39-3/8
46-1/8
46-1/8

26-1/8
28
28

19-1/8
23
23

600
760
760

1000
1171
1171

663
712
712

485
585
585

272
344
344

FR915B
FR916A
FR916A

286H
286H
286H

WS33
WS19
WS19

350. MD93E95
350. MD118E95
350. MD145E95

4,650.
5,440.
6,350.

150
200
250

175
220
275

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

56
56
62-1/4

31-1/4
31-1/4
31-1/4

24-1/4
24-1/4
30-1/4

1100
1200
1600

1422
1422
1581

793
793
794

616
616
768

499
499
728

FR917
FR917
FR918A

286H
286H
286H

WS34
WS34
WS34

800. MD175E95
800. MD220E95
800. MD275E95

8,030.
9,300.
10,880.

300
400
500

330
440
550

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

75
75
75

44
44
44

36
36
36

2200
2200
2900

1905
1905
1905

1130
1130
1130

914
914
914

1000
1000
1315

FR919
FR919
FR920

318F
318F
318F

WS35
WS35
WS35

1,360. MD330E95
1,360. MD440E95
1,360. MD550E95

12,925.
18,900.
22,800.

600
700
800

660
770
880

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150




75
75

44-1/2
44-1/2

36
36

2900
2900

1905
1905

1130
1130

914
914

1315
1315

FR920
FR920

318F
318F

WS35
WS35

1,360. MD660E95
1,360. MD770E95
— MD880E95 

27,600.
34,400.
39,300.

1000
1250
1500

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150














































































FR909
FR909
FR909

286H
286H
286H

WS31
WS31
WS31

350. MD075E96
350. MD11E96
350. MD14E96

1,400.
1,450.
1,550.

—
—
—

1@-5%
1@-5%
1@-5%
1@-5%































MD075E95
MD11E95
MD14E95
MD20E95

— MD1000E95 
— MD1250E95 
— MD1500E95 

1,400.
1,450.
1,550.
1,920.

42,570.
49,500.
78,600.

575 ∆ Volts to 575Y/332 Volts
5
7.5
10

7.5 1@+5% 1@-5% DT-3
11
1@+5% 1@-5% DT-3
14
1@+5% 1@-5% DT-3

150
150
150

25
25
25

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

152
152
152

635
635
635

511
511
511

358
358
358

69
69
69

15
20
25

20
27
34

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
230
310

765
765
765

511
511
511

358
358
358

104
104
140

FR910A
FR910A
FR912A

286H
286H
286H

WS31
WS31
WS31

350. MD20E96
350. MD27E96
350. MD34E96

1,920.
2,195.
2,430.

30
40
50

40
51
63

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

30-1/8
39-3/8
39-3/8

20-1/8
26-1/8
26-1/8

14-1/8
19-1/8
19-1/8

310
480
480

765
1000
1000

511
663
663

358
485
485

140
217
217

FR912A
FR914B
FR914B

286H
286H
286H

WS31
WS33
WS33

350. MD40E96
350. MD51E96
350. MD63E96

2,800.
3,165.
3,580.

60
75
100

75
93
118

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

1000
1000
1171

663
663
712

485
485
585

217
272
344

FR914B
FR915B
FR916A

286H
286H
286H

WS33
WS33
WS19

350. MD75E96
350. MD93E96
350. MD118E96

3,875.
4,650.
5,440.

125
150
200

145
175
220

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

46-1/8
56
56

28
31-1/4
31-1/4

23
24-1/4
24-1/4

760
1100
1200

1171
1422
1422

712
793
793

585
616
616

344
499
499

FR916A
FR917
FR917

286H
286H
286H

WS19
WS34
WS34

350. MD145E96
800. MD175E96
800. MD220E96

6,350.
8,030.
9,300.

250
300
400

275
330
440

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

62-1/4
75
75

31-1/4
44-1/2
44-1/2

30-1/4
36
36

1600
2200
2200

1581
1905
1905

794
1130
1130

768
914
914

728
1000
1000

FR918A
FR919
FR919






286H

WS34
WS35
WS35

800. MD275E96
1,360. MD330E96 
1,360. MD440E96 

10,880.
12,925.
18,900.

500
600
700

550
660
770

1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3
1@+5% 1@-5% DT-3

150
150
150

75
75

44-1/4
44-1/4

36
36

2900
2900

1905
1905

1130
1130

914
914

1315
1315

FR920
FR920








WS35
WS35

1,360. MD550E96 
1,360. MD660E96 
— MD770E96 

22,800.
27,600.
34,400.



































Refer to your Cutler-Hammer sales office.
Not Seismic Qualified.

Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Mini-Power Centers

9-57

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0357]

Mini-Power Centers

■
■
■
■

■
■

■
■

Three-Phase Mini-Power Center

Product Description
■

Sand and Resin Encapsulated design.
■ Suitable for indoor or outdoor
applications.
■ 185°C Insulation system, 115°C
Rise standard.

Application Description
A Mini-Power Center combines three
individual components into one NEMA
Type 3R enclosure: a main breaker, an
encapsulated single-phase (Type EP)
or three-phase (EPT) Dry-Type Transformer, and a secondary distribution
loadcenter with main breaker. Interconnecting wiring is completed at the
factory. Mini-Power Centers are used
wherever there is a 480 volt or 600 volt
distribution system and loads requiring
208Y/120 volt, 3-phase or 120/240 volt
single-phase. Typical installations
include:
■
■
■
■
■
■
■
■
■

Industrial plant assembly lines.
Plant expansions.
Test equipment.
Temporary construction site power.
Sewage disposal plants.
Warehouses.
Car washes.
Parking lots.
Commercial buildings.

Features, Benefits
and Functions
■

UL listed, CSA
 certified.
60 Hz operation.
■ Indoor-Outdoor, NEMA 3R.
■ Primary main breaker.
■ Secondary main breaker (Type BR
feeder breakers not included).
■

■
■

All live parts enclosed for personnel
safety.
Cover is hinged to prevent removal
and can be padlocked.
Cores are grounded with a copper lead.
Ground bar is supplied to permit
grounding of individual secondary
circuits.
Neutral bar is grounded to case.
Feeder circuits can be easily added
or changed using Type BR plug-in
breakers.
Suitable for service entrance.
Aluminum windings and loadcenter
chassis standard.
Short-term overload capability as
required by ANSI.
Meet NEMA ST-20 sound levels.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Options and Accessories
Please refer to Page 9-120.

being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-62. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as
the higher temperature systems.

Sound Levels
All Cutler-Hammer 600 volt class general
purpose dry-type distribution transformers are designed to meet NEMA ST-20
sound levels listed here. These are the
sound levels measured in a soundproof
environment. Actual sound levels measured at an installation will likely be higher
due to electrical connections and environmental conditions. Lower sound levels are
available and should be specified when
the transformer is going to be installed in
an area where sound may be a concern.

Winding Terminations

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies must be
specifically designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without

The Cutler-Hammer business recommends external cables be rated 90°C
(sized at 75°C ampacity) for encapsulated designs and 75°C for ventilated
designs.

Technical Data
and Specifications
Please refer to Page 9-122.

The following pages provide listings for most
standard transformer ratings and styles.
For all-copper and bolt-on-breaker designs,
contact Eaton’s Cutler-Hammer business.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to the Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
Mini-Power Centers

9-58

November 2003

Single-Phase and Three-Phase

Vol. 1, Ref. No. [0358]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-63. Single-Phase — Mini-Power Centers
kVA Full
Cap.
Taps
FCBN

Dimensions (Inches)
H

W

Wt. Dimensions
Lbs. (mm)

D

H

W

Wt. Frame
kg
D

Wiring
Diagram
Number

Main Circuit Breaker

97A3K
110A5K
109A7K

EHD2015 BR215
EHD2020 BR225
EHD2030 BR230

Primary

Feeder
Max. Style
Breakers
Amp Number
Secondary Max. Number
1-Pole 2-Pole

Price
U.S. $

480 Volts to 120/240 Volts
3
2@-5% 27-1/2 12-9/16
5
2@-5% 29-1/2 12-9/16
7.5 2@-5% 29-1/2 12-9/16
10
15
25

2@-5% 38-1/8 13-1/2
2@-5% 38-1/8 13-1/2
2@-5% 43-7/8 16-3/8

9-3/4 105
9-3/4 110
9-3/4 125
11-7/8 180
11-7/8 215
14-5/8 373

698 319 248
749 319 248
749 319 248

47 FR283
50 FR284
56 FR284

968 342 301 82 FR285
968 342 301 98 FR286
1115 417 372 169 FR287

8
12
12

4
6
6

12
20
30

P48G11S03P
P48G11S05P
P48G11S07P

2,100.
2,940.
3,540.

108A10K EHD2040 BR250
107A15K EHD2060 BR270
106A25K EHD2100 BR2125

12
20
26

6
10
13

40
60
100

P48G11S10P
P48G11S15P
P48G11S25P

3,720.
5,000.
7,240.

110B5K
FDB2015 BR225
109B7K
FDB2030 BR230
108B10K FDB2040 BR250

12
12
12

6
6
6

20
30
40

P60G11S05P
P60G11S07P
P60G11S10P

3,785.
4,040.
4,240.

107B15K FDB2060 BR270
106B25K FDB2100 BR2125

20
26

10
13

60
100

P60G11S15P
P60G11S25P

5,640.
8,310.

600 Volts to 120/240 Volts

9

5
2@-5% 29-1/2 12-9/16 9-3/4 110
7.5 2@-5% 29-1/2 12-9/16 9-3/4 125
10
2@-5% 38-1/8 13-1/2 11-7/8 180
15
25

2@-5% 38-1/8 13-1/2
2@-5% 43-7/8 16-3/8

11-7/8 215
14-5/8 373

749 319 248
749 319 248
968 342 301

50 FR284
56 FR284
82 FR285

968 342 301 98 FR286
1115 417 372 169 FR287

Table 9-64. Three-Phase — Mini-Power Centers
kVA Full
Cap.
Taps
FCBN

Dimensions (Inches)
H

W

Wt. Dimensions
Lbs. (mm)
W

D

Wt. Frame
kg

Max. Style
Wiring
Main Circuit Breaker Feeder
Breakers 
Amp Number
Diagram 

Number Primary Secondary Max. Number
1-Pole 2-Pole

Price
U.S. $

D

H

9-3/8 320
13-5/8 565
13-5/8 635

917 730 238 145 FR289A 105A15K EHD3040 BR350
1038 759 346 256 FR290A 103A21K EHD3070 BR370
1063 759 346 288 FR291A 104A30K EHD3090 BR3100

18
18
24

6
6
8

40
60
80

P48G28T15P 7,420.
P48G28T21P 9,225.
P48G28T30P 11,750.

9-3/8 320
13-5/8 565
13-5/8 635

917 730 238 145 FR289A 105D15K FDB3030 BR350
1038 759 346 256 FR290A 103B21K FDB3050 BR370
1063 759 346 288 FR291A 104B30K FDB3070 BR3100

18
18
24

6
6
8

40
60
80

P60G28T15P 8,685.
P60G28T21P 10,860.
P60G28T30P 15,150.

480 ∆ Volts to 208Y/120 Volts
15
2@-5% 36-1/8 28-3/4
22.5 2@-5% 40-7/8 29-7/8
30
2@-5% 41-7/8 29-7/8

600 ∆ Volts to 208Y/120 Volts
15
2@-5% 36-1/8 28-3/4
22.5 2@-5% 40-7/8 29-7/8
30
2@-5% 41-7/8 29-7/8





Primary breakers with higher interrupting capacity available. For HFD breaker, add suffix “H.” For FD breaker, add suffix “F.” For FDC breaker,
add suffix “C.” Main breakers are fixed only.
Combinations can be selected.
Feeder breakers not included, use Eaton’s Cutler-Hammer Type BR.

Note: For 316 grade stainless steel enclosure replace 10th character of catalog number with an “SS” suffix, i.e., P48G11S03SS.
Note: For all-copper, bolt-on breaker designs, contact the Cutler-Hammer business.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Totally Enclosed Non-Ventilated Transformers

9-59

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0359]

Single- and Three-Phase,
Types DS-3E, DT-3E, 60 Hz

Features, Benefits
and Functions
■

60 Hz operation
(50/60 Hz operation available).
■ Short-term overload capability
as required by ANSI.
■ Meet NEMA ST-20 sound levels.

Standards and Certifications
Industry Standards

Three-Phase Type DT-3E
Totally Enclosed Non-Ventilated

Product Description
■

Suitable for indoor or outdoor
applications.
■ Totally enclosed, non-ventilated
enclosures.
■ 220°C insulation system,
150°C rise standard.

Application Description
Totally enclosed non-ventilated drytype transformers are for special applications, where because of adverse
atmospheric conditions it is desirable
to use a dry-type non-ventilated transformer vs. the ventilated standard unit,
which has openings in its enclosure
to allow air to flow directly over the
core and coil.
In applications where the atmosphere
contains conductive, corrosive, or
combustible materials, which might
damage a transformer, or lint and dust
flyings which might block the ventilation passages, the non-ventilated
transformer is highly suited. It has
no openings in the enclosure. Heat
is dissipated by radiating from the
surface area of the enclosure. Consequently, the enclosures are larger
than those of the standard ventilated
type. Non-ventilated transformers are
suited for application in the textile,
chemical, automotive, petrochemical,
foundry, cement, food, paper, and
other industries where the transformer
is subject to spray or washdown
conditions.

All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-65. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer totally enclosed, nonventilated transformers, Types DS-3E
and DT-3E, utilize a NEMA 3R rated
enclosure as standard.

Winding Terminations
Primary and secondary windings are
terminated in the wiring compartment.
Totally enclosed non-ventilated transformers have leads brought out to
aluminum pads that are pre-drilled
to accept Cu/Al lugs. Lugs are not
supplied with these transformers.
The Cutler-Hammer business recommends external cables be rated 75°C
for ventilated designs.

Series-Multiple Windings
Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available
in addition to the series or parallel
connection. As an example, a 120 X 240
winding can be connected for either
120 (parallel) or 240 (series), but a
120/240 winding can be connected
for 120 (parallel), or 240 (series), or
240 with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com





	

9

Transformers
Totally Enclosed Non-Ventilated Transformers

9-60

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0360]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-66. Single-Phase Selection Information — Type DS-3E, 60 Hz 

kVA

Type

°C
Temp.
Rise

Dimensions (Inches)
H

W

Weight
Lbs.

D

Dimensions (mm)
H

W

D

Weight
kg

Frame

Wiring
Diagram
Number

Style
Number

FR820N
FR820N

3XA
3XA

T20P11S37NV
T20P11S50NV

Frame

Wiring
Diagram
Number

Style
Number

Price
U.S. $

240 x 480 Volts to 120/240 Volts +1 – 5%, -2 – 5% at 240 Volts Primary; +2 – 2.5%, -4 – 2.5% at 480 Volts primary.
37.5
50

DS-3E
DS-3E

150
150

42-1/8
42-1/8

24
24

23-3/8
23-3/8

600
720

1070
1070

610
610

594
594

274
329

4,330.
5,400.

Table 9-67. Three-Phase Selection Information — Type DT-3E, 60 Hz 

kVA

Type

°C
Temp.
Rise

Dimensions (Inches)
H

W

Weight
Lbs.

D

Dimensions (mm)
H

W

D

Weight
kg

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts +2 – 2.5% FCAN, 4 – 2.5% FCBN Taps
30
45
75

DT-3E
DT-3E
DT-3E

150
150
150

39-1/4
39-1/4
46-1/2

26-1/8
26-1/8
28

19-1/8
19-1/8
23

480
600
760

995
995
1171

663
663
712

486
486
585

217
272
344

112.5
150
225
300

DT-3E
DT-3E
DT-3E
DT-3E

150
150
150
150

56
56
75
75

31-1/4
31-1/4
44-1/2
44-1/2

24-1/2
24-1/2
36
36

1100
1300
2400
2900

1422
1422
1905
1905

793
793
1130
1130

622
622
914
914

499
589
1088
1315

9




FR914AN 280B
FR915AN 280B
FR916AN 280B

V48M28T30NV
V48M28T45NV
V48M28T75NV

3,080.
4,400.
5,500.

FR917N
FR918AN
FR919N
FR920N

V48M28T12NV
V48M28T49NV
V48M28T22NV
V48M28T33NV

8,000.
10,100.
16,000.
26,000.

280B
280B
275A
275A

Types DS-3 and DT-3 non-ventilated transformers are not UL listed.
Transformers Type EPT 75 kVA and smaller three-phase, and Type EP 25 kVA and smaller single-phase, are furnished non-ventilated normally,
as standard (and are UL listed). See General Purpose Transformers.

Note: Contact your local Cutler-Hammer sales office for availability of additional Totally Enclosed Non-Ventilated Transformers.
Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.





	

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Class I, Division 2, Groups C and D Transformers

9-61

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0361]

Single- and Three-Phase,
Types EPZ, EPTZ, 60 Hz

8. Or, a location that is adjacent to
a Class I, Division 1 location and
ignitable concentrations of gases or
vapors might occasionally enter.
Atmospheres classified by NEC Section
500 as Group C may contain gases or
vapors such as ethyl ether, ethylene, or
the equivalent. Atmospheres classified
as Group D may contain gases or
vapors such as acetone, ammonia,
benzene, butane, cyclopropane, ethanol,
gasoline, hexane, methanol, methane,
natural gas, naphtha, propane, or the
equivalent.

Single-Phase Type EPZ Encapsulated

Product Description
■
■
■
■
■
■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
185°C Insulation system, 115°C
Rise standard.
Mountable in any position indoors.
Upright only outdoors.
Available in ratings up to 600 volts
primary, 37.5 kVA single-phase,
75 kVA three-phase.

Application Description
Type EPZ and EPTZ transformers are
labeled as “Suitable for use in Class I,
Division 2, Groups C and D locations,
as defined by NEC Article 501, with
NEC-recommended installation procedures for dry-type transformers rated
under 600 volts nominal operation.”
A Class I, Division 2 location per
Section 500 of the NEC is defined as:
6. A location in which volatile
flammable liquids or gases are
handled, processed or used, but
which normally will be confined
within closed containers or systems from which they can escape
only in case of accidental rupture
or breakdown of the container
or system.
7. Or, a location where ignitable
concentrations of gases or vapors
are normally prevented by positive
mechanical ventilation and which
might become hazardous through
failure of the ventilation equipment.

CA08101001E

Features, Benefits
and Functions
■
■
■
■
■
■

NEMA 3R enclosure.
60 Hz operation.
Aluminum windings (copper
optional).
Short-term overload capability as
required by ANSI.
Meet NEMA ST-20 sound levels.
Long leads to ease wiring to
junction box.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

For more information visit: www.cutler-hammer.eaton.com

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-68. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer encapsulated
transformers, Types EPZ and EPTZ,
utilize a NEMA 3R rated enclosure.

Sound Levels
All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to be
installed in an area where sound may
be a concern.








9

Transformers
Class I, Division 2, Groups C and D Transformers

9-62

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0362]

Winding Terminations

Series-Multiple Windings

Lugs are not supplied with these transformers. Eaton’s Cutler-Hammer business recommends external cables be
rated 90°C (sized at 75°C ampacity) for
encapsulated designs and 75°C for ventilated designs.

Series-multiple windings consist of 2
similar coils in each winding which can
be connected in series or parallel (multiple). Transformers with series-multiple
windings are designated with an “X” or
“/” between the voltage ratings, such as
voltages of “120/240” or “240 X 480.”
If the series-multiple winding is designated by an “X,” the winding can be
connected only for a series or parallel.
With the “/” designation, a mid-point
also becomes available in addition to
the series or parallel connection. As an

Nominal and tap leads come out of
the transformer through pipe elbows.
Connections should be made to an
adjacent explosion-proof junction box.
Unused tap leads must be properly
insulated prior to energization. EPZ
and EPTZ transformers are not UL listed.

example, a 120 X 240 winding can be
connected for either 120 (parallel) or
240 (series), but a 120/240 winding can
be connected for 120 (parallel), or 240
(series), or 240 with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.

Product Selection

9

Additional Product Selection information begins on Page 9-136.
Table 9-69. Single-Phase Selection Information — Type EPZ, 60 Hz
kVA

Full Cap. Taps
FCAN

Type

°C
Dimensions (Inches) 

Temp. H
W
D
Rise

FCBN

Wt.
Lbs.

Dimensions (mm) 
 Wt.
kg
H
W
D

Frame

Wiring
Style
Diagram Number
Number

Price
U.S. $

480 Volts to 120/240 Volts
.05
.75
1

—
—
—

—
—
—

EPZ
EPZ
EPZ

115
115
115

6-1/2
8-3/8
8-3/8

4-7/8
6
6

4-5/8
5-3/4
5-3/4

13
21
31

165
213
213

124
152
152

118
146
146

6
10
14

FR57H
524H
FR58AH 524H
FR59AH 524H

Z48N11S51A
Z48N11S76A
Z48N11S01A

510.
675.
805.

1.5
2
3

—
—
—

—
—
—

EPZ
EPZ
EPZ

115
115
115

10-3/4
10-3/4
14-1/8

6-3/16
6-3/16
7-3/4

6-1/8
6-1/8
8

40
40
65

273
273
359

157
157
197

156
156
203

18
18
30

FR67H
FR68H
FR176H

524H
524H
524H

Z48N11S16A
Z48N11S02A
Z48N11S03A

975.
1,185.
1,370.

5
7.5
10

—
—
—

—
—
—

EPZ
EPZ
EPZ

115
115
115

16
16
19

10-3/8
10-3/8
13-3/8

9-7/8
9-7/8
10-1/2

113
123
193

406
406
483

264
264
340

232
232
267

51
56
88

FR177H
FR178H
FR179H

524H
524H
524H

Z48N11S05A
Z48N11S07A
Z48N11S10A

1,985.
2,375.
2,870.

15
25

—
—

—
—

EPZ
EPZ

115
115

19
22-3/8

13-3/8
16-3/8

10-1/2
14-1/2

216
375

483
567

340
416

267
359

98
170

FR180H
FR182H

524H
524H

Z48N11S15A
Z48N11S25A

3,530.
5,190.




Dimensions do not include the conduit for cable entry and exit.

Note: For 316 grade stainless steel enclosure replace 10th character of catalog number with an “SS” suffix.

Table 9-70. Three-Phase Selection Information — Type EPTZ, 60 Hz
kVA

Full Cap. Taps
FCAN

Type

FCBN

°C
Dimensions (Inches) 
Temp. H
W
D
Rise

Dimensions (mm)  Wt.
kg
H
W
D

Frame

116
143
166
275

340
403
403
442

405
419
419
500

211
251
251
265

53
65
75
125

FR201H
FR200H
FR103H
FR95H

70A
70A
70A
70A

Z48G28T03A
Z48G28T06A
Z48G28T09A
Z48G28T15A

2,645.
3,085.
3,825.
5,470.

12-3/4
14-5/8
15-5/8

422
660
1275

676
673
781

638
724
765

324
372
397

191
299
580

FR243H
FR244H
FR245H

66A
66A
66A

Z48G28T30A
Z48G28T45A
Z48G28T75A

9,720.
11,130.
14,490.

Wt.
Lbs.

Wiring
Style
Diagram Number
Number

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts Three-Phase
3
6
9
15

—
—
—
—

2@-5%
2@-5%
2@-5%
2@-5%

EPTZ
EPTZ
EPTZ
EPTZ

115
115
115
115

13-3/8
15-7/8
15-7/8
17-3/8

16
8-3/8
16-1/2
9-7/8
16-1/2
9-7/8
19-11/16 10-7/16

30
45
75

—
—
—

2@-5%
2@-5%
2@-5%

EPTZ
EPTZ
EPTZ

115
115
115

26-5/8
26-1/2
30-3/4

25-1/4
28-1/2
30-1/8

480 ∆ Volts to 240 ∆ Volts with 120 Volt Lighting Tap on B Phase 
6
9
15

—
—
—

2@-5%
2@-5%
2@-5%

EPTZ
EPTZ
EPTZ

115
115
115

13-1/8
19-9/16
14-15/16 21-7/8
21-3/4
22-5/16

6-1/4
7-3/8
11-3/8

115
160
340

333
379
552

497
556
567

158
187
289

52
73
155

FR102H
FR97H
FR195H

95A
95A
95A

Z48G22T06A
Z48G22T09A
Z48G22T15A

3,395.
4,205.
6,010.

30
45

—
—

2@-5%
2@-5%

EPTZ
EPTZ

115
115

26-5/8
26-1/2

12-3/4
14-5/8

422
660

676
673

638
724

324
372

191
299

FR243H
FR244H

95A
95A

Z48G22T30A
Z48G22T45A

10,690.
12,230.




25-1/4
28-1/2

Dimensions do not include the conduit for cable entry and exit.
Center Tap capacity limited to 5% of rated kVA.

Note: For 316 grade stainless steel enclosure replace 10th character of catalog number with an “SS” suffix.
Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.








For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Open Type Core and Coil Assembly Transformers

9-63

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0363]

Single- and Three-Phase,
Types DS-3C, DT-3C, 60 Hz
Product Description
■

220°C insulation system, 150°C
Rise standard.
■ Aluminum windings
(copper optional).

Application Description
The basic purpose of a transformer
is voltage transformation as near as
practically possible to the load for
economy and distribution of power.
Typical loads for dry-type distribution
transformers include lighting, heating,
air conditioners, fans, and machine
tools. Such loads are found in
commercial, institutional, industrial,
and residential structures.
Open core and coil assemblies are
typically used by panel builders and
equipment OEM customers who
incorporate the entire transformer
into their structures. A versatile option
to purchasing a standard, enclosed
transformer and discarding the
unneeded enclosure parts.

Features, Benefits
and Functions
■


 (UL recognized).

■

60 Hz operation standard,
50/60 Hz operation available.
■ Short-term overload capability as
required by ANSI.
■ Meet NEMA ST-20 sound levels.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards.

Seismically Qualified
All Cutler-Hammer manufactured drytype distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Options and Accessories
Please refer to Page 9-120.

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Sound Levels
All Cutler-Hammer 600 volt class general
purpose dry-type distribution transformers are designed to meet NEMA ST-20
sound levels listed here. These are the
sound levels measured in a soundproof
environment. Actual sound levels measured at an installation will likely be higher
due to electrical connections and environmental conditions. Lower sound levels are
available and should be specified when
the transformer is going to be installed in
an area where sound may be a concern.
Table 9-72. Average Sound Levels

Product Specifications

NEMA ST-20 Average Sound Level (dB)
kVA

Frequency
Cutler-Hammer standard dry-type distribution transformers are designed for 60
Hz operation. Transformers required for
other frequencies are available and
must be specifically designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-71. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The following pages provide listings for most
standard transformer ratings and styles.

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Winding Terminations
Lugs are not supplied with these
transformers. The Cutler-Hammer
business recommends external cables
be rated 90°C (sized at 75°C ampacity)
for encapsulated designs and 75°C
for ventilated designs.

Series-Multiple Windings
Series-multiple windings consist of 2
similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or 240
with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
Open Type Core and Coil Assembly Transformers

9-64

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0364]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-73. Single-Phase Selection Information — Type DS-3C, 60 Hz
kVA

Full Cap. Taps
FCAN

Type

FCBN

°C
Dimensions (Inches)
Temp. H
W
D
Rise

Wt.
Lbs.

150
150
150
150

147
212
306
340

Dimensions (mm)
D

Wt.
kg

Frame

W

428
574
574
574

402
445
495
495

67
96
139
154

FR815C
FR816C
FR817C
FR818C

Wt. Dimensions (mm)
Lbs. H
W
D

Wt.
kg

Frame

Wiring
Style
Diagram Number
Number

14
14
14

128
195
250

516
605
629

511
511
511

356
356
356

58
89
114

FR909C
FR910C
FR912C

280B
280B
280B

V48M28T15ZZ
V48M28T30ZZ
V48M28T45ZZ

1,350.
1,725.
2,100.

25-5/16 19
25-5/16 19
25-5/16 20

395
530
656

746
797
1052

643
643
643

483
483
508

180
241
298

FR914C
FR915C
FR916C

280B
280B
280B

V48M28T75ZZ
V48M28T12ZZ
V48M28T49ZZ

2,970.
4,300.
5,400.

H

Wiring
Style
Diagram Number
Number

Price
U.S. $

240 x 480 Volts to 120/240 Volts
15
25
37.5
50





















DS-3C
DS-3C
DS-3C
DS-3C

30-1/4
31-1/4
37-5/8
37-5/8

16-7/8
22-5/8
22-5/8
22-5/8

15-7/8
17-1/2
19-1/2
19-1/2

768
793
953
953

3XA
3XA
3XA
3XA

T20P11S15ZZ
T20P11S25ZZ
T20P11S37ZZ
T20P11S50ZZ

1,440.
1,870.
2,290.
2,780.

1@+5%, 2@–5% at 240 volts primary; 2@+2.5%, 4@–2.5% at 480 volts primary.

Table 9-74. Three-Phase Selection Information — Type DT-3C, 60 Hz
kVA

Full Cap. Taps
FCAN

9

FCBN

Type

°C
Dimensions (Inches)
Temp. H
W
D
Rise

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts
15
30
45

2@+2.5% 4@-2.5% DT-3C 150
2@+2.5% 4@-2.5% DT-3C 150
2@+2.5% 4@-2.5% DT-3C 150

20-5/16 20-1/8
23-13/16 20-1/8
24-3/4
20-1/8

75
112.5
150

2@+2.5% 4@-2.5% DT-3C 150
2@+2.5% 4@-2.5% DT-3C 150
2@+2.5% 4@-2.5% DT-3C 150

29-3/8
31-3/8
41-7/16

Note: Contact your local Cutler-Hammer sale offices for availability of additional Open Type Core and Coil Assemblies.
Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Filtered Noise Isolation Transformers

9-65

November 2003

Three-Phase

Vol. 1, Ref. No. [0365]

Three-Phase, 60 Hz
Product Description
■
■
■
■
■
■

■
■

Ventilated enclosures.
Indoor applications standard.
220°C insulation system,
150°C rise standard.
Aluminum windings
(copper available as option).
Electrostatic shield.
Surge suppression providing
protection from voltage surges
and spikes.
120 dB common mode noise
attenuation.
60 dB transverse mode noise
attenuation.

Application Description
The basic purpose of a transformer
is voltage transformation as near as
practically possible to the load for
economy and distribution of power.
Typical loads for dry-type distribution
transformers include lighting, heating,
air conditioners, fans, and machine
tools. Such loads are found in
commercial, institutional, industrial,
and residential structures.

Features, Benefits
and Functions

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-75. Insulation System Classification

■

UL listed.
60 Hz operation standard,
50/60 Hz operation available.
■ Short-term overload capability
as required by ANSI.
■ Meet NEMA ST-20 sound levels.
■

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

40°C
40°C
40°C
40°C

All Cutler-Hammer 600 volt class general
purpose dry-type distribution transformers are designed to meet NEMA ST-20
sound levels listed here. These are the
sound levels measured in a soundproof
environment. Actual sound levels measured at an installation will likely be higher
due to electrical connections and environmental conditions. Lower sound levels are
available and should be specified when
the transformer is going to be installed in
an area where sound may be a concern.
Table 9-76. Average Sound Levels

Overload Capability

Ambient

Sound Levels

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer ventilated transformers,
Types DS-3, DT-3, MD, and KT, utilize a
NEMA 2 rated (drip-proof) enclosure
as standard, and are rated NEMA 3R
with the addition of weathershields.

kVA

NEMA Average 

Sound Level in dB

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65




9

Applies to general purpose ventilated
transformers only.

Winding Terminations
Primary and secondary windings are terminated in the wiring compartment. Ventilated transformers have leads brought
out to aluminum pads that are pre-drilled
to accept Cu/Al lugs. Lugs are not supplied with these transformers. The
Cutler-Hammer business recommends
external cables be rated 75°C for ventilated designs.

Series-Multiple Windings
Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series),
or 240 with a 120 mid-point.

Technical Data
and Specifications
The following pages provide listings for most
standard transformer ratings and styles.

Please refer to Page 9-122.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







Transformers
Filtered Noise Isolation Transformers

9-66

November 2003

Three-Phase

Vol. 1, Ref. No. [0366]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-77. Filtered Noise Isolation Transformers 

kVA

Full Cap. Taps
FCAN

FCBN

°C
Temp.
Rise

Dimensions (Inches)
H

W

D

Weight
Lbs.

Dimensions (mm)
H

W

D

Weight
kg

Style
Number

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts
15
30
45
75

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%
4@-2.5%

150
150
150
150

27-3/8
32-1/4
32-1/4
35-3/4

19
24
24
32

16-9/16
18-1/16
18-1/16
23-11/16

210
320
385
555

695
819
819
908

483
610
610
813

421
459
459
602

95
145
175
252

F48M28T15A
F48M28T30A
F48M28T45A
F48M28T75A

5,670.
6,950.
8,175.
10,400.

112.5
150
225

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

150
150
150

40
46
48

32
35
38-1/2

23-11/16
23-11/16
28-15/16

720
880
1120

1016
1168
1219

813
889
978

602
602
735

327
400
509

F48M28T12A
F48M28T49A
F48M28T22A

11,700.
16,060.
20,650.

208 ∆ Volts to 208Y/120 Volts
15
30
45
75

1@+5%
1@+5%
1@+5%
1@+5%

2@-5%
2@-5%
2@-5%
2@-5%

150
150
150
150

27-3/8
32-1/4
32-1/4
35-3/4

19
24
24
32

16-9/16
18-1/16
18-1/16
23-11/16

210
320
385
555

695
819
819
908

483
610
610
813

421
459
459
602

95
145
175
252

F29R28T15A
F29R28T30A
F29R28T45A
F29R28T75A

6,520.
8,800.
10,200.
13,400.

112.5
150
225

1@+5%
1@+5%
1@+5%

2@-5%
2@-5%
2@-5%

150
150
150

40
46
48

32
35
38-1/2

23-11/16
23-11/16
28-15/16

720
880
1120

1016
1168
1219

813
889
978

602
602
735

327
400
509

F29R28T12A
F29R28T49A
F29R28T22A

15,850.
23,500.
26,790.

9



Not Seismic Qualified.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Low Sound Transformers

9-67

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0367]

Single- and Three-Phase, 60 Hz

Application Description

Product Specifications

Low sound transformers are designed
to have average sound levels 3 dB
below NEMA ST-20 standards.

Frequency

Note: Sound levels are measured in a
sound room, not at the installation.

These quieter transformers are ideal
for noise sensitive installations such as
schools, hospitals, libraries, and offices.
Proper installation procedures should
be used to achieve maximum benefit.
Type DT-3 Low Sound Transformer

Product Description
Types EP, EPT
■
■
■
■
■
■
■

■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC rise
standard.
Available in single-phase ratings
through 37.5 kVA and 4160 volts
primary (EP).
Available in three-phase ratings
through 75 kVA and 4160 volts
primary (EPT).

Types DS-3, DT-3
■
■

■
■
■

■

Ventilated, NEMA 2 enclosure
standard.
Suitable for indoor applications,
outdoors when weathershields are
also installed.
Upright mounting only.
220ºC Insulation System, 150ºC rise
standard.
Available in single-phase ratings
15 – 167 kVA and up to 4160 volts
primary (DS-3).
Available in three-phase ratings
15 – 1500 kVA and up to 4160 volts
primary (DT-3).

Features, Benefits
and Functions
■

UL listed.
60 Hz operation.
■ Short-term overload capability as
required by ANSI.
■

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-78. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Options and Accessories
Please refer to Page 9-120.

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer ventilated transformers,
Types DS-3, DT-3, MD, and KT, utilize a
NEMA 2 rated (drip-proof) enclosure
as standard, and are rated NEMA 3R
with the addition of weathershields.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Low Sound Transformers

9-68

November 2003

Single- and Three-Phase
Sound Levels

Winding Terminations

All Eaton’s Cutler-Hammer 600 volt
class general purpose dry-type distribution transformers are designed to
meet NEMA ST-20 sound levels listed
here. These are the sound levels measured in a soundproof environment.
Actual sound levels measured at an
installation will likely be higher due to
electrical connections and environmental conditions. Lower sound levels
are available and should be specified
when the transformer is going to
be installed in an area where sound
may be a concern.

Primary and secondary windings are
terminated in the wiring compartment.
Ventilated transformers have leads
brought out to aluminum pads that
are pre-drilled to accept Cu/Al lugs.
Lugs are not supplied with these
transformers. The Cutler-Hammer
business recommends external cables
be rated 75°C for ventilated designs.

Table 9-79. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)

9

Vol. 1, Ref. No. [0368]

kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64






Technical Data
and Specifications
Please refer to Page 9-122.

Series-Multiple Windings
Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for
a series or parallel. With the “/”
designation, a mid-point also becomes
available in addition to the series or
parallel connection. As an example, a
120 X 240 winding can be connected
for either 120 (parallel) or 240 (series),
but a 120/240 winding can be connected for 120 (parallel), or 240
(series), or 240 with a 120 mid-point.

For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Low Sound Transformers

9-69

November 2003

Three-Phase

Vol. 1, Ref. No. [0369]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-80. Low Sound Transformers Type DT-3, 60 Hz
kVA

Full Cap. Taps
FCAN

FCBN

Type °C
Dimensions (Inches) Wt. Dimensions (mm) Wt.
Temp. H
Lbs. H
kg
W
D
W
D
Rise

Frame

Wiring
Weathershield
Style
Diagram Catalog Price Number
Number Number U.S. $

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts — Aluminum Windings
15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

30-1/8
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

230
310
310

765
765
765

511
511
511

359
359
359

69 FR910A
141 FR912A
141 FR912A

280B
280B
280B

WS31
WS31
WS31

350. V48M28T15LS42
350. V48M28T30LS42
350. V48M28T45LS42

1,590.
2,050.
2,520.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-1/4
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M28T75LS47
350. V48M28T12LS47
800. V48M28T49LS47

3,530.
5,075.
6,370.

225
300
500

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1100
1600
2400

1422
1581
1905

794
794
1130

616
768
914

499 FR917
728 FR918A
1089 FR919

280B
280B
275A

WS34
WS34
WS35

800. V48M28T22LS52
800. V48M28T33LS52
1,360. V48M28T55LS57

9,325.
11,800.
18,900.

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

115
115
115

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

69 FR910A
141 FR912A
218 FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M28F15LS42
350. V48M28F30LS42
350. V48M28F45LS42

1,890.
2,330.
2,840.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

115
115
115

39-3/8
46-1/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
760
1100

1000
1171
1422

664
712
794

486
585
616

273 FR915B
345 FR916A
499 FR917

280B
280B
280B

WS33
WS19
WS34

350. V48M28F75LS47
350. V48M28F12LS47
800. V48M28F49LS47

4,010.
5,805.
7,290.

225
300
500

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

115
115
115

62-1/4
62-1/4
75

31-1/4
31-1/4
44-1/2

30-1/4
30-1/4
36

1600
1600
2400

1581
1581
1905

794
794
1130

768
768
914

728 FR918A
728 FR918A
1089 FR919

280B
280B
275A

WS34
WS34
WS35

800. V48M28F22LS52
800. V48M28F33LS52
1,360. V48M28F55LS57

10,660.
13,700.
21,700.

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

80
80
80

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

765
765
1000

511
511
664

359
359
486

104 FR910A
141 FR912A
218 FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M28B15LS42
350. V48M28B30LS42
350. V48M28B45LS42

2,160.
2,680.
3,360.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

80
80
80

46-1/8
46-1/8
56

28
28
31-1/4

23
23
24-1/4

760
760
1100

1171
1171
1422

712
712
794

585
585
616

345 FR916A
345 FR916A
499 FR917

280B
280B
280B

WS19
WS19
WS34

350. V48M28B75LS47
350. V48M28B12LS47
800. V48M28B49LS47

4,610.
6,660.
8,370.

225
300

4@-2.5%
4@-2.5%

DT-3
DT-3

80
80

62-1/4
75

31-1/4
44-1/2

30-1/4
36

1600
2400

1581
1905

794
1130

768
914

728 FR918A
1089 FR919

280B
275A

WS34
WS35

800. V48M28B22LS52
1,360. V48M28B33LS52

12,245.
16,000.

2@+2.5%
2@+2.5%

480 ∆ Volts to 208Y/120 Volts — Copper Windings
15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

172
300
370

635
765
765

511
511
511

359
359
359

78 FR909
136 FR910A
168 FR912A

280B
280B
280B

WS31
WS31
WS31

350. V48M28T15CULS42
350. V48M28T30CULS42
350. V48M28T45CULS42

3,000.
2,770.
3,360.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

550
675
850

1000
1000
1171

664
664
712

486
486
585

250 FR914B
361 FR915B
386 FR916A

280B
280B
280B

WS33
WS33
WS19

350. V48M28T75CULS47
350. V48M28T12CULS47
350. V48M28T49CULS47

5,050.
6,900.
9,510.

225
300
500

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

150
150
150

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1200
2150
3100

1422
1581
1905

794
794
1130

616
768
914

545 FR917
977 FR918A
1409 FR919

280B
280B
275A

WS34
WS34
WS35

800. V48M28T22CULS52
800. V48M28T33CULS52
1,360. V48M28T55CULS57

12,690.
16,000.
25,800.

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

115
115
115

25
30-1/8
30-1/8

20-1/8
20-1/8
20-1/8

14-1/8
14-1/8
14-1/8

172
300
370

635
765
765

511
511
511

359
359
359

78 FR909
136 FR910A
168 FR912A

280B
280B
280B

WS31
WS31
WS31

350. V48M28F15CULS42
350. V48M28F30CULS42
350. V48M28F45CULS42

2,600.
3,150.
3,800.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

115
115
115

39-3/8
39-3/8
46-1/8

26-1/8
26-1/8
28

19-1/8
19-1/8
23

550
675
850

1000
1000
1171

664
664
712

486
486
585

250 FR914B
361 FR915B
386 FR916A

280B
280B
280B

WS33
WS33
WS19

350. V48M28F75CULS47
350. V48M28F12CULS47
350. V48M28F49CULS47

5,750.
7,860.
10,700.

225
300
500

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

115
115
115

56
62-1/4
75

31-1/4
31-1/4
44-1/2

24-1/4
30-1/4
36

1200
2150
3100

1422
1581
1905

794
794
1130

616
768
914

545 FR917
977 FR918A
1409 FR919

280B
280B
275A

WS34
WS34
WS35

800. V48M28F22CULS52
800. V48M28F33CULS52
1,360. V48M28F55CULS57

14,340.
18,000.
29,300.

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

80
80
80

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

300
370
550

765
765
1000

511
511
664

359
359
486

136 FR910A
168 FR912A
250 FR914B

280B
280B
280B

WS31
WS31
WS33

350. V48M28B15CULS42
350. V48M28B30CULS42
350. V48M28B45CULS42

3,000.
3,280.
4,370.

75
2@+2.5%
112.5 2@+2.5%
150
2@+2.5%

4@-2.5%
4@-2.5%
4@-2.5%

DT-3
DT-3
DT-3

80
80
80

46-1/8
46-1/8
56

28
28
31-1/4

23
23
24-1/4

850
850
1200

1171
1171
1422

712
712
794

585
585
616

386 FR916A
386 FR916A
545 FR917

280B
280B
280B

WS19
WS19
WS34

350. V48M28B75CULS47
350. V48M28B12CULS47
800. V48M28B49CULS47

6,630.
9,090.
12,400.

225
300

4@-2.5%
4@-2.5%

DT-3
DT-3

80
80

62-1/4
75

31-1/4
44-1/2

30-1/4
36

2150
3100

1581
1905

794
1130

768
914

728 FR918A
1409 FR919

280B
275A

WS34
WS35

800. V48M28B22CULS52
1,360. V48M28B33CULS52

16,650.
20,950.

2@+2.5%
2@+2.5%

Note: Contact Cutler-Hammer for availability of lower sound level designs.
Note: Contact your local Cutler-Hammer sales office for CE Mark transformer requirements.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1






9

Transformers
Marine Duty Transformers

9-70

November 2003

Single- and Three-Phase

Single- and Three-Phase,
Types EPM, DS-3M, EPTM,
DT-3M, 60 Hz
Product Description
Types EP, EPT
■
■
■
■
■

9

■
■
■

■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC rise
standard.
Copper windings standard.
Available in single-phase ratings
through 37.5 kVA and 4160 volts
primary (EP).
Available in three-phase ratings
through 75 kVA and 4160 volts
primary (EPT).

Types DS-3, DT-3
■
■

■
■
■
■

■

Ventilated, NEMA 2 enclosure
standard.
Suitable for indoor applications,
outdoors when weathershields are
also installed.
Upright mounting only.
220ºC Insulation System, 115ºC rise
standard.
Copper windings standard
Available in single-phase ratings
15 – 167 kVA and up to 4160 volts
primary (DS-3).
Available in three-phase ratings
15 – 1500 kVA and up to 4160 volts
primary (DT-3).

Application Description
The basic purpose of a transformer
is voltage transformation as near as
practically possible to the load for
economy and distribution of power.
Typical loads for dry-type distribution
transformers include lighting, heating,
air conditioners, fans, and machine
tools. Such loads are found in commercial, institutional, industrial, and
residential structures.






Vol. 1, Ref. No. [0370]

Features, Benefits
and Functions
■
■
■
■
■
■
■
■
■

UL listed.
Meets IEEE-45 specifications.
Meets Public Health Service
Publication 393 (Rodent Protection).
Meets ABS (American Bureau of
Shipping) specification.
60 Hz operation.
115°C temperature rise standard.
Copper windings standard.
Short-term overload capability as
required by ANSI.
Meet NEMA ST-20 sound levels.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-81. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer ventilated transformers,
Types DS-3M, DT-3M, utilize a NEMA 2
rated (drip-proof) enclosure as standard, and are rated NEMA 3R with the
addition of weathershields. CutlerHammer encapsulated transformers,
Types EPM, EPTM, utilize a NEMA 3R
rated enclosure.

Sound Levels

Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to be
installed in an area where sound may
be a concern.

Overload Capability

Table 9-82. Average Sound Levels

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency

Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

For more information visit: www.cutler-hammer.eaton.com

kVA

NEMA Average 

Sound Level in dB

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65




Applies to general purpose ventilated
transformers only.

CA08101001E

Transformers
Marine Duty Transformers

9-71

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0371]

Winding Terminations

Series-Multiple Windings

Primary and secondary windings are
terminated in the wiring compartment.
Encapsulated units have copper leads
or stabs brought out for connections.
Ventilated transformers have leads
brought out to aluminum pads that are
pre-drilled to accept Cu/Al lugs. Lugs
are not supplied with these transformers. Eaton’s Cutler-Hammer business
recommends external cables be rated
90°C (sized at 75°C ampacity) for
encapsulated designs and 75°C for
ventilated designs.

Series-multiple windings consist of 2
similar coils in each winding which can
be connected in series or parallel (multiple). Transformers with series-multiple
windings are designated with an “X”
or “/” between the voltage ratings, such
as voltages of “120/240” or “240 X 480.”
If the series-multiple winding is designated by an “X,” the winding can be
connected only for a series or parallel.
With the “/” designation, a mid-point
also becomes available in addition to

the series or parallel connection. As
an example, a 120 X 240 winding can
be connected for either 120 (parallel) or
240 (series), but a 120/240 winding can
be connected for 120 (parallel), or 240
(series), or 240 with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-83. Marine Duty Transformers Single-Phase Selection Information — Types EPM, DS-3M, 60 Hz 

Per ABS Requirements, all Marine Duty Transformers are 115ºC and Copper Windings
kVA

Full Cap. Taps
FCAN

Type

FCBN

°C
Temp.
Rise

Dimensions (Inches)
Height

Width

Depth

7
7-1/2
8

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

9
Weight
kg

Style
Number

Price
U.S. $

240 x 480 Volts to 120/240 Volts
3
5
7.5

—
—
—

—
—
—

EPM
EPM
EPM

115
115
115

14-3/4
15
23

7
8
12-1/2

10
15
25

—
—

—
—


EPM
EPM
DS-3M

115
115
115

23
23
31

12-1/2
13
16

37.5
50
75









DS-3M
DS-3M
DS-3M

115
115
115

35
35
39







DS-3M
DS-3M

115
115

50
50

100
167






70
100
170

375
381
584

178
203
318

178
191
203

32
45
77

Q20N11S03CU
Q20N11S05CU
Q20N11S07CU

1,320.
1,450.
1,880.

8
14
19

180
170
270

584
584
787

318
330
406

203
356
483

82
77
122

Q20N11S10CU
Q20N11S15CU
R20P11F25CU

2,280.
2,780.
3,580.

19-1/2
19-1/2
24

21
21
25

420
490
650

889
889
991

495
495
610

533
533
635

191
222
295

R20P11F37CU
R20P11F50CU
R20P11F75CU

4,570.
5,360.
6,860.

32
32

28-1/2
28-1/2

920
1160

1270
1270

813
813

724
724

417
526

R20P11F99CU
R20P11F67CU

9,130.
14,900.

Weight
kg

Style
Number

Not seismic qualified.
Taps 1 @ +5%, 2 @ –5% at 240 volts; 2 @ +2.5%, 4 @ 2.5% at 480 volts.

Table 9-84. Marine Duty Transformers Three-Phase Selection Information — Types EPTM, DT-3M, 60 Hz 
Per ABS Requirements, all Marine Duty Transformers are 115ºC and Copper Windings
kVA

Full Cap. Taps
FCAN

Type

FCBN

°C
Temp.
Rise

Dimensions (Inches)
H

W

D

Weight
Lbs.

Dimensions (mm)
H

W

D

Price
U.S. $

480 ∆ Volts to 208Y/120 Volts
3
6
9

2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5% EPTM
2@-2.5% EPTM
2@-2.5% EPTM

115
115
115

16-1/2
19
21-1/2

12-1/2
16-1/2
17-7/16

15
30
45

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5% DT-3M
4@-2.5% DT-3M
4@-2.5% DT-3M

115
115
115

22
29
29

16-3/4
21-1/2
21-1/2

75
112.5
150

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5% DT-3M
4@-2.5% DT-3M
4@-2.5% DT-3M

115
115
115

38
41
41

225
300
500

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5% DT-3M
2@-2.5% DT-3M
2@-2.5% DT-3M

115
115
115

6
6
7

100
190
275

419
483
546

318
419
443

152
152
178

45
86
125

L48D28T03CU
L48D28T06CU
L48D28T09CU

2,230.
2,510.
2,720.

15
19-1/2
19-1/2

190
305
405

559
737
737

425
546
546

381
495
495

86
138
184

M48M28F15CU
M48M28F30CU
M48M28F45CU

3,085.
3,950.
5,350.

26
32
32

21
25-1/2
25-1/2

650
850
1020

965
1041
1041

660
813
813

533
648
648

295
386
463

M48M28F75CU
M48M28F12CU
M48M28F49CU

7,010.
8,500.
10,850.

51-1/2
51-1/2
59

39-1/2
39-1/2
48-1/2

34
34
38

1450
1680
2550

1308
1308
1499

1003
1003
1232

864
864
965

658
762
1157

M48M28F22CU
M48D28F33CU
M48D28F55CU

14,830.
19,200.
31,020.

480 ∆ Volts to 240 ∆ Volts
6
9
15
30

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

2@-2.5%
2@-2.5%
4@-2.5%
4@-2.5%

EPTM
EPTM
DT-3M
DT-3M

115
115
115
115

19
21-1/2
22
29

16-1/2
17-7/16
16-3/4
21-1/2

6
7
15
19-1/2

190
275
190
305

483
546
559
737

419
443
425
546

152
178
318
495

86
125
86
138

L48D24T06CU
L48D24T09CU
M48M24F15CU
M48M24F30CU

2,510.
2,880.
3,085.
3,950.

45
75
112.5

2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5% DT-3M
4@-2.5% DT-3M
4@-2.5% DT-3M

115
115
115

29
38
41

21-1/2
26
32

19-1/2
21
25-1/2

405
650
850

737
965
1041

546
660
813

495
533
648

184
295
386

M48M24F45CU
M48M24F75CU
M48M24F12CU

5,350.
7,010.
8,500.

150
225
300
500

2@+2.5%
2@+2.5%
2@+2.5%
2@+2.5%

4@-2.5%
4@-2.5%
2@-2.5%
2@-2.5%

115
115
115
115

41
51-1/2
51-1/2
59

32
39-1/2
39-1/2
48-1/2

25-1/2
34
34
38

1020
1450
1680
2550

1041
1308
1308
1499

813
1003
1003
1232

648
864
864
965

463
658
762
1157

M48M24F49CU
M48M24F22CU
M48D24F33CU
M48D24F55CU

10,850.
14,890.
19,200.
32,775.



DT-3M
DT-3M
DT-3M
DT-3M

Not seismic qualified.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






Transformers
Buck-Boost Transformers

9-72

November 2003

Single- and Three-Phase

Single- and Three-Phase
Applications, 60 Hz

Vol. 1, Ref. No. [0372]

Features, Benefits
and Functions
■

UL listed.
60 Hz operation.
■ 600 volt class insulation.
■ Short-term overload capability
as required by ANSI.
■ Meet NEMA ST-20 sound levels.
■

Standards and Certifications
Industry Standards
Type EP

9

Product Description
Types EP, EPT
■
■
■
■
■
■
■

■

Sand and Resin Encapsulated design.
Suitable for indoor or outdoor
applications.
Totally enclosed, non-ventilated
enclosures.
Enclosures are NEMA 3R rated.
Mountable in any position indoors
and upright only outdoors.
185ºC Insulation System, 115ºC rise
standard.
Available in single-phase ratings
through 37.5 kVA and 4160 volts
primary (EP).
Available in three-phase ratings
through 75 kVA and 4160 volts
primary (EPT).

Application Description
A buck-boost transformer is used
to provide an economical method of
correcting a lower or higher voltage
rating more suitable for efficient operation of electrical equipment. Type EP
Buck-Boost transformers are small
kVA, single-phase transformers with
dual primary and dual secondary
windings and are usually connected as
autotransformers by utilizing one unit
for single-phase applications and
either two or three units banked for
three-phase operation. They are primarily used for motor operation and
should not be used for motor control
circuits, to correct fluctuating line
voltage or to obtain a neutral on a
delta system.






All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Seismically Qualified
Cutler-Hammer manufactured dry-type
distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code
(UBC) and California Code Title 24.

Options and Accessories
Please refer to Page 9-120.

Product Specifications
Frequency
Cutler-Hammer buck-boost transformers are designed for 60 Hz operation.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-85. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Enclosures
Cutler-Hammer encapsulated buckboost transformers utilize a NEMA 3R
rated enclosure.

Sound Levels
All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to be
installed in an area where sound may
be a concern.
Table 9-86. Average Sound Levels

Overload Capability

NEMA ST-20 Average Sound Level (dB)

Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.

kVA

Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

For more information visit: www.cutler-hammer.eaton.com

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Winding Terminations
Primary and secondary windings are
terminated in the wiring compartment.
Encapsulated units have copper leads
or stabs brought out for connections.
Lugs are not supplied with these
transformers. The Cutler-Hammer
business recommends external cables
be rated 90°C (sized at 75°C ampacity)
for encapsulated designs.

CA08101001E

Transformers
Buck-Boost Transformers

9-73

November 2003
Vol. 1, Ref. No. [0373]

Series-Multiple Windings
Series-multiple windings consist of 2
similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series),
or 240 with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.
Note: When installation is to be made on a
grounded system, consideration must be
given to the resulting voltage. Thus, on a
208 grounded wye/120 system the voltage
can be boosted to 240 volts but the voltage
to ground will be 139 volts. If 240/120 volts
with a mid-point ground is needed, a standard two-winding transformer must be used.

The following formulas can be used to
calculate specific requirements.
For Single-Phase:
Load Voltage x
Full Line Amperes
LOAD kVA = --------------------------------------------1000

For Three-Phase:
Line Load Voltage x 1.73 x
Full Load Amperes
LOAD kVA = -----------------------------------------------------------------1000

CA08101001E

Single- and Three-Phase

Product Selection

5-Step Selector

For quick selection data, refer to the
tables on the following pages.

The tables which follow will simplify
the selection of the buck-boost transformers. There are no calculations
needed; simply follow these 5 steps.

Selection Requirements
You should have the following
information before selecting a
buck-boost transformer.
Line Voltage
The voltage that you want to buck
(decrease) or boost (increase). This
can be found by measuring the supply
line voltage with a voltmeter.
Load Voltage
The voltage at which your equipment
is designed to operate. This is listed on
the nameplate of the load equipment.
Load Amperes or Load kVA
You do not need to know both — one
or the other is sufficient for selection
purposes. This information usually can
be found on the nameplate of the
equipment that you want to operate.
Frequency
The supply line frequency must be the
same as the frequency of the equipment to be operated — Eaton’s CutlerHammer Buck-Boost Transformers
operate at 60 Hz only.
Phase
The supply line should be the same as
the equipment to be operated — either
single or three-phase.

Transformer Interconnection
For three-phase applications, interconnections of transformers should be
made in a junction box. Two or three
transformers may be used depending
on an open delta (2) or wye (3)
connection.

For more information visit: www.cutler-hammer.eaton.com

1. Refer to the table having the same
output voltage as the equipment
you want to operate. For example,
if you are installing a 240 volt 6 kVA
single-phase load use Selection
Table 9-91.
2. Select the available line voltage
across the top of the chart which
is closest to the actual supply voltage. Therefore, for example, if the
available line voltage is 213 volts,
use the 212 volt column.
3. Read down the column until you
reach an output kVA or amps rating equal to or greater than the
load requirements. Since 6 kVA, in
the example, is not listed, use the
next higher rating or 7.5 kVA.
4. Read across to the far left columns
for the catalog number and quantity of transformers for your application. In this case, you will need
one (1) catalog number
S10N06A01N.
5. Connect the buck-boost transformer(s) you have selected in
accordance with the connection
diagram specified at the bottom of
the available line voltage column.
In this example, Diagram “F”
would be used.
Note: For 1-phase connections and 3-phase
open delta connections, inputs and outputs
may be reversed. kVA capacity remains
constant.

Additional Product Selection
information begins on Page 9-136.






9

Transformers
Buck-Boost Transformers

9-74

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0374]

Wiring Diagrams
Diagram A

Diagram B

Diagram C

High Voltage
X3

X4

X1

X2

X1

X2 X3

X3

X4

X1

X2
H3

H3

H4

H3

H4

H2

H1

H2

H1

H2

Diagram E

Diagram F

Low Voltage

X1

High Voltage

High Voltage

X2 X3

X4

H4

H3

H2

H1

X3

X4

X1

X2

H4

H3

X1

H2

H1

H4

X2

H4

X4

H2

X3

X4

X1

X2

X3

X2

X1

X3

X4

X4

X3

X2

X2

X1

H1 H1

H2

Low Voltage

X1 X2 X3 X4

X4 X3 X2 X1

H4 H3 H2 H1

H1 H2 H3 H4

X1 X2 X3 X4

X4 X3 X2 X1

H4 H3 H2 H1

H1 H2 H3 H4

High Voltage

Low Voltage

Low Voltage

Diagram M 


Diagram N 


High Voltage

Diagram O 

Low Voltage

High Voltage

X4

X3

X4
X1

X3
X2

H1 H2 H3 H4

Diagram L
High Voltage

X1

X3

X4

X2

Low Voltage

Diagram K

X4

X4

X1

H4 H3 H2 H1

H1

High Voltage

H2

X3

Low Voltage

High Voltage

Diagram J

H1

High Voltage

H2

H1

H2

Diagram I
High Voltage

X3

H3

H3

X4

Low Voltage

Diagram H
Low Voltage

X1

X2 X3

Low Voltage

High Voltage

Diagram G

H1

High Voltage

Low Voltage

Diagram D

X3

X4

H4

Low Voltage

9

Low Voltage

High Voltage

X1
X4

X3
X2

X1
X4

X3

X4

X3

X4

X3

X4

X3
X2

X4

X1
H4

X2
H3

X1
H4

X2
H3

X1
H4

X2
H3

H4

H3

H4

H3

H4

H3

X1
H4

X2
H3

X1
H4

X2
H3

X1
H4

X2
H3

H2

H1

H2

H1

H2

H1

H2

H1

H2

H1

H2

H1

H2

H1

H2

H1

H2

H1

Low Voltage

Neutral

Diagram Q 

X3

X4

X2

X4

X2

X4

X3

X1

X3

H4

H3

H4

H3

H4

H3

H2

H1

H2

H1

H2

H1

X1

X3

X1

X2
H3

H4

X4
X3

H3
H4

X2
X1

H1
H2

High Voltage
X3

X4

X2
H3

H4

X1

H1
H2

H3 H1
H4 H2

Low Voltage

H3
H4

X3

X2
X1

H1
H2

High Voltage

X4
X3

H3
H4

X1

X2

X4

H4

H3

H1
H2

H4

X3

X1

X2

X4

H3

H1

X3
X2

X4

H3 H1

H2

H4 H2

Low Voltage

Neutral

Neutral

Diagram U
High Voltage

High Voltage

X4
X3

X1

X2

Diagram T
Low Voltage

X2

X4

X1

H1
H2

Neutral

High Voltage

Diagram S 


X1

X3

X4

X1

Neutral

Diagram R 


High Voltage

Low Voltage
X2

High Voltage

Neutral

Low Voltage

Diagram P 


X3

X4

X4

X3

X1

X2

X2

X1

X3

X4

X1

X2

H1
H4

H2

H1

H1

H4

Low Voltage

Neutral

H1

H4

Low Voltage

Figure 9-2. Buck-Boost Transformers Wiring Diagrams



WARNING! If input is 3-wire, “neutral” connection must be isolated and insulated! When used to supply a 3-phase, 4-wire load, the source must be
3-phase, 4-wire wye.






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Buck-Boost Transformers

9-75

November 2003

Single- and Three-Phase

Vol. 1, Ref. No. [0375]

Table 9-87. Selection Information
kVA

°C Temp.
Rise

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Frame

Style
Number

Price
U.S. $

FR52
FR54
FR55

S10N04A81N
S10N04A82N
S10N04A83N

100.
105.
115.

120 x 240 Volts to 12/24 Volts
.05
.10
.15

115
115
115

6-1/2
6-1/2
6-1/2

3-7/8
3-7/8
3-7/8

3-1/2
3-1/2
3-1/2

7
7
8

165
165
165

98
98
98

89
89
89

3
3
4

.25
.50
.75

115
115
115

6-1/2
6-1/2
8-3/8

4-7/8
4-7/8
6

3-7/8
4-5/8
5-3/4

12
13
21

165
165
213

124
124
152

98
117
146

5
5
10

FR56
FR57
FR58A

S10N04A26N
S10N04A51N
S10N04A76N

150.
175.
230.

1
1.5
2

115
115
115

8-3/8
10-3/4
10-3/4

6
6-3/16
6-3/16

5-3/4
6-1/8
6-1/8

31
40
40

213
273
273

152
157
157

146
156
156

14
18
18

FR59A
FR67
FR68

S10N04A01N
S10N04A16N
S10N04A02N

270.
360.
470.

3
5
7.5

115
115
115

14-1/8
16
16

7-11/16
10-3/8
10-3/8

8
9-7/8
9-7/8

65
113
123

359
406
406

195
263
263

203
251
251

29
51
55

FR176
FR177
FR178

S10N04A03N
S10N04A05N
S10N04A07N

635.
1,180.
1,650.

FR52
FR54
FR55

S10N06A81N
S10N06A82N
S10N06A83N

100.
105.
115.

120 x 240 Volts to 16/32 Volts
.05
.10
.15

115
115
115

6-1/2
6-1/2
6-1/2

3-7/8
3-7/8
3-7/8

3-1/2
3-1/2
3-1/2

7
7
8

165
165
165

98
98
98

89
89
89

3
3
4

.25
.50
.75

115
115
115

6-1/2
6-1/2
8-3/8

4-7/8
4-7/8
6

3-7/8
4-5/8
5-3/4

12
13
21

165
165
213

124
124
152

98
117
146

5
5
10

FR56
FR57
FR58A

S10N06A26N
S10N06A51N
S10N06A76N

150.
175.
230.

1
1.5
2

115
115
115

8-3/8
10-3/4
10-3/4

6
6-3/16
6-3/16

5-3/4
6-1/8
6-1/8

31
40
40

213
273
273

152
157
157

146
156
156

14
18
18

FR59A
FR67
FR68

S10N06A01N
S10N06A16N
S10N06A02N

270.
360.
470.

3
5
7.5

115
115
115

14-1/8
16
16

7-11/16
10-3/8
10-3/8

8
9-7/8
9-7/8

65
113
123

359
406
406

195
263
263

203
251
251

29
51
55

FR176
FR177
FR178

S10N06A03N
S10N06A05N
S10N06A07N

635.
1,180.
1,650.

FR52
FR54
FR55

S20N08A81N
S20N08A82N
S20N08A83N

110.
125.
135.

240 x 480 Volts to 24/48 Volts
.05
.10
.15

115
115
115

6-1/2
6-1/2
6-1/2

3-7/8
3-7/8
3-7/8

3-1/2
3-1/2
3-1/2

7
7
8

165
165
165

98
98
98

89
89
89

3
3
4

.25
.50
.75

115
115
115

6-1/2
6-1/2
8-3/8

4-7/8
4-7/8
6

3-7/8
4-5/8
5-3/4

12
13
21

165
165
213

124
124
152

98
117
146

5
5
10

FR56
FR57
FR58A

S20N08A26N
S20N08A51N
S20N08A76N

165.
210.
270.

1
1.5
2

115
115
115

8-3/8
10-3/4
10-3/4

6
6-3/16
6-3/16

5-3/4
6-1/8
6-1/8

31
40
40

213
273
273

152
157
157

146
156
156

14
18
18

FR59A
FR67
FR68

S20N08A01N
S20N08A16N
S20N08A02N

310.
420.
570.

3
5
7.5

115
115
115

14-1/8
16
16

7-11/16
10-3/8
10-3/8

8
9-7/8
9-7/8

65
113
123

359
406
406

195
263
263

203
251
251

29
51
55

FR176
FR177
FR178

S20N08A03N
S20N08A05N
S20N08A07N

740.
1,290.
2,000.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Buck-Boost Transformers

9-76

November 2003

Single-Phase

Vol. 1, Ref. No. [0376]

Table 9-88. Single-Phase 115 Volt Output Required, 60 Hz
Units
Unit
Required 
 kVA

Input Available Voltage
84

91

Output

9

96

Output

100

Output

Style
Number

102

Output

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

1
1
1

.05
.05
.10

—
.13
—

—
1.14
—

—
.18
—

—
1.56
—

.24
—
.48

2.09
—
4.17

—
.31
—

—
2.70
—

—
.36
—

—
3.13
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

1
1
1

.10
.15
.15

.26
—
.39

2.29
—
3.44

.36
—
.54

3.12
—
4.69

—
.72
—

—
6.25
—

.62
—
.93

5.41
—
8.12

.72
—
1.08

6.25
—
9.37

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

1
1
1

.25
.25
.50

—
.659
—

—
5.73
—

—
.899
—

—
7.81
—

1.2
—
2.4

10.4
—
20.8

—
1.56
—

—
13.5
—

—
1.8
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

1
1
1

.50
.75
.75

1.32
—
1.98

11.5
—
17.2

1.8
—
2.7

15.6
—
23.4

—
3.6
—

—
31.2
—

3.11
—
4.67

27.1
—
40.6

3.59
—
5.39

31.2
—
46.8

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

1
1
1

1
1
1.5

—
2.64
—

—
22.9
—

—
3.59
—

—
31.2
—

4.79
—
7.2

41.7
—
62.5

—
6.23
—

—
54.1
—

—
7.19
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

3.95
—
5.27

34.4
—
45.8

5.39
—
7.19

46.9
—
62.5

—
9.58
—

—
83.3
—

9.34
—
12.5

81.2
—
108

10.8
—
14.4

93.7
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

—
7.92
—

—
68.7
—

—
10.77
—

—
93.6
—

14.37
—
23.95

125.1
—
208.5

—
18.69
—

—
162.3
—

—
21.57
—

—
187.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

13.2
—
19.8

115
—
172

18
—
27

156
—
234

—
36
—

—
312
—

31.15
—
46.7

270.5
—
406

35.95
—
53.9

312.5
—
468

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

D

Unit
Units
Required 
 kVA

Input Available Voltage

B

105

127

Output

Output

B

C

A

130

138

146

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

1
1
1

.05
.05
.10

.48
—
.96

4.17
—
8.33

.54
—
1.1

4.58
—
9.17

—
.41
—

—
3.54
—

.29
—
.58

2.5
—
5.0

—
.23
—

—
1.98
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

1
1
1

.10
.15
.15

—
1.44
—

—
12.5
—

—
1.6
—

—
13.7
—

.82
—
1.3

7.08
—
10.6

—
.87
—

—
7.5
—

.46
—
.69

3.95
—
5.93

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

1
1
1

.25
.25
.50

2.39
—
4.79

20.8
—
41.6

2.63
—
5.27

22.9
—
45.8

—
2.03
—

—
17.7
—

1.44
—
2.87

12.5
—
25

—
1.14
—

—
9.88
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

1
1
1

.50
.75
.75

—
7.19
—

—
62.4
—

—
7.9
—

—
68.7
—

4.07
—
6.1

35.4
—
53.1

—
4.31
—

—
37.5
—

2.27
—
3.41

19.8
—
29.6

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

1
1
1

1
1
1.5

9.58
—
14.4

83.3
—
125

10.5
—
15.8

91.7
—
137

—
8.14
—

—
70.8
—

5.75
—
8.62

50
—
75

—
4.55
—

—
39.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

—
19.2
—

—
16.7
—

—
21.1
—

—
183
—

12.2
—
16.3

106
—
142

—
11.5
—

—
100
—

6.82
—
9.10

59.3
—
79.2

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

28.7
—
47.9

249.9
—
416.5

31.5
—
52.5

275.1
—
458.5

—
24.4
—

—
212.4
—

17.3
—
28.7

150
—
250

—
13.6
—

—
118.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

—
71.9
—

—
624
—

—
79
—

—
687
—

40.7
—
61

354
—
531

—
43.1
—

—
357
—

22.7
—
34.1

197.5
—
296

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




A

A

A

B

B

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Buck-Boost Transformers

9-77

November 2003

Single-Phase

Vol. 1, Ref. No. [0377]

Table 9-89. Single-Phase 120 Volt Output Required, 60 Hz
Units
Unit
Required 
 kVA

Input Available Voltage
88

95

Output

100

Output

104

Output

Style
Number

106

Output

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

1
1
1

.05
.05
.10

—
.14
—

—
1.15
—

—
.19
—

—
1.56
—

.25
—
.50

2.09
—
4.17

—
.33
—

—
2.70
—

—
.38
—

—
3.13
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

1
1
1

.10
.15
.15

.28
—
.41

2.29
—
3.44

.38
—
.56

3.12
—
4.69

—
.75
—

—
6.25
—

.65
—
.98

5.41
—
8.12

.75
—
1.12

6.25
—
9.37

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

1
1
1

.25
.25
.50

—
.687
—

—
5.73
—

—
.937
—

—
7.81
—

1.25
—
2.5

10.4
—
20.8

—
1.62
—

—
13.5
—

—
1.87
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

1
1
1

.50
.75
.75

1.37
—
2.06

11.5
—
17.2

1.87
—
2.82

15.6
—
23.4

—
3.75
—

—
31.2
—

3.25
—
4.87

27.1
—
40.6

3.75
—
5.62

31.2
—
46.8

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

1
1
1

1
1
1.5

—
2.75
—

—
22.9
—

—
3.75
—

—
31.2
—

5
—
7.5

41.7
—
62.5

—
6.5
—

—
54.1
—

—
7.5
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

4.12
—
5.5

34.4
—
45.8

5.62
—
7.5

46.9
—
62.5

—
10
—

—
83.3
—

9.75
—
13

81.2
—
108

11.2
—
15

93.7
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

—
8.25
—

—
68.7
—

—
11.25
—

—
93.6
—

15
—
25

125.1
—
208.5

—
19.5
—

—
162.3
—

—
22.5
—

—
187.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

13.75
—
20.6

114.5
—
172

18.75
—
28.2

156
—
234

—
37.5
—

—
312
—

32.5
—
48.7

270.5
—
406

37.5
—
56.2

312.5
—
468

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

D

Unit
Units
Required 
 kVA

Input Available Voltage

B

109

132

Output

Output

B

C

A

136

144

152

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

1
1
1

.05
.05
.10

.5
—
1.0

4.17
—
8.33

.55
—
1.1

4.58
—
9.17

—
.43
—

—
3.54
—

.3
—
.6

2.5
—
5.0

—
.24
—

—
1.98
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

1
1
1

.10
.15
.15

—
1.5
—

—
12.5
—

—
1.6
—

—
13.7
—

.85
—
1.27

7.08
—
10.6

—
.9
—

—
7.5
—

.48
—
.71

3.95
—
5.93

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

1
1
1

.25
.25
.50

2.5
—
5

20.8
—
41.6

2.75
—
5.5

22.9
—
45.8

—
2.12
—

—
17.7
—

1.5
—
3

12.5
—
25

—
1.19
—

—
9.88
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

1
1
1

.50
.75
.75

—
7.5
—

—
62.4
—

—
8.25
—

—
68.7
—

4.25
—
6.37

35.4
—
53.1

—
4.5
—

—
37.5
—

2.37
—
3.56

19.8
—
29.6

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

1
1
1

1
1
1.5

10
—
15

83.3
—
125

11
—
16.5

91.7
—
137

—
8.5
—

—
70.8
—

6
—
9

50
—
75

—
4.75
—

—
39.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

—
20
—

—
167
—

—
22
—

—
183
—

12.7
—
17

106
—
142

—
12
—

—
100
—

7.12
—
9.5

59.3
—
79.2

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

30
—
50

249.9
—
416.5

33
—
55

275.1
—
458.5

—
25.5
—

—
212.4
—

18
—
30

150
—
250

—
14.25
—

—
118.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

—
75
—

—
624
—

—
82.5
—

—
687
—

42.5
—
63.7

354
—
531

—
45
—

—
375
—

23.7
—
35.6

197.5
—
296

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




A

A

A

B

B

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol. . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Buck-Boost Transformers

9-78

November 2003

Single-Phase

Vol. 1, Ref. No. [0378]

Table 9-90. Single-Phase 230 Volt Output Required, 60 Hz
Units
Unit
Required 
 kVA

Input Available Voltage
199

203

Output

9

207

Output

209

Output

kVA

Amps

kVA

Amps

kVA

—

—
1.36
—

—
.36
—

—
1.56
—

—

.72
—
1.08

3.12
—
4.69

Style
Number

216

Output

Price
U.S. $

Output

Amps

kVA

Amps

kVA

Amps

.48
—
.96

2.08
—
4.17

—
.72

.86

1.88
—
3.75

—

—
3.12
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

—
1.29
—

—
5.62
—

—
1.44
—

—
6.25
—

1.44
—
2.16

6.25
—
9.37

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

1
1
1

.05
.05
.10

1
1
1

.10
.15
.15

—
.93

2.71
—
4.06

1
1
1

.25
.25
.50

—
1.55
—

—
6.77
—

—
1.8
—

—
7.81
—

2.15
—
4.31

9.37
—
18.7

2.39
—
4.79

10.4
—
20.8

—
3.59
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

1
1
1

.50
.75
.75

3.11
—
4.66

13.5
—
20.3

3.6
—
5.4

15.6
—
23.4

—
6.46
—

—
28.2
—

—
7.19
—

—
31.2
—

7.19
—
10.8

31.2
—
46.8

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

.31
—
.62

.43

1
1
1

1
1
1.5

—
6.23
—

—
27.1
—

—
7.2
—

—
31.2
—

8.62
—
12.9

37.5
—
56.2

9.58
—
14.4

41.7
—
62.5

—
14.4
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

9.34
—
12.5

40.6
—
54.2

10.8
—
14.4

46.9
—
62.5

—
17.2
—

—
75
—

—
19.2
—

—
83.3
—

21.6
—
28.7

93.7
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

—
18.6
—

—
81.3
—

—
21.6
—

—
93.6
—

25.8
—
43.1

112.5
—
187.5

28.7
—
47.9

125.1
—
208.5

—
43.2
—

—
187.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

31.1
—
46.6

135.5
—
203

36
—
54

156
—
234

—
64.6
—

—
282
—

—
71.9
—

—
312
—

72
—
108

312.5
—
468

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

G

Unit
Units
Required 
 kVA

219

F

G

F

E

246

253

260

Input Available Voltage
242

Output

Output

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

1
1
1

.05
.05
.10

.96
—
1.92

4.16
—
8.33

1.0
—
2.01

4.38
—
8.75

—
.77
—

—
3.34
—

.53
—
1.05

2.29
—
4.58

—
.41
—

—
1.77
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

1
1
1

.10
.15
.15

—
2.87
—

—
12.5
—

—
3.02
—

—
13.1
—

1.53
—
2.3

6.67
—
10.0

—
1.58
—

—
6.87
—

.82
—
1.22

3.54
—
5.31

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

1
1
1

.25
.25
.50

4.79
—
9.58

20.8
—
41.6

5.03
—
10.1

21.9
—
43.7

—
3.83
—

—
16.7
—

2.63
—
5.27

11.5
—
22.9

—
2.04
—

—
8.85
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

1
1
1

.50
.75
.75

—
14.4
—

—
62.4
—

—
15.1
—

—
65.6
—

7.67
—
11.5

33.3
—
50

—
7.9
—

—
34.4
—

4.07
—
6.11

17.7
—
26.6

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

1
1
1

1
1
1.5

19.2
—
28.7

83.3
—
125

20.1
—
30.2

87.5
—
131

—
15.3
—

—
66.7
—

10.5
—
15.8

45.8
—
68.7

—
8.15
—

—
35.4
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

—
38.3
—

—
167
—

—
40.2
—

—
175
—

23
—
30.7

100
—
133

—
21.1
—

—
91.7
—

12.2
—
16.3

53.1
—
70.8

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

57.6
—
96

249.9
—
416.5

60.3
—
100.5

262.5
—
437.5

—
45.9
—

—
200.1
—

31.5
—
52.5

137.4
—
229

—
24.4
—

—
106.2
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

—
144
—

—
624
—

—
151
—

—
656
—

76.5
—
115

333.5
—
500

—
79
—

—
344
—

40.7
—
61.1

177
—
266

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




E

E

E

F

F

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol. . . . . . . . . . . . . . . . . . . . . . . . . DT-1






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Buck-Boost Transformers

9-79

November 2003

Single-Phase

Vol. 1, Ref. No. [0379]

Table 9-91. Single-Phase 240 Volt Output Required, 60 Hz
Units
Unit
Required 
 kVA

Input Available Voltage
208

212

Output

216

Output

Output

kVA

Amps

kVA

Amps

kVA

—

—
1.35
—

—

—
1.56
—

—

1
1
1

.05
.05
.10

1
1
1

.10
.15
.15

—

1
1
1

.25
.25
.50

1
1
1

.50
.75
.75

.32
—
.65

.38
—
.75

218

Style
Number

225

Output

Price
U.S. $

Output

Amps

kVA

Amps

kVA

Amps

1.88
—
3.75

.5
—
1.0

2.08
—
4.17

—
.75
—

—
3.12
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

—
1.35
—

—
5.62
—

—
1.5
—

—
6.25
—

1.5
—
2.25

6.25
—
9.37

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

.45
.9

.98

2.71
—
4.06

—
1.12

3.12
—
4.69

—
1.62
—

—
6.77
—

—
1.87
—

—
7.81
—

2.25
—
4.5

9.37
—
18.7

2.5
—
5

10.4
—
20.8

—
3.75
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

3.25
—
4.87

13.5
—
20.3

3.75
—
5.62

15.6
—
23.4

—
6.75
—

—
28.2
—

—
7.5
—

—
31.2
—

7.5
—
11.2

31.2
—
46.8

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

1
1
1

1
1
1.5

—
6.5
—

—
27.1
—

—
7.5
—

—
31.2
—

9
—
13.5

37.5
—
56.2

10
—
15

41.7
—
62.5

—
15
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

9.75
—
13

40.6
—
54.2

11.2
—
15

46.9
—
62.5

—
18
—

—
75
—

—
20
—

—
83.3
—

22.5
—
30

93.7
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

—
19.5
—

—
81.3
—

—
22.5
—

—
93.6
—

27
—
45

112.5
—
187

30
—
50

125.1
—
208

—
45
—

—
187.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

32.5
—
48.7

135
—
203

37.5
—
56.2

156
—
234

—
67.5
—

—
282
—

—
75
—

—
312
—

75
—
112

312
—
468

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

G

Unit
Units
Required 
 kVA

Input Available Voltage

F

229

252

Output

Output

G

F

E

256

264

272

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

1
1
1

.05
.05
.10

1.0
—
2.0

4.16
—
8.33

1.05
—
2.1

4.38
—
8.75

—

.55
—
1.1

2.29
—
4.58

.42

—

—
3.33
—

—

.8

—

—
1.77
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

1
1
1

.10
.15
.15

—
3.0
—

—
12.5
—

—
3.15
—

—
13.1
—

1.6
—
2.4

6.67
—
10.0

—
1.65
—

—
6.87
—

.85
—
1.27

3.54
—
5.31

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

1
1
1

.25
.25
.50

5
—
10

20.8
—
41.6

5.25
—
10.5

21.9
—
43.7

—
4
—

—
16.7
—

2.75
—
5.5

11.5
—
22.9

—
2.12
—

—
8.85
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

1
1
1

.50
.75
.75

—
15
—

—
62.4
—

—
15.7
—

—
65.6
—

8
—
12

33.3
—
50

—
8.25
—

—
34.4
—

4.25
—
6.37

17.7
—
26.6

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

1
1
1

1
1
1.5

20
—
30

83.3
—
125

21
—
31.5

87.5
—
131

—
16
—

—
66.7
—

11
—
16.5

45.8
—
68.7

—
8.5
—

—
35.4
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

1
1
1

1.5
2
2

—
40
—

—
167
—

—
42
—

—
175
—

24
—
32

100
—
133

—
22
—

—
91.7
—

12.7
—
17

53.1
—
70.8

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

1
1
1

3
3
5

60
—
100

249.9
—
416.5

63
—
105

262.5
—
437.5

—
48
—

—
200.1
—

33
—
55

137.4
—
229

—
25.5
—

—
106.2
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

1
1
1

5
7.5
7.5

—
150
—

—
624
—

—
157
—

—
656
—

80
—
120

333
—
500

—
82.5
—

—
344
—

42.5
—
63.7

177
—
266

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




E

E

E

F

F

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Buck-Boost Transformers

9-80

November 2003

Three-Phase

Vol. 1, Ref. No. [0380]

Table 9-92. Three-Phase Open Delta Connection 230 Volt Output Required, 60 Hz
Units
Unit
Required 
 kVA

Input Available Voltage
199

203

Output

9

207

Output

209

Output

Style
Number

216

Output

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

2
2
2

.05
.05
.10

—

.62

—

—
1.35
—

—

.54

—

—
1.56
—

.75
—
1.49

1.87
—
3.75

.83
—
1.66

2.08
—
4.17

—
1.24
—

—
3.12
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

2
2
2

.10
.15
.15

1.08
—
1.62

2.71
—
4.06

1.24
—
1.87

3.12
—
4.69

—
2.24
—

—
5.62
—

—
2.49
—

—
6.25
—

2.49
—
3.73

6.25
—
9.37

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

2
2
2

.25
.25
.50

—
2.7
—

—
6.77
—

—
3.11
—

—
7.81
—

3.3
—
7.47

9.37
—
18.7

4.15
—
8.3

10.4
—
20.8

—
6.22
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

2
2
2

.50
.75
.75

5.39
—
8.09

13.5
—
20.3

6.22
—
9.33

15.6
—
23.4

—
11.2
—

—
28.2
—

—
12.4
—

—
31.2
—

12.4
—
18.7

31.2
—
46.8

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

2
2
2

1
1
1.5

—
10.8
—

—
27.1
—

—
12.4
—

—
31.2
—

14.9
—
22.4

37.5
—
56.2

16.6
—
24.9

41.7
—
62.5

—
24.9
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

2
2
2

1.5
2
2

16.2
—
21.6

40.6
—
54.2

18.7
—
24.9

46.9
—
62.5

—
29.9
—

—
75
—

—
33.2
—

—
83.3
—

37.3
—
49.8

93.7
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

2
2
2

3
3
5

—
32.4
—

—
81.3
—

—
32.7
—

—
93.6
—

44.7
—
74.7

112.5
—
187

49.8
—
83

125.1
—
208

—
74.7
—

—
187.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

2
2
2

5
7.5
7.5

53.9
—
80.9

135
—
203

62.2
—
93.3

156
—
234

—
112
—

—
282
—

—
124
—

—
312
—

124
—
187

312.5
—
468

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

L

Unit
Units
Required 
 kVA

Input Available Voltage

K

219

242

Output

Output

L

K

I

246

253

260

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

2
2
2

.05
.05
.10

1.66
—
3.32

4.17
—
8.33

1.74
—
3.48

4.37
—
8.75

—
1.33
—

—
3.33
—

.91
—
1.83

2.29
—
4.58

—
.70
—

—
1.77
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

2
2
2

.10
.15
.15

—
4.98
—

—
12.5
—

—
5.23
—

—
13.1
—

2.65
—
3.98

6.67
—
10.0

—
2.74
—

—
6.87
—

1.41
—
2.12

3.54
—
5.13

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

2
2
2

.25
.25
.50

8.3
—
16.6

20.8
—
41.7

8.71
—
17.4

21.9
—
43.7

—
6.64
—

—
16.7
—

4.56
—
9.73

11.5
—
22.9

—
3.52
—

—
8.85
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

2
2
2

.50
.75
.75

—
24.9
—

—
62.4
—

—
26.1
—

—
65.6
—

13.3
—
19.9

33.3
—
50

—
13.7
—

—
34.4
—

7.05
—
10.6

17.7
—
26.6

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

2
2
2

1
1
1.5

33.2
—
49.8

83.3
—
125

34.8
—
52.3

87.5
—
131

—
26.5
—

—
66.7
—

18.3
—
27.4

45.8
—
68.7

—
14.1
—

—
35.4
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

2
2
2

1.5
2
2

—
66.4
—

—
167
—

—
69.7
—

—
175
—

39.8
—
53.1

100
—
133

—
36.5
—

—
91.7
—

21.2
—
28.2

53.1
—
70.8

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

2
2
2

3
3
5

99.6
—
166

249.9
—
417

104.4
—
174

262.5
—
437

—
79.5
—

—
200
—

54.9
—
91.3

137.4
—
229

—
42.3
—

—
106.2
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

2
2
2

5
7.5
7.5

—
249
—

—
624
—

—
261
—

—
656
—

133
—
199

333
—
500

—
137
—

—
344
—

70.5
—
106

177
—
266

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




I

I

I

K

K

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Buck-Boost Transformers

9-81

November 2003

Three-Phase

Vol. 1, Ref. No. [0381]

Table 9-93. Three-Phase Open Delta Connection 240 Volt Output Required, 60 Hz
Units
Unit
Required 
 kVA

Input Available Voltage
208

212

Output

216

Output

218

Output

Style
Number

225

Output

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

2
2
2

.05
.05
.10

—

.65

—

—
1.35
—

—

.56

—

—
1.56
—

.73
—
1.56

1.87
—
3.75

.87
—
1.73

2.08
—
4.17

—
1.3
—

—
3.12
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

2
2
2

.10
.15
.15

1.13
—
1.69

2.71
—
4.06

1.3
—
1.95

3.12
—
4.69

—
2.34
—

—
5.62
—

—
2.6
—

—
6.25
—

2.6
—
3.9

6.25
—
9.37

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

2
2
2

.25
.25
.50

—
2.81
—

—
6.77
—

—
3.25
—

—
7.81
—

3.9
—
7.79

9.37
—
18.7

4.33
—
8.66

10.4
—
20.8

—
6.49
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

2
2
2

.50
.75
.75

5.63
—
8.44

13.5
—
20.3

6.5
—
9.75

15.6
—
23.4

—
11.7
—

—
28.2
—

—
13
—

—
31.2
—

13
—
19.5

31.2
—
46.8

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

2
2
2

1
1
1.5

—
11.3
—

—
27.1
—

—
13
—

—
31.2
—

15.6
—
23.4

37.5
—
56.2

17.3
—
26

41.7
—
62.5

—
26
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

2
2
2

1.5
2
2

16.9
—
22.5

40.6
—
54.2

19.5
—
26

46.9
—
62.5

—
31.2
—

—
75
—

—
34.6
—

—
83.3
—

39
—
52

93.7
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

2
2
2

3
3
5

—
33.9
—

—
81.3
—

—
39
—

—
93.6
—

46.8
—
77.9

112.5
—
187

51.9
—
86.6

125.1
—
208

—
78
—

—
187.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

2
2
2

5
7.5
7.5

56.3
—
84.4

135
—
203

65
—
97.5

156
—
234

—
117
—

—
282
—

—
130
—

—
312
—

130
—
195

312
—
468

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

L

Unit
Units
Required 
 kVA

229

K

L

K

I

256

264

272

Input Available Voltage
252

Output

Output

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

2
2
2

.05
.05
.10

1.73
—
3.46

4.16
—
8.33

1.82
—
3.64

4.37
—
8.75

—
1.38
—

—
3.33
—

.95
—
1.91

2.29
—
4.58

—
.74
—

—
1.77
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

2
2
2

.10
.15
.15

—
5.19
—

—
12.5
—

—
5.45
—

—
13.1
—

2.77
—
4.15

6.67
—
10.0

—
2.86
—

—
6.87
—

1.47
—
2.21

3.54
—
5.31

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

2
2
2

.25
.25
.50

8.66
—
17.3

20.8
—
41.6

9.09
—
18.2

21.9
—
43.7

—
6.92
—

—
16.7
—

4.76
—
9.53

11.5
—
22.9

—
3.68
—

—
8.85
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

2
2
2

.50
.75
.75

—
26
—

—
62.4
—

—
27.3
—

—
65.6
—

13.8
—
20.8

33.3
—
50

—
14.3
—

—
34.4
—

7.36
—
11

17.7
—
26.6

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

2
2
2

1
1
1.5

34.6
—
51.9

83.3
—
125

36.4
—
54.5

87.5
—
131

—
27.7
—

—
66.7
—

19.1
—
28.6

45.8
—
68.7

—
14.7
—

—
35.4
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

2
2
2

1.5
2
2

—
69.3
—

—
167
—

—
72.7
—

—
175
—

41.5
—
55.4

100
—
133

—
38.1
—

—
91.7
—

22.1
—
29.4

53.1
—
70.8

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

2
2
2

3
3
5

103.8
—
173

249.9
—
416

109.2
—
182

262.5
—
437

—
83.1
—

—
200
—

57.3
—
95.3

137.4
—
229

—
44.1
—

—
106.2
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

2
2
2

5
7.5
7.5

—
260
—

—
624
—

—
273
—

—
656
—

138
—
208

333
—
500

—
143
—

—
344
—

73.6
—
110

177
—
266

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




I

I

I

K

K

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Buck-Boost Transformers

9-82

November 2003

Three-Phase

Vol. 1, Ref. No. [0382]

Table 9-94. Three-Phase Wye Connection 208 Volt Output Required, 60 Hz
Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with 3-wire input. 4-wire output requires
4-wire wye input.
Units
Unit
Required 
 kVA

Input Available Voltage
152

164

Output

9

173

Output

180

Output

Style
Number

184

Output

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

3
3
3

.05
.05
.10

—

—
1.15
—

—

.75
—
1.50

2.08
—
4.17

.98

—

—
1.56
—

—

—

—

—
2.71
—

—
1.12
—

—
3.12
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

3
3
3

.10
.15
.15

.82
—
1.24

2.29
—
3.44

1.12
—
1.69

3.12
—
4.69

—
2.25
—

—
6.25
—

1.95
—
2.92

5.41
—
8.12

2.25
—
3.73

6.25
—
9.37

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

3
3
3

.25
.25
.50

—
2.06
—

—
5.73
—

—
2.81
—

—
7.81
—

3.75
—
7.5

10.4
—
20.8

—
4.87
—

—
13.5
—

—
5.62
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

3
3
3

.50
.75
.75

4.12
—
6.19

11.5
—
17.2

5.62
—
8.44

15.6
—
23.4

—
11.2
—

—
31.2
—

9.75
—
14.6

27.1
—
40.6

11.2
—
16.8

31.2
—
46.8

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

.41

.56

3
3
3

1
1
1.5

—
8.25
—

—
22.9
—

—
11.2
—

—
31.2
—

15
—
22.5

41.7
—
62.5

—
19.5
—

—
54.1
—

—
22.5
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

3
3
3

1.5
2
2

12.4
—
16.5

34.4
—
45.8

16.9
—
22.5

46.9
—
62.5

—
30
—

—
83.3
—

29.2
—
39

81.2
—
108

33.7
—
45

93.7
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

3
3
3

3
3
5

—
24.7
—

—
68.7
—

—
33.6
—

—
93.6
—

45
—
75

125
—
208

—
58.5
—

—
162.3
—

—
67.5
—

—
187.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

3
3
3

5
7.5
7.5

41.2
—
61.9

115
—
172

56.2
—
84.4

156
—
234

—
112
—

—
312
—

97.5
—
146

271
—
406

112
—
168

312
—
468

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

P

Unit
Units
Required 
 kVA

189

N

N

O

M

236

250

264

Input Available Voltage
229

Output

Output

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

3
3
3

.05
.05
.10

1.5
—
3.0

4.16
—
8.33

1.65
—
3.3

4.58
—
9.17

—
1.27
—

—
3.54
—

.9
—
1.8

2.5
—
5.0

—
.71
—

—
1.98
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

3
3
3

.10
.15
.15

—
4.5
—

—
12.5
—

—
4.95
—

—
13.7
—

2.55
—
3.82

7.08
—
10.6

—
2.7
—

—
7.5
—

1.42
—
2.14

3.95
—
5.93

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

3
3
3

.25
.25
.50

7.5
—
15

20.8
—
41.6

8.25
—
16.5

22.9
—
45.8

—
6.35
—

—
17.7
—

4.5
—
9

12.5
—
25

—
3.56
—

—
9.88
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

3
3
3

.50
.75
.75

—
22.5
—

—
62.4
—

—
24.7
—

—
68.7
—

12.7
—
19

35.4
—
53.1

—
13.5
—

—
37.5
—

7.12
—
10.7

19.3
—
29.3

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

3
3
3

1
1
1.5

30
—
45

83.3
—
125

33
—
49.5

91.7
—
137

—
25.5
—

—
70.8
—

18
—
27

50
—
75

—
14.2
—

—
39.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

3
3
3

1.5
2
2

—
60
—

—
167
—

—
66
—

—
183
—

38.2
—
51

106
—
142

—
361
—

—
100
—

21.4
—
28.5

59.3
—
79.2

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

3
3
3

3
3
5

90
—
150

249.9
—
416

99
—
165

275.1
—
458

—
76.5
—

—
212.4
—

54
—
90

150
—
250

—
46.2
—

—
118.5
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

3
3
3

5
7.5
7.5

—
225
—

—
624
—

—
274
—

—
687
—

127
—
190

354
—
531

—
135
—

—
375
—

71.2
—
107

198
—
293

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




M

M

M

N

N

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Buck-Boost Transformers

9-83

November 2003

Three-Phase

Vol. 1, Ref. No. [0383]

Table 9-95. Three-Phase Wye Connection 230 Volt Output Required, 60 Hz
Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with 3-wire input. 4-wire output requires
4-wire wye input.
Units
Unit
Required 
 kVA

Input Available Voltage
183

192

Output

199

Output

208

Output

Style
Number

218

Output

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

3
3
3

.05
.05
.10

—

—
1.56
—

.83
—
1.66

2.08
—
4.17

—
.54

—

—

—
1.35
—

1.65
—
3.3

4.58
—
9.17

1.66
—
3.32

4.17
—
8.35

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

3
3
3

.10
.15
.15

1.25
—
1.87

3.12
—
4.69

—
2.49
—

—
6.25
—

1.08
—
1.62

2.71
—
4.06

—
4.95
—

—
13.7
—

—
4.98
—

—
12.5
—

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

3
3
3

.25
.25
.50

—
3.11
—

—
7.81
—

4.15
—
8.3

10.4
—
20.8

—
2.70
—

—
6.77
—

8.2
—
16.5

22.9
—
45.8

8.3
—
16.6

20.9
—
41.7

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

3
3
3

.50
.75
.75

6.22
—
9.33

15.6
—
23.4

—
12.4
—

—
31.2
—

5.39
—
8.09

13.5
—
20.3

—
24.7
—

—
68.8
—

—
24.9
—

—
62.6
—

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

.62

3
3
3

1
1
1.5

—
12.5
—

—
31.2
—

16.6
—
24.9

41.7
—
62.5

—
10.8
—

—
27.1
—

33
—
49.5

91.7
—
137

33.2
—
49.8

83.5
—
125

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

3
3
3

1.5
2
2

18.7
—
24.9

46.9
—
62.5

—
33.2
—

—
83.3
—

16.2
—
21.6

40.6
—
54.2

—
66
—

—
183
—

—
66.4
—

—
167
—

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

3
3
3

3
3
5

—
37.5
—

—
93.6
—

49.8
—
83

125.1
—
208

—
32.4
—

—
81.3
—

99
—
165

275
—
458

99.6
—
166

250.5
—
417

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

3
3
3

5
7.5
7.5

62.2
—
93.3

156
—
234

—
124
—

—
312
—

53.9
—
80.9

135
—
203

—
247
—

—
688
—

—
249
—

—
626
—

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

N

Unit
Units
Required 
 kVA

Input Available Voltage

N

242

245

Output

Output

S

M

Q

253

260

265

Output

Output

Style
Number

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

3
3
3

.05
.05
.10

1.74
—
3.48

4.37
—
8.75

—
1.33
—

—
3.33
—

.91
—
1.83

2.29
—
4.58

—

.62

—

—
1.77
—

—

.70

—

—
1.56
—

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

3
3
3

.10
.15
.15

—
5.23
—

—
13.1
—

2.65
—
3.98

6.67
—
10.0

—
2.74
—

—
6.87
—

1.41
—
2.12

3.54
—
5.31

1.25
—
1.87

3.12
—
4.69

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

3
3
3

.25
.25
.50

8.71
—
17.4

21.9
—
43.7

—
6.63
—

—
16.7
—

4.56
—
9.31

11.5
—
22.9

—
3.52
—

—
8.85
—

—
3.11
—

—
7.81
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

3
3
3

.50
.75
.75

—
26.1
—

—
65.6
—

13.3
—
19.9

33.3
—
50

—
13.7
—

—
34.4
—

7.05
—
10.6

17.7
—
26.6

6.22
—
9.33

15.6
—
23.4

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

3
3
3

1
1
1.5

34.8
—
52.3

87.5
—
131

—
26.5
—

—
66.7
—

18.3
—
27.4

45.8
—
68.7

—
14.1
—

—
35.4
—

—
12.5
—

—
31.2
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

3
3
3

1.5
2
2

—
69.7
—

—
175
—

39.8
—
53.1

100
—
133

—
36.6
—

—
91.6
—

21.2
—
28.2

53.1
—
70.8

18.7
—
24.9

46.9
—
62.5

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

3
3
3

3
3
5

104.4
—
174

262.5
—
437

—
79.5
—

—
200
—

54.9
—
91.3

137.4
—
229

—
42.3
—

—
106.2
—

—
37.5
—

—
93.6
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

3
3
3

5
7.5
7.5

—
261
—

—
656
—

133
—
199

333
—
500

—
137
—

—
344
—

70.5
—
106

177
—
266

62.2
—
93.3

156
—
234

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




Q

Q

R

R

S

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Buck-Boost Transformers

9-84

November 2003

Three-Phase

Vol. 1, Ref. No. [0384]

Table 9-96. Three-Phase Wye Connection 240 Volt Output Required, 60 Hz
Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with 3-wire input. 4-wire output requires
4-wire wye input.
Units
Unit
Required 
 kVA

Input Available Voltage
190

200

Output

9

208

Output

218

Output

Style
Number

228

Output

Price
U.S. $

Output

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

kVA

Amps

3
3
3

.05
.05
.10

—
.65
—

—
1.65
—

.86
—
1.73

2.08
—
4.17

—
1.27
—

—
3.05
—

.86
—
1.73

2.08
—
4.17

1.73
—
3.46

4.17
—
8.34

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

3
3
3

.10
.15
.15

1.3
—
1.95

3.12
—
4.69

—
2.59
—

—
6.25
—

2.55
—
3.82

6.12
—
9.16

—
2.59
—

—
6.25
—

—
5.20
—

—
12.5
—

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

3
3
3

.25
.25
.50

—
3.25
—

—
7.81
—

4.32
—
8.65

10.4
—
20.8

—
6.3
—

—
15.1
—

4.32
—
8.65

10.4
—
20.8

8.66
—
17.3

20.9
—
41.7

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

3
3
3

.50
.75
.75

6.5
—
9.75

15.6
—
23.4

—
13
—

—
31.2
—

12.7
—
19.2

30.4
—
46

—
13
—

—
31.2
—

—
26
—

—
62.6
—

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

3
3
3

1
1
1.5

—
13
—

—
31.2
—

17.3
—
25.9

41.7
—
62.5

—
25.5
—

—
61.2
—

17.3
—
25.9

41.7
—
62.5

34.6
—
52

83.4
—
125

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

3
3
3

1.5
2
2

19.5
—
26

46.9
—
62.5

—
34.6
—

—
83.3
—

38.2
—
51

91.6
—
122.4

—
34.6
—

—
83.3
—

—
69.3
—

—
167
—

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

3
3
3

3
3
5

—
39
—

—
93.6
—

51.9
—
86.5

125.1
—
208

—
76.5
—

—
183.6
—

51.9
—
86.5

125.1
—
208

103.8
—
173

250.2
—
417

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

3
3
3

5
7.5
7.5

65
—
97.5

156
—
234

—
130
—

—
312
—

127.2
—
192

305.2
—
460

—
130
—

—
312
—

—
260
—

—
626
—

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 

N

Unit
Units
Required 
 kVA

252

N

M

R

Q

264

272

277

Input Available Voltage
256

Output

Output

Output

kVA

Amps

kVA

Amps

kVA

Output

Style
Number

Price
U.S. $

Output

Amps

kVA

Amps

kVA

Amps

—

—

.74

.65

S10N04A81N
S10N06A81N
S10N04A82N

100.
100.
105.

3
3
3

.05
.05
.10

1.85
—
3.64

4.37
—
8.75

—
1.39
—

—
3.33
—

—
1.91

2.29
—
4.58

—

—
1.77
—

—

—
1.56
—

3
3
3

.10
.15
.15

—
5.46
—

—
13.1
—

2.77
—
4.16

6.67
—
10.0

—
2.86
—

—
6.87
—

1.47
—
2.21

3.54
—
5.31

1.3
—
1.95

3.12
—
4.69

S10N06A82N
S10N04A83N
S10N06A83N

105.
115.
115.

3
3
3

.25
.25
.50

9.09
—
18.2

21.9
—
43.7

—
6.93
—

—
16.7
—

4.76
—
9.53

11.5
—
22.9

—
3.68
—

—
8.85
—

—
3.25
—

—
7.81
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

3
3
3

.50
.75
.75

—
27.3
—

—
65.6
—

13.9
—
20.8

33.3
—
50

—
14.3
—

—
34.4
—

7.36
—
11

17.7
—
26.6

6.5
—
9.75

15.6
—
23.4

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

.95

3
3
3

1
1
1.5

36.4
—
54.6

87.5
—
131

—
27.7
—

—
66.7
—

19.1
—
28.6

45.8
—
68.7

—
14.7
—

—
35.4
—

—
13
—

—
31.2
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

3
3
3

1.5
2
2

—
72.8
—

—
175
—

41.6
—
55.4

100
—
133

—
38.1
—

—
91.7
—

22.1
—
29.5

53.1
—
70.8

19.5
—
26

46.9
—
62.5

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

3
3
3

3
3
5

109.2
—
182

262.5
—
437

—
83.1
—

—
200
—

57.3
—
95.3

137.4
—
229

—
44.1
—

—
106.2
—

—
39
—

—
93.6
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

3
3
3

5
7.5
7.5

—
273
—

—
656
—

139
—
208

333
—
500

—
143
—

—
344
—

73.6
—
110

177
—
266

65
—
97.5

156
—
234

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection Diagram 




Q

Q

R

R

S

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Buck-Boost Transformers

9-85

November 2003

Three-Phase

Vol. 1, Ref. No. [0385]

Table 9-97. Three-Phase Wye Connection 460 Volt Output Required, 60 Hz
Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with 3-wire input. 4-wire output requires
4-wire wye input.
Units
Unit Input Available Voltage
Required 
 kVA 406
418
Output
kVA

Output
Amps kVA

432
Output

Amps kVA

438

424

Output
Amps kVA

436

Output
Amps kVA

Style
Number

450

Output

Price
U.S. $

Output

Amps kVA

Amps kVA

Amps

3
3
3

.05
.05
.10

—
—
1.66
2.08 —
—
3.22
4.04 —
1.25
1.57 —
—
2.49
3.12 —
—
1.3
—
—
3.31
4.15 —
—
6.62
8.31 —

1.7
2.1
1.56 —
—
3.5

—
—
4.2

—
2.6
—

—
S10N04A81N
3.13 S10N06A81N
—
S10N04A82N

100.
100.
105.

3
3
3

.10
.15
.15

2.49
3.12 —
—
4.97
6.24 —
—
2.6
—
—
4.97
6.24 —
—
9.94 12.48 —
3.73
4.68 —
—
7.46
9.36 —
—
3.9

3.12 —
—
5.2
4.68 —

—
5.2
6.25 —
—
7.8

6.25 S10N06A82N
—
S10N04A83N
9.38 S10N06A83N

105.
115.
115.

3
3
3

.25
.25
.50

—
—
8.28 10.39 —
6.22
7.81 —
—
12.4
—
—
16.6
20.84 —

3
3
3

.50
.75
.75

12.5
—
18.7

—
16.6
15.56 —
—
33.2

20.84 —
—
6.5
41.67 —

—
8.7
7.82 —
—
17.4

10.4
—
20.9

—
13
—

—
15.6
—

S10N04A26N
S10N06A26N
S10N04A51N

150.
150.
175.

15.69 —
—
24.8
23.47 —

—
24.69 31.25 —
31.12 —
—
49.6
—
37.3
46.82 —

—
13
62.25 —
—
19.5

15.6
—
23.4

—
26
—

—
31.2
—

26
—
39

31.2
—
46.9

S10N06A51N
S10N04A76N
S10N06A76N

175.
230.
230.

3
3
3

1
1
1.5

—
24.9
—

—
33.1
31.25 —
—
49.7

41.54 —
—
49.7
62.38 —

—
66.2
62.38 —
—
99.4

83.09 —
—
26
124.75 —

—
31.2
—

35
—
52

42
—
62.5

—
52
—

—
62.5
—

S10N04A01N
S10N06A01N
S10N04A16N

270.
270.
360.

3
3
3

1.5
2
2

37.3
—
49.7

46.94 —
—
66.3
62.38 —

—
74.6
83.22 —
—
99.5

93.63 —
—
133
124.88 —

—
39
166.93 —
—
52

46.8
—
62.5

—
69
—

—
82.9
—

78
—
104

93.8
—
125

S10N06A16N
S10N04A02N
S10N06A02N

360.
470.
470.

3
3
3

3
3
5

—
74.6
—

—
99.3
93.63 —
—
166

124.64 —
—
149
208.35 —

—
198.6
187.01 —
—
322

249.27 —
—
78
404.16 —

—
93.8
—

104
—
174

125
—
209.2

—
156
—

—
187.6
—

S10N04A03N
S10N06A03N
S10N04A05N

635.
635.
1,180.

3
3
3

5
7.5
7.5

125
—
187

156.89 —
—
248
235
—

—
311
—

312.53 —
—
496
468
—

—
622
—

156.3
—
234

—
260
—

—
312
—

260
—
390

312.7
—
469

S10N06A05N
S10N04A07N
S10N06A07N

1,180.
1,650.
1,650.

Connection
Diagram 




R

R

249
—
373
Q

Q

130
—
195
R

R

Q

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Buck-Boost Transformers

9-86

November 2003

Single-Phase

Vol. 1, Ref. No. [0386]

Table 9-98. Single-Phase Required, 60 Hz
Units
Unit
Required 
 kVA

Input Available Voltage/Output Voltage
200/240

230/277

Output
kVA
1
1
1

9

.25
.50
.75

346/380

Output
Amps

kVA

362/380

Output
Amps

kVA

378/416

Output
Amps

kVA

Output
Amps

kVA

Style
Number

416/457

Price
U.S. $

Output
Amps

kVA

Amps

1.25
2.50
3.75

5.2
10.4
15.6

1.44
2.88
4.32

5.2
10.4
15.6

1.98
3.95
5.93

5.2
10.4
15.6

3.95
7.90
11.9

10.4
20.8
31.2

2.16
4.33
6.49

5.2
10.4
15.6

2.38
4.76
7.14

5.2
10.4
15.6

S20N08A26N
S20N08A51N
S20N08A76N

165.
210.
270.

1
1
1

1
1.5
2

5.00
7.50
10.00

20.8
31.2
41.6

5.76
8.64
11.5

20.8
31.2
41.6

7.90
11.9
15.8

20.8
31.2
41.6

15.8
23.8
31.6

41.6
62.5
83.3

8.65
13.0
17.3

20.8
31.2
41.6

9.52
14.3
19.0

20.8
31.2
41.6

S20N08A01N
S20N08A16N
S20N08A02N

310.
420.
570.

1
1
1

3
5
7.5

15.0
25.0
37.5

62.5
104.0
156.0

17.3
28.8
43.2

62.5
104.0
156.0

23.8
39.5
59.3

62.5
104.0
156.0

47.5
79.0
118.6

125.0
208.0
312.0

26.0
43.3
64.9

62.5
104.0
156.0

28.6
47.6
71.4

62.5
104.0
156.0

S20N08A03N
S20N08A05N
S20N08A07N

740.
1,290.
2,000.

Connection
Diagram 

B

B

Units
Unit
Required 
 kVA

Input Available Voltage/Output Voltage
436/480

458/480

Output
kVA
1
1
1

.25
.50
.75

F

277/230

Output
Amps

kVA

Output
Amps

kVA

E

F

F

480/456

504/480

528/480

Output
Amps

kVA

Output
Amps

kVA

Style
Number

Price
U.S. $

Output
Amps

2.50
4.99
7.49

5.2
10.4
15.6

4.99
9.98
15.0

10.4
20.8
31.2

1.44
2.88
4.33

6.26
12.5
18.8

5.23
10.4
15.7

11.4
22.8
34.2

5.47
10.9
16.4

11.4
22.8
34.2

kVA
2.75
5.49
8.24

Amps
5.72
11.4
17.2

S20N08A26N
S20N08A51N
S20N08A76N

165.
210.
270.

1
1
1

1
1.5
2

9.98
15.0
20.0

20.8
31.2
41.6

20.0
30.0
40.0

41.6
62.5
83.3

5.76
8.64
11.5

25.0
37.6
50.1

20.9
31.3
41.8

45.6
68.4
91.2

21.8
32.8
43.7

45.6
68.4
91.2

11.0
16.5
22.0

22.9
34.3
45.8

S20N08A01N
S20N08A16N
S20N08A02N

310.
420.
570.

1
1
1

3
5
7.5

30.0
49.9
74.9

62.5
104.0
156.0

60.0
99.8
149.8

125.0
208.0
312.0

17.3
28.8
43.2

75.3
125.3
187.9

62.7
104.5
156.8

136.0
227.0
341.0

65.2
108.0
163.0

136.0
227.0
341.0

33.0
54.9
82.4

68.8
114.4
171.6

S20N08A03N
S20N08A05N
S20N08A07N

740.
1,290.
2,000.

Connection
Diagram 




F

E

B

E

E

F

Additional wiring trough may be required.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Buck-Boost Transformers

9-87

November 2003

Three-Phase

Vol. 1, Ref. No. [0387]

Table 9-99. Three-Phase Required, 60 Hz
Unit
kVA

Input Available Voltage/Output Voltage
362/380

346/416

Output
kVA
.25
.50
.75

430/473

Output
Amps

kVA

400/480

Output
Amps

kVA

Output
Amps

kVA

Style
Number

436/480

Price
U.S. $

Output
Amps

kVA

Amps

6.52
13.0
19.6

10.4
20.8
31.2

3.75
7.50
11.2

5.2
10.4
15.6

4.26
8.52
12.8

5.2
10.4
15.6

4.33
8.65
13.0

5.2
10.4
15.6

4.33
8.65
13.0

5.2
10.4
15.6

S20N08A26N
S20N08A51N
S20N08A76N

165.
210.
270.

1
1.5
2

26.1
39.1
52.2

41.6
62.4
83.2

15.0
22.5
30.0

20.8
31.2
41.6

17.0
25.5
34.1

20.8
31.2
41.6

17.3
26.0
34.6

20.8
31.2
41.6

17.3
26.0
34.6

20.8
31.2
41.6

S20N08A01N
S20N08A16N
S20N08A02N

310.
420.
570.

3
5
7.5

78.4
130.4
195.6

125.0
208.0
312.0

45.0
75.1
112.6

62.5
104.0
156.0

51.2
85.2
127.8

62.5
104.0
156.0

52.0
86.6
129.9

62.5
104.0
156.0

52.0
86.6
129.9

62.5
104.0
156.0

S20N08A03N
S20N08A05N
S20N08A07N

740.
1,290.
2,000.

Connection Diagram 


I

N

K

N

K

Units Required 

2

3

2

3

2

Unit
kVA

460/483

Input Available Voltage/Output Voltage
457/380

Output
kVA
.25
.50
.75

504/480

Output
Amps

kVA

Output
Amps

kVA

Style
Number

528/480

Price
U.S. $

Output
Amps

kVA

Amps

8.7
17.4
26.1

10.4
20.8
31.2

4.12
8.23
12.3

6.25
12.5
18.8

9.08
18.2
27.2

10.9
21.8
32.8

4.76
9.51
14.3

5.72
11.4
17.2

S20N08A26N
S20N08A51N
S20N08A76N

165.
210.
270.

1
1.5
2

34.8
52.2
69.6

41.6
62.4
83.2

16.5
24.7
32.9

25.0
37.5
50.0

36.3
54.5
72.6

43.7
65.5
87.4

19.0
28.5
38.0

22.9
34.3
45.8

S20N08A01N
S20N08A16N
S20N08A02N

310.
420.
570.

3
5
7.5

104.6
174.0
261.0

125.0
208.0
312.0

49.5
82.3
123.5

75.2
125.1
187.6

109.7
181.6
272.4

131.3
218.4
327.6

57.2
95.1
142.7

68.8
114.4
171.6

S20N08A03N
S20N08A05N
S20N08A07N

740.
1,290.
2,000.

Connection Diagram 


I

N

I

K

Units Required 

2

3

2

2





Refer to Page 9-74 for Buck-Boost wiring diagrams.
Additional wiring trough may be required.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com






9

Transformers
Buck-Boost Transformers

9-88

November 2003

Autotransformer Applications

Vol. 1, Ref. No. [0388]

Table 9-100. Three-Phase Open Delta Connection 480 Volt Output
Required, 60 Hz
Units
Input Available Voltage
Required 600
575


Output
kVA

9

Output

Style
Number 

575

Table 9-101. Single-Phase 480 Volt Output Required, 60 Hz
Price
U.S.

kVA

Amps kVA Amps kVA Amps

4.3
5.1
—
—
6.5
7.8

—
—
—

—
—
—

—
—
4.1 4.9
—
—

S20N11S51N
S60G11S51N
S20N11S76N

170.
255.
220.

2
2
2

—
—
8.6 10.3
—
—

—
—
—

—
—
—

6.2 7.4
—
—
8.3 9.9

S60G11S76N
S20N11S01N
S60G11S01N

330.
260.
390.

2
2
2

13.0 15.6
—
—
17.2 20.6

—
—
—

—
—
—

—
—
12.4 14.9
—
—

S20N11S16N
S60G11S16N
S20N11S02N

320.
475.
410.

2
2
2

—
—
25.8 31
—
—

—
—
—

—
—
—

16.5 19.8
—
—
24.8 29.8

S60G11S02N
S20N11S03N
S60G11S03N

610.
500.
740.

2
2
2

43.2 51.9
—
—
65
78.1

—
—
—

—
—
—

—
41
—

—
49.3
—

S20N11S05N
S60G11S05N
S20N11S07N

740.
1,110.
980.

2
2
2

—
86
—

—
103.4
—

—
—
83

—
—
99.8

62
—
—

74.5
—
—

S60G11S07N
S20N11S10N
S60G11S10N

1,460.
1,180.
1,760.

2
2
2

130
—
216

156.3
—
259.8

—
124
—

—
149.1
—

—
—
—

—
—
—

S20N11S15N
S60N11S15N
T20P11S25

1,540.
2,400.
1,870.

2
2
2

—
324
432

—
389.7
519.6

207
—
—

248.9
—
—

—
—
—

—
—
—

S60J11S25N
T20P11S37
T20P11S50

2,825.
2,290.
3,220.

Connection
Diagram

I

T




Output

Style
Number 

575

Price
U.S.

Output

Amps kVA Amps kVA Amps

1
1
1

2.5
5.2
—
—
3.7
7.7

—
—
—

—
—
—

—
—
2.4 5
—
—

S20N11S51N
S60G11S51N
S20N11S76N

170.
255.
220.

1
1
1

—
—
5.0 10.4
—
—

—
—
—

—
—
—

3.6 7.5
—
—
4.8 10

S60G11S76N
S20N11S01N
S60G11S01N

330.
260.
390.

1
1
1

7.5 15.6
—
—
10
20.8

—
—
—

—
—
—

—
—
7.2 15
—
—

S20N11S16N
S60G11S16N
S20N11S02N

320.
475.
410.

1
1
1

—
15
—

—
31.2
—

—
—
—

—
—
—

9.6 20
—
—
14.3 29.7

S60G11S02N
S20N11S03N
S60G11S03N

610.
500.
740.

1
1
1

25
52
—
—
37.5 78.1

—
—
—

—
—
—

—
24
—

—
50
—

S20N11S05N
S60G11S05N
S20N11S07N

740.
1,110.
980.

1
1
1

—
50
—

—
104.1
—

—
—
43

—
—
100

36
—
—

75
—
—

S60G11S07N
S20N11S10N
S60G11S10N

1,460.
1,180.
1,760.

1
1
1

75
—
125

156.2
—
260.4

—
72
—

—
150
—

—
—
—

—
—
—

S20N11S15N
S60N11S15N
T20P11S25

1,540.
2,400.
1,870.

1
1
1

—
187
250

—
389.6
520.8

120
—
—

250
—
—

—
—
—

—
—
—

S60J11S25N
T20P11S37
T20P11S50

2,825.
2,290.
3,220.

Connection
Diagram

E

H

U








Output

Output

2
2
2

J

Units
Input Available Voltage
Required 600
575




Additional wiring trough may be required.
On transformers supplied with standard taps, taps must be placed at
nominal settings.
Refer to Page 9-74 for Buck-Boost wiring diagrams.




Additional wiring trough may be required.
On transformers supplied with standard taps, taps must be placed at
nominal settings.
Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Autotransformers can be used only where local electric codes
permit and isolation of the two circuits is not required.

Rated Output Voltage
Note: Output voltage for lower input voltage can be found by: -------------------------------------------------- x Input Actual Voltage = Output New Voltage.
Rated Input Voltage
Actual Input Voltage
Note: Output kVA available at reduced input voltage can be found by: ------------------------------------------------ x Output kVA = New kVA Rating.
Rated Input Voltage

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1






For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-89

November 2003

Type MTA

Vol. 1, Ref. No. [0389]

Type MTA

Features, Benefits
and Functions

Product Specifications

■

Cutler-Hammer Type MTA control
transformers are designed for 60 Hertz
operation. Transformers required for
other frequencies are available and
must be specifically designed.

■
■
■
■
■
■

Type MTA Transformer

■

Product Description
■

Varnish impregnated core and
coil design.
■ Suitable for indoor applications.
■ Open core and coil design.

Application Description
Machine Tool and Industrial Control
Transformers provide stepped-down
voltages to machine tool control
devices enabling control circuits to
be isolated from all power and lighting
circuits. This allows the use of grounded or ungrounded circuits that are
independent of the power or lighting
grounds; greater safety is afforded the
operator. The control transformer line
is particularly adaptable on applications where compact construction
is demanded.

■

UL recognized component for units
rated 1000 VA and below.
CSA certified for units rated 1000 VA
and below.
55ºC rise, 105ºC insulation system.
60 Hz operation standard.
100% tested to verify product quality.
Performance equals or exceeds
requirements of ANSI/NEMA ST-1.
Regulation exceeds ANSI/NEMA
requirements for all ratings.
Each unit must pass rigid tests for
turns ratio, insulation, continuity,
and over potential.
50 – 5000 VA ratings.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards.

Frequency

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-102. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Series-Multiple Windings
Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or 240
with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
Industrial Control Transformers

9-90

November 2003

Type MTA

Vol. 1, Ref. No. [0390]

Overcurrent Protection Tables
Overcurrent protection on both the primary and secondary sides of transformers are specified in UL 508 and the National
Electrical Code. The maximum acceptable ratings are shown below. Due to high inrush currents present when a transformer
is initially energized, it is recommended that the primary fuse be time delay to prevent nuisance trips during startup.
Table 9-103. Maximum Acceptable Rating of Primary Overcurrent Protection
Primary VA Rating
Voltage 25
50

9

75

100

150

200

250

300

350

500

750

1000

1500

2000

3000

5000

7000

115

6/10
(1)

1-1/4
(2)

1-8/10 2-1/2
(3-2/10) (4)

3-1/2
(6-1/4)

5
(8)

4

5

5

8

10

15

20

25

—

—

—

120

6/10
(1)

1-1/4
(2)

1-8/10
(3)

3-1/2
(6-1/4)

5
(8)

4

5

5

8

10

15

15

20

—

—

—

200

3/10
(6/10)

3/4
(1-1/4)

1-1/8
1-1/2
(1-8/10) (2-1/2)

2-1/4
(3-1/2)

3
(5)

3-1/2
(6-1/4)

4-1/2
(7-1/2)

5
(8)

4-1/2

7

9

15

15

20

—

—

208

3/10
(6/10)

6/10
(1-1/8)

1
1-4/10
(1-8/10) (2-1/4)

2
(3-1/2)

2-8/10
(4-1/2)

3-1/2
(6)

4
(7)

5
(8)

4

6

8

12

15

20

30

—

220

3/10
(1/2)

6/10
(1-1/8)

1
1-1/4
(1-6/10) (2-1/4)

2
2-1/2
(3-2/10) (4-1/2)

3-2/10 4
(5-6/10) (6-1/4)

4-1/2
(7-1/2)

4

6

8

12

15

20

30

—

230

3/10
(1/2)

6/10
(1)

8/10
1-1/4
(1-6/10) (2)

1-8/10 2-1/2
(3-2/10) (4)

3-2/10
(5)

3-1/2
(6-1/4)

4-1/2
(7-1/2)

4

6

8

10

15

20

30

—

240

3/10
(1/2)

6/10
(1)

8/10
(1-1/2)

1-1/4
(2)

1-8/10
(3)

2-1/4
(4)

3
(5)

3-1/2
(6-1/4)

4
(7)

3-1/2

5

7

10

15

20

30

—

277

1/4
(4/10)

1/2
(8/10)

8/10
(1-1/4)

1
1-6/10
(1-8/10) (2-1/2)

2
(3-1/2)

2-1/2
(4-1/2)

3-2/10
(5)

3-1/2
(6-1/4)

5
(9)

5

6

9

12

15

25

—

380

3/16
(3/10)

3/10
(6/10)

1/2
(8/10)

3/4
(1-1/4)

1-1/8
1-1/2
(1-8/10) (2-1/2)

1-8/10 2-1/4
(3-2/10) (3-1/2)

2-1/2
(4-1/2)

3-1/2
(6-1/4)

5-6/10
(9)

4-1/2

6-1/4

9

15

20

25

400

3/16
(3/10)

3/10
(6/10)

1/2
(8/10)

3/4
(1-1/4)

1-1/8
1-1/2
(1-8/10) (2-1/2)

1-8/10
(3)

2-1/4
(3-1/2)

2-1/2
(4)

3-1/2
(6-1/4)

5-6/10
(9)

4-1/2

6-1/4

9

12

15

20

416

15/100 3/10
(3/10) (6/10)

1/2
(8/10)

6/10
(1-1/8)

1
1-4/10
(1-8/10) (2-1/4)

1-8/10
(3)

2
(3-1/2)

2-1/2
(4)

3-1/2
(6)

5
(9)

4

6

8

12

15

20

440

15/100 3/10
(1/4)
(1/2)

1/2
(8/10)

6/10
(1-1/8)

1
1-1/4
(1-6/10) (2-1/4)

1-6/10 2
2-1/4
(2-8/10) (3-2/10) (3-1/2)

3-2/10
(5)

5
(8)

4

6

8

12

15

20

460

15/100 3/10
(1/4)
(1/2)

4/10
(8/10)

6/10
(1)

8/10
(1-1/2)

1-1/4
(2)

1-6/10
(2-1/2)

1-8/10 2-1/4
3-2/10
(3-2/10) (3-2/10) (5)

4-1/2
(8)

3-1/2

6

8

12

15

20

480

15/100 3/10
(1/4)
(1/2)

4/10
(3/4)

6/10
(1)

8/10
(1-1/2)

1-1/4
(2)

1-1/2
(2-1/2)

1-8/10
(3)

2
(3-1/2)

3
(5)

4-1/2
(7-1/2)

3-1/2

5

7

10

15

20

550

1/8
(2/10)

1/4
(4/10)

4/10
(6/10)

1/2
(8/10)

8/10
(1-1/4)

1
1-1/4
(1-8/10) (2-1/4)

1-6/10
(2-1/2)

1-8/10
(3)

2-1/2
(4-1/2)

4
(6-1/4)

5

4-1/2

6

9

15

15

575

1/8
(2/10)

1/4
(4/10)

3/10
(6/10)

1/2
(8/10)

3/4
(1-1/4)

1
1-1/4
(1-6/10) (2)

1-1/2
(2-1/2)

1-8/10
(3)

2-1/2
(4)

3
(6-1/4)

5

4-1/2

6

9

15

15

600

1/8
(2/10)

2/10
(4/10)

3/10
(6/10)

1/2
(8/10)

3/4
(1-1/4)

8/10
1-1/4
(1-6/10) (2)

1-1/2
(2-1/2)

1-6/10 2-1/4
(2-8/10) (4)

3-1/2
(6-1/4)

5

4

6

9

15

15

2-1/4
(4)

Note: If the rated primary current is less than 2 amperes, the maximum rating of the overcurrent device is 300% for power circuits, shown
above, or 500% for control circuits, shown above (in brackets). If the rated primary current is 2 amperes or more, the maximum rating of the
overcurrent device is 250%. All figures assume secondary overcurrent protection per NEC/UL.
References: NEC 430-72 (c) exception 2, 450-3 (b) 1 & 2, UL 508 32.7, UL 845 11.16 and 11.17.

Table 9-104. Maximum Acceptable Rating of Secondary Overcurrent Protection
Secondary VA Rating
Voltage
25
50
12
24

75

100

150

200

250

300

350

500

750

1000

1500

2000

3000

5000

3-1/2
1-6/10

7
3-2/10

10
5

15
6-1/4

20
10

30
12

—
15

—
20

—
20

—
30

—
—

—
—

—
—

—
—

—
—

—
—

90
95
100

4/10
4/10
4/10

8/10
8/10
8/10

1-1/4
1-1/4
1-1/4

1-8/10
1-6/10
1-6/10

2-1/2
2-1/2
2-1/2

3-1/2
3-1/2
3-2/10

4-1/2
4
4

5
5
5

6-1/4
6
5-6/10

9
8
8

12
12
12

15
15
15

30
20
20

30
30
30

—
—
—

—
—
—

110
115
120

3/10
3/10
3/10

3/4
6/10
6/10

1-1/8
1
1

1-1/2
1-4/10
1-1/4

2-1/4
2
2

3
2-8/10
2-1/2

3-1/2
3-1/2
3-2/10

4-1/2
4
4

5
5
4-1/2

7-1/2
7
6-1/4

10
10
10

15
15
15

20
20
20

30
30
20

—
—
—

—
—
—

220
230
240

15/100
15/100
15/100

3/10
3/10
3/10

1/2
1/2
1/2

3/4
6/10
6/10

1-1/8
1
1

1-1/2
1-4/10
1-1/4

1-8/10
1-8/10
1-6/10

2-1/4
2
2

2-1/2
2-1/2
2-1/2

3-1/2
3-1/2
3-2/10

5-6/10
5
5

7
7
7

9
8
8

15
15
12

20
20
20

30
30
30

Note: If the rated secondary current is less than 9 amperes, the maximum rating of the overcurrent device is 167%; 9 amperes or more, the maximum
rating of the overcurrent device is 125%. If 125% does not correspond to a standard fuse rating, the next highest standard rating may be used.
References: NEC 430-72 (c) exception 2, 450-3 (b) 1 & 2, UL 508 32.7, UL 845 11.16 and 11.17.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-91

November 2003

Types MTA, MTC and AP

Vol. 1, Ref. No. [0391]

Wiring Diagrams
Type MTA and MTC Control Transformers
Table 9-107. Wiring for Diagram 3

Table 9-105. Wiring for Diagram 1
Volts

Connect

Lines

A

B

460
230

—
—

H2 to H3
H1 to H3 and H2 to H4

115

—

—

H1

H3

H2

Type AP Control Transformers
Volts

Connect

Table 9-109. Wiring for Diagram 5
Lines

A

B

H1-H4
H1-H4

460
230

—
—

H2 to H3
H1 to H3 and H2 to H4

X1-X2

230
115

—
—

X2 to X3
X1 to X3 and X2 to X4

Volts

Connect

Lines

—
—

H2 to H3
H1 to H3 and H2 to H4

H1-H4
H1-H4

—
—

X2 to X3
X1 to X3 and X2 to X4

X1-X4
X1-X4

A

B

H1-H4
H1-H4

480
240

X1-X4
X1-X4

240
115

H4

X2

H1

H3

H2

H4

H1

H3

H2

H4

X4

X2

X3

X1

X4

X2

X3

X1

X1

Figure 9-3. Diagram 1

Figure 9-7. Diagram 5

Figure 9-5. Diagram 3
Table 9-106. Wiring for Diagram 2
Volts
A

Connect

Lines

Volts

B

575
460
230
—

416
380
—
208

H2 to H3
H2 to H3
H1 to H3 and H2 to H4
H1 to H3 and H2 to H5

H1-H5
H1-H4
H1-H4
H1-H5

115
95

115
95

—
—

X1-X3
X1-X2

H1

X3

Table 9-108. Wiring for Diagram 4

H3

H2

X2

H4

Connect

Lines

115

—

H1-H2

24

—

X1-X2

A

B

115
12

H1

H2

X2

X1

H5

X1

Figure 9-6. Diagram 4

Figure 9-4. Diagram 2

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
Industrial Control Transformers

9-92

November 2003

Type MTA

Vol. 1, Ref. No. [0392]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-110. Type MTA
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Frame

Wiring
Style
Diagram 
 Number

Price
U.S.

230/460 Volts to 115 Volts, 60 Hz
50

9

(Use Type MTC – C0050C2A)

75
100

3-3/16
3-3/16

3-3/4
3-3/4

3-3/4
4

3
4

80
80

95
95

95
102

1.4
1.8

FR1510
FR1512

1
1

C0075A2F
C0100A2F

74.00
76.50

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4-3/4
4-1/2
5

6
7
8

80
96
96

95
114
114

95
114
127

2.7
3.2
3.6

FR1520
FR1714
FR1717

1
1
1

C0150A2F
C0200A2F
C0250A2F

88.00
110.00
131.00

300
350
500

3-13/16
3-13/16
4-3/8

4-1/2
4-1/2
5-1/4

5-1/2
6
5-5/8

10
12
15

96
96
111

114
114
133

139
152
143

4.5
5.4
6.8

FR1723
FR1727
FR1923

1
1
1

C0300A2F
C0350A2F
C0500A2F

143.00
154.00
189.00

750
1000
1500

4-3/8
5-1/4
6

5-1/4
6-1/8
6-7/8

6-1/8
6-3/4
7-1/2

19
19
27

111
133
152

133
155
174

155
171
190

8.6
8.6
12.3

FR1931
FRC613
FRC614

1
1
1

C0750A2F
C1000A2F
C1500A2F

249.00
396.00
521.00

2000
3000
5000

5-7/8
6-1/2
7-5/8

6-7/8
8-3/16
8-15/16

8-1/2
8-3/4
10-1/4

36
52
79

149
165
193

174
207
227

215
222
260

16.3
23.6
35.8

FRC827
FRC828
FRC829

1
1
1

C2000A2F
C3000A2F
C5000A2F

624.00
835.00
1,320.00

230/460 Volts to 115/230 Volts, 60 Hz
50
75
100

2-19/32
3-3/16
3-3/16

3
3-3/4
3-3/4

3-1/4
3-3/4
4

2
3
4

65
80
80

76
95
95

82
95
102

.9
1.4
1.8

FR1310
FR1510
FR1512

3
3
3

C0050A2G
C0075A2G
C0100A2G

94.00
102.00
110.00

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4-3/4
4-1/2
5

6
7
8

80
96
96

95
114
114

95
114
127

2.7
3.2
3.6

FR1520
FR1714
FR1717

3
3
3

C0150A2G
C0200A2G
C0250A2G

121.00
137.00
154.00

300
350
500

3-13/16
3-13/16
4-3/8

4-1/2
4-1/2
5-1/4

6
6
6-1/4

10
12
15

96
96
111

114
114
133

152
152
158

4.5
5.4
6.8

FR1727
FR1727
FR1930

3
3
3

C0300A2G
C0350A2G
C0500A2G

165.00
177.00
210.00

750
1000
1500

5-1/4
5-1/4
6

6-1/8
6-1/8
6-7/8

6-3/4
6-3/4
7-1/2

19
19
27

133
133
152

155
155
174

171
171
190

8.6
8.6
12.3

FRC613
FRC613
FRC614

3
3
3

C0750A2G
C1000A2G
C1500A2G

269.00
409.00
542.00

2000
3000
5000

5-7/8
6-1/2
5-5/8

6-7/8
8-3/16
8-15/16

8-1/2
8-3/4
10-1/4

36
52
79

149
165
193

174
207
227

215
222
260

16.3
23.6
35.8

FRC827
FRC828
FRC829

3
3
3

C2000A2G
C3000A2G
C5000A2G

650.00
865.00
1,390.00




See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Industrial Control Transformers

9-93

November 2003

Type MTA

Vol. 1, Ref. No. [0393]

Table 9-111. Type MTA
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Frame

Wiring
Style
Diagram 
 Number

Price
U.S.

230/460/575 Volts to 115/95 Volts, 50/60 Hz
50
75
100

2-19/32
3-3/16
3-3/16

3
3-3/4
3-3/4

3-3/4
4
4 3/4

2
4
5

98
80
80

76
95
95

95
102
120

1.5
1.8
2.7

FR1314
FR1512
FR1517

2A
2A
2A

C0050A3C
C0075A3C
C0100A3C

94.
102.
110.

150
200
250

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/2
5
5-1/2

7
8
10

96
96
96

114
114
114

114
127
139

3.2
3.6
4.5

FR1714
FR1717
FR1723

2A
2A
2A

C0150A3C
C0200A3C
C0250A3C

121.
137.
169.

300
350
500

3-13/16
4-3/8
4-3/8

4-1/2
5-1/4
5-1/4

6
5-5/8
6-1/8

12
14
17

96
111
111

114
133
133

152
143
155

5.4
6.8
8.6

FR1730
FR1923
FR1931

2A
2A
2A

C0300A3C
C0350A3C
C0500A3C

176.
194.
246.

4-3/8
6
5-7/8

5-1/4
6-7/8
6-7/8

7-3/4
7-1/2
8-1/2

27
24
34

111
152
149

133
174
174

196
190
215

12.3
10.9
15.4

FR1943
FRC614
FRC827

2A
2A
2A

C0750A3C
C1000A3C
C1500A3C

280.
568.
753.

3-3/4
4-1/8
4-1/2

2
5
7

65
80
96

76
95
114

82
104
114

.9
2.3
3.2

FR1310
FR1513
FR1714

4B
4B
4B

C0050A3B
C0100A3B
C0200A3B

97.
116.
137.

750
1000
1500

115 Volts to 24 Volts, 50/60 Hz
50
100
200

2-19/32
3-3/16
3-13/16

3
3-3/4
4-1/2

208/380/416 Volts to 115/95 Volts, 50/60 Hz
50
100
150
200

2-19/32
3-3/16
3-13/16
3-13/16

3
3-3/4
4-1/2
4-1/2

3-3/4
4-3/4
4-1/2
5

3
5
7
8

98
80
96
96

76
95
114
114

95
120
114
127

1.5
2.3
3.2
3.6

FR1314
FR1516
FR1714
FR1717

2B
2B
2B
2B

C0050A3D
C0100A3D
C0150A3D
C0200A3D

94.
110.
121.
137.

250
300
500

3-13/16
3-13/16
4-3/8

4-1/2
4-1/2
5-1/4

5-1/2
6
6-1/8

10
13
18

96
96
111

114
114
133

139
152
155

4.5
5.4
8.6

FR1723
FR1730
FR1931

2B
2B
2B

C0250A3D
C0300A3D
C0500A3D

169.
176.
246.

4-3/8
6
5-7/8

5-1/4
6-7/8
6-7/8

7-3/4
7-1/2
8-1/2

27
25
33

111
152
149

133
174
174

196
190
215

12.3
10.9
15.4

FR1943
FRC614
FRC827

2B
2B
2B

C0750A3D
C1000A3D
C1500A3D

280.
555.
753.

750
1000
1500



See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Industrial Control Transformers

9-94

November 2003

Type MTC

Type MTC

Vol. 1, Ref. No. [0394]

Features, Benefits
and Functions

Product Specifications

■

Cutler-Hammer standard dry-type distribution transformers are designed
for 60 Hz operation. Transformers
required for other frequencies are
available and must be specifically
designed.

■
■
■
■

Type MTC Transformers

9

Product Description
■

Varnish impregnated core and
coil design.
■ Suitable for indoor applications.

Application Description
Transformers provide stepped down
voltages to machine tool control
devices enabling control circuits to be
isolated from all power and lighting
circuits. This allows the use of
grounded or ungrounded circuits that
are independent of the power or lighting grounds; greater safety is afforded
the operator. The control transformer
line is particularly adaptable on applications where compact construction
is demanded. The MTC line is similar
to the MTA line except it provides
increased regulation.

■

■
■
■
■

Designed specifically for loads
requiring extremely good regulation
— 10% – 200% better regulation
than Type MTA.
UL recognized component for units
rated 1000 VA and below.
CSA certified for units rated 1000 VA
and below.
50/60 Hz operation standard.
100% tested to verify product quality.
Each unit must pass rigid tests for
turns ratio, insulation, continuity,
and over potential.
Performance equals or exceeds
requirements of ANSI/NEMA ST-1.
Regulation exceeds ANSI/NEMA
requirements for all ratings.
50 – 5000 VA ratings.
55ºC rise, 105ºC insulation system.

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards.

Frequency

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-112. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Series-Multiple Windings
Series-multiple windings consist of 2
similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or 240
with a 120 mid-point.

Technical Data
and Specifications
Please refer to Page 9-122.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-95

November 2003

Type MTC

Vol. 1, Ref. No. [0395]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-113. Type MTC
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Frame

Wiring
Style
Diagram 
 Number

Price
U.S.

240/480 Volts to 120 Volts, 60 Hz
230/460 Volts to 115 Volts, 50/60 Hz
220/440 Volts to 110 Volts, 50/60 Hz
50
75
100

2-19/32
2-19/32
2-7/8

3
3
3-3/8

3-3/4
3-3/4
4

2
3
3

66
66
73

76
76
86

95
95
102

.9
1.4
1.4

FR1310
FR1314
FR1413

1
1
1

C0050C2A
C0075C2A
C0100C2A

67.00
78.50
84.00

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4-3/4
4-1/2
5

6
7
8

81
97
97

95
114
114

121
114
127

2.7
3.2
3.6

FR1517
FR1714
FR1717

1
1
1

C0150C2A
C0200C2A
C0250C2A

100.00
116.00
144.00

300
350
500

3-13/16
3-13/16
4-3/8

4-1/2
4-1/2
5-1/4

5-3/8
6
6-1/8

10
11
20

97
97
111

114
114
133

137
152
156

4.5
5.0
9.1

FR1722
FR1726
FR1931

1
1
1

C0300C2A
C0350C2A
C0500C2A

154.00
169.00
206.00

750
1000
1500

4-3/8
5-7/16
6-1/8

5-1/4
6-3/8
6-7/8

7-3/4
7-1/2
8-3/8

28
34
35

111
138
156

133
162
175

197
191
213

12.7
15.4
15.9

FR1934
FR2236
FRC822

1
1
1

C0750C2A
C1000C2A
C1500C2A

272.00
402.00
564.00

2000
3000
5000

6
7-3/8
7-7/8

6-3/4
8-7/16
8-11/16

8-1/2
8-3/4
11

38
53
82

152
187
200

171
214
221

216
222
279

17.3
24.1
37.2

FRC823
FRC824
FRC825

1
1
1

C2000C2A
C3000C2A
C5000C2A

676.00
934.00
1,445.00




See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

Table 9-114. Type MTC with Integrally Mounted 30 Amperes, 600 volt Class with 2-Pole Primary Fuse Block for Rejection Type Fuses
(Fuses Not Included)
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Frame

Style
Wiring
Diagram  Number

Price
U.S.

240/480 Volts to 120 Volts, 60 Hz
230/460 Volts to 115 Volts, 50/60 Hz
220/440 Volts to 110 Volts, 50/60 Hz
50
75
100
150

3-7/8
3-7/8
4-5/32
4-15/32

3
3
3-3/8
3-3/4

3-3/4
3-3/4
4
4-3/4

2.2
3.2
3.2
6.2

98
98
106
114

76
76
86
95

83
95
102
121

1.0
1.5
1.5
2.8

FR1310
FR1314
FR1413
FR1517

1
1
1
1

C0050C2AFB
C0075C2AFB
C0100C2AFB
C0150C2AFB

88.00
101.00
106.00
123.00

200
250
300

5-3/32
5-3/32
5-3/32

4-1/2
4-1/2
4-1/2

4-1/2
5
5-3/8

7.2
8.2
10.2

129
129
129

114
114
114

114
127
137

3.3
3.7
4.7

FR1714
FR1717
FR1722

1
1
1

C0200C2AFB
C0250C2AFB
C0300C2AFB

138.00
166.00
176.00

350
500
750

5-3/32
5-21/32
5-21/32

4-1/2
5-1/4
5-1/4

6
6-1/8
7-3/4

11.2
20.2
28.2

129
144
144

114
133
133

152
156
197

5.1
9.2
12.8

FR1726
FR1931
FR1934

1
1
1

C0350C2AFB
C0500C2AFB
C0750C2AFB

191.00
227.00
294.00

1000
1500
2000

6-23/32
7-13/32
7-9/32

6-3/8
6-7/8
6-3/4

7-1/2
8-3/8
8-1/2

34.2
35.2
38.2

171
188
185

162
175
171

191
213
216

15.5
16.0
17.4

FR2236
FRC822
FRC823

1
1
1

C1000C2AFB
C1500C2AFB
C2000C2AFB

424.00
585.00
697.00



See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
Industrial Control Transformers

9-96

November 2003

Type MTE

Type MTE

Vol. 1, Ref. No. [0396]

Features, Benefits
and Functions
■
■
■
■

■
■

Type MTE Transformers

9

■
■

Product Description

■

■

Epoxy-encapsulated coils.

■

Application Description

■

Transformers provide stepped down
voltages to machine tool control
devices enabling control circuits to be
isolated from all power and lighting
circuits. This allows the use of
grounded or ungrounded circuits that
are independent of the power or lighting grounds; greater safety is afforded
the operator. The control transformer
line is particularly adaptable on applications where compact construction
is demanded.

■

Note: The MTG, “open core-coil design”
has been superseded by the epoxyencapsulated core-coil design MTE with
no change to dimensions or functionality.

■

■

Finger-Safe Terminal Covers (Optional)
■
■

UL listed.
CSA certified.
Epoxy encapsulated.
Laminations of high quality silicon
steel to minimize core losses and
optimize performance.
Copper magnet wire for high
quality, efficient operation.
Secondary fuse clips where
applicable.
Optional primary fusing.
Molded in terminals.
50/60 Hz operation.
55°C rise, 105ºC insulation system.
Performance meets/exceeds
requirements of ANSI/NEMA ST-1.
Regulation exceeds ANSI/NEMA
requirements for all ratings.
25 – 1500 VA ratings.
Molded-in terminals for maximum
durability.

Fits CE marked designs 50 – 750 VA.
Fits MTE designs.
25 – 750 VA.

Table 9-116. Finger-Safe Terminal Covers
Description

Catalog Price
Number U.S. $

4 Terminal Transformers
6 Terminal Transformers

FSK4
FSK6

24.
25.

Finger-Safe Terminal Covers — FSK4

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Options and Accessories

Finger-Safe Terminal Covers — FSK6

Primary Fuse Kit

Finger-Safe Primary Fuse Block Covers

The primary fuse kit includes a 2-pole
class CC fuse block, instructions, and
all associated mounting and wiring
hardware. Fuses are not included.
When installed, the primary fuse kit
will add a maximum of 11/16 inch to
the transformer depth and 1-15/16
inches to the transformer height.

■

Fits 2-pole primary fuse blocks on
MTE designs.

Table 9-117. Finger-Safe Primary Fuse
Block Covers
Description

Catalog Price
Number U.S. $

Primary Fuse Block Covers FSKFB

38.

Table 9-115. Primary Fuse Kit
Description

Catalog Price
Number U.S. $

Primary Fuse Kit

PFK1

26.

Finger-Safe Primary Fuse Block Covers

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-97

November 2003

Type MTE

Vol. 1, Ref. No. [0397]

Product Specifications

Wiring Diagrams

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-118. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Figure 9-8. Diagram 1
Figure 9-11. Diagram 4

9

Series-Multiple Windings
Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series),
or 240 with a 120 mid-point.

Technical Data
and Specifications

Figure 9-9. Diagram 2

Figure 9-12. Diagram 5

Figure 9-10. Diagram 3

Please refer to Page 9-122.

Figure 9-13. Diagram 6

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9-98

Transformers
Industrial Control Transformers
November 2003

Type MTE

Vol. 1, Ref. No. [0398]

Wiring Diagrams

H3

H2

H4

X4

X2

X3

X1

0V

220,230,240 V

380,400,416 V

440,460,480 V

H5

110,115,120 V

H1

H4

23/24/25

H1 H3 H2 H4

H3

0V

H1 H3 H2 H4

H2

550,575,600 V

480 V

X4 X2 X3 X1

Figure 9-14. Diagram 7

H1

240 V

X3

X2

X1

X4 X2 X3 X1

Figure 9-21. Diagram 14
120 V

240 V
H6
0V

208 V

H5

230 V

H4

230 V

24 V

115 V

H2

0V

600 V
575 V
550 V

H3
400 V

Figure 9-18. Diagram 11

H1

H2

575 V

H1

460 V

9

Figure 9-15. Diagram 8
X4

H6
0V

208 V

H5

X3

X2

115 V

115 V

0V

0V
X4

X2

H4

H2

Figure 9-16. Diagram 9

24 V
23 V
22 V

H3

230 V

575 V

H2

400 V

H1

420 V
400 V
380 V

X1

X1

Figure 9-19. Diagram 12

H1

X2

Figure 9-22. Diagram 15

460 V

X2

24 V
23 V
22 V

X3

X1

Figure 9-23. Diagram 16
X1

Figure 9-20. Diagram 13

Figure 9-17. Diagram 10







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-99

November 2003

Type MTE

Vol. 1, Ref. No. [0399]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-119. Type MTE — Product Selection
VA

Dimensions (Inches)
Height

Width

Weight
Lbs.

Depth

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 240 x 480, 230 x 460, 220 x 440 with Jumpers
Secondary: 120/115/110 with Fuse Clips for 13/32 x 1-1/2 Fuses
25
50
75
100

2-9/16
2-9/16
2-9/16
2-7/8

3
3
3
3-3/8

2-1/2
3
3-1/2
3-3/8

1.7
2.6
3.5
4.2

65
65
65
73

76
76
76
86

64
76
89
86

.8
1.2
1.6
1.9

1
1
1
1

C0025E2A
C0050E2A
C0075E2A
C0100E2A

72.00
53.50
64.00
69.00

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

6.7
8.5
10.0

81
97
97

95
114
114

102
102
111

3.0
3.9
4.5

1
1
1

C0150E2A
C0200E2A
C0250E2A

82.00
101.00
117.00

300
350
500

3-13/16
3-13/16
4-3/4

4-1/2
4-1/2
5-1/4

4-3/4
5-1/4
5-1/2

11.3
13.6
19.2

97
97
121

114
114
133

121
133
140

5.1
6.2
8.7

1
1
1

C0300E2A
C0350E2A
C0500E2A

126.00
138.00
173.00

750
1000
1500

4-3/4
5-11/16
6-3/8

5-1/4
6-3/4
7-1/2

7
6-7/16
7-3/8

28.1
29.5
40.0

121
144
162

133
171
191

178
164
187

12.8
13.4
18.1

1
1
1

C0750E2A
C1000E2A
C1500E2A

238.00
634.00
851.00

Primary: 240 x 480 with Jumpers
Secondary: 24 with Fuse Clips for 13/32 x 1-1/2 Fuses (through 500 VA)
50
75
100
150

2-9/16
2-9/16
2-7/8
3-3/16

3
3
3-3/8
3-3/4

3
3-1/2
3-3/8
4

2.7
3.5
4.2
6.7

65
65
73
81

76
76
86
95

76
89
86
102

1.2
1.6
1.9
3.0

2
2
2
2

C0050E2B
C0075E2B
C0100E2B
C0150E2B

62.00
73.00
82.00
107.00

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4
4-3/8
4-3/4

8.5
10.1
11.4

97
97
97

114
114
114

102
111
121

3.9
4.6
5.2

2
2
2

C0200E2B
C0250E2B
C0300E2B

129.00
147.00
161.00

350
500
750

3-13/16
4-3/4
4-3/4

4-1/2
5-1/4
5-1/4

5-1/4
5-5/8
7

13.4
17.5
28.1

97
121
121

114
133
133

133
143
178

6.1
7.9
12.8

2
2
2

C0350E2B
C0500E2B
C0750E2B

174.00
203.00
263.00

Primary: 120 x 240 with Jumpers
Secondary: 24 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

2-9/16
2-9/16
2-7/8

3
3
3-3/8

3
3-1/2
3-3/8

2.6
3.6
4.4

65
65
73

76
76
86

76
89
56

1.2
1.6
2.0

3
3
3

C0050E1B
C0075E1B
C0100E1B

62.00
72.50
82.00

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

6.7
8.3
10.1

81
97
97

95
114
114

102
102
111

3.0
3.8
4.6

3
3
3

C0150E1B
C0200E1B
C0250E1B

107.00
129.00
147.00

300
350
500

3-13/16
3-13/16
4-3/4

4-1/2
4-1/2
5-1/4

4-3/4
5-1/4
5-5/8

11.2
13.2
17.5

97
97
121

114
114
133

121
133
143

5.1
6.0
7.9

3
3
3

C0300E1B
C0350E1B
C0500E1B

161.00
174.00
203.00

Primary: 208/277
Secondary: 120 with Fuse Clips for 13/32 x 1-1/2 Fuses




50
75
100
150

2-9/16
2-9/16
2-7/8
3-3/16

3
3
3-3/8
3-3/4

3
3-1/2
3-3/8
4

2.9
3.8
4.5
6.9

65
65
73
81

76
76
86
95

76
89
86
102

1.3
1.7
2.0
3.1

4
4
4
4

C0050E3A
C0075E3A
C0100E3A
C0150E3A

60.50
71.50
81.50
104.00

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4
4-3/8
4-3/4

8.7
10.2
11.4

97
97
97

114
114
114

102
111
121

3.9
4.6
5.2

4
4
4

C0200E3A
C0250E3A
C0300E3A

127.00
144.00
158.00

350
500
750

3-13/16
4-3/4
4-3/4

4-1/2
5-1/4
5-1/4

5-1/4
5-3/8
7

13.7
17.2
25.7

97
121
121

114
133
133

133
136
178

6.2
7.8
11.7

4
4
4

C0350E3A
C0500E3A
C0750E3A

171.00
196.00
263.00

See Page 9-97 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Industrial Control Transformers

9-100

November 2003

Type MTE

Vol. 1, Ref. No. [0400]

Table 9-120. Type MTE — Product Selection
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 240 x 480 with Jumpers
Secondary: 120 x 240 with Jumpers, Secondary Fuse Clips not Applicable
50
75
100
150

2-9/16
2-9/16
2-7/8
3-3/16

3
3
3-3/8
3-3/4

3
3-1/2
3-3/8
4

2.6
3.5
4.2
6.7

65
65
73
81

76
76
86
95

76
89
86
102

1.2
1.6
1.9
3.1

11
11
11
11

C0050E2CXX
C0075E2CXX
C0100E2CXX
C0150E2CXX

68.
75.
82.
107.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4
4-3/8
4-7/8

8.5
10.0
11.8

97
97
97

114
114
114

102
111
124

3.9
4.6
5.4

11
11
11

C0200E2CXX
C0250E2CXX
C0300E2CXX

129.
144.
158.

350
500
750

3-13/16
4-3/4
4-3/4

4-1/2
5-1/4
5-1/4

5-1/4
5-1/4
7

13.6
17.5
26.4

97
121
121

114
133
133

133
133
178

6.2
8.0
12.0

11
11
11

C0350E2CXX
C0500E2CXX
C0750E2CXX

171.
196.
263.

Primary: 550/575/600
Secondary: 110/115/120 with for 13/32 x 1-1/2 Fuses

9

50
75
100
150

2-9/16
2-9/16
2-7/8
3-3/16

3
3
3-3/8
3-3/4

3
3-1/2
3-3/8
4

2.7
3.6
4.2
6.8

65
65
73
81

76
76
86
95

76
89
86
102

1.2
1.6
1.9
3.1

10
10
10
10

C0050E4C
C0075E4C
C0100E4C
C0150E4C

85.
92.
101.
117.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4
4-3/8
4-3/4

8.4
10.0
11.3

97
97
97

114
114
114

102
111
121

3.8
4.6
5.1

10
10
10

C0200E4C
C0250E4C
C0300E4C

129.
158.
171.

350
500
750

3-13/16
4-3/4
4-3/4

4-1/2
5-1/4
5-1/4

5-1/4
5-3/8
7

13.6
16.8
25.7

97
121
121

114
133
133

133
137
178

6.2
7.6
11.7

10
10
10

C0350E4C
C0500E4C
C0750E4C

186.
200.
267.

Primary: 380/400/415
Secondary: 22/23/24 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

2-9/16
2-9/16
2-7/8

3
3
3-3/8

3
3-1/2
3-3/8

2.5
3.5
4.0

65
65
73

76
76
86

76
89
86

1.1
1.6
1.8

13
13
13

C0050E4H
C0075E4H
C0100E4H

92.
98.
107.

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

6.5
8.2
10.0

81
97
97

95
114
114

102
102
111

3.0
3.7
4.5

13
13
13

C0150E4H
C0200E4H
C0250E4H

124.
134.
163.

300
350
500

3-13/16
3-13/16
4-3/4

4-1/2
4-1/2
5-1/4

4-3/4
5-1/4
5-1/2

11.0
13.6
17.7

97
97
121

114
114
133

121
133
140

5.0
6.2
8.0

13
13
13

C0300E4H
C0350E4H
C0500E4H

178.
192.
208.

Primary: 550/575/600
Secondary: 22/23/24 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100
150

2-9/16
2-9/16
2-7/8
3-3/16

3
3
3-3/8
3-3/4

3
3-1/2
3 3/8
4

2.5
3.5
4.0
6.5

65
65
73
81

76
76
86
95

76
89
86
102

1.1
1.6
1.8
3.0

12
12
12
12

C0050E4W
C0075E4W
C0100E4W
C0150E4W

92.
98.
107.
117.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4
4-3/8
4-3/4

8.2
10.0
11.0

97
97
97

114
114
114

102
111
121

3.7
4.5
5.0

12
12
12

C0200E4W
C0250E4W
C0300E4W

131.
159.
173.

350
500
750

3-13/16
4-3/4
4-1/2

4-1/2
5-1/4
5-1/4

5-1/4
5-1/2
7-3//8

13.6
17.7
28.0

97
121
114

114
133
133

133
140
187

6.2
8.0
12.7

12
12
12

C0350E4W
C0500E4W
C0750E4WXX 

188.
203.
270.





See Page 9-98 for Wiring Diagrams.
Secondary fuse clips are not available on this catalog number.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Industrial Control Transformers

9-101

November 2003

Type MTE

Vol. 1, Ref. No. [0401]

Table 9-121. Types MTE — Product Selection
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 230/460/575
Secondary: 115/95 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100
150

2-9/16
2-7/8
2-7/8
3-3/16

3
3-3/8
3-3/8
3-3/4

3
3-3/8
3-7/8
4-1/4

3.5
4.5
6.0
7.7

65
73
73
81

76
86
86
95

76
86
98
108

1.6
2.0
2.7
3.5

5
5
5
5

C0050E3C
C0075E3C
C0100E3C
C0150E3C

85.50
92.50
102.00
118.00

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/4
4-3/4
5-1/8

9.0
9.7
11.7

97
97
97

114
114
114

108
121
130

4.1
4.4
5.3

5
5
5

C0200E3C
C0250E3C
C0300E3C

131.00
161.00
174.00

350
500
750

4-3/4
4-3/4
4-3/4

5-1/4
5-1/4
5-1/4

5
5-5/8
7

16.5
21.5
28.0

121
121
121

133
133
133

127
143
178

7.5
9.8
12.7

5
5
5

C0350E3C
C0500E3C
C0750E3C

189.00
203.00
271.00

Primary: 380/400/415
Secondary: 110 x 220 with Jumpers; Fuse Clips not Applicable
50
75
100
150

2-9/16
2-9/16
2-7/8
3-3/16

3
3
3-3/8
3-3/4

3
3-1/2
3-9/16
4

3.0
4.0
5.2
7.0

65
65
73
81

76
76
86
95

76
89
90
102

1.4
1.8
2.4
3.2

6
6
6
6

C0050E4D
C0075E4D
C0100E4D
C0150E4D

85.00
92.00
101.00
117.00

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4
4-3/8
4-3/4

8.7
10.2
11.0

97
97
97

114
114
114

102
111
121

3.9
4.6
5.0

6
6
6

C0200E4D
C0250E4D
C0300E4D

129.00
158.00
171.00

350
500
750

3-13/16
4-3/4
4-3/4

4-1/2
5-1/4
5-1/4

5-1/4
5-3/8
7

13.0
20.0
28.0

97
121
121

114
133
133

133
136
178

5.9
9.1
12.7

6
6
6

C0350E4D
C0500E4D
C0750E4D

186.00
200.00
267.00

Primary: 200/220/440, 208/230/460, 240/480
Secondary: 23/110, 24/115, 25/120 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

2-9/16
2-7/8
3-3/16

3
3-3/8
3-3/4

3-1/4
3-1/2
5-5/8

3.4
4.8
5.9

65
73
81

76
86
95

83
89
143

1.5
2.2
2.7

7
7
7

C0050E5E
C0075E5E
C0100E5E

76.50
83.00
92.50

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4-3/8
4-1/2
5-1/4

7.9
10.6
13.9

81
97
97

95
114
114

111
114
133

3.6
4.8
6.3

7
7
7

C0150E5E
C0200E5E
C0250E5E

117.00
139.00
161.00

300
350
500

4-3/4
4-3/4
4-3/4

5-1/4
5-1/4
5-1/4

5-1/8
5-3/8
6-7/8

15.5
16.8
23.4

121
121
121

133
133
133

130
136
175

7.0
7.6
10.6

7
7
7

C0300E5E
C0350E5E
C0500E5E

177.00
184.00
222.00

Universal Design (MTE Epoxy Encapsulated)
Primary: 240/416/480/600, 230/400/460/575, 220/380/440/550, 208/500
Secondary: 99/120/130, 95/115/125, 91/110/120, 85/100/110 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
100
150
250

2-7/8
3-3/16
3-13/16
3-13/16

3-3/8
3-3/4
4-1/2
4-1/2

4
4-5/8
4-7/16
5-7/8

4.0
6.6
8.8
14.7

73
81
97
97

86
95
114
114

102
117
113
149

1.8
3.0
4.0
6.7

8
8
8
8

C0050E6U 
C0100E6U 
C0150E6U 
C0250E6U 

150.00
159.00
165.00
197.00

350
500
750

4-7/16
4-7/16
5-3/4

5-1/4
5-1/4
6-3/4

5-5/8
7
5-11/16

18.6
25.6
30.5

113
113
146

133
133
171

143
178
144

8.4
11.6
13.8

8
8
8

C0350E6U 
C0500E6U 
C0750E6U 

228.00
287.00
332.00






See Pages 9-97 and 9-98 for Wiring Diagrams.
Type MTG Open Core-Coil Universal Design has been superseded by Type MTE Epoxy Encapsulated Universal Design with no changes to form,
fit or function.
Type MTE Epoxy Encapsulated Universal Design.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Industrial Control Transformers

9-102

November 2003

Type MTE

Vol. 1, Ref. No. [0402]

Table 9-122. Transformers with Primary Fuse Blocks — Product Selection
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 240 x 480, 230 x 460, 220 x 440 with Jumpers and Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 120/115/110 with Fuse Clips for 13/32 x 1-1/2 Fuses

9

50
75
100

3-15/16
3-15/16
4-1/4

3
3
3-3/8

3
3-1/2
3-3/8

2.8
3.7
4.4

100
100
108

76
76
86

76
89
86

1.3
1.7
2.0

1
1
1

C0050E2AFB
C0075E2AFB
C0100E2AFB

71.00
82.00
87.00

150
200
250

4-9/16
5-3/16
5-3/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

6.9
8.7
10.2

116
132
132

95
114
114

102
102
111

3.1
3.9
4.6

1
1
1

C0150E2AFB
C0200E2AFB
C0250E2AFB

101.00
119.00
136.00

300
350
500

5-3/16
5-3/16
6-1/8

4-1/2
4-1/2
5-1/4

4-3/4
5-1/4
5-1/2

11.5
13.8
19.4

132
132
156

114
114
133

121
133
140

5.2
6.3
8.8

1
1
1

C0300E2AFB
C0350E2AFB
C0500E2AFB

143.00
156.00
191.00

750
1000
1500

6-1/8
7-1/16
7-3/4

5-1/4
6-3/4
7-1/2

7
6-7/16
7-3/8

28.3
29.7
40.2

156
179
197

133
171
191

178
164
187

12.8
13.4
18.1

1
1
1

C0750E2AFB
C1000E2AFB
C1500E2AFB

256.00
651.00
868.00

Primary: 240 x 480 with Jumpers and Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 24 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

3-15/16
3-15/16
4-1/4

3
3
3-3/8

3
3-1/2
3-3/8

2.8
3.8
4.4

100
100
108

76
76
86

76
89
86

1.3
1.7
2.1

2
2
2

C0050E2BFB
C0075E2BFB
C0100E2BFB

80.00
90.50
101.00

150
200
250

4-9/16
5-3/16
5-3/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

6.9
8.7
10.3

116
132
132

95
114
114

102
102
111

3.1
3.9
4.7

2
2
2

C0150E2BFB
C0200E2BFB
C0250E2BFB

125.00
147.00
164.00

300
350
500

5-3/16
5-3/16
6-1/8

4-1/2
4-1/2
5-1/4

4-3/4
5-1/4
5-5/8

11.6
13.6
17.7

132
132
156

114
114
133

121
133
143

5.3
6.2
8.0

2
2
2

C0300E2BFB
C0350E2BFB
C0500E2BFB

179.00
192.00
222.00

Primary: 120 x 240 with Jumpers and Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 24 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

3-15/16
3-15/16
4-1/4

3
3
3-3/8

3
3 1/2
3 3/8

2.8
3.8
4.6

100
100
108

76
76
86

76
89
86

1.3
1.7
2.1

3
3
3

C0050E1BFB
C0075E1BFB
C0100E1BFB

80.00
90.50
101.00

150
200
250

4-9/16
5-3/16
5-3/16

3-3/4
4-1/2
4-1/2

4
4
4 3/8

6.9
8.5
10.3

116
132
132

95
114
114

102
102
111

3.1
3.9
4.7

3
3
3

C0150E1BFB
C0200E1BFB
C0250E1BFB

125.00
147.00
164.00

300
350
500

5-3/16
5-3/16
6-1/8

4-1/2
4-1/2
5-1/4

4 3/4
5 1/4
5 5/8

11.4
13.4
17.7

132
132
156

114
114
133

121
133
143

5.2
6.1
8.0

3
3
3

C0300E1BFB
C0350E1BFB
C0500E1BFB

180.00
192.00
222.00

Primary: 208/277 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 120 with Fuse Clips for 13/32 x 1-1/2 Fuses




50
75
100

3-15/16
3-15/16
4-1/4

3
3
3-3/8

3
3-1/2
3-3/8

3.1
4.0
4.7

100
100
108

76
76
86

76
89
86

1.4
1.8
2.1

4
4
4

C0050E3AFB
C0075E3AFB
C0100E3AFB

78.50
90.00
100.00

150
200
250

4-9/16
5-3/16
5-3/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

7.1
8.9
10.4

116
132
132

95
114
114

102
102
111

3.2
4.0
4.7

4
4
4

C0150E3AFB
C0200E3AFB
C0250E3AFB

122.00
145.00
162.00

300
350
500

5-3/16
5-3/16
6-1/8

4-1/2
4-1/2
5-1/4

4-3/4
5-1/4
5-3/8

11.6
13.9
17.4

132
132
156

114
114
133

121
133
143

5.3
6.3
7.9

4
4
4

C0300E3AFB
C0350E3AFB
C0500E3AFB

176.00
188.00
213.00

See Page 9-97 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Industrial Control Transformers

9-103

November 2003

Type MTE

Vol. 1, Ref. No. [0403]

Table 9-123. Transformers with Primary Fuse Blocks — Product Selection
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 550/575/600 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 110/115/120 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100
150

3-15/16
3-15/16
4-1/4
4-9/16

3
3
3 -3/8
3-3/4

3
3-1/2
3 3/8
4

2.9
3.8
4.4
7.0

100
100
108
116

76
76
86
95

76
89
86
102

1.3
1.7
2.0
3.2

10
10
10
10

C0050E4CFB
C0075E4CFB
C0100E4CFB
C0150E4CFB

103.
110.
119.
135.

200
250
300

5-3/16
5-3/16
5-3/16

4-1/2
4-1/2
4-1/2

4
4 3/8
4 3/4

8.6
10.2
11.5

132
132
132

114
114
114

102
111
121

3.9
4.6
5.2

10
10
10

C0200E4CFB
C0250E4CFB
C0300E4CFB

147.
176.
188.

350
500
750

5-3/16
6-1/8
6-1/8

4-1/2
5-1/4
5-1/4

5 1/4
5 3/8
7

13.8
17.0
25.9

132
156
156

114
133
133

133
137
178

6.3
7.7
11.8

10
10
10

C0350E4CFB
C0500E4CFB
C0750E4CFB

204.
218.
285.

Primary: 380/400/415 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 22/23/24 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

2-9/16
2-9/16
2-7/8

3
3
3-3/8

3
3-1/2
3-3/8

2.6
3.7
4.2

65
65
73

76
76
86

76
89
86

1.2
1.7
1.9

13
13
13

C0050E4HFB
C0075E4HFB
C0100E4HFB

110.
115.
125.

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

6.7
8.4
10.2

81
97
97

95
114
114

102
102
111

3.0
3.8
4.6

13
13
13

C0150E4HFB
C0200E4HFB
C0250E4HFB

142.
152.
181.

Primary: 550/575/600 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 22/23/24 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

2-9/16
2-9/16
2-7/8

3
3
3-3/8

3
3-1/2
3-3/8

2.7
3.7
4.2

65
65
73

76
76
86

76
89
86

1.2
1.7
1.9

12
12
12

C0050E4WFB
C0075E4WFB
C0100E4WFB

110.
115.
125.

150
200
250

3-3/16
3-13/16
3-13/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

6.7
8.4
10.2

81
97
97

95
114
114

102
102
111

3.0
3.8
4.6

12
12
12

C0150E4WFB
C0200E4WFB
C0250E4WFB

135.
150.
178.




See Page 9-98 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

Transformers
Industrial Control Transformers

9-104

November 2003

Type MTE

Vol. 1, Ref. No. [0404]

Table 9-124. Transformers with Primary Fuse Blocks — Product Selection
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 230/460/575 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 115/95 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

3-13/16
4-1/4
4-1/4

3
3-3/8
3-3/8

3
3-3/8
3-7/8

3.7
4.7
6.2

97
108
108

76
86
86

76
86
98

1.7
2.1
2.8

5
5
5

C0050E3CFB
C0075E3CFB
C0100E3CFB

104.
111.
119.

150
200
250

4-9/16
5-3/16
5-3/16

3-3/4
4-1/2
4-1/2

4-1/4
4-1/4
4-3/4

7.9
9.2
9.9

116
132
132

95
114
114

108
108
121

3.6
4.2
4.5

5
5
5

C0150E3CFB
C0200E3CFB
C0250E3CFB

136.
150.
179.

300
350
500

5-3/16
6-1/8
6-1/8

4-1/2
5-1/4
5-1/4

5-1/8
5
5-7/8

11.9
16.7
21.7

132
156
156

114
133
133

130
127
149

5.4
7.6
9.9

5
5
5

C0300E3CFB
C0350E3CFB
C0500E3CFB

192.
206.
221.

Primary: 380/400/415 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 110 x 220 with Jumpers; Fuse Clips Not Available

9

50
75
100

3-15/16
3-15/16
4-1/4

3
3
3-3/8

3
3-1/2
3-9/16

3.2
4.2
5.4

100
100
108

76
76
86

76
89
90

1.5
1.9
2.5

6
6
6

C0050E4DFB
C0075E4DFB
C0100E4DFB

103.
110.
119.

150
200
250

4-9/16
5-3/16
5-3/16

3-3/4
4-1/2
4-1/2

4
4
4-3/8

7.2
8.9
10.4

116
132
132

95
114
114

102
102
111

3.3
4.0
4.7

6
6
6

C0150E4DFB
C0200E4DFB
C0250E4DFB

135.
147.
176.

300
350
500

5-3/16
5-3/16
6-1/8

4-1/2
4-1/2
5-1/4

4-3/4
5-1/4
5-5/8

11.2
13.2
20.2

132
132
156

114
114
133

121
133
143

5.1
6.0
9.2

6
6
6

C0300E4DFB
C0350E4DFB
C0500E4DFB

188.
204.
218.

Primary: 200/220/440, 208/230/460, 240/480 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 23/110, 24/115, 25/120 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
75
100

3-15/16
4-1/4
4-9/16

3
3-3/8
3-3/4

3-1/4
3-1/2
3-5/8

3.6
5.0
6.1

100
108
116

76
86
95

83
89
92

1.6
2.3
2.8

7
7
7

C0050E5EFB
C0075E5EFB
C0100E5EFB

94.
101.
111.

150
200
250

4-9/16
5-3/16
5-3/16

3-3/4
4-1/2
4-1/2

4-3/8
4-1/2
5-1/4

8.1
10.8
14.1

116
132
132

95
114
114

111
114
133

3.7
4.9
6.4

7
7
7

C0150E5EFB
C0200E5EFB
C0250E5EFB

135.
157.
180.

300
350
500

6-1/8
6-1/8
6-1/8

5-1/4
5-1/4
5-1/4

5-1/8
5-3/8
6-7/8

15.7
17.0
23.6

156
156
156

133
133
133

130
136
175

7.1
7.7
10.7

7
7
7

C0300E5EFB
C0350E5EFB
C0500E5EFB

195.
202.
239.

Universal Design (MTE Epoxy Encapsulated)
Primary: 240/416/480/600, 230/400/460/575, 220/380/440/550, 208/500 with Two-Pole Primary Fuse Block for Rejection Type Fuses
Secondary: 99/120/130, 95/115/125, 91/110/120, 85/100/110 with Fuse Clips for 13/32 x 1-1/2 Fuses
50
100
150

4-1/4
4-9/16
5-3/16

3-3/8
3-3/4
4-1/2

4
4-5/8
4-7/16

4.2
6.8
9.0

108
116
132

86
95
114

102
117
113

1.9
3.1
4.1

8
8
8

C0050E6UFB 
C0100E6UFB 
C0150E6UFB 

167.
178.
183.

250
350
500

5-3/16
5-13/16
5-13/16

4-1/2
5-1/4
5-1/4

5-7/8
5-5/8
7

14.9
18.8
25.8

132
148
148

114
133
133

149
143
178

6.8
8.5
11.7

8
8
8

C0250E6UFB 
C0350E6UFB 
C0500E6UFB 

215.
246.
306.






See Pages 9-97 and 9-98 for Wiring Diagrams.
Type MTG Open Core-Coil Universal Design has been superseded by Type MTE Epoxy Encapsulated Universal Design with no changes to form,
fit or function.
Type MTE Epoxy Encapsulated Universal Design.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Industrial Control Transformers

9-105

November 2003

Type MTK

Vol. 1, Ref. No. [0405]

Type MTK

Features, Benefits
and Functions

Product Specifications

■

Industry standards classify insulation
systems and rise as shown below:

■
■
■
■
■
■
■

Epoxy resin-impregnated coil.
■ Economical solution for high
inrush applications.

Application Description
Transformers provide stepped down
voltages to machine tool control
devices enabling control circuits to be
isolated from all power and lighting
circuits. This allows the use of
grounded or ungrounded circuits that
are independent of the power or lighting grounds; greater safety is afforded
the operator. The control transformer
line is particularly adaptable on applications where compact construction
is demanded.

Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

Standards and Certifications
Industry Standards

Series-Multiple Windings

All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Series-multiple windings consist of 2
similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or 240
with a 120 mid-point.

■

■

Table 9-125. Insulation System Classification

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Type MTK Transformers

Product Description

UL listed.
CSA certified.
Epoxy resin impregnated coil design.
Copper magnet wire for high
quality, efficient operation.
50/60 Hz operation.
115°C rise, 180ºC insulation system.
Performance meets/exceeds
requirements of ANSI/NEMA ST-1.
Regulation exceeds ANSI/NEMA
requirements for all ratings.
500 – 5000 VA ratings.

Insulation System and Temperature Rise

Technical Data
and Specifications
Please refer to Page 9-122.

The following pages provide listings for most
standard transformer ratings and styles.
For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

9-106

Transformers
Industrial Control Transformers
November 2003

Type MTK

Vol. 1, Ref. No. [0406]

Wiring Diagrams

Figure 9-24. Diagram 1
Figure 9-28. Diagram 5

Figure 9-32. Diagram 9

9

Figure 9-25. Diagram 2
Figure 9-33. Diagram 10
Figure 9-29. Diagram 6

Figure 9-26. Diagram 3

Figure 9-30. Diagram 7

240 V

480 V

H1 H3 H2 H4

H1 H3 H2 H4

H1

H3

X4

X2

H2

H4

X3

X1

X4 X2 X3 X1

X4 X2 X3 X1

120 V

240 V

Figure 9-34. Diagram 11

Figure 9-27. Diagram 4
Figure 9-31. Diagram 8







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-107

November 2003

Type MTK

Vol. 1, Ref. No. [0407]

Wiring Diagrams

Figure 9-36. Diagram 13

Figure 9-37. Diagram 14

X4

X3

X4

X3

X2

H6

115 V

0V

208 V

H5

230 V
115 V

400 V

H4

0V

0V

460 V

H3

X1

Figure 9-39. Diagram 16

X2

9

H6
0V

208 V

H5

230 V

H4

230 V

X1

H3
400 V

H2
460 V

H1
575 V

H2

H2

575 V
X1

115 V

24 V
23 V
22 V

X2

0V

X2

420 V
400 V
380 V

110,115,120 V

440,460,480 V
X3

H1

H1

H4

23/24/25

X1

Figure 9-35. Diagram 12

H3

220,230,240 V

H2

380,400,416 V

H1

24 V

24 V
23 V
22 V

H2

0V

X2

600 V
575 V
550 V

550,575,600 V

H1

X1

Figure 9-38. Diagram 15

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







Transformers
Industrial Control Transformers

9-108

November 2003

Type MTK

Vol. 1, Ref. No. [0408]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-126. Type MTK — Product Selection
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 240 x 480, 230 x 460, 220 x 440
Secondary: 120/115/110
500
750
1000
1500

3-13/16
4-7/16
4-7/16
5-11/16

4-1/2
5-1/2
5-1/4
6-3/4

6
6-1/2
7-7/8
6-3/4

13.0
19.5
29.8
30.0

97
113
113
144

114
133
133
171

152
165
200
171

5.9
8.9
13.6
13.6

1
1
1
1

C0500K2A
C0750K2A
C1000K2A
C1500K2A

154.
215.
298.
413.

2000
3000
5000

5-11/16
7-9/16
7-9/16

6-3/4
9
9

7
7-1/2
7-3/4

38.0
53.0
89.0

144
192
192

171
229
229

178
191
197

17.3
24.1
40.5

1
1
1

C2000K2A
C3000K2A
C5000K2A

452.
700.
1,160.

6-3/8
6-3/4
6-3/4

7-1/8
7-1/2
8-1/4

29.0
33.0
43.0

137
144
144

162
171
171

181
191
210

13.1
15.0
19.5

4
4
4

C1000K3A
C1500K3A
C2000K3A

329.
452.
497.

8-1/4
10-1/2

64.0
102.0

194
259

229
229

210
267

29.0
46.3

4
4

C3000K3A
C5000K3A

770.
1,270.

29.2
33.5
42.5

137
144
192

162
171
229

184
210
192

13.3
15.2
19.3

5
5
5

C1000K3C
C1500K3C
C2000K3C

339.
462.
511.

8-5/8
13-1/2

63.7
102.0

192
259

229
229

219
343

29.0
46.4

5
5

C3000K3C
C5000K3C

798.
1,310.

7-1/8
8-1/4
9-1/4

29.0
43.0
55.0

137
144
144

162
171
171

181
210
235

13.1
19.5
25.0

9
9
9

C1000K3D
C1500K3D
C2000K3D

339.
462.
511.

8-5/8
11

74.0
108.0

194
259

229
229

219
279

33.5
49.0

9
9

C3000K3D
C5000K3D

798.
1,310.

7-1/8
7-1/2
8-1/4

29.0
33.0
43.0

137
144
144

162
171
171

181
191
210

13.1
15.0
19.5

10
10
10

C1000K4C
C1500K4C
C2000K4C

339.
462.
511.

8-1/4
10-1/2

64.0
102.0

194
259

229
229

210
267

29.0
46.3

10
10

C3000K4C
C5000K4C

798.
1,310.

6-1/2
7-1/2
8-1/4

28.0
33.0
43.0

144
144
144

171
171
171

165
191
210

12.7
15.0
19.5

6
6
6

C1000K4D
C1500K4D
C2000K4D

332.
455.
504.

8-1/4
10-1/2

64.0
102.0

194
259

229
229

210
267

29.0
46.3

6
6

C3000K4D
C5000K4D

784.
1,280.

Primary: 208/277
Secondary: 120

9

1000
1500
2000
3000
5000

5-3/8
5-11/16
5-11/16
7-5/8
10-3/16

9
9

Primary: 230/460/575
Secondary: 115/95
1000
1500
2000

5-3/8
5-11/16
7-9/16

6-3/8
6-3/4
9

3000
5000

7-9/16
7-3/16

9
9

7-1/8
8-1/4
7-9/16

Primary: 208/380/416
Secondary: 115/95
1000
1500
2000
3000
5000

5-3/8
5-11/16
5-11/16
7-5/8
10-3/16

6-3/8
6-3/4
6-3/4
9
9

Primary: 550/575/600
Secondary: 110/115/120
1000
1500
2000
3000
5000

5-3/8
5-11/16
5-11/16
7-5/8
10-3/16

6-3/8
6-3/4
6-3/4
9
9

Primary: 380/400/415
Secondary: 110 x 220
1000
1500
2000
3000
5000



5-11/16
5-11/16
5-11/16
7-5/8
10-3/16

6-3/4
6-3/4
6-3/4
9
9

See Page 9-106 and for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Industrial Control Transformers

9-109

November 2003

Type MTK

Vol. 1, Ref. No. [0409]

Table 9-127. Type MTK — Product Selection
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 240 x 480 with Jumpers
Secondary: 120 x 240 with Jumpers, Secondary Fuse Clips Not Applicable
1000
1500
2000

4-7/16
5-11/16
5-3/4

5-1/4
6-3/4
6-3/4

7-7/8
7-1/4
8

26.4
31.0
40.0

113
144
146

133
171
171

200
184
203

12.0
14.1
18.2

11
11
11

C1000K2CXX
C1500K2CXX
C2000K2CXX

329.
462.
599.

3000
5000

7-5/8
7-5/8

9
9

7-1/2
9-1/4

56.0
85.5

194
194

229
229

191
235

25.5
28.9

11
11

C3000K2CXX
C5000K2CXX

770.
1,270.

6-3/4
8-3/4

19.0
26.4

114
114

133
133

171
222

8.6
12.0

3
3

C0750K1B
C1000K1B

276.
413.

26.5
38.5
52.0

146
146
146

171
171
171

165
200
233

12.0
17.5
23.6

8
8
8

C1000K6U
C1500K6U
C2000K6U

511.
746.
928.

68.0
105.0

197
248

229
229

191
267

30.9
47.7

8
8

C3000K6U
C5000K6U

1,305.
1,700.

Primary: 120 x 240 with Jumpers
Secondary: 24
750
1000

4-1/2
4-1/2

5-1/4
5-1/4

Primary: 240/416/480/600, 230/400/460/575, 220/380/440/550, 208/500
Secondary: 99/120/130, 95/115/125, 91/110/120, 85/100/110
1000
1500
2000

5-3/4
5-3/4
5-3/4

6-3/4
6-3/4
6-3/4

3000
5000

7-3/4
9-7/8

9
9




6-1/2
7-7/8
9-3/16
7-1/2
10-1/2

See Page 9-106 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







9

9-110

Transformers
Industrial Control Transformers
November 2003

CE Marked

CE Marked

Vol. 1, Ref. No. [0410]

Features, Benefits
and Functions
Type MTE
■
■
■
■
■

Terminal Type A
■

9

Application Description

■

Transformers provide stepped down
voltages to machine tool control devices
enabling control circuits to be isolated
from all power and lighting circuits.
This allows the use of grounded or
ungrounded circuits that are independent of the power or lighting grounds;
greater safety is afforded the operator.
The control transformer line is particularly adaptable on applications where
compact construction is demanded.

■

■

■
■

UL listed.
CSA certified.
Epoxy encapsulated coil design.
Copper magnet wire for high
quality, efficient operation.
Laminations of high quality silicon
steel to minimize core losses and
optimize performance.
Molded-in terminals.
50/60 Hz operation.
55°C rise, class 105 insulation.
Performance meets/exceeds
requirements of ANSI/NEMA ST-1.
Regulation exceeds ANSI/NEMA
requirements for all ratings.
Non-short circuit proof transformer,
isolation type.

Finger-Safe Terminal Covers (Optional)
■
■

Table 9-128. Finger-Safe Terminal Covers
Description

Catalog Price
Number U.S. $

4 Terminal Transformers
6 Terminal Transformers

FSK4
FSK6

Type MTK
■
■
■
■
■
■
■
■
■

Fits CE marked designs 50 – 750 VA.
Fits MTE designs 25 – 750 VA.

24.
25.

Finger-Safe Terminal Covers — FSK4

UL listed.
CSA certified.
Epoxy resin-impregnated coil design.
Copper magnet wire for high
quality, efficient operation.
50/60 Hz operation.
115°C rise, 180°C insulation system.
Performance meets/exceeds
requirements of ANSI/NEMA ST-1.
Regulation exceeds ANSI/NEMA
requirements for all ratings.
500 – 5000 VA ratings.
Finger-Safe Terminal Covers — FSK6

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards. All 600 volt
class transformers are UL listed unless
otherwise noted.

Finger-Safe Primary Fuse Block Covers
■

Fits 2-pole primary fuse blocks on
MTE designs.

Table 9-129. Finger-Safe Primary Fuse
Block Covers
Description

Catalog
Number

Primary Fuse Block Covers FSKFB

Price
U.S. $
38.

Options and Accessories
Protection Index IP00
When terminal covers are installed on
primary and secondary, and fuse block
covers are used, the Protection Index
is IP20.

Finger-Safe Primary Fuse Block Covers

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-111

November 2003

CE Marked

Vol. 1, Ref. No. [0411]

Product Specifications

Wiring Diagrams

Overload Capability
Short-term overload is designed into
transformers as required by ANSI.
Basically, dry-type distribution transformers will deliver 200% nameplate
load for one-half hour; 150% load for
one-hour; and 125% load for four-hours
without being damaged provided that
a constant 50% load precedes and
follows the overload. See ANSI
C57.96-01.250 for additional limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Figure 9-40. Diagram 1
Figure 9-43. Diagram 4

9

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-130. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

Figure 9-41. Diagram 2

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

Figure 9-44. Diagram 5

Series-Multiple Windings
Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or 240
with a 120 mid-point.

Figure 9-42. Diagram 3

Figure 9-45. Diagram 6

Technical Data
and Specifications
Please refer to Page 9-122.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9-112

Transformers
Industrial Control Transformers
November 2003

CE Marked

Vol. 1, Ref. No. [0412]

Wiring Diagrams

H3

H2

H4

X4

X2

X3

X1

X4 X2 X3 X1

Figure 9-46. Diagram 7

0V

380,400,416 V

220,230,240 V

H4

110,115,120 V

H1

440,460,480 V

H1 H3 H2 H4

H3

23/24/25

H1 H3 H2 H4

H2

0V

480 V

550,575,600 V

H1

240 V

X3

X2

X1

X4 X2 X3 X1

Figure 9-53. Diagram 14
120 V

240 V
H6
0V

208 V

H5

230 V

H4

230 V

24 V

115 V

H2

0V

600 V
575 V
550 V

H3
400 V

Figure 9-50. Diagram 11

H1

H2

575 V

H1

460 V

9

Figure 9-47. Diagram 8
X4

X4

X2

X1

H5

H6
0V

208 V

H4

X3

X2

115 V

0V

115 V

H2

Figure 9-48. Diagram 9

24 V
23 V
22 V

H3

230 V

575 V

H2

0V

420 V
400 V
380 V

H1

400 V

X1

Figure 9-51. Diagram 12

H1

X2

Figure 9-54. Diagram 15

460 V

X2

24 V
23 V
22 V

X3

X1

Figure 9-55. Diagram 16
X1

Figure 9-52. Diagram 13

Figure 9-49. Diagram 10







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-113

November 2003

CE Marked

Vol. 1, Ref. No. [0413]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-131. Type MTE CE Marked IP00
VA

Dimensions (Inches)
Height

Width

Weight
Lbs.

Depth

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 240 x 480, 230 x 460, 220 x 440 with Jumpers
Secondary: 120/115/110
50
75
100
150

2-9/16
2-7/8
3-3/16
3-13/16

3
3-3/8
3-3/4
4-1/2

3-3/8
3-1/2
3-5/8
4

3.5
4.8
5.9
8.5

65
73
81
97

76
86
95
114

86
89
92
102

1.6
2.2
2.7
3.9

1
1
1
1

CE0050E2A
CE0075E2A
CE0100E2A
CE0150E2A

98.
110.
122.
149.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/2
4-3/4
5-1/4

10.6
11.3
13.2

97
97
97

114
114
114

114
121
133

4.8
5.1
6.0

1
1
1

CE0200E2A
CE0250E2A
CE0300E2A

159.
206.
217.

350
500
750

4-3/4
4-3/4
4-3/4

5-1/4
5-1/4
5-1/4

5
6
7-3/8

14.9
21.0
29.8

121
121
121

133
133
133

127
152
187

6.8
9.5
13.5

1
1
1

CE0350E2A
CE0500E2A
CE0750E2A

252.
274.
406.

9

Primary: 240 x 480 with Jumpers
Secondary: 24
50
75
100
150

2-9/16
2-7/8
3-3/16
3-13/16

3
3-3/8
3-3/4
4-1/2

3-1/4
3-1/4
3-5/8
4

3.4
4.2
5.9
8.5

65
73
81
97

76
86
95
114

83
83
92
102

1.5
1.9
2.7
3.9

2
2
2
2

CE0050E2B
CE0075E2B
CE0100E2B
CE0150E2B

109.
119.
135.
168.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/4
4-3/4
5-1/4

10.6
11.3
13.2

97
97
97

114
114
114

108
121
133

4.5
5.1
6.0

2
2
2

CE0200E2B
CE0250E2B
CE0300E2B

179.
227.
246.

350
500
750

4-3/4
4-3/4
4-3/4

5-1/4
5-1/4
5-1/4

5
5-1/2
7

14.9
19.2
28.1

121
121
121

133
133
133

127
140
178

6.8
8.7
12.8

2
2
2

CE0350E2B
CE0500E2B
CE0750E2B

276.
301.
441.

Primary: 120 x 240 with Jumpers
Secondary: 24
50
75
100
150

2-9/16
2-7/8
3-3/16
3-13/16

3
3-3/8
3-3/4
4-1/2

3-1/4
3-1/4
3-5/8
4

3.4
4.2
5.9
8.5

65
73
81
97

76
86
95
114

83
83
92
102

1.5
1.9
2.7
3.9

3
3
3
3

CE0050E1B
CE0075E1B
CE0100E1B
CE0150E1B

109.
119.
135.
168.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/4
4-3/4
5-1/4

10.6
11.3
13.2

97
97
97

114
114
114

108
121
133

4.5
5.1
6.0

3
3
3

CE0200E1B
CE0250E1B
CE0300E1B

179.
227.
246.

350
500
750

4-3/4
4-3/4
4-3/4

5-1/4
5-1/4
5-1/4

5
5-1/2
7-3/8

14.9
19.2
29.8

121
121
121

133
133
133

127
140
187

6.8
8.7
13.5

3
3
3

CE0350E1B
CE0500E1B
CE0750E1B

276.
301.
441.

Primary: 550/575/600
Secondary: 110/115/120
50
75
100
150

2-9/16
2-7/8
3-3/16
3-13/16

3
3-3/8
3-3/4
4-1/2

3-3/8
3-1/2
3-5/8
4

3.5
4.8
5.9
8.5

65
73
81
97

76
86
95
114

86
89
92
102

1.6
2.2
2.7
3.9

10
10
10
10

CE0050E4C
CE0075E4C
CE0100E4C
CE0150E4C

107.
118.
133.
166.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/2
4-3/4
5-1/4

10.6
11.3
13.2

97
97
97

114
114
114

114
121
133

4.8
5.1
6.0

10
10
10

CE0200E4C
CE0250E4C
CE0300E4C

177.
224.
243.

350
500
750

4-3/4
4-3/4
4-3/4

5-1/4
5-1/4
5-1/4

5
6
7-3/8

14.9
21.0
29.8

121
121
121

133
133
133

127
152
187

6.8
9.5
13.5

10
10
10

CE0350E4C
CE0500E4C
CE0750E4C

273.
298.
438.




See Pages 9-111 and 9-112 for Wiring Diagrams.

Note: Transformers are designed to operate in a maximum ambient of 40°C.
Contact your local Cutler-Hammer sales office for availability on additional CE Marked control transformers.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







Transformers
Industrial Control Transformers

9-114

November 2003

CE Marked

Vol. 1, Ref. No. [0414]

Table 9-132. Type MTE CE Marked IP00
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Wiring
Diagram 


Style
Number

Price
U.S. $

Primary: 380/400/415
Secondary: 110 x 220 with Jumpers
50
75
100
150

2-9/16
2-7/8
3-3/16
3-13/16

3
3-3/8
3-3/4
4-1/2

3-1/2
3-1/2
3-5/8
4

3.5
4.8
5.9
8.5

65
73
81
97

76
86
95
114

89
89
92
102

1.6
2.2
2.7
3.9

6
6
6
6

CE0050E4D
CE0075E4D
CE0100E4D
CE0150E4D

143.
154.
166.
194.

200
250
300

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/2
4-3/4
5-1/4

10.6
11.3
13.2

97
97
97

114
114
114

114
121
133

4.8
5.1
6.0

6
6
6

CE0200E4D
CE0250E4D
CE0300E4D

206.
268.
281.

350
500
750

3-13/16
4-3/4
4-3/4

4-1/2
5-1/4
5-1/4

5-1/2
6
7-3/8

15.2
21.0
29.8

97
121
121

114
133
133

140
152
187

6.9
9.5
13.5

6
6
6

CE0350E4D
CE0500E4D
CE0750E4D

327.
357.
630.

Primary: 200/220/440, 208/230/460, 240/480
Secondary: 23/110, 24/115, 25/120

9

50
75
100

2-7/8
3-3/16
3-3/16

3-3/8
3-3/4
3-3/4

3-1/4
3-5/8
4-3/8

4.2
5.9
7.9

65
81
81

86
95
95

83
92
111

1.9
2.7
3.6

7
7
7

CE0050E5E
CE0075E5E
CE0100E5E

133.
147.
165.

150
200
250

3-13/16
3-13/16
3-13/16

4-1/2
4-1/2
4-1/2

4-1/4
5
5-1/2

10.0
12.8
15.2

97
97
97

114
114
114

108
127
140

4.5
5.8
6.9

7
7
7

CE0150E5E
CE0200E5E
CE0250E5E

201.
214.
278.

300
350
500

4-3/4
4-3/4
4-3/4

5-1/4
5-1/4
5-1/4

5-3/8
5-1/2
7-1/4

16.8
19.2
27.0

121
121
121

133
133
133

137
140
184

7.6
8.7
12.3

7
7
7

CE0300E5E
CE0350E5E
CE0500E5E

300.
339.
375.




See Pages 9-111 and 9-112 for Wiring Diagrams.

Note: Transformers are designed to operate in a maximum ambient of 40°C.
Contact your local Cutler-Hammer sales office for availability on additional CE Marked control transformers.

For other ratings or styles not shown, refer
to Eaton’s Cutler-Hammer business.







For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

Transformers
Industrial Control Transformers

9-115

November 2003

CE Marked

Vol. 1, Ref. No. [0415]

Factory Mounted Finger-Safe Terminal Covers

Terminal Type A

Terminal Type B

Terminal Type C

Table 9-133. Type MTK CE Marked with Factory Mounted Finger-Safe Terminal Covers IP20
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Terminal
Type

Wiring
Style
Diagram 
 Number

Price
U.S. $

Primary: 240 x 480, 230 x 460, 220 x 440 with Jumpers
Secondary: 120/115/110
250
300
350
500

4
4
4
4

4-1/2
4-1/2
4-1/2
4-1/2

4-5/16
4-7/8
5-3/16
5-5/8

8.8
11.0
11.2
14.8

102
102
102
102

114
114
114
114

110
124
132
143

4.0
5.0
5.1
6.7

A
A
A
A

1
1
1
1

CE0250K2AFS
CE0300K2AFS
CE0350K2AFS
CE0500K2AFS

206.
218.
227.
234.

750
1000
1500

4-1/2
5-5/16
7-1/2

5-1/4
6-3/8
6-3/4

5-15/16
5-5/16
6-1/8

18.0
26.3
40.0

114
135
191

133
162
172

151
135
156

8.2
11.9
18.1

A
A
C

1
1
1

CE0750K2AFS
CE1000K2AFS
CE1500K2AFS

320.
497.
686.

2000
3000
5000

7-1/2
9-3/8
9-3/8

6-3/4
9
9

6-7/16
6-1/4
8-3/4

45.1
65.2
104.8

191
238
238

172
229
229

164
159
222

20.5
29.6
47.5

C
C
C

1
1
1

CE2000K2AFS
CE3000K2AFS
CE5000K2AFS

753.
1,115.
1,595.

Primary: 240 x 480 with Jumpers
Secondary: 24
250
300
350

5-5/8
5-5/8
5-5/8

4-1/2
4-1/2
4-1/2

3-1/4
3-5/8
4-3/16

8.2
9.5
12.2

143
143
143

114
114
114

83
92
106

3.7
4.3
5.5

C
C
C

2
2
2

CE0250K2BFS
CE0300K2BFS
CE0350K2BFS

260.
276.
293.

500
750
1000

5-5/8
6-1/2
7-3/16

4-1/2
5-1/4
6-3/8

4-11/16
5-15/16
5-9/16

14.4
19.5
26.2

143
165
183

114
133
162

119
151
141

6.5
8.9
11.9

C
C
C

2
2
2

CE0500K2BFS
CE0750K2BFS
CE1000K2BFS

313.
368.
543.

Primary: 120 x 240 with Jumpers
Secondary: 24
250
300
350

5-5/8
5-5/8
5-5/8

4-1/2
4-1/2
4-1/2

3-1/4
3-5/8
4-3/16

8.3
9.3
12.0

143
143
143

114
114
114

83
92
106

3.8
4.2
5.4

C
C
C

3
3
3

CE0250K1BFS
CE0300K1BFS
CE0350K1BFS

260.
276.
293.

500
750
1000

5-5/8
6-1/2
7-3/16

4-1/2
5-1/4
6-3/8

4-13/16
5-15/16
5-9/16

14.4
19.5
25.2

143
165
183

114
133
162

122
151
141

6.5
8.9
11.4

C
C
C

3
3
3

CE0500K1BFS
CE0750K1BFS
CE1000K1BFS

313.
368.
543.

Primary: 200/220/440, 208/230/460, 240/480
Secondary: 23/110, 24/115, 25/120
250
300
350

3-7/8
3-7/8
3-7/8

4-1/2
4-1/2
4-1/2

4-7/16
4-3/4
5-3/16

12.5
14.0
15.3

98
98
98

114
114
114

113
121
140

5.7
6.3
6.9

B
B
B

7
7
7

CE0250K5EFS
CE0300K5EFS
CE0350K5EFS

267.
287.
328.

500
750
1000

5-1/16
7-3/16
7-3/16

5-1/4
6-3/8
6-3/8

6-1/4
5-13/16
6-3/16

20.8
29.8
30.2

129
183
183

133
162
162

159
148
157

9.4
13.5
13.7

B
C
C

7
7
7

CE0500K5EFS
CE0750K5EFS
CE1000K5EFS

345.
595.
665.

Primary: 220/380/440/550, 230/400/460/575, 240/416/480/600
Secondary: 23/110, 24/115, 25/120
250
300
350

3 7/8
3-7/8
4-7/16

4 1/2
4-1/2
5-1/4

5 3/8
5-11/16
5-1/2

14.3
15.8
16.5

98
98
113

114
114
133

137
144
140

6.5
7.2
7.5

B
B
B

14
14
14

CE0250K2UFS
CE0300K2UFS
CE0350K2UFS

400.
413.
452.

500
750
1000

5-1/16
7-3/16
7-3/16

5-1/4
6-3/8
6-3/8

6-3/16
5-11/16
6-7/8

20.5
28.8
39.4

129
183
183

133
162
162

157
144
175

9.3
13.1
17.9

B
C
C

14
14
14

CE0500K2UFS
CE0750K2UFS
CE1000K2UFS

539.
606.
693.




See Pages 9-111 and 9-112 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.
Contact your local Cutler-Hammer sales office for availability on additional CE Marked control transformers.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
Industrial Control Transformers

9-116

November 2003

CE Marked

Vol. 1, Ref. No. [0416]

Table 9-134. Type MTK CE Marked with Factory Mounted Finger-Safe Terminal Covers IP20
VA

Dimensions (Inches)
Height

Width

Depth

Weight
Lbs.

Dimensions (mm)
Height

Width

Depth

Weight
kg

Terminal
Type

Wiring
Style
Diagram 
 Number

Pricing
U.S. $

Primary: 208/230/400/460/575
Secondary: 24 /115/230
250
300
350
500

3-7/8
3-7/8
4-7/16
4-7/16

4-1/2
4-1/2
5-1/4
5-1/4

5-1/2
6-1/16
5-3/4
7-5/16

14.9
17.4
17.8
26.6

98
98
113
113

114
114
133
133

140
154
146
186

6.8
7.9
8.1
12.1

B
B
B
B

15
15
15
15

CE0250K2VFS
CE0300K2VFS
CE0350K2VFS
CE0500K2VFS

424.
452.
487.
546.

750
1000
1500

5-15/16
7-1/2
7-1/2

6-3/8
6-3/4
6-3/4

6-3/16
6-7/8
6-3/4

32.5
44.0
45.4

151
191
191

162
172
172

157
175
172

14.7
20.0
20.6

B
C
C

15
15
16

CE0750K2VFS
CE1000K2VFS
CE1500K2WFS

753.
840.
865.

2000
3000
5000

9-3/8
9-3/8
9-3/8

9
9
9

6-1/4
8-1/8
9-15/16

58.6
92.9
127.4

238
238
238

229
229
229

159
206
252

26.6
42.1
57.8

C
C
C

16
16
16

CE2000K2WFS
CE3000K2WFS
CE5000K2WFS

1,020.
1,295.
1,585.

Primary: 240/416/480/600, 230/400/460/575, 220/380/440/550, 208/500
Secondary: 99/120/130, 95/115/125, 91/110/120, 85/100/110
250
300
350

4
4
4

4-1/2
4-1/2
4-1/2

5-1/16
5-1/2
5-1/2

11.4
13.6
14.2

102
102
102

114
114
114

135
140
140

5.2
6.2
6.4

A
A
A

8
8
8

CE0250K6UFS
CE0300K6UFS
CE0350K6UFS

410.
424.
455.

500
750
1000

4-1/2
4-1/2
5-1/4

5-1/4
5-1/4
6-3/8

5-5/8
5-5/8
6-1/16

17.4
27.5
27.9

114
114
133

133
133
162

143
187
154

7.9
12.5
12.6

A
A
A

8
8
8

CE0500K6UFS
CE0750K6UFS
CE1000K6UFS

539.
634.
711.

1500
2000
3000

5-13/16
7-5/8
8-1/4

6-3/4
9
9

6-5/16
5-3/4
6-9/16

43.1
56.0
76.2

148
194
210

172
229
229

160
146
167

19.5
25.4
34.6

A
B
B

8
8
8

CE1500K6UFS
CE2000K6UFS
CE3000K6UFS

847.
991.
1,265.

9





See Pages 9-111 and 9-112 for Wiring Diagrams.
24 volt secondary only available through 1000 VA.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.
Contact your local Cutler-Hammer sales office for availability on additional CE Marked control transformers.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-117

November 2003

CE Marked

Vol. 1, Ref. No. [0417]

Table 9-135. Acceptable Rating of Primary Overcurrent Protection for CE Marked Control Transformers
Fuses 10 x 38 mm (13/32” x 1-1/2”) Time-lag (IEC 269)
Sec. Voltage 50

75

100

150

200

250

300

350

500

750

115
120
200

2.0
2.0
1.0

2.0
2.0
2.0

4.0
4.0
2.0

4.0
4.0
4.0

6.0
6.0
4.0

6.0
6.0
4.0

8.0
8.0
4.0

10.0
10.0
6.0

12.0
12.0
8.0

20.0
20.0
12.0

208
220
230

1.0
1.0
1.0

2.0
1.0
1.0

2.0
2.0
2.0

4.0
4.0
4.0

4.0
4.0
4.0

4.0
4.0
4.0

4.0
4.0
4.0

6.0
6.0
6.0

8.0
6.0
6.0

12.0
10.0
10.0

240
277
380

1.0
.5
.5

1.0
1.0
1.0

2.0
1.0
1.0

4.0
2.0
2.0

4.0
4.0
2.0

4.0
4.0
4.0

4.0
4.0
4.0

4.0
4.0
4.0

6.0
6.0
6.0

10.0
8.0
6.0

400
415
440

.5
.5
.5

.5
.5
.5

1.0
1.0
1.0

2.0
1.0
1.0

2.0
2.0
2.0

4.0
4.0
2.0

4.0
4.0
4.0

4.0
4.0
4.0

4.0
4.0
4.0

6.0
6.0
6.0

460
480
550

.5
.5
.5

.5
.5
.5

1.0
.5
.5

1.0
1.0
1.0

2.0
2.0
1.0

2.0
2.0
2.0

4.0
4.0
2.0

4.0
4.0
4.0

4.0
4.0
4.0

6.0
6.0
4.0

575
600

.5
.5

.5
.5

.5
.5

1.0
1.0

1.0
2.0

2.0
2.0

2.0
2.0

4.0
4.0

4.0
4.0

4.0
4.0

Table 9-136. Acceptable Maximum Rating of Secondary Overcurrent Protection
Miniature Fuses 5 x 20 mm Time-lag (IEC 127-2/III)
Sec. Voltage 50

75

100

150

200

250

300

350

500

750

23
24
25

2.50
2.50
2.50

4.00
4.00
4.00

5.00
5.00
5.00

8.00
8.00
8.00

10.0
10.0
10.0

12.00
12.00
12.00

16.00
16.00
16.00

16.00
16.00
16.00

25.00
25.00
25.00

—
32.00
32.00

90
95
100

.63
.63
.50

1.00
.80
.80

1.25
1.25
1.00

2.00
1.60
1.60

2.50
2.50
2.00

3.15
3.15
2.50

4.00
4.00
3.15

4.00
4.00
4.00

6.30
6.30
5.00

10.00
8.00
8.00

110
115
120

.50
.50
.50

.80
.80
.63

1.00
1.00
1.00

1.60
1.60
1.25

2.00
2.00
2.00

2.50
2.50
2.50

3.15
3.15
2.50

4.00
3.15
3.15

5.00
5.00
5.00

8.00
8.00
6.30

220
230
240

.25
.25
.25

.40
.40
.315

.50
.50
.50

.80
.80
.63

1.00
1.00
1.00

1.25
1.25
1.25

1.60
1.60
1.25

1.60
1.60
1.60

2.50
2.50
2.50

4.00
4.00
3.15

Note: For values over 6.3A use 10 x 38 mm time-lag (IEC - 269-3-1). Ta = 40°C Control Type

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
Industrial Control Transformers

9-118

November 2003

Type AP

Type AP

Vol. 1, Ref. No. [0418]

Standards and Certifications
Industry Standards
All Cutler-Hammer dry-type distribution
and control transformers by Eaton
Corporation are built and tested in
accordance with applicable NEMA,
ANSI, and IEEE Standards.

Type AP Transformer

9

Product Description
■

Sand and resin encapsulated
designs.

Application Description
Transformers provide stepped down
voltages to machine tool control
devices enabling control circuits to be
isolated from all power and lighting
circuits. This allows the use of
grounded or ungrounded circuits that
are independent of the power or lighting grounds; greater safety is afforded
the operator. The control transformer
line is particularly adaptable on applications where compact construction
is demanded.

Features, Benefits
and Functions
■
■
■
■
■
■
■
■

UL recognized.
Resin encapsulated.
60 Hz operation.
115°C winding rise.
Convenient screw-type terminal
board.
Bottom or side/wall mounting
designs.
Performance meets/exceeds
requirements of ANSI/NEMA ST-1.
Regulation exceeds ANSI/NEMA
requirements for all ratings.







Sound Levels
All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 levels.

Winding Terminations

Product Specifications

Cutler-Hammer business recommends
external cables be rated 90ºC (sized
at 75°C ampacity) for encapsulated
designs.

Overload Capability

Series-Multiple Windings

Short-term overload is designed into
transformers as required by ANSI.
dry-type distribution transformers
will deliver 200% nameplate load for
one-half hour; 150% load for one-hour;
and 125% load for four-hours without
being damaged provided that a constant 50% load precedes and follows
the overload. See ANSI C57.96-01.250
for additional limitations.

Series-multiple windings consist of
2 similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with
an “X” or “/” between the voltage
ratings, such as voltages of “120/240”
or “240 X 480.” If the series-multiple
winding is designated by an “X,” the
winding can be connected only for a
series or parallel. With the “/” designation, a mid-point also becomes available in addition to the series or parallel
connection. As an example, a 120 X
240 winding can be connected for
either 120 (parallel) or 240 (series), but
a 120/240 winding can be connected
for 120 (parallel), or 240 (series), or 240
with a 120 mid-point.

Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Insulation System and Temperature Rise
Industry standards classify insulation
systems and rise as shown below:
Table 9-137. Insulation System Classification
Ambient

+
Winding
Rise

+
Hot
Spot

=
Temp.
Class

40°C
40°C
40°C
40°C

55°C
80°C
115°C
150°C

10°C
30°C
30°C
30°C

105°C
150°C
185°C
220°C

Technical Data
and Specifications
Please refer to Page 9-122.

The design life of transformers having
different insulation systems is the
same — the lower temperature systems
are designed for the same life as the
higher temperature systems.

For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
Industrial Control Transformers

9-119

November 2003

Type AP

Vol. 1, Ref. No. [0419]

Product Selection
Additional Product Selection information begins on Page 9-136.
Table 9-138. Type AP
kVA

Mounting Dimensions (Inches)
Height

Width

Depth

Weight Dimensions (mm)
Lbs.
Height
Width

Depth

Weight
kg

Frame Wiring
Style
Diagram 
 Number

Price
U.S. $

240/480 Volts to 120/240 Volts, 60 Hz
3
5
7.5
10
15

Bottom
Bottom
Bottom
Bottom
Bottom

8-5/16
10-3/4
10-3/4
10-3/4
12

9-9/16
10-3/4
10-3/4
10-3/4
13-3/16

8-13/16
8 -11/16
10-3/16
11-3/8
10-7/16

65
104
129
148
197

227
273
273
273
305

243
273
273
273
335

224
221
259
289
265

29.5
47.2
58.6
67.2
89.4

FR133
FR99
FR100
FR101
FR134

5
5
5
5
5

C0003P7GB
C0005P7GB
C0007P7GB
C0010P7GB
C0015P7GB

1,375.
1,710.
2,350.
2,930.
3,970.

3
5
7.5
10
15

Side/Wall
Side/Wall
Side/Wall
Side/Wall
Side/Wall

9-3/4
11-5/8
11-5/8
11-5/8
12-7/8

8-13/16
8-11/16
10-13/16
11-3/8
10-7/16

9-9/16
10-3/4
10-3/4
10-3/4
13-3/16

65
104
129
148
197

248
295
295
295
327

224
221
275
289
265

243
273
273
273
335

29.5
47.2
58.6
67.2
89.4

FR292
FR256
FR257
FR258
FR259

5
5
5
5
5

C0003P7GS
C0005P7GS
C0007P7GS
C0010P7GS
C0015P7GS

1,375.
1,710.
2,350.
2,930.
3,970.




See Page 9-91 for Wiring Diagrams.

9

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

For other ratings or styles not shown, or for
special enclosure types (including stainless
steel) refer to Eaton’s Cutler-Hammer business.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1







Transformers
General Purpose & Industrial Control Transformers

9-120

November 2003

Options, Accessories and Parts

Vol. 1, Ref. No. [0420]

Options and Accessories

Terminal Extension Kit

(Order Separately)
Weathershield Kit
Note: For 316 grade stainless steel add the
suffix ‘S’ to the catalog number.

Wall Mounting Bracket

A terminal extension kit is used to
allow front access to the rear terminals
on most 500 and 750 kVA transformers
(transformers on frames 919 and 920)
when insufficient space is available at
the rear of the transformer. Eaton’s
Cutler-Hammer business recommends
a minimum of 6-inch clearance from
the wall to maintain proper ventilation.
Table 9-140. Terminal Extension Kit
Fits Frame  Bus
Size(s)
Material

9

Catalog
Number

Price
U.S. $

919

Aluminum EXT55AL

500.

919

Copper

EXT55CU

750.

920

Aluminum EXT77AL

500.

920

Copper

750.



EXT77CU

Effective June 1, 2001 frame numbers will
have a prefix of FR, i.e., FR819. Dimensions,
accessories, etc. are still applicable as if the
FR did not exist.

Weathershield Kit

Wall mounting brackets fit the
following frames.

A weathershield kit consisting of a
front and rear cover shield must be
installed on all ventilated dry-type distribution transformers when the unit is
located outdoors. The shields protect
the transformer top ventilation openings against rain but allow for proper
ventilation. Field installation hardware
is not required. Refer to specific transformer listing for selection of weathershield kit. Proper installation provides
a NEMA 3R rating.

Table 9-141. Availability Guide —
Wall Mounting Bracket WMB01
Frame 
Sizes

Catalog  Price
Number
U.S. $

809, 810, 811, 816, 817, 818

WS11

350.

814

WS13

800.

819, 820

WS16

800.

808, 909, 910, 911, 912,
910A, 911A, 912A

WS31

350.

812, 813, 913A, 913B, 914A, WS33
915A, 916, 914B, 915B

350.

916A

WS19

350.

917, 918, 918A

WS34

800.

919, 920

WS35

1,360.

922

WS36

1,360.

815

WS15

350.00






Catalog
Number

Price
U.S. $

Type DS-3 (Single-Phase Compatible)
809, 810, 811, 812, 813, 815, WMB01
816, 817, 818, 819, 820, 835,
836, 837, 814A

275.

Type DT-3, K-Factor, Drive Isolation
(Three-Phase Compatible)
909, 910, 911, 912, 910A,
911A, 912A, 913A, 913B,
914A, 914B, 915A, 915B

Table 9-139. Weathershield Kit
Fits Frame 

Size(s)

Wall Mounting Bracket

Wall mounting brackets are used to
wall mount most 15 through 75 kVA
and some 100 and 112.5 kVA Type
DS-3 and DT-3 transformers. See
availability guide. This bracket allows
for 6-inch clearance from the wall as
recommended by the Cutler-Hammer
business.



WMB01

275.

Effective June 1, 2001 frame numbers will
have a prefix of FR, i.e., FR819. Dimensions,
accessories, etc. are still applicable as if the
FR did not exist.

Effective June 1, 2001 frame numbers will
have a prefix of FR, i.e., FR819. Dimensions,
accessories, etc. are still applicable as if the
FR did not exist.
For stainless steel weathershields, add the
suffix “S” to a catalog number, i.e., WS31S.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1








For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-121

November 2003

Options, Accessories and Parts

Vol. 1, Ref. No. [0421]

Table 9-142. Terminal Lug Kits for Type DT-3 Transformers
Typical
Sizing

Terminal Lugs
Cable Range

Hardware
Quantity

15 – 37.5 kVA Single-Phase
15 – 45 kVA Three-Phase

#14 – #2
#6 – 250 kcmil

8
4

50 – 75 kVA Single-Phase
75 – 112.5 kVA Three-Phase

#6 – 250 kcmil

100 – 167 kVA Single-Phase
150 – 300 kVA Three-Phase
500 kVA Three-Phase

Bolt Size

Price
U.S. $

1/4-20 x 3/4

8

LKS1

95.

12

1/4-20 x 3/4
1/4-20 x 1-3/4

8
8

LKS2

190.

#6 – 250 kcmil
#2 – 600 kcmil

3
22

1/4-20 x 3/4
3/8-16 x 2

3
16

LKS3

740.

#2 – 600 kcmil

29

3/8-16 x 2

18

LKS4

900.

Table 9-144. Replacement Parts for Mini-Power Centers

Table 9-143. Rodent Screens
Description

Frame
Size(s) 


Catalog
Number

Rodent screens are used to
discourage entry by birds
or rodents

909
910A, 911, 912
913B, 914B, 915B

RS01
RS02
RS03

350.
350.
350.

916
917, 918, 918A
919, 920
916A
922

RS04
RS05
RS06
RS07
RS08




Catalog
Number

Quantity

Price
U.S. $

Frame

Deadfront Cover
(Breaker Cover)

Front Cover

800.
800.
1,360.
800.
1,360.

283
284
285
286
287

47-37503
47-37503-2
47-37503-3
47-37503-4
47-37503-5

7074C98H04
7074C98H01
7074C98H02
7074C98H02
7074C98H03

289
290
291

47-37459
47-37459-2
47-37459-3

7074C44H01
7074C44H02
7074C44H03

Effective June 1, 2001 frame numbers will have a prefix of FR, i.e.
FR819. Dimensions, accessories, etc. are still applicable as if the FR did
not exist.

289A
290A
291A

47-42072-1
47-42072-2
47-42072-3

7074C44H01
7074C44H02
7074C44H03

Table 9-145. Case Parts for Ventilated Units
Frame(s) 

Panels

Top Cover

Front or Back

Side (2 required per transformer)

Bottom

Part Number

Part Number

Three-Phase, 600 Volt Class
909
910, 911, 912
913A, 914A, 915A
916
917, 918

7073C37P01
1714C46P01
1714C47P03
1714C60P01
1714C65P01

1714C44P03
1714C44P01
1714C44P07
1714C56P01
1714C64P01

7073C20P05
7073C20P01
7073C20P02
7073C20P03
7073C20P04

1714C45P01
1714C45P01
1714C45P02
1714C58P01
1714C67P01

919, 920

2D46331P03 (Upper Panel)
2D46331P04 (Lower Panel)

2D46332P01
2D46331P01 (Cutout Cover Plate)

—
—

2D46331P02

922

2D46391H03 (Back Upper Panel)
2D46391H06 (Front Upper Panel)
2D46391H08 (Lower Panel)

2D46392H01

—
—
—

2D46391H02

918A

47-41801

47-41800

47-41799

47-41802

910A, 911A, 912A
913B, 914B, 915B
916A

47-40592
47-40580
47-41790

47-40591
47-40578
47-41789

47-40589
47-41792
47-41788

1714C45P01
1714C45P02
47-41791

809
810, 811, 835
812, 813, 836, 837, 838
814

7073C16P03
7073C16P01
7073C16P02
7073C54P01

7073C18P04
7073C18P01
7073C18P02
7073C18P05

7073C14P03
7073C14P01
7073C14P02
7073C14P04

7073C17P01
7073C17P01
7073C17P02
7073C17P03

815
816
817, 818
819, 820

47-39433
47-40452
47-40457
47-40574

47-39430
47-40451
47-40456
47-40573

47-39429
47-40449
47-40454
47-40459

47-39431
47-40453
47-40458
47-40575

Single-Phase, 600 Volt Class



Effective June 1, 2001 frame numbers will have a prefix of FR, i.e., FR819. Dimensions, accessories, etc. are still applicable as if the FR did not exist.

Note: Parts listed are for standard catalog listed transformers. Units with modifications may require different parts.
(Frame No. from transformer nameplate required).
Note: Transformer nameplate and UL label are not field replaceable.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1
CA08101001E

For more information visit: www.cutler-hammer.eaton.com








9

9-122

Transformers
General Purpose & Industrial Control Transformers
November 2003

Technical Data and Specifications

Technical Data
and Specifications

Vol. 1, Ref. No. [0422]

General Purpose — DS-3 Ventilated

Non-Linear (K-factor)

General Purpose — EP
Sand and Resin Encapsulated

9
EP Sand and Resin Encapsulated

Cutler-Hammer EP general purpose
transformers by Eaton Corporation are
single-phase, sand and resin encapsulated designs suitable for indoor or
outdoor applications. The totallyenclosed non-ventilated NEMA 3R
enclosure makes it ideally suited for
use in areas that contain dust, moisture, or corrosive fumes. Available in
ratings through 37.5 kVA and 4160
volts, type EP transformers can be
mounted in any position for indoor
installations and in upright positions
only for outdoor installations. Type EP
transformers utilize a 185°C insulation
system with 115°C rise standard.

DS-3 Ventilated

Non-Linear Transformer

DS-3 general purpose transformers are
single-phase ventilated units designed
primarily for indoor locations (also for
outdoor with the addition of weathershields). The DS-3 utilizes a 220°C
insulation system with 150°C rise and
is available in ratings of 15 – 167 kVA
and up to 4160 volts primary.

Non-linear transformers are designed
to withstand the overheating effects
caused by harmonics resulting from
non-linear (non-sinusoidal) loads.
Office equipment using solid-state
switching power supplies such as
computers, laser printers, and copiers
are sources of harmonic distortion in
power systems. Non-linear transformers
are specifically designed for these
applications. Their coils are designed
to reduce stray losses, their cores have
reduced induction levels, and their
neutrals can carry at least 200% of
normal phase current.

General Purpose — DT-3 Ventilated

Energy Efficient

General Purpose — EPT
Sand and Resin Encapsulated
Three-Phase DT-3 Ventilated

The three-phase DT-3 ventilated
dry-type is available in ratings of
15 – 1500 kVA and up to 4160 volts. Its
220°C insulation system (150°C rise)
is self-extinguishing. DT-3 enclosures
are designed for indoor locations
(or outdoors on 600 volts and below
with addition of weathershields).

EPT Sand and Resin Encapsulated

Type EPT sand and resin encapsulated,
3-phase transformers are available in
ratings of 3 – 75 kVA, up to 4160 volts
primary. The totally-enclosed non-ventilated NEMA 3R enclosure makes the
EPT ideally suited for outdoor as well
as indoor locations. Type EPT transformers utilize a 185°C insulation
system with 115°C standard.







NEMA TP-1-1996 — Energy Efficient

Cutler-Hammer low temperature rise
units are a solution for improved
energy efficiency. Their lower conductor
losses result in energy conservation
and their lower rise give longer insulation life. Available in ratings through
1000 kVA, 115°C or 80°C rise, all CutlerHammer energy efficient units through
750 kVA are UL listed and utilize the
220°C insulation system.
NEMA TP-1-1996 Energy Efficient
transformers are specifically designed
to meet the strict efficiency standards
set forth in NEMA Standard TP-1-1996.
Cores and coils are optimized to provide maximum efficiency at 35% of
nameplate rating.

For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-123

November 2003
Vol. 1, Ref. No. [0423]

Shielded Isolation

Technical Data and Specifications

Mini-Power Center

Customer-Furnished Connecting Cables
Eaton’s Cutler-Hammer recommends
external cables be rated 90°C (sized at
75°C ampacity) for encapsulated
designs and 75°C for ventilated
designs. Primary and secondary terminal lugs are not included. Lug kits are
available separately.

Overload Capability

Shielded Isolation Transformer

“Sensitive” loads such as input circuits
of computers, hospital operating
rooms, microprocessors, require
additional protection from electrical
disturbances. The Cutler-Hammer
Shielded Isolation transformer by
Eaton Corporation uses an electrostatic shield grounded to the transformer case to attenuate electrical
disturbances on the line from being
transmitted to the load. Shielded Isolation units are similar in design and
ratings to the EP, EPT, DS-3, and DT-3.

ac Adjustable Frequency Drive
and dc Motor Drive Isolation

Mini-Power Center

The Mini-Power Center replaces 3 individual components — a main breaker,
transformer, and panelboard — by
combining all 3 into one unit. All interconnecting wiring is performed at the
factory. Eaton’s Cutler-Hammer
Mini-Power Centers are available with
primary main breakers rated up to 600
volts, 100 amperes; encapsulated EP
or EPT transformers through 30 kVA;
and secondary panelboards with main
breakers and provisions for up to 24
one-pole feeder breakers. NEMA 3R
enclosure is standard.

Buck-Boost Transformer

Short-term overload capacity is
designed into transformers as required
by ANSI. dry-type distribution transformers will deliver 200% nameplate
load for one-half hour; 150% load for
one hour; and 125% load for four
hours without being damaged provided that a constant 50% load precedes and follows the overload. See
ANSI C57.96-01.250 for additional
limitations.
Continuous overload capacity is not
deliberately designed into a transformer because the design objective is
to be within the allowed winding temperature rise with nameplate loading.

Seismically Qualified
Eaton’s Cutler-Hammer manufactured
dry-type distribution transformers are
seismically qualified, and exceed
requirements of the Uniform Building
Code (UBC) and California Code Title 24.

Taps
Primary taps are available in most
ratings to allow compensation for
source voltage variations.

Series-Multiple Windings

Drive Isolation Transformer

Drive Isolation transformers are
designed especially for 3-phase SCR
controlled, variable speed motor
drives. Sized by hp and common
motor voltages, the Drive Isolation
transformer is braced to withstand the
mechanical stresses associated with a
motor drive. Drive Isolation units are
available in ventilated designs (150°C
rise) 5 – 800+ hp (through 1500 kVA).
Epoxy encapsulated designs (115°C
rise) are available in 5 – 20 hp designs
by custom order.

CA08101001E

Buck-Boost Transformer

Buck-Boost transformers have 120 x 240
or 240 x 480 volt primaries with 12/24,
16/32, or 24/48 volt secondaries. Their
primary use is as auto-transformers for
slight upward (“boost”) or downward
(“buck”) adjustments in voltages.
Eaton’s Cutler-Hammer Buck-Boost
transformers are encapsulated designs
with totally-enclosed non-ventilated
enclosures. Units are 1-phase, but can
be installed as a 3-phase bank.

For more information visit: www.cutler-hammer.eaton.com

Series-multiple windings consist of 2
similar coils in each winding which
can be connected in series or parallel
(multiple). Transformers with seriesmultiple windings are designated with a
“X” or “/” between the voltage ratings,
such as voltages of “120/240” or “240
x 480.” If the series-multiple winding is
designated by an “X,” the winding can
be connected only for a series or parallel.
With the “/” designation, a midpoint
also becomes available in addition to
the series or parallel connection. As an
example, a 120 x 240 winding can be
connected for either 120 (parallel) OR
240 (series), but a 120/240 winding can
be connected for 120 (parallel), or 240
(series), or 240 with a 120 midpoint.







9

9-124

Transformers
General Purpose & Industrial Control Transformers
November 2003

Technical Data and Specifications
Enclosures

Non-Linear Ratings

Eaton’s Cutler-Hammer ventilated
transformers, Types DS-3, DT-3, MD,
and KT, utilize a NEMA 2 rated (dripproof) enclosure as standard, and are
rated NEMA 3R with the addition of
weathershields. Cutler-Hammer
encapsulated (Types EP, EPT, EPZ,
and EPTZ) and totally enclosed,
non-ventilated (Types DS-3E and
DT-3E) transformers utilize a NEMA
3R rated enclosure.

The transformers shall be specifically
designed to supply circuits with a
harmonic profile equal to or less than
a K-factor of 4 or 13 as described
below without exceeding specified
temperature rise.

Buck-Boost Transformers

9

Vol. 1, Ref. No. [0424]

An autotransformer has only one
winding, and is therefore smaller and
more economical than the conventional
two-winding transformer. In an
autotransformer, the primary and secondary are electrically and mechanically connected together. The required
secondary voltage is obtained by
“tapping-off” from the single winding.
Buck-Boost autotransformers are insulated units with 120 x 240 or 240 x 480
volt primaries and 12/24, 16/32, or 24/48
volt secondaries and provide a very
economical method for minor voltage
adjustments where circuit isolation is
not needed.
Autotransformers can be used only
where local electrical codes permit
and isolation of the two circuits is
not required.

Table 9-146. Non-Linear Ratings
Harmonic

K-4

K-13

Fundamental
3rd
5th
7th
9th

100.0%
34.0%
22.0%
3.0%
1.0%

100.0%
70.0%
42.0%
5.0%
3.0%

.7%
.5%
.3%
.3%

3.0%
1.0%
.7%
.6%

11th
13th
15th
17th

Sound Levels
All Cutler-Hammer 600 volt class general purpose dry-type distribution
transformers are designed to meet
NEMA ST-20 sound levels listed here.
These are the sound levels measured
in a soundproof environment. Actual
sound levels measured at an installation will likely be higher due to electrical connections and environmental
conditions. Lower sound levels are
available and should be specified
when the transformer is going to be
installed in an area where sound may
be a concern.
Table 9-147. Average Sound Levels

All Cutler-Hammer general purpose
dry-type distribution transformers are
designed with sound levels lower than
NEMA ST-20 maximum levels. However,
consideration should be given to the
specific location of the transformers
and their installation to minimize the
potential for sound transmission to
surrounding structures and sound reflection. It is suggested that the following installation methods be included:
1. If possible, mount the transformer
away from corners of wall or
ceilings. For installation which
must be near a corner, use soundabsorbing materials on the walls
and ceilings if necessary to
eliminate reflection.
2. Provide a solid foundation for
mounting the transformer and
then use vibration dampening
mounts if not already provided in
the transformer (Cutler-Hammer
encapsulated EP/EPT designs utilize a special encapsulation system and ventilated DS/DT-3
designs contain a built-in vibration
dampening system to minimize
and isolate sound transmission).
3. Provide flexible conduit to make the
connections to the transformer.
4. Locate the transformer as far as
possible from areas where high
sound levels are undesirable.

NEMA ST-20 Average Sound Level (dB)
kVA







Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-125

November 2003

Technical Data and Specifications

Vol. 1, Ref. No. [0425]

Table 9-148. Rated Line Amperes for kVA and Voltages of Single-Phase Transformers
Amperes
for kVA
.25
.50
.75

Voltage
120

208

220

240

277

480

600

2400

4160

2.0
4.2
6.3

1.2
2.4
3.6

1.1
2.3
3.4

1.0
2.1
3.1

.9
1.8
2.7

.5
1.0
1.6

.4
.8
1.3

.10
.21
.31

.06
.12
.18

1
1.5
2

8.3
12.5
16.7

4.8
7.2
9.6

4.5
6.8
9.1

4.2
6.2
8.3

3.6
5.4
7.2

2.1
3.1
4.2

1.7
2.5
3.3

.42
.63
.83

.24
.36
.48

3
5
7.5

25
41
62

14.4
24.0
36

13.6
22.7
34

12.5
20.8
31

10.8
18.0
27

6.2
10.4
15.6

5.0
8.3
12.5

1.2
2.1
3.1

.72
1.2
1.8

20.8
31
52

16.7
25
41

4.2
6.2
10.4

2.4
3.6
6.0

10
15
25

83
125
208

48
72
120

45
68
114

41
62
104

36
54
90

37.5
50
75

312
416
625

180
240
360

170
227
341

156
208
312

135
180
270

78
104
156

62
83
125

15.6
20.8
31.3

9.0
12.0
18.0

833
1391

480
802

455
759

416
695

361
602

208
347

166
278

41.7
69.6

24.0
40.1

100
167

Note: Line Current = (kVA x 1000)/Line Voltage

Table 9-149. Rated Line Amperes for kVA and Voltages of Three-Phase Transformers
Amperes
for kVA

Voltage
208

240

380

480

600

2400

4160

3
6
9

8.3
16.6
25

7.2
14.4
21.6

4.6
9.1
13.7

3.6
7.2
10.8

2.9
5.8
8.6

.72
1.4
2.2

.42
.83
1.2

15
22.5
30

41.7
62.4
83.4

36.1
54.1
72.3

22.8
34.2
45.6

18.0
27.1
36.1

14.4
21.6
28.9

3.6
5.4
7.2

2.1
3.1
4.2

57.0
68.4
76

45.2
54.2
60.1

36.1
43.4
48.1

9.0
10.8
12.0

5.2
6.3
6.9

37.5
45
50

104
124
139

90.3
108
120

75
112.5
150

208
312
416

180
270
360

114
171
228

90
135
180

72
108
144

18.0
27.1
36.1

10.4
15.6
20.8

225
300
500

624
832
1387

541
721
1202

342
456
760

270
360
601

216
288
481

54.2
72.2
120

31.3
41.6
69.4

750
1000

2084
2779

1806
2408

1140
1519

903
1204

723
963

180
241

104
139

Note: Three-Phase Line Current = (kVA x 1000)/(Line Voltage x 1.732)

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
General Purpose & Industrial Control Transformers

9-126

November 2003

Technical Data and Specifications

Vol. 1, Ref. No. [0426]

Typical Dimensions and Technical Data
Table 9-150. Typical Data for 600-Volt Class General Purpose dry-type Transformers 

Type

EP
115°C
Rise

9
EPT 
115°C
Rise

DS-3
150°C
Rise

DT-3
150°C
Rise

kVA

Dimensions (Inches)

Losses in Watts

Efficiency

N.L.

Total

1/4
Load

1/2
Load

3/4
Load

Full
Load

100%
P.F.

80%
P.F.

% Imp.



Sound
Level
dB

7
7
7
8

6
7
5
7

9
14
15
20

65.3
66.0
82.4
83.4

79.6
79.0
86.9
88.2

84.3
82.5
87.7
88.9

85.6
82.8
86.5
87.8

5.9
9.4
10.3
9.0

6.4
9.2
10.6
9.6

6.5
9.8
11.0
9.8

45
45
45
45

12
13
20
30

14
20
29
24

29
47
57
60

79.0
85.1
86.0
90.8

87.2
90.3
91.3
93.9

89.5
91.4
92.7
94.5

89.6
91.4
92.9
94.4

5.9
5.5
3.9
3.8

7.5
7.0
5.0
4.9

7.5
6.9
5.0
4.9

45
45
45
45

65
113
—
—

40
40
69
120

30
30
61
104

90
100
135
215

92.5
94.2
92.0
91.8

94.7
95.7
95.0
95.0

95.0
95.8
95.7
95.8

94.6
95.4
95.7
95.9

4.1
3.6
2.5
2.3

5.2
4.7
3.5
3.3

5.2
4.7
3.5
3.4

45
45
45
45

9-7/8
10-1/2
10-1/2
14-1/8

123
193
216
385

133
208
235
414

129
153
209
191

250
295
435
440

93.2
93.9
94.4
96.8

96.0
96.3
96.6
98.0

96.7
97.0
97.1
98.3

95.9
97.2
97.2
98.4

1.5
1.5
1.6
1.1

2.4
2.5
2.8
2.5

2.5
2.8
3.0
3.1

45
50
50
50

15-15/16
16-1/2
16-1/2
19-11/16

8-5/16
9-7/8
9-7/8
10-7/16

116
143
166
275

123
153
178
300

110
145
195
265

165
275
375
545

87.3
90.9
91.6
93.0

92.6
94.5
95.0
95.7

94.3
95.5
95.9
96.5

94.9
95.7
96.1
96.6

2.1
2.2
2.0
1.9

6.1
3.1
2.8
3.1

7.9
3.7
3.0
3.3

45
45
45
50

26-5/8
26-1/2
30-3/4

25-1/8
28-1/2
30-1/8

12-3/4
14-5/8
15-5/8

422
660
1275

504
745
1450

250
300
400

665
740
945

96.5
97.2
97.7

97.7
98.2
98.6

98.0
98.4
98.8

97.9
98.5
98.8

1.5
1.0
.8

2.5
2.1
1.6

2.7
2.4
1.9

50
50
55

30-1/4
31-1/4
37-5/8
37-5/8

16-7/8
22-5/8
22-5/8
22-5/8

15-7/8
17-1/2
19-1/2
19-1/2

147
212
306
340

165
237
343
381

200
200
250
250

465
790
1160
1595

94.7
97.1
97.4
97.3

96.6
97.7
97.8
97.7

97.1
97.5
97.5
97.4

97.1
97.2
97.2
96.9

1.9
2.5
2.6
2.9

3.4
4.2
4.3
5.7

3.7
4.5
4.6
6.5

45
45
45
45

75
100
167

42-1/8
42-1/8
62-7/8

24
24
30

23-3/8
23-3/8
34

510
560
1200

570
620
1350

350
400
650

2175
2825
3270

97.4
97.8
98.0

97.8
98.0
98.4

97.6
97.7
98.3

97.2
97.3
98.3

2.6
2.7
1.8

5.5
6.0
5.2

6.4
7.3
6.8

50
50
55

15
30
45
75

25
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

152
230
310
480

172
300
370
550

155
250
300
400

665
1795
1685
2535

95.2
95.5
97.2
97.2

96.4
95.9
98.2
97.6

96.3
95.3
98.4
97.2

95.8
94.4
98.5
96.7

3.5
5.3
1.1
3.0

5.2
7.8
3.7
4.8

5.3
7.9
5.0
5.1

45
45
45
50

112.5
150
225
300

39-3/8
46-5/8
56
62-1/4

26-1/8
28
31-1/4
31-1/4

19-1/8
23
24-1/4
30-1/4

600
785
1100
1600

675
870
1200
2150

600
700
900
1100

3830
4430
5795
7065

96.9
97.5
97.9
98.0

97.3
97.8
98.1
98.3

97.0
97.6
97.9
98.1

96.5
97.2
97.5
97.7

3.4
2.7
2.4
2.2

5.8
5.2
5.4
5.3

6.2
5.8
6.4
6.5

50
50
55
55

75
75
76

44-1/2
44-1/2
60

36
36
50

2400
2900
4530

3100
3600
5400

1500
2100

6875
10090

98.6
98.5

98.9
98.9

98.8
98.8

98.7
98.7

1.2
1.3

3.7
4.6

4.9
6.3

60
64
64

15
30
45
75

25
30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
14-1/8
19-1/8

152
230
310
480

172
300
370
550

155
250
300
400

655
1460
1475
2060

95.3
95.7
96.7
97.1

96.4
96.3
97.4
97.7

96.3
95.8
97.2
97.6

95.9
95.0
96.9
97.3

3.4
4.6
2.7
2.3

4.8
6.3
4.1
3.9

4.8
6.4
4.2
4.2

45
45
45
50

112.5
150
225
300

39-3/8
46-5/8
56
62-1/4

26-1/8
28
31-1/4
31-1/4

19-1/8
23
24-1/4
30-1/4

600
785
1100
1600

675
870
1200
2150

600
700
900
1100

3220
4340
5640
5950

97.4
97.5
97.8
98.0

97.8
97.8
98.1
98.2

97.6
97.6
97.9
98.0

97.3
97.2
97.6
97.7

2.5
2.6
2.4
2.2

4.6
5.1
5.8
5.5

5.1
5.8
7.2
6.8

50
50
55
55

500
750

75
76

44-1/2
60

36
50

2400
4530

3100
5400



5955

98.5

98.9

99.0

98.8

5.5

60
64

15
30
45

30-1/8
30-1/8
39-3/8

20-1/8
20-1/8
26-1/8

14-1/8
14-1/8
19-1/8

230
310
480

300
370
550

250
300
400

505
810
1135

93.3
95.8
96.1

95.9
97.2
97.4

96.6
97.5
97.6

96.7
97.4
97.5

1.7
1.8
1.7

2.5
2.7
2.8

2.5
2.7
2.9

45
45
45

75
112.5
150

39-3/8
46-5/8
56

26-1/8
28
31-1/4

19-1/8
23
24-1/4

600
785
1100

675
870
1200

600
700
900

1855
2930
2170

96.5
97.2
97.4

97.6
97.8
98.4

97.7
97.8
98.6

97.6
97.5
98.6

1.8
2.1
.9

3.4
3.9
2.5

3.8
4.3
3.0

50
50
50

225
300
500

62-1/4
75
76

31-1/4
44-1/2
60

30-1/4
36
50

1600
2400
4190

2150
3100
4650

1100
1500

4425
3940

97.7
97.8

98.3
98.6

98.3
98.7

98.1
98.7

1.6
.9

3.9
2.6

4.7
3.3

55
55
60

Width

6-1/2
6-1/2
6-1/2
6-1/2

3-7/8
3-7/8
3-7/8
3-7/8

3-1/2
3-1/2
3-1/2
3-1/2

—
—
—
—

.25
.5
.75
1

6-1/2
6-1/2
8-3/8
8-3/8

4-7/8
4-7/8
6
6

3-7/8
4-5/8
5-1/2
5-1/2

—
—
—
—

1.5
2
3
5

10-1/2
10-1/2
14-1/4
16

6-3/8
6-3/8
71-1/16
10-3/8

6-1/8
6-1/8
8
9-7/8

7.5
10
15
25

16
19
19
22-5/16

10-3/8
13-3/8
13-3/8
16-3/8

3
6
9
15

13-3/8
15-7/8
15-7/8
17-3/8

30
45
75
15
25
37.5
50

.05
.075
.10
.15

500
750
1000
DT-3
115°C
Rise

DT-3
80°C
Rise








Weight Lbs.
Depth  Al

Height

Cu



1500





















% Regulation















1.0







4.0











Typical values for aluminum windings. Contact Eaton’s Cutler-Hammer business for values of copper windings.
For Types DS-3 and DT-3 transformers and all K-factor transformers, allow 6-inch (152.4 mm) clearance between rear of transformer and wall.
Actual impedance may be ± 7.5%.
Type EPT transformers 3-15 kVA are T-T connected.
Refer to the Cutler-Hammer business.

Note: Performance data is based upon 480 volt Delta primary and a 208Y/120 volt secondary for three-phase transformers; 240 x 480 volt
primary and a 120/240 volt secondary for single-phase transformers. All data is subject to future revision.
Note: Refer to the Cutler-Hammer business for 5 kV class information. All data is subject to future revision.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-127

November 2003

Technical Data and Specifications

Vol. 1, Ref. No. [0427]

Typical Dimensions and Technical Data
Table 9-151. Typical Data for 600-Volt Class NEMA TP-1 and Non-linear Transformers 

Type

DT-3
150ºC
Rise
NEMA TP-1

K-4
150°C
Rise

K-4
115°C
Rise

K-4
80°C
Rise

K-13
150°C
Rise

K-13
115°C
Rise

K-13
80°C
Rise







kVA

15
30
45
75
112.5
150
225
300
500
15
30
45
75
112.5
150
225
300
500
15
30
45
75
112.5
150
225
300
500
15
30
45
75
112.5
150
225
300
500
15
30
45
75
112.5
150
225
300
500
15
30
45
75
112.5
150
225
300
500
15
30
45
75
112.5
150
225
300

Dimensions (Inches)
Height Width Depth 

Weight Lbs.
Al
Cu

25
30-1/8
30-1/8
39-3/8
39-3/8
46-1/2
56
62-1/4
75
30-1/8
30-1/8
30-1/8
39-3/8
39-3/8
56
56
75
75
30-1/8
30-1/8
39-3/8
39-3/8
46-5/8
56
62-1/4
75
90
30-1/8
30-1/8
39-3/8
39-3/8
56
56
62-1/4
75

20-1/8
20-1/8
20-1/8
26-1/8
26-1/8
28
31-1/4
31-1/4
44-1/2
20-1/8
20-1/8
20-1/8
26-1/8
26-1/8
31-1/4
31-1/4
44-1/2
44-1/2
20-1/8
20-1/8
26-1/8
26-1/8
28
31-1/4
31-1/4
44-1/2
69
20-1/8
20-1/8
26-1/8
26-1/8
31-1/4
31-1/4
31-1/4
44-1/2

14-1/8
14-1/8
14-1/8
19-1/8
19-1/8
23
24-1/4
30-1/4
36
14-1/8
14-1/8
14-1/8
19-1/8
19-1/8
24-1/4
24-1/4
36
36
14-1/8
14-1/8
19-1/8
19-1/8
23
24-1/4
30-1/4
36
42
14-1/8
14-1/8
19-1/8
19-1/8
24-1/4
24-1/4
30-1/4
36

152
230
310
480
600
800
1250
1600
2400
230
230
310
480
600
1100
1100
2400
2800
230
230
480
600
785
1100
1600
2400
4500
230
310
480
600
1100
1100
1600
2400

172
300
370
550
675
1000
1800
2150
3100
300
300
370
675
675
1200
1200
3100
3600
300
300
575
675
870
1200
2150
3100

30-1/8
30-1/8
39-3/8
39-3/8
46-5/8
56
62-1/4
75
90
30-1/8
30-1/8
39-3/8
39-3/8
46-5/8
56
62-1/4
75
90
30-1/8
30-1/8
39-3/8
46-5/8
56
62-1/4
75
75

20-1/8
20-1/8
26-1/8
26-1/8
28
31-1/4
31-1/4
44-1/2
69
20-1/8
20-1/8
26-1/8
26-1/8
28
31-1/4
31-1/4
44-1/2
69
20-1/8
20-1/8
26-1/8
28
31-1/4
31-1/4
44-1/2
44-1/2

14-1/8
14-1/8
19-1/8
19-1/8
23
24-1/4
30-1/4
36
42
14-1/8
14-1/8
19-1/8
19-1/8
23
24-1/4
30-1/4
36
42
14-1/8
14-1/8
19-1/8
23
24-1/4
30-1/4
36
36

230
310
480
600
785
1100
1600
2400
4500
230
310
480
600
785
1100
1600
2400
4500
230
310
480
785
1100
1600
2400
—

300
370
575
675
870
1200
2150
3100











300
370
575
675
1200
1200
2150
3100




300
370
575
675
870
1200
2150
3100


300
370
575
870
1200
2150
3100
3600

Losses in Watts
N.L.
Total

Efficiency
1/4
1/2
Load Load

3/4
Load

Full
Load

% Regulation
100% 80% % Imp.

P.F.
P.F.

80
100
170
230
360
480
565
730
1350
250
250
300
400
600
900
900
1100
1500
250
250
400
600
700
900
1100
1500
2600
250
300
400
600
900
900
1100
1500

822
1674
1885
2534
3290
3552
6783
7477
8031
1090
1990
2110
2840
3870
5250
7270
8420
9620
950
1840
2090
2360
3760
4260
4620
4980
5360
670
990
1170
2290
2610
3090
4320
5060

98.6
97.3
97.5
98
98
98.2
98.3
98.4
98.5
92.2
95.2
96.3
97.0
97.1
96.8
97.6
97.9
98.5
92.4
95.4
95.8
96.2
96.8
97.0
97.6
97.8
97.7
92.8
95.4
96.0
96.2
96.4
97.2
97.6
97.8

96.3
96.7
97.2
97.7
97.9
98.2
98
98.3
98.7
93.5
95.3
96.5
97.1
97.3
97.1
97.6
97.9
98.8
93.9
95.5
96.7
96.9
97.2
97.4
98.1
98.5
98.4
94.7
96.5
97.0
97.0
97.3
97.8
98.1
98.5

95.4
95.6
96.5
97.1
97.4
97.8
97.5
97.9
98.5
92.9
94.3
95.8
96.6
96.8
96.7
97.1
97.5
98.7
93.5
94.6
96.4
96.7
96.8
97.2
98.0
98.5
98.5
94.7
96.3
97.0
96.8
97.3
97.7
98.0
98.6

94.3
94.4
95.6
96.4
96.9
97.4
96.8
97.3
98.2
91.8
93.0
94.9
95.9
96.2
96.1
96.5
96.9
98.5
92.6
93.5
95.9
96.2
96.2
96.7
97.7
98.4
98.4
94.2
95.9
96.6
96.3
97.0
97.4
97.6
98.6

3.3
3.6
2.7
2.1
2.3
1.6
2.3
1.9
1.4
3.5
3.7
2.6
2.3
2.8
2.2
1.1
1.6
.7
3.3
3.6
1.9
2.1
2.8
1.9
1.4
.8
.7
2.0
1.8
3.1
1.8
1.4
1.4
1.7
.7

4.8
5.1
4.4
4.3
4.6
3.8
6.4
5.7
4.9
5.1
6.0
4.3
4.3
5.5
4.2
4.1
5.6
3.7
4.4
5.7
3.1
3.8
4.9
3.9
4.1
2.4
4.1
3.1
2.7
3.2
3.5
2.9
3.7
4.6
2.4

6.4
7
5.9
5.7
5.9
5.3
8.4
7.6
6.4
5.2
6.3
4.5
4.8
6.2
4.7
5.3
7.7
5.5
4.4
5.9
3.2
4.2
5.4
4.5
5.3
3.0
6.1
3.1
2.8
3.3
3.9
3.3
4.6
5.9
3.2

250
300
400
600
700
900
1100
1500
2600
250
300
400
600
700
900
1100
1500
2600
250
300
400
700
900
1100
1500
2100

900
1370
1730
2270
3370
4270
5080
5310
5625
790
1070
1300
1960
3140
3480
4200
4780
5360
690
990
1120
1800
2210
2350
2470
2860

92.5
95.1
95.7
96.2
96.9
97.0
97.5
97.7
97.7
92.6
95.3
95.9
96.3
96.9
97.1
97.6
97.8
97.7
92.7
95.4
96.0
95.8
96.4
96.8
97.1
97.1

94.1
95.9
96.4
97.0
97.3
97.4
97.9
98.4
98.4
94.4
96.4
96.9
97.2
97.4
97.7
98.1
98.5
98.4
94.7
96.5
97.1
97.0
97.5
97.8
98.2
98.2

93.7
95.5
96.1
96.8
97.0
97.1
97.7
98.4
98.5
94.2
96.1
96.8
97.1
97.2
97.5
98.0
98.5
98.5
94.6
96.3
97.0
97.0
97.5
97.9
98.3
98.4

92.9
94.7
95.5
96.3
96.5
96.7
97.3
98.3
98.4
93.5
95.6
96.4
96.7
96.7
97.2
97.7
98.4
98.4
94.1
95.9
96.7
96.8
97.3
97.8
98.3
98.4

2.5
2.3
2.0
3.5
2.5
1.8
1.7
.9
.6
2.4
1.8
1.6
1.8
1.7
1.5
1.6
.8
.7
2.3
1.8
1.4
1.6
1.1
.9
.6
.7

3.9
3.6
3.1
4.0
4.6
3.8
4.2
2.5
3.3
3.5
2.4
3.0
3.3
3.5
3.8
4.2
2.4
3.3
3.3
2.7
2.7
3.0
2.7
2.6
2.0
2.8

4.1
3.7
3.2
4.0
5.1
4.4
5.2
3.2
4.7
3.6
2.4
3.3
3.6
4.8
4.6
5.3
3.1
4.7
3.4
2.8
3.0
3.3
3.4
3.4
2.5
3.8



















Sound
Level
dB
45
45
45
50
50
50
55
55
60
45
45
45
50
50
55
55
55
60
45
45
45
50
50
50
55
55
60
45
45
45
50
50
50
55
55
60
45
45
45
50
50
50
55
55
60
45
45
45
50
50
50
55
55
60
45
45
45
50
50
50
55
55

Typical values for aluminum windings. Contact Eaton’s Cutler-Hammer business for values of copper windings.
For Type DT-3 transformers and all K Factor transformers, allow 6-inch (152.4 mm) clearance between rear of transformer and wall.
Actual impedance may be ± 7.5%.
Refer to the Cutler-Hammer business.

Note: Performance data is based upon 480 volt Delta primary and a 208Y/120 volt secondary for three-phase transformers; 240 x 480 volt
primary and a 120/240 volt secondary for single-phase transformers. All data is subject to future revision.
Note: Performance Data is based on a 480 delta primary and a 208Y/120 secondary. All data is subject to future revision.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

Transformers
General Purpose & Industrial Control Transformers

9-128

November 2003

Technical Data and Specifications

Vol. 1, Ref. No. [0428]

Typical Specifications —
General Purpose
(1000 kVA and Below)
General
Furnish and install, single-phase and
three-phase general purpose individually mounted dry-type transformers of
the two-winding type, self-cooled, with
ratings and voltages as indicated on
the drawings. Transformers shall be
manufactured by Eaton’s CutlerHammer business.

9

Transformers shall be designed, manufactured, and tested in accordance with
all the latest applicable ANSI, NEMA
and IEEE standards. All 600-volt class
transformers through 1000 kVA shall
be UL listed and bear the UL label.
Transformers shall be designed for
continuous operation at rated kVA,
for 24 hours a day, 365 days a year
operation, with normal life expectancy
as defined in ANSI C57.96.

Insulation Systems
Transformers shall be insulated as
follows:
■

Type EP or EPT:
0.050 through 75 kVA: 185°C insulation system.
■ Type DS-3 or DT-3:
15 kVA and above: 220°C (Class R)
insulation system.
Required performance shall be
obtained without exceeding the above
indicated temperature rise in a 40°C
maximum ambient, with a 30°C
average over 24 hours.
All insulation materials shall be flameretardant and shall not support combustion as defined in ASTM Standard
Test Method D635.

Core and Coil Assemblies
Transformer core shall be constructed
with high grade, non-aging, silicon
steel with high magnetic permeability,
and low hysteresis and eddy current
losses. Maximum magnetic flux densities shall be substantially below the
saturation point. The transformer core
volume shall allow efficient transformer operation at 10% above the
nominal tap voltage. The core laminations shall be tightly clamped and
compressed. Coils shall be wound of
electrical grade [aluminum] [copper]
and continuous wound construction.
BIL (Basic Impulse Level) for all 600volt class windings shall be 10 kV.







Cutler-Hammer Family of Dry-Type Distribution Transformers

On encapsulated units rated [75 kVA
and below] [15 kVA and below] [9 kVA
and below] the core and coil assembly
shall be completely encapsulated in
a proportioned mixture of resin and
aggregate to provide a moistureproof,
shock resistant seal. The core and coil
encapsulation system shall minimize
the sound level.
On ventilated units rated [15 kVA and
above] [30 kVA and above] [112.5 kVA
and above] the core and coil assembly
shall be impregnated with nonhygroscopic, thermosetting varnish
and cured to reduce hot spots and seal
out moisture. The assembly shall be
installed on vibration-absorbing pads.

Enclosures
The enclosure shall be made of heavy
gauge steel and shall be finished
utilizing a continuous process of
degreasing, cleaning, and phosphatizing, followed by electrostatic deposition of a thermosetting polyester
powder coating and subsequent
baking. The coating color shall be
ANSI 61 and shall be UL recognized for
outdoor use. The maximum temperature on top of the enclosure shall not
exceed 90°C.

provide suitable weathershields over
ventilation openings. To ensure proper
ventilation, locate the unit at least 6
inches (152.4 mm) from the adjacent
wall or structure.

Sound Levels
Transformer average sound levels
shall not exceed the following ANSI
and NEMA levels for self-cooled
ratings measured in accordance
with NEMA ST-20.
Table 9-152. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Tests
The following tests shall be performed
as standard on all transformers:
1. Ratio tests at the rated voltage
connection and at all tap
connections.

On units rated [75 kVA and below]
[15 kVA and below] [9 kVA and below]
encapsulated the enclosure construction shall be totally enclosed, nonventilated, NEMA 3R, with lifting
provisions.

2. Polarity and phase relation tests
on the rated voltage connection.

On units rated [15 kVA and above]
[30 kVA and above] [112.5 kVA and
above] the enclosure construction
shall be ventilated, NEMA 2, dripproof, with lifting provisions. All
ventilation openings shall be protected
against falling dirt. On outdoor units,

5. No-load and excitation current at
rated voltage on the rated voltage
connection.

For more information visit: www.cutler-hammer.eaton.com

3. Applied potential tests.
4. Induced potential test.

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-129

November 2003

Technical Data and Specifications

Vol. 1, Ref. No. [0429]

Typical Specifications —
Dry-Type Transformers for
Non-Linear Loads
General
Furnish and install, individually
mounted dry-type transformers of the
two-winding type, self-cooled, with
ratings and voltages as indicated on
the drawings.
Transformers shall be manufactured
by Eaton’s Cutler-Hammer business.
Transformers shall be designed,
manufactured, and tested in accordance with all the latest applicable
ANSI, NEMA and IEEE standards. All
600-volt class transformers through
500 kVA shall be UL listed as suitable
for non-sinusoidal current loads with
K factor not to exceed [4] [13] [20].

Insulation Systems
Transformers shall be insulated with a
UL recognized 220°C (Class R) insulation system. Winding temperature rise
shall be (80°C) (115°C) (150°C).
Required performance shall be
obtained without exceeding the above
indicated temperature rise in a 40°C
maximum ambient, with a 30°C
average.
All insulation materials shall be flameretardant and shall not support combustion as defined in ASTM Standard
Test Method D635.

Core and Coil Assemblies
Transformer core shall be constructed
with high grade, non-aging, silicon
steel with high magnetic permeability,
and low hysteresis and eddy current
losses. Maximum magnetic flux densities shall be substantially below the
saturation point. The transformer core
volume shall allow efficient transformer operation at 10% above the
nominal tap voltage. The core laminations shall be tightly clamped and
compressed.
Transformer coils shall be wound of
electrical grade [aluminum] [copper]
conductor with continuous wound
construction. An electrostatic shield
consisting of a single turn of aluminum shall be placed between the
primary and secondary winding and
grounded to the transformer core. BIL
(Basic Impulse Level) for all 600-volt
class windings shall be 10 kV.
The core and coil assembly shall be
impregnated with non-hygroscopic,
thermosetting varnish and cured to
reduce hot spots and seal out moisture. The assembly shall be installed
on vibration-absorbing pads.
The neutral conductor shall be rated to
carry 200% of normal phase current.

Sound Levels
Transformer average sound levels
shall not exceed the following ANSI
and NEMA levels for self-cooled
ratings measured in accordance
with NEMA ST-20.
Table 9-153. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

The enclosure construction shall be
ventilated, NEMA 2, drip-proof, with
lifting provisions. All ventilation openings shall be protected against falling
dirt. On outdoor units, provide suitable
weathershields over ventilation
openings. To ensure proper ventilation, locate the unit at least 6 inches
(152.4 mm) from the adjacent wall
or structure.

Non-Linear Ratings
The transformers shall be specifically
designed to supply circuits with a
harmonic profile equal to or less than
a K Factor of 4 or 13 as described
below without exceeding [80°C]
[115°C] [150°C] temperature rise.

9

Table 9-154. Non-Linear Ratings
Harmonic

K-4

K-13

Fundamental
3rd
5th

100.0%
34.0%
22.0%

100.0%
70.0%
42.0%

7th
9th
11th

3.0%
1.0%
.7%

5.0%
3.0%
3.0%

13th
15th
17th

.5%
.3%
.3%

1.0%
.7%
.6%

Tests
The following tests shall be performed
as standard on all transformers:
1. Ratio tests at the rated voltage
connection and at all tap
connections.
2. Polarity and phase relation tests
on the rated voltage connection.
3. Applied potential tests.
4. Induced potential test.
5. No-load and excitation current at
rated voltage on the rated voltage
connection.

Enclosures
The enclosure shall be made of heavy
gauge steel and shall be finished utilizing a continuous process of degreasing, cleaning, and phosphatizing,
followed by electrostatic deposition of
a polymer polyester powder coating
and baking. The coating color shall be
ANSI 61 and shall be UL recognized for
outdoor use. The maximum temperature on top of the enclosure shall not
exceed 90°C.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com

Further Information . . . . . . . . . . . . . B.36B.01.S.E
For a complete product
specification in CSI format,
see the Cutler-Hammer
Product Specification Guide . . . . . Section 16462







9-130

Transformers
General Purpose & Industrial Control Transformers
November 2003

Technical Data and Specifications

Typical Specifications —
Low Temperature Rise
Energy Efficient
General
Furnish and install, three-phase low
temperature rise energy efficient drytype transformers of the two-winding
type, self-cooled, with ratings (kVA)
as indicated on the drawings.
Transformers shall be manufactured
by Eaton’s Cutler-Hammer business.

9

Transformers shall be designed, manufactured, and tested in accordance with
all applicable ANSI/NEMA and IEEE
standards, and shall be listed by
Underwriters Laboratories, Inc. and
bear the UL label.
Transformers shall be designed for
continuous operation at rated kVA,
24 hours a day, 365 days a year, with
normal life expectancy as defined in
ANSI C57.96.

Insulation System and
Temperature Rise
Transformers shall be insulated with
a 220°C (Class R) insulation system.
Transformers shall be 115°C rise
(80°C rise) and shall be capable of
carrying a 15% continuous overload,
(80°C rise transformers a continuous
30% overload) without exceeding a
150°C rise. Required performance shall
be obtained without exceeding the
above rise in a 40°C maximum,
30°C average ambient temperature.
All insulation materials shall be flameretardant and shall not support combustion as defined in ASTM Standard
Test Method D635.

Vol. 1, Ref. No. [0430]

Core and Coil Assemblies

Sound Levels

Transformer core shall be constructed
with high grade, non-aging, silicon
steel with high magnetic permeability,
and low hysteresis and eddy current
losses. Maximum magnetic flux
densities shall be substantially below
the saturation point. The core volume
shall allow efficient transformer operation at 10% above the nominal tap
voltage. The core laminations shall
be tightly clamped and compressed.
Coils shall be wound of electrical
grade [aluminum] [copper] with
continuous wound construction. BIL
(Basic Impulse Level) for all 600-volt
class windings shall be 10 kV.

Transformer average sound levels
shall not exceed the following
ANSI/NEMA levels for self-cooled
ratings measured in accordance
with NEMA ST-20.

The core and coil assembly shall be
impregnated with non-hygroscopic,
thermosetting varnish and cured to
reduce hot spots and seal out moisture. The assembly shall be installed
on vibration-absorbing pads.

Enclosures
The enclosure shall be made of heavy
gauge steel and shall be finished utilizing a continuous process of degreasing, cleaning, and phosphatizing,
followed by electrostatic deposition of
a polymer polyester powder coating
and subsequent baking. The coating
color shall be ANSI 61 and shall be UL
recognized for outdoor use.

Table 9-155. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Tests
The following tests shall be performed
as standard on all transformers:
1. Ratio tests at the rated voltage
connection and at all tap
connections.
2. Polarity and phase relation tests
on the rated voltage connection.
3. Applied potential tests.
4. Induced potential test.
5. No-load and excitation current at
rated voltage on the rated voltage
connection.

The enclosure construction shall be
ventilated, NEMA 2, drip-proof, with
lifting provisions. All ventilation
openings shall be protected against
falling dirt. To ensure proper ventilation, locate the unit at least 6 inches
(152.4 mm) from the adjacent wall
or structure.
All transformers shall be equipped
with a wiring compartment suitable
for conduit entry and large enough to
allow convenient wiring. The maximum temperature on top of the
enclosure shall not exceed 90°C.

For a complete product
specification in CSI format,
see the Cutler-Hammer
Product Specification Guide . . . . . Section 16461







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-131

November 2003
Vol. 1, Ref. No. [0431]

Typical Specifications —
Isolation Transformers with
Electrostatic Shielding
General
Furnish and install, single-phase and
three-phase general purpose individually mounted dry-type transformers
of the two-winding type, self-cooled,
with ratings and voltages as indicated
on the drawings. Transformers shall
be manufactured by Eaton’s CutlerHammer business.
Transformers shall be designed, manufactured, and tested in accordance with
all the latest applicable ANSI, NEMA
and IEEE standards. All 600-volt class
transformers through 1000 kVA shall
be UL listed and bear the UL label.
Transformers shall be designed for
continuous operation at rated kVA,
for 24 hours a day, 365 days a year
operation, with normal life expectancy
as defined in ANSI C57.96.

Insulation Systems
Transformers shall be insulated as
follows:
■

Type EP or EPT:
0.050 through 75 kVA: 185°C insulation system which superseded
Class F, based on 115°C rise.
■ Type DS-3 or DT-3:
15 kVA and above: 220°C (Class R)
insulation system which superseded
Class H, based on 150°C rise.
Required performance shall be
obtained without exceeding the above
indicated temperature rise in a 40°C
maximum ambient.
All insulation materials shall be flameretardant and shall not support combustion as defined in ASTM Standard
Test Method D635.

CA08101001E

Technical Data and Specifications

Core and Coil Assemblies
Transformer core shall be constructed
with high grade, non-aging, silicon
steel with high magnetic permeability,
and low hysteresis and eddy current
losses. Maximum magnetic flux
densities shall be substantially below
the saturation point. The transformer
core volume shall allow efficient
transformer operation at 10% above
the nominal tap voltage. The core
laminations shall be tightly clamped
and compressed.
Transformer coils shall be wound of electrical grade aluminum and continuous
wound construction. An electrostatic
shield consisting of a single turn of
[aluminum] [copper] shall be placed
between the primary and secondary
winding and grounded to the transformer core. BIL (Basic Impulse Level) for
all 600-volt class windings shall be 10 kV.
On units rated [75 kVA and below]
[15 kVA and below] [9 kVA and below]
the core and coil assembly shall be
completely encapsulated in a proportioned mixture of resin and aggregate
to provide a moistureproof, shock
resistant seal. The core and coil
encapsulation system shall minimize
the sound level.
On units rated [15 kVA and above]
[30 kVA and above] [112.5 kVA and
above] the core and coil assembly
shall be impregnated with nonhygroscopic, thermosetting varnish
and cured to reduce hot spots and seal
out moisture. The assembly shall be
installed on vibration-absorbing pads.

Enclosures
The enclosure shall be made of heavy
gauge steel and shall be finished utilizing a continuous process of degreasing, cleaning, and phosphatizing,
followed by electrostatic deposition
of a thermosetting polyester powder
coating and baking. The coating color
shall be ANSI 61 and shall be UL
recognized for outdoor use. The
maximum temperature on top of the
enclosure shall not exceed 90°C.

For more information visit: www.cutler-hammer.eaton.com

On units rated [75 kVA and below]
[15 kVA and below] [9 kVA and below]
encapsulated, the enclosure construction shall be totally enclosed, nonventilated, NEMA 3R, with lifting
provisions.
On units rated [15 kVA and above] [30
kVA and above] [112.5 kVA and above]
the enclosure construction shall be
ventilated, NEMA 2, drip-proof, with
lifting provisions. All ventilation
openings shall be protected against
falling dirt. On outdoor units, provide
suitable weathershields over ventilation
openings. To ensure proper ventilation, locate the unit at least 6 inches
(152.4 mm) from the adjacent wall
or structure.

9

Sound Levels
Transformer average sound levels
shall not exceed the following ANSI
and NEMA levels for self-cooled
ratings measured in accordance
with NEMA ST-20.
Table 9-156. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Tests
The following tests shall be performed
as standard on all transformers:
1. Ratio tests at the rated voltage
connection and at all tap
connections.
2. Polarity and phase relation tests
on the rated voltage connection.
3. Applied potential tests.
4. Induced potential test.
5. No-load and excitation current at
rated voltage on the rated voltage
connection.







9-132

Transformers
General Purpose & Industrial Control Transformers
November 2003

Technical Data and Specifications

Typical Specification —
ac Adjustable Frequency
Drive Isolation Transformers
General
Furnish and install, single-phase and
three-phase general purpose individually mounted dry-type transformers
of the two-winding type, self-cooled,
with ratings and voltages for input
application as indicated on the drawings. Transformers shall be manufactured by Eaton’s Cutler-Hammer
business.

9

Transformers shall be designed, manufactured, and tested in accordance with
all the latest applicable ANSI, NEMA
and IEEE standards. All 600-volt class
transformers through 550 kVA shall be
UL listed and bear the UL label.
Transformers shall be designed for
continuous operation at rated kVA, for
24 hours a day, 365 days a year operation, with normal life expectancy as
defined in ANSI C57.96.

Insulation Systems
Transformers shall be insulated with
a UL recognized 220°C (Class R)
insulation system.
Required performance shall be
obtained without exceeding the above
indicated temperature rise in a 40°C
maximum ambient, with a 30°C
average over 24 hours.
All insulation materials shall be flameretardant and shall not support combustion as defined in ASTM Standard
Test Method D635.

Vol. 1, Ref. No. [0432]

Core and Coil Assemblies

Sound Levels

Transformer core shall be constructed
with high grade, non-aging, silicon
steel with high magnetic permeability,
and low hysteresis and eddy current
losses. Maximum magnetic flux densities shall be substantially below the
saturation point. The transformer core
volume shall allow efficient transformer operation at 10% above the
nominal tap voltage. The core laminations shall be tightly clamped and
compressed. Coils shall be wound of
electrical grade [aluminum] [copper]
and continuous wound construction.
BIL (Basic Impulse Level) for all 600volt class windings shall be 10 kV.

Transformer average sound levels
shall not exceed the following ANSI
and NEMA levels for self-cooled
ratings measured in accordance
with NEMA ST-20.

A temperature sensing device shall
be imbedded in the center coil.
The core and coil assembly shall be
impregnated with non-hygroscopic,
thermosetting varnish and cured to
reduce hot spots and seal out moisture. The assembly shall be installed
on vibration-absorbing pads.

Enclosures
The enclosure shall be made of heavy
gauge steel and shall be finished utilizing a continuous process of degreasing, cleaning, and phosphatizing,
followed by electrostatic deposition
of a thermosetting polyester powder
coating and subsequent baking. The
coating color shall be ANSI 61 and
shall be UL recognized for outdoor
use. The maximum temperature
on top of the enclosure shall not
exceed 90°C.
The enclosure construction shall be
ventilated, NEMA 2, drip-proof, with
lifting provisions. All ventilation
openings shall be protected against
falling dirt. To ensure proper ventilation, locate the unit at least 6 inches
(152.4 mm) from the adjacent wall
or structure. On outdoor units, provide suitable weathershields over
ventilation openings.

Table 9-157. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

The following table lists the recommended kVA size of the drive isolation
transformer for a specific horsepower
requirement.
Table 9-158. Three-Phase
Horsepower
ac Motor

kVA
Minimum

5
7.5
10

7.5
11
14

15
20
25

20
27
34

30
40
50

40
51
63

60
75
100

75
93
118

125
150
200

145
175
220

250
300
400

275
330
440

500
600
700

550
660
770

For a complete product
specification in CSI format,
see the Cutler-Hammer
Product Specification Guide . . . . . Section 16461







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-133

November 2003
Vol. 1, Ref. No. [0433]

Technical Data and Specifications

Typical Specifications —
Mini-Power Centers (3 – 30 kVA)
General
Furnish and install, single-phase and
three-phase general purpose individually mounted mini-power centers of
the two-winding type, self-cooled, with
ratings and voltages as indicated on
the drawings. Mini-power centers shall
be manufactured by Eaton’s CutlerHammer business.
Units shall be designed, manufactured, and tested in accordance with
all the latest applicable ANSI, NEMA,
IEEE, CSA and UL standards, and shall
be UL listed and CSA certified and
bear the UL and CSA labels.
Units shall be designed for continuous
operation at rated kVA, 24 hours a day,
365 days a year operation, with normal
life expectancy as defined in ANSI C57.96.
Each mini-power center shall include
a main primary breaker with an interrupting rating of 14 kA at 277/480 volts;
an encapsulated dry-type transformer
and a secondary panelboard with main
breaker rated 10 kA interrupting rating
at 120/240 volts.
a. All interconnecting wiring
between the primary breaker
and transformer, secondary
main breaker and transformer,
and distribution section shall
be factory installed. Main
primary, secondary and feeder
breakers shall be enclosed with
a padlockable hinged door.
b. The secondary distribution
section shall accommodate one
inch, plug-in breakers with
10 kA interrupting capacity.

Insulation System
Transformers shall be insulated with a
185°C insulation system.
Required performance shall be
obtained without exceeding the
above indicated temperature rise in a
40°C maximum ambient, with a 30°C
average over 24 hours.
All insulation materials shall be flameretardant and shall not support combustion as defined in ASTM Standard
Test Method D635.

Core and Coil Assemblies
Transformer core shall be constructed
with high grade, non-aging, silicon
steel with high magnetic permeability,
and low hysteresis and eddy current
losses. Maximum magnetic flux densities shall be substantially below the
saturation point.
CA08101001E

9

Mini-Power Center

The transformer core volume shall
allow efficient transformer operation
at 10% above the nominal tap voltage.
The core laminations shall be tightly
clamped and compressed. Coils shall
be wound of electrical grade aluminum with continuous wound construction. BIL (Basic Impulse Level) for all
600-volt class windings shall be 10 kV.
The core and coil assembly shall be
completely encapsulated in a proportioned mixture of resin and aggregate
to provide a moistureproof, shock
resistant seal. The core and coil encapsulation system shall minimize the
sound level.

Enclosures
The enclosure shall be made of heavy
gauge steel and shall be finished utilizing a continuous process of degreasing, cleaning, and phosphatizing,
followed by electrostatic deposition
of a thermosetting polymer polyester
powder coating and subsequent baking. The coating color shall be ANSI 61
and shall be UL recognized for outdoor
use. Mini-power centers shall be
equipped with a wiring compartment
suitable for conduit entry and large
enough to allow convenient wiring.
The maximum temperature on top of
the enclosure shall not exceed 90°C.
The core of the transformer shall be
grounded to the enclosure. The enclosure shall be totally enclosed, nonventilated, NEMA 3R, with lifting eyes.

For more information visit: www.cutler-hammer.eaton.com

Sound Levels
Transformer average sound levels
shall not exceed the following
ANSI/NEMA levels for self-cooled
ratings measured in accordance
with NEMA ST-20.
Table 9-159. Average Sound Levels
kVA

NEMA Average
Sound Level in dB

0–9
10 – 30

45
50

Tests
The following tests shall be performed
as standard on all transformers:
1. Ratio tests at the rated voltage
connection and at all tap
connections.
2. Polarity and phase relation tests
on the rated voltage connection.
3. Applied potential tests.
4. Induced potential test.
5. No-load and excitation current at
rated voltage on the rated voltage
connection.







9-134

Transformers
General Purpose & Industrial Control Transformers
November 2003

Technical Data and Specifications

Typical Specification –—
NEMA TP-1-1996 Compliant
Energy Efficient Transformers

Core and Coil Assemblies

Enclosures

Furnish and install, three-phase
energy efficient dry-type transformers
that comply with NEMA Standard
TP-1-1996. Transformers shall be of
the two-winding type, self-cooled,
with ratings (kVA) as indicated on the
drawings. Transformer’s losses shall
conform to NEMA TP-1 requirements.
Transformers shall bear the Energy
Star® label and be manufactured by
Eaton’s Cutler-Hammer business.

Transformer core shall be constructed
with high grade, non-aging, silicon
steel with high magnetic permeability,
and low hysteresis and eddy current
losses. Maximum magnetic flux densities shall be substantially below the
saturation point. The transformer core
volume shall allow efficient transformer operation at 10% above the
nominal tap voltage. The core laminations shall be tightly clamped and
compressed. Coils shall be wound of
electrical grade [aluminum] [copper]
and continuous wound construction.
BIL (Basic Impulse Level) for all 600volt class windings shall be 10 kV.

The enclosure shall be made of heavy
gauge steel and shall be finished utilizing a continuous process of degreasing, cleaning, and phosphatizing,
followed by electrostatic deposition
of a thermosetting polyester powder
coating and subsequent baking.
The coating color shall be ANSI 61
and shall be UL recognized for
outdoor use.

Transformers shall be designed, manufactured, and tested in accordance with
all the latest applicable ANSI, NEMA
and IEEE standards, and shall be listed
by Underwriters Laboratories and bear
the UL label.

The core and coil assembly shall be
impregnated with non-hygroscopic,
thermosetting varnish and cured to
reduce hot spots and seal out moisture. The assembly shall be installed
on vibration-absorbing pads.

Transformers shall be designed for
continuous operation at rated kVA, for
24 hours a day, 365 days a year, with
normal life expectancy as defined in
ANSI C57.96.

Efficiency

Insulation System and
Temperature Rise

Table 9-160. NEMA TP-1-1996 Efficiency Levels

General

9

Vol. 1, Ref. No. [0434]

Transformers shall be insulated with
a 220°C (Class R) insulation system.
Transformers shall be 150°C rise and
shall be capable of carrying a 15% continuous overload without exceeding a
150°C rise. Required performance shall
be obtained without exceeding the
above rise in a 40°C maximum, 30°C
average ambient temperature.
All insulation materials shall be retardant and shall not support combustion
as defined in ASTM Standard Test
Method D635.

Transformers shall be energy efficient
with minimum efficiencies as set forth
per NEMA TP-1-1996 when operated at
35% of full load capacity.
Tables of Energy Efficiency
NEMA Class 1 Efficiency Levels
dry-type Distribution Transformers —
Low Voltage
Single-Phase
kVA

All transformers shall be equipped
with a wiring compartment suitable
for conduit entry and large enough
to allow convenient wiring. The maximum temperature on top of the
enclosure shall not exceed 90°C.

Sound Levels
Transformer average sound levels shall
not exceed the following ANSI and
NEMA levels for self-cooled ratings.
Table 9-161. Average Sound Levels
NEMA ST-20 Average Sound Level (dB)
kVA

Ventilated

Encapsulated

0–9
10 – 50
51 – 150
151 – 300

40
45
50
55

45
50
55
57

301 – 500
501 – 700
701 – 1000
1001 – 1500

60
62
64
65

59
61
63
64

Three-Phase

Efficiency kVA

Efficiency

97.7
98.0
98.2

15
30
45

97.0
97.5
97.7

50
75
100

98.3
98.5
98.6

75
112.5
150

98.0
98.2
98.3

167
250
333
—
—

98.7
98.8
98.9
—
—

15
25
37.5

The enclosure construction shall be
ventilated, NEMA 2, drip-proof, with
lifting provisions. All ventilation
openings shall be protected against
falling dirt. To ensure proper ventilation, locate the unit at least 6 inches
(152.4 mm) from the adjacent wall
or structure.

225
300
500
750
1000

98.5
98.6
98.7
98.8
98.9

Tests
The following tests shall be performed
as standard on all transformers:
1. Ratio tests at the rated voltage
connection and at all tap
connections.
2. Polarity and phase relation tests
on the rated voltage connection.
3. Applied potential tests.
4. Induced potential test.
5. No-load and excitation current at
rated voltage on the rated voltage
connection.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-135

November 2003

Technical Data and Specifications

Vol. 1, Ref. No. [0435]

Standards and Certification
Cutler-Hammer Dry-Type Distribution Transformers by Eaton Corporation are approved, listed, recognized or may comply
with the following standards.
Table 9-162. Engineering Standards
Catalog
Product
Name

UL
Standard

UL/cUL
File
Number

UL Listed
Control
Number

cUL Energy
Efficiency
File Number

CSA
File
Number

Insulation
System
Temp/ºC

kVA
SinglePhase

kVA
ThreePhase

Applicable
IEC
Standard

Industrial Control Transformer
MTA

506

E10156

591H

—

LR60545 


105

.05 – 5

N/A

61558

MTC

506

E10156

591H

—

LR60545 


105

.05 – 5

N/A

61558

MTE

506

E46323

702X

—

LR27533

105

.025 – 1.5

N/A

61558

MTG

506

E46323

702X

—

LR27533

105

.05 – 1.0

N/A

61558

MTK

506

E46323

702X

—

LR27533

180

.05 – 5

N/A

61558

Encapsulated Transformer
AP

506

E10156

591H

—

—

180

3 – 10

N/A

61558

AP

1561

E78389

591H

—

—

180

15

N/A

61558

EP

506

E10156

591H

—

LR60545

180

.05 – 10

N/A

61558

LR60545 

N/A

61558 /726 


EP

1561

E78389

591H

EV157 

180

15 – 50

EPT

506

E10156

591H

—

LR60545

180

N/A

3–9

61558 /726 

EPT

1561

E78389

591H

EV157 

LR60545 

180

N/A

15 – 75

726

506 /1561  E53449

591H

—

LR60546

180

3 – 25

15 – 30

—

MPC

Ventilated Transformer
DS-3

1561

E78389

591H

EV157 

LR60545 

220

15 – 167

N/A

60726

DT-3

1561

E78389

591H

EV157 

LR60545 

220

N/A

15 – 750

60726

KT

1561

E78389

591H

EV157 

—

220

N/A

9 – 500

N/A









Applies to .05 – 1 kVA.
Applies to 25 – 50 kVA.
Applies to 25 kVA.
Applies to 15 – 25 kVA.
Applies to 37.5 kVA.







Applies to 3 kVA.
Applies to 5 – 9 kVA.
Applies to 30 – 75 kVA.
Applies to 30 kVA.
Applies to 3 – 10 kVA.






Applies to 15 – 30 kVA.
Applies to 25 – 167 kVA.
Applies to 30 – 750 kVA.
Applies to 30 – 500 kVA.

In addition to the above standards, Cutler-Hammer Dry-Type Distribution transformers are also manufactured in compliance
with the applicable standards listed below.
Note: Not all of the following standards apply to every transformer.
■
■
■
■
■
■
■
■
■
■
■
■
■

NEC: National Electrical Code
.
NEMA ST-1: Specialty Transformers (C89.1) (control transformers).
NEMA ST-20: General Purpose Transformers.
NEMA TP-1: Guide for Determining Energy Efficiency for Distribution Transformers.
NEMA 250: Enclosures for Electrical Equipment (1000 volts maximum).
IEEE C57.12.01: General Requirements for Dry-Type Distribution and Power Transformers (including those with
solid-cast and/or resin-encapsulated windings).
ANSI C57.12.70: Terminal Markings and Connections for Distribution and Power Transformers.
ANSI C57.12.91: Standard Test Code for Dry-Type Distribution and Power Transformers.
CSA C22 No. 47-M90: Air-Cooled Transformers (Dry-Type).
CSA C9-M1981: Dry-Type Transformers.
CSA C22.2 No. 66: Specialty Transformers.
CSA 802-94: Maximum Losses for Distribution, Power, and Dry-Type Transformers.
NEMA TP-2: Standard Test Method for Measuring the Energy Consumption of Distribution Transformers.

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

9-136

Transformers
General Purpose & Industrial Control Transformers
November 2003

Technical Data and Specifications

Product Selection

Vol. 1, Ref. No. [0436]

Table 9-163. Single-Phase ac Motors
Horsepower

Full Load Amperes

Single-Phase Transformers

115 Volts

kVA = Volts x Amperes
1000
— If the load is an ac motor, determine the minimum transformer
kVA from the chart at
the right.
— Select a transformer rating
equal to or greater than the
load kVA.
4. Define tap arrangements needed.
5. Define temperature rise.
Using the above procedure, select
the transformer from the listings in
this catalog.







Minimum
Transformer kVA 


2.4
3.2
4.0

2.3
3.0
3.8

2.2
2.9
3.6

.53
.70
.87

1/2
3/4
1

9.8
13.8
16

5.4
7.6
8.8

5.1
7.2
8.4

4.9
6.9
8

1.18
1.66
1.92

1-1/2
2
3

20
24
34

11.0
13.2
18.7

10.4
12.5
17.8

10
12
17

2.40
2.88
4.10

5
7-1/2
10

56
80
100

30.8
44
55

29.3
42
52

28
40
50

6.72
9.6
12.0

2. Determine the secondary (load)
voltage — the voltage needed at
the load.

— If the load rating is given in
amperes, determine the load kVA
from the below chart. To determine
kVA when volts and amperes are
known, use the formula:

230 Volts

4.4
5.8
7.2

1. Determine the primary (source)
voltage — the voltage presently
available.

9

220 Volts

1/6
1/4
1/3

How to Select Single-Phase Units

3. Determine the kVA load:
— If the load is defined in kVA, a
transformer can be selected from
the tabulated data.

208 Volts




If motors are started more than once per hour, increase minimum transformer kVA by 20%.

Note: When motor service factor is greater than 1, increase full load amperes proportionally.
Example: If service factor is 1.15, increase above ampere values by 15%.

Table 9-164. Full Load Current in Amperes — Single-Phase Circuits
kVA

Voltage
120

2400

4160

2.0
4.2
6.3

1.2
2.4
3.6

1.1
2.3
3.4

1.0
2.1
3.1

.9
1.8
2.7

.5
1.0
1.6

.4
.8
1.3

.10
.21
.31

.06
.12
.18

1
1.5
2

8.3
12.5
16.7

4.8
7.2
9.6

4.5
6.8
9.1

4.2
6.2
8.3

3.6
5.4
7.2

2.1
3.1
4.2

1.7
2.5
3.3

.42
.63
.83

.24
.36
.48

3
5
7.5

25
41
62

14.4
24.0
36

13.6
22.7
34

12.5
20.8
31

10.8
18.0
27

6.2
10.4
15.6

5.0
8.3
12.5

1.2
2.1
3.1

.72
1.2
1.8

20.8
31
52

16.7
25
41

4.2
6.2
10.4

2.4
3.6
6.0

.25
.50
.75

208

220

240

277

480

600

10
15
25

83
125
208

48
72
120

45
68
114

41
62
104

36
54
90

37.5
50
75

312
416
625

180
240
360

170
227
341

156
208
312

135
180
270

78
104
156

62
83
125

15.6
20.8
31.3

9.0
12.0
18.0

833
1391

480
802

455
759

416
695

361
602

208
347

166
278

41.7
69.6

24.0
40.1

100
167

For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-137

November 2003

Technical Data and Specifications

Vol. 1, Ref. No. [0437]

Three-Phase Transformers
How to Select Three-Phase Units

Table 9-165. Three-Phase ac Motors
Horsepower

1. Determine the primary (source)
voltage — the voltage presently
available.

— If the load is an ac motor, determine the minimum transformer
kVA from the chart at
the right.
— Select a transformer rating
equal to or greater than the
load kVA.
4. Define tap arrangements needed.
5. Define temperature rise.
Using the above procedure, select
the transformer from the listings in
this catalog.

CA08101001E

380 Volts

460 Volts

575 Volts

Minimum
Transformer kVA 


2.2
3.1
4.0

2.0
2.8
3.6

1.2
1.7
2.2

1.0
1.4
1.8

.8
1.1
1.4

.9
1.2
1.5

1-1/2
2
3

5.7
7.5
10.7

5.2
6.8
9.6

3.1
4.1
5.8

2.6
3.4
4.8

2.1
2.7
3.9

2.1
2.7
3.8

5
7-1/2
10

16.7
24
31

15.2
22
28

9.2
14
17

7.6
11
14

6.1
9
11

6.3
9.2
11.2

15
20
25

46
59
75

42
54
68

26
33
41

21
27
34

17
22
27

16.6
21.6
26.6

30
40
50

88
114
143

80
104
130

48
63
79

40
52
65

32
41
52

32.4
43.2
52

60
75
100

170
211
273

154
192
248

93
116
150

77
96
124

62
77
99

64
80
103

125
150
200

342
396
528

312
360
480

189
218
291

156
180
240

125
144
192

130
150
200

1

3. Determine the kVA load:
— If the load is defined in kVA, a
transformer can be selected from
the tabulated data.

kVA = Volts x Amperes x 1.732
1000

230 Volts

1/2
3/4

2. Determine the secondary (load)
voltage — the voltage needed at
the load.

— If the load rating is given in
amperes, determine the load kVA
from the below chart. To determine
kVA when volts and amperes are
known, use the formula:

Full Load Amperes
208 Volts




9

If motors are started more than once per hour, increase minimum transformer kVA by 20%.

Note: When motor service factor is greater than 1, increase full load amperes proportionally.
Example: If service factor is 1.15, increase above ampere values by 15%.

Table 9-166. Full Load Current in Amperes — Three-Phase Circuits
kVA

Voltage
208

240

380

480

600

2400

4160

3
6
9

8.3
16.6
25

7.2
14.4
21.6

4.6
9.1
13.7

3.6
7.2
10.8

2.9
5.8
8.6

.72
1.4
2.2

.42
.83
1.2

15
22.5
30

41.7
62.4
83.4

36.1
54.1
72.3

22.8
34.2
45.6

18.0
27.1
36.1

14.4
21.6
28.9

3.6
5.4
7.2

2.1
3.1
4.2

57.0
68.4
76

45.2
54.2
60.1

36.1
43.4
48.1

9.0
10.8
12.0

5.2
6.3
6.9

37.5
45
50

104
124
139

90.3
108
120

75
112.5
150

208
312
416

180
270
360

114
171
228

90
135
180

72
108
144

18.0
27.1
36.1

10.4
15.6
20.8

225
300
500

624
832
1387

541
721
1202

342
456
760

270
360
601

216
288
481

54.2
72.2
120

31.3
41.6
69.4

750
1000

2084
2779

1806
2408

1140
1519

903
1204

723
963

180
241

For more information visit: www.cutler-hammer.eaton.com

104
139







Transformers
General Purpose & Industrial Control Transformers

9-138

November 2003

Catalog Numbering System

Vol. 1, Ref. No. [0438]

Catalog Numbering System
Note: Contact your local Cutler-Hammer sales office for voltage combinations not shown. Use table for catalog number breakdown only.
Do not use to create catalog numbers since all combinations may not be valid.

Table 9-167. General Purpose, Energy Efficient, Mini-Power Center, Shielded Isolation, Non-Linear, Buck-Boost, Marine Duty Transformers —
Example: S20N11S05A

S 20 N 11 S 05 A
Type
S
Y
T
V
P
Z

= EP (1-Ph encapsulated)
= EPT (3-Ph encapsulated)
= DS-3 (1-Ph ventilated)
= DT-3 (3-Ph ventilated)
= Mini-Power Center
= Class 1 Division 2
Groups C and D
X = Harmonic Mitigating
(3-ph ventilated)

9

Non-Linear
H = KT-4 (3-Ph ventilated)
B = KT-9 (3-Ph ventilated)
N = KT-13 (3-Ph ventilated)
G = KT-20 (3-Ph ventilated)
J = KT-30 (3-Ph ventilated)
A = KT-40 (3-Ph ventilated)
K = KT-50 (3-Ph ventilated)
HT = KT-4 (1-Ph ventilated)
NT= KT-13 (1-Ph ventilated)
GT= KT-20 (1-Ph ventilated)
Marine Duty
Q = EPM Marine
(1-Ph encapsulated)
L = EPTM Marine
(3-Ph encapsulated)
R = DS-3M Marine
(1-Ph ventilated)
M = DT-3M Marine
(3-Ph ventilated)

Primary Voltage
13
12
10
29
72
25
23
24
20
27
38
39
43
44
45
48
57
60
42
46
49
40

= 110 x 220
= 120
= 120 x 240
= 208
= 200
= 220
= 230
= 240
= 240 x 480
= 277
= 380
= 400
= 416
= 440
= 450
= 480
= 575
= 600
= 2400
= 4160
= 4800
= Export Model

D
E
F
G
J
K
L
M
N
R
P

= 2@+2.5%, 2@-2.5%
= 1@+5%, 1@-5%
= 1@-10%
= 2@-5%
= 4@-2.5%
= 1@-10% x 2@-5%
= 2@-5% x 4@-2.5%
= 2@+2.5%, 4@-2.5%
= None
= 1@+5%, 2@-5%
= 1@+5%, 2@-5% x
2@+2.5%, 4@-2.5%
= 1@+4.2%, 1@-4.2%
= 1@+2.5%, 3@-2.5%
= 1@+3.5%, 1@-3.5%
= 2@+3.1%, 2 @-3.1%

Taps

T
U
W
X

Phase
A
B
F
E
S
T

= Buck and Boost
= 80°C Rise
= 115°C Rise
= Electrostatic Shield
= Single
= Three

Secondary Voltage
04
06
08
14
12
10
11
54
19
28
29
25
31
26
22
64
24
20
21
27
38
37
34
51
35
62
47
48
60
61
42
41
46
49

= 12/24
= 16/32
= 24/48
= 110/220
= 120
= 120 x 240
= 120/240
= 127/254
= 190Y/110
= 208Y/120
= 208
= 220 Delta
= 220Y/127
= 220∆/110 Midtap
= 240∆/120 Midtap
= 240Y139
= 240 Delta
= 240 x 480
= 240/480
= 277
= 380 Delta
= 380Y/220
= 400Y/231
= 416Y/240
= 440Y/254
= 460Y/266
= 480Y/277
= 480 Delta
= 600 Delta
= 600Y/346
= 2400
= 4160Y/2400
= 4160
= 4800

kVA
81
85
82
83
26
51
76
01
16
02
03
05
06
07
09
10
15
21
25
30
37
45
50
75
99
12
49
67
22
52
33
54
55
60
77
11
14

= .05
= .075
= .10
s= .15
= .25
= .50
= .75
=1
= 1.5
=2
=3
=5
=6
= 7.5
=9
= 10
= 15
= 22.5
= 25
= 30
= 37.5
= 45
= 50
= 75
= 100
= 112.5
= 150
= 167
= 225
= 250
= 300
= 333
= 500
= 600
= 750
= 1000
= 1500

Suffix Options
A...Z = 

CU = 
SS = 
ZZ
=
NV = 
X
=
LS_ _ = 	
AF = 
TR = 
SR = 
CE = 
T
=
EE
=
NON = 
POS = 	
NEG = 





Model number is not used on newly designed/redesigned transformers.
Copper windings.
 Stainless steel (utilizes 316 stainless steel, does not imply a NEMA 4X rating).
 Open type core and coil assembly.
 Totally enclosed non-ventilated DS-3 or DT-3.
 50/60 Hz.
	 Low sound design. LS47 indicates low sound equal to 47 dB; LS42 indicates 42 dB.
 Fungus proof.
 Certified test report of standard production tests.
 Certified sound level report.
 CE marked.
 Thermal indicator embedded in center coil. Suffix “TT” indicates two thermal indicators of different temperature ratings, are installed.
 NEMA TP-1 Energy Star Energy Efficient.
 0º phase-shift
	 +15º phase-shift

 -15º phase-shift
Note: For the Cutler-Hammer Industrial Control Transformers Catalog Numbering System see Page 9-140.








For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-139

November 2003

Catalog Numbering System

Vol. 1, Ref. No. [0439]

Catalog Numbering System
Note: Contact your local Cutler-Hammer sales office for voltage combinations not shown. Use table for catalog number breakdown only.
Do not use to create catalog numbers since all combinations may not be valid.

Table 9-168. Motor Drive Isolation Transformers — Example: MD145E89B

MD 145 E 89 B
Type
MD = DT-3
HD = KT-4
ND = KT-13




kVA
075 = 7.5
11 = 11
14 = 14
20 = 20
27 = 27
34 = 34
40 = 40
51 = 51
63 = 63
75 = 75
93 = 93
118 = 118
145 = 145
175 = 175
220 = 220
275 = 275
330 = 330
440 = 440
550 = 550
660 = 660
770 = 770
880 = 880
1000 = 1000
1250 = 1250
1500 = 1500

Taps 

D = 2@+2.5%, 2@-2.5%
E = 1@+5%, 1@-5%

Voltage
Primary Secondary
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98

=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=

230∆
208∆
240∆
208∆
208∆
208∆
230∆
230∆
230∆
460∆
460∆
460∆
575∆
575∆
575∆
575∆
600∆

208Y/120
208Y/120
480∆
230Y/133
460Y/266
480∆
230Y/133
460Y/266
575Y/332
230Y/133
460Y/266
575Y/332
230Y/133
460Y/266
575Y/332
480∆
480∆

Suffix Options
Y

= Encapsulated
(Type EPT) design
ES = Electrostatic Shield
CU = Copper Windings
F = 115°C Rise
B = 80°C Rise
X = 50/60 Hz

9

For other tap combinations, contact your local Cutler-Hammer sales office.

CA08101001E

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9-140

Transformers
General Purpose & Industrial Control Transformers
November 2003

Catalog Numbering System

Vol. 1, Ref. No. [0440]

Catalog Numbering System
Note: Contact your local Cutler-Hammer sales office for voltage combinations not shown. Use table for catalog number breakdown only.
Do not use to create catalog numbers since all combinations may not be valid.

Table 9-169. Industrial Control Transformers, CE Marked Control Transformers — Example: CE0250G2FES

CE 0250 G 2F ES
Type
C = Industrial
Control
Transformer
CE= CE Marked
Control
Transformer

9

VA Rating
0025 = 25
0050 = 50
0075 = 75
0100 = 100
0150 = 150
0200 = 200
0250 = 250
0300 = 300
0350 = 350
0500 = 500
0750 = 750
1000 = 1000
1500 = 1500
2000 = 2000
3000 = 3000
5000 = 5000
Type AP Only:
0003 = 3000
0005 = 5000
0007 = 7500
0010 = 10000
0015 = 15000

Modifications

Transformer
Design
A= MTA
C = MTC
E = MTE
G= MTG
K = MTK
P = AP
Voltage
Primary
AC =
AG =
1B =
2A =

2B =
2C =
2F =
2G =
2U =

2V =
2W =
3A =
3B =
3C =
3D =
4B =
4C =
4D =
4E =
4H =
4W =
5E =

6U =

7G =
(Type AP
Only)

380 x 415
208/240/277/380/480
120 x 240
240 x 480,
230 x 460,
220 x 440
240 x 480
240 x 480
230/460
230/460
220/380/440/550,
230/400/460/575,
240/416/480/600
208/230/400/460/575
208/230/400/460/575
208/277
115
230/460/575
208/380/416
208/230/460/575
550/575/600
380/400/415
208/230/460/575
380/400/415
550/575/600
200/220/440,
208/230/460,
240/480
240/416/480/600,
230/400/460/575,
220/380/440/550,
208/500
240 x 480

Secondary
24
24
24
120/115/110

24
120 x 240
115
115/230
23/110, 24/115,
25/120
24/115/230
115/230
120
24
115/95
115/95
24
110/115/120
110 x 220
115
22/23/24
22/23/24
23/110, 24/115,
25/120

Type MTE/MTG/MTK
FB = Factory mounted 2-pole primary
fuse block for rejection type fuses
FBN = Factory mounted 2-pole primary
fuse block for non-rejection
type fuses
Q = Secondary fuse clips for
1/4 x 1-1/4 inch fuses
XX = No Secondary fuse clips
RT = Ring type terminals for
connection to fuse block
ES = Electrostatic shield
FS = Factory mounted finger safe
terminal shields
Type AP
B
= Bottom mounted
S
= Side/wall mounted
ES = Electrostatic shield
CU = Copper windings
Type MTA/MTC
FB = Factory mounted 3-pole fuse
block (2-pole primary rejection
type with 1-pole secondary
non-rejection type)
ES = Electrostatic shield
L
= Lead terminations

99/120/130,
95/115/125,
91/110/120,
85/100/110
120/240

Note: For the Cutler-Hammer dry-type Transformers Catalog Numbering System see Page 9-138 and 9-139.







For more information visit: www.cutler-hammer.eaton.com

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-141

November 2003
Vol. 1, Ref. No. [0441]

Modifications to General Purpose
Units NOT Registered in VISTA
Note: These rules apply only to list prices and
not to net priced standard transformers. Prior
to applying these pricing rules, verify that the
style number you require is not already registered in VISTA with a valid list price. List prices
in VISTA take precedence over all manually
calculated list prices. List price additions for
special transformers are intended to be
applied to the “base design” nearest to your
application. “Base design” is typically a standard 150°C rise, aluminum wound transformer
with the same electrical configuration as the
special unit you require, i.e., delta-delta connected, or delta-wye connected.

List Price Additions
Rule 1. Special Primary/Secondary
Voltages
If either one or both are non-standard
(not listed in the catalog section for that
particular transformer type), add 10%.

Rule 2. Copper Windings
The standard winding material is aluminum. For copper windings, add 35%.
Note: For units rated 1000 kVA and
above, refer to the Eaton’s Cutler-Hammer
business.

Rule 3. Temperature Rise
For 115°C rise, when 150°C rise is
standard, on units rated 750 kVA and
below, add 15%.
For 80°C rise, when 150°C rise is
standard, on units rated 500 kVA and
below, add 35%.
For 80°C rise, when 115°C rise encapsulated is standard, on units rated 45
kVA and below, add 25%.

Price Modifications
Rule 7. Special Sound Levels

Rule 14. CSA Labeled

When sound levels below NEMA standard ST-20 are required, add 5% per
decibel below NEMA standard levels.
This rule cannot be applied to K Factor
nonlinear transformers. Contact your
Cutler-Hammer representative for special sound requirements, such as low
sound K-factor nonlinear products and
requirements for sound levels exceeding 5 dB below NEMA standards.

For transformers that are CSA labeled,
add 10%.

Rule 8. Fungus Proofing
Fungus proofing consists of spraying
all equipment within the wiring compartment with a fungicidal varnish.
Add suffix AF to style number if this
treatment is required. List price additions are:

For electrostatic shields, which form
a ground plane between the high and
low voltage windings, add 10%.

Rule 5. Stainless Steel
For transformers with stainless steel
enclosures, add 30%.

Rule 6. 50 Hertz
The standard frequency is 60 Hertz.
For 50 Hertz, add 25%.

Thermal indicators are included as
standard in Cutler-Hammer Type MD
Motor Drive Isolation transformers.
Thermal indicators are set to activate
at a temperature of 190°C.
The Cutler-Hammer standard is to
install one indicator in the center coil.
To have thermal indicators installed in
transformers other than Motor Drive
Isolation, add $500.00 List Price/Set.

Rule 16. Certified Test Reports

Ventilated design $500.00/unit

Factory certified test reports are available only when they are requested at
the time of order entry. The following
Certified Test Reports are available:

Rule 9. Non-Standard Taps

A. Certified Report of Standard
Production Tests:

Encapsulated design $250.00/unit

Standard high voltage taps are listed
in this catalog. When more than the
listed taps are required, refer to Division. Additional taps are available
in 2.5% steps only, up to a maximum
of 6 taps.

Rule 10. Double Neutral
For three-phase applications where a
200% neutral is required, add 5%.

Rule 11. Lighting Tap
A lighting tap is available on the secondary (delta only) winding of a threephase unit rated 30 through 300 kVA.
Tap is limited to 5% rated kVA.

Rule 4. Electrostatic Shields

Rule 15. Thermal Indicators

For a 120 V single-phase tap, add 15%.

Suffix TR $500.00/unit
List Price addition
B. Certified Report of NEMA Sound
Level Tests:
Suffix SR $1,500.00/unit
List Price addition
Add the appropriate Suffix from above
to the style number when requesting
these Certified Test Reports.

Net Price Additions
Note: Apply after all list price modifications
and discounts are calculated.

Rule 1. Special Drawings

Rule 12. NEMA TP-1 Energy Efficient

When paper print factory drawings are
required, add $25.00 net per item.

For ventilated transformers that
meet the NEMA TP-1 and Energy Star
energy efficiency standards, add 40%.

When sepia paper reproducible factory
drawings are required, add $100.00
net per item.

Rule 13. CE Marked

When aperture cards are required, add
$50.00 net per item.

For single-phase encapsulated, or
ventilated transformers that comply
with European standards and have a
CE Mark, add 10%.

Note: For units rated 1000 kVA and above,
refer to the Cutler-Hammer business.

CA08101001E

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9

9-142

Transformers
General Purpose & Industrial Control Transformers
November 2003

Glossary

Vol. 1, Ref. No. [0442]

Glossary of Transformer Terms
Air Cooled: A transformer which is
cooled by the natural circulation of air
around, or through, the core and coils
Ambient Noise Level: The existing
noise level of the area surrounding the
transformer, prior to energizing the
transformer.
Ambient Temperature: The temperature of the air surrounding the transformer into which the heat of the
transformer is dissipated.
Attenuation: A decrease in signal power
or voltage. Unit of measure is dB.

9

Autotransformer: A transformer in
which part of the winding is common to
both the primary and secondary circuits.
Banked: Two or more single-phase
transformers wired together to supply
a three-phase load. Three single-phase
transformers can be “banked” together
to support a three-phase load. For
example, three 10 kVA single-phase
transformers “banked” together will
have a 30 kVA three-phase capacity.
BIL: Basic Impulse Level. The ability
of a transformer’s insulation system
to withstand high voltage surges.
All Eaton’s Cutler-Hammer 600V-class
transformers have a 10 kV BIL rating.
Buck-Boost: The name of a standard,
single-phase, two-winding transformer
application with the low voltage secondary windings connected as an
autotransformer for boosting (increasing) or bucking (decreasing) voltages in
small amounts. Applications can either
be single phase or three phase.
Center Tap: A tap at the mid-point of
a winding. The center tap on threephase delta-delta transformers is
called a lighting tap. It provides 5%
of the transformer’s kVA for singlephase loads.
Certified Tests: Actual values taken
during production tests and certified
as applying to a given unit shipped
on a specific order. Certified tests are
serial number specific.
Common Mode: Electrical noise
or voltage fluctuation that occurs
between all of the line leads and the
common ground, or between ground
and line or neutral.
Compensated Transformer: A transformer with a turns ratio that provides a
higher than nameplate output (secondary) voltage at no load, and nameplate
output (secondary) voltage at rated load.
It is common for small transformers
(2 kVA and less) to be compensated.







Conductor Losses: Losses (expressed
in watts) in a transformer which are
incidental to carrying a load: coil resistance, stray loss due to stray fluxes in
the windings, core clamps, etc., as well
as circulating currents (if any) in parallel windings. Also called load losses.
Core Losses: Losses (expressed in watts)
caused by magnetization of the core
and its resistance to magnetic flux.
Also called no-load losses or excitation
losses. Core losses are always present
when the transformer is energized.
Delta Connection: A standard threephase connection with the ends of
each phase winding connected in
series to form a closed loop with each
phase 120 degrees from the other.
Sometimes referred to as 3-wire.
Dielectric Tests: Tests which consist
of the application of a voltage higher
than the rated voltage for a specified
time for the purpose of determining
the adequacy against breakdowns of
insulating materials and spacings
under normal conditions.
Dry-Type Transformer: A transformer
in which the core and coils are not
immersed in a liquid.
Efficiency: The ratio of the power output
from a transformer to the total power
input. Typically expressed as a %.
Electrostatic Shield: Copper or other
conducting sheet placed between
primary and secondary windings,
and grounded to reduce electrical
interference and to provide additional
protection from line-to-line or lineto-ground noise.
Encapsulated Transformer: A transformer with its coils either dipped or
cast in an epoxy resin or other encapsulating substance.
Excitation Current: No Load Current.
The current that flows in any winding
used to excite the transformer when all
other windings are open-circuited. It is
usually expressed in percent of the rated
current of a winding in which it is measured. Also called magnetizing current.
FCAN: “Full Capacity Above Normal”
taps. Designates the transformer will
deliver its rated kVA when connected
to a voltage source which is higher
than the rated primary voltage.
FCBN: “Full Capacity Below Normal”
taps. Designates the transformer will
deliver its rated kVA when connected
to a voltage source which is lower than
the rated primary voltage.
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Frequency: On ac circuits, designates the
number of times that polarity alternates
from positive to negative and back again
per second such as 60 cycles per second.
Typically measured in Hertz (Hz).
Ground: Connecting one side of a
circuit to the earth through low resistance or low impedance paths to help
prevent transmitting electrical shock
to personnel.
Hp: Horsepower. The energy required
to raise 33,000 pounds a distance of
one foot in one minute. 1 hp is equal to
746 watts.
Harmonic: A sinusoidal waveform with
a frequency that is an integral multiple
of the fundamental frequency (60 Hz).
Hi Pot: A standard test on dry-type
transformers consisting of extra-high
potentials (voltages) connected to the
windings. Used to check the integrity
of insulation materials and clearances.
Impedance: The retarding forces of
current in an ac circuit; the current-limiting characteristics of a transformer.
Symbol = Z
Inductance: In electrical circuits, the
opposition to a change in the flow of
electrical current. Symbol = L
Inducted Potential Test: A standard
dielectric test of transformer insulation. Verifies the integrity of insulating
materials and electrical clearances.
Insulation: Material with a high
electrical resistance.
Insulation Materials: Those materials
used to insulate the transformer’s
electrical windings from each other
and ground.
Isolating Transformer: A transformer
where the input (primary) windings
are not connected to the output
(secondary) windings (i.e., electrically
isolated).
K Factor: A common industry term for
the amount of harmonics produced by
a given load. The larger the K Factor,
the more harmonics that are present.
Also used to define a transformer’s
ability to withstand the additional heating generated by harmonic currents.
kVA: Kilovolt-ampere. Designates the
output that a transformer can deliver
for a specified time at a rated secondary voltage and rated frequency
without exceeding the specified
temperature rise.
1000 VA = 1 kVA
CA08101001E

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General Purpose & Industrial Control Transformers

9-143

November 2003
Vol. 1, Ref. No. [0443]

Load Losses: I2R losses in windings.
Also see Conductor Losses
Mid-Tap: See Center Tap
Noise Level: The relative intensity of
sound, measured in decibels (dB).
NEMA Standard ST-20 outlines the
maximum allowable noise level for
dry-type transformers.
Non-Ventilated Transformer: A transformer where the core and coil assembly is mounted inside an enclosure
with no openings for ventilation. Also
referred to as Totally Enclosed NonVentilated (TENV).

Glossary
Ratio Test: A standard test of transformers to determine the ratio of the
input (primary) voltage to the output
(secondary) voltage.
Reactance: The effect of inductive and
capacitive components of a circuit producing other than unity power factor.
Regulation: Usually expressed as the
percent change in output voltage
when the load goes from full load to
no load.
Scott T Connection: Connection for
three-phase transformers. Instead of
using three sets of coils for a threephase load, the transformer utilizes
only two sets of coils.

Total Losses: The sum of the no-load
losses and load losses.
Transformer Tests: Per NEMA ST-20,
routine transformer production tests
are performed on each transformer
prior to shipment. These tests are:
Ratio tests on the rated voltage connection; Polarity and Phase Relation
tests on the rated connection; No-load
and Excitation current tests at rated
voltage on the rated voltage connection and Applied Potential and Induced
Potential tests. Special tests include
sound level testing.

Star Connection: Same as a wye
connection.

Transverse Mode: Electrical noise or
voltage disturbance that occurs
between phase and neutral, or from
spurious signals across metallic hot
line and the neutral conductor.

Step-down Transformer: A transformer where the input voltage is
higher than the output voltage.

Turns Ratio: The ratio of the number
of turns in the high voltage winding
to that in the low voltage winding.

Percent IR (% resistance): Voltage drop
due to resistance at rated current in
percent of rated voltage.

Step-up Transformer: A transformer
where the input voltage is less than
the output voltage.

Typical Test Data: Tests that were
performed on similar units that were
previously manufactured and tested.

Percent IX (% reactance): Voltage drop
due to reactance at rated current in
percent of rated voltage.

Tap: A connection brought out of a
winding at some point between its
extremities, usually to permit changing the voltage or current ratio. Taps
are typically used to compensate for
above or below rated input voltage,
in order to provide the rated output
voltage. See FCAN and FCBN.

UL (Underwriter’s Laboratories):
An independent safety testing
organization.

No Load Losses: Losses in a transformer that is excited at rated voltage
and frequency but which is not supplying a load. No load losses include core
losses, dielectric losses, and conductor
losses in the winding due to the exciting current. Also referred to as Excitation Losses.

Percent IZ (% impedance): Voltage
drop due to impedance at rated current in percent of rated voltage.
Phase: Type of ac electrical circuit; usually single-phase 2- or 3-wire, or threephase 3- or 4-wire.
Polarity Test: A standard test on transformers to determine instantaneous
direction of the voltages in the primary
compared to the secondary.
Primary Taps: Taps added to the primary (input) winding. See Tap.
Primary Voltage: The input circuit
voltage.

Temperature Class: The maximum
temperature that the insulation system
of a transformer can continuously
withstand. The common insulation
classes are 105, 150, 180 (also 185)
and 220.
Temperature Rise: The increase over
ambient temperature of the windings
due to energizing and loading the
transformer.

Universal Taps: A combination of six
primary voltage taps consisting of
2@+2-1/2% FCAN and 4@-2-1/2% FCBN.
Wye Connection: A standard 3-wire
transformer connection with similar
ends of single-phase coils connected
together. The common point forms
the electrical neutral point and may be
grounded. Also referred to as 3-phase
4-wire. To obtain the line-to-neutral
voltage, divide the line voltage by

3 (1.732).

Power Factor: the cosine of the phase
angle between a voltage and a current.

CA08101001E

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9

9-144

Transformers
General Purpose & Industrial Control Transformers
November 2003

Frequently Asked Questions

Vol. 1, Ref. No. [0444]

Frequently Asked Questions About Transformers
Can 60 Hz transformers be used at other
frequencies?
Transformers rated for 60 Hz can
be applied to circuits with a higher
frequency, as long as the nameplate
voltages are not exceeded. The higher
the frequency that you apply to a 60 Hz
transformer, the less voltage regulation you will have. 60 Hz transformers
may be used at lower frequencies but
only at reduced voltages corresponding to the reduction in frequency.For
example, a 480 to 120 volt 60 Hz transformer can carry rated kVA at 50 Hz but
ONLY when applied as a 400 to 100
volt transformer (50/60 x 480 = 400).

9

Can single-phase transformers be used
on a three-phase source?
Yes. Any single-phase transformer can
be used on a three-phase source by
connecting the primary terminals of
the single-phase transformer to any
two wires of a three-phase system.
It does not matter whether the threephase source is three-phase 3-wire
or three-phase 4-wire. The output of
the transformer will be single-phase.

Can transformers be used to create threephase power from a single-phase system?
No. Single-phase transformers alone
cannot be used to create the phaseshifts required for a three-phase system. Phase shifting devices (reactors
or capacitors) or phase converters in
conjunction with transformers are
required to change single-phase
power to three-phase.

What considerations need to be taken into
account when operating transformers
at high altitudes?
At altitudes greater than 3,300 feet
(1,000 meters), the density of the air
is lesser than at lower elevations. This
reduces the ability of the air surrounding a transformer to cool it, so the
temperature rise of the transformer
is increased. Therefore, when a transformer is being installed at altitudes
greater than 3,300 feet above sea level,
it is necessary to derate the nameplate
kVA by 0.3% for each 330 feet (100
meters) in excess of 3,300 feet.







What considerations need to be taken into
account when operating transformers
where the ambient temperature is high?
Eaton’s Cutler-Hammer dry-type transformers are designed in accordance
with ANSI standards to operate in
areas where the average maximum
ambient temperature is 40°C. For operation in ambient temperatures above
40°C, there are two options:
1. Order a custom designed transformer made for the specific
application.
2. Derate the nameplate kVA of a
standard transformer by 8% for
each 10°C of ambient above 40°C.

What is the normal life expectancy of
a transformer?
When a transformer is operated under
ANSI/IEEE basic loading conditions
(ANSI C57.96), the normal life expectancy of a transformer is 20 years. The
ANSI/IEEE basic loading conditions are:
A. The transformer is continuously
loaded at rated kVA and rated
voltages.
B. The average temperature of the
ambient air during any 24-hour
period is equal to 30°C and at
no time exceeds 40°C
C. The altitude where the transformer
is installed does not exceed 3,300
feet (1,000 meters).

What are Insulation Classes?
Insulation classes were originally used
to distinguish insulating materials
operating at different temperatures.
In the past, letters were used for the
different designations. Recently, insulation system temperatures (°C) have
replaced the letters’ designations.
Table 9-170. Insulation Classes
Previous
Designation

Insulation
System
Rating (°C)

Class A
Class B
Class F

105
150
180

Class H
Class R

220
220

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How do you know if the enclosure
temperature is too hot?
UL and CSA standards strictly regulate
the highest temperature that an
enclosure can reach. For ventilated
transformers, the temperature of the
enclosure should not increase by more
than 50°C in a 40°C ambient at full rated
current. For encapsulated transformers,
the temperature of the enclosure
should not increase by more than 65°C
in a 25°C ambient at full rated current.
This means that it is permissible for the
temperature of the enclosure to reach
90°C (194°F). Although this temperature
is very warm to the touch, it is within
the allowed standards. A thermometer
should be used to measure enclosure
temperatures, not your hand.

Can transformers be reverse-connected
(reverse-fed)?
Yes, with limitations. Cutler-Hammer
single-phase transformers rated 3 kVA
and larger can be reverse-connected
without any loss of kVA capacity or
any adverse effects. Transformers
rated 2 kVA and below, because there
is a turns ratio compensation on the
low voltage winding that adjusts voltage between no load and full load conditions, should not be reverse-fed.
Three-phase transformers with either
delta-delta or delta-wye configurations
can also be reverse-connected for
step-up operation. When reversefeeding a delta-wye connected transformer, there are two important considerations to take into account: (1)
The neutral is not connected, only the
three-phase wires of the wye system
are connected, (2) the ground strap
between X0 and the enclosure must be
removed. Due to high inrush currents
that may be created in these applications, it is recommended that you do
not reverse-feed transformers rated
more than 75 kVA. The preferred solution is to purchase a Cutler-Hammer
step up transformer designed specifically for your application.

CA08101001E

Transformers
General Purpose & Industrial Control Transformers

9-145

November 2003

Frequently Asked Questions

Vol. 1, Ref. No. [0445]

Can transformers be connected in parallel?
Yes, with certain restrictions. For single-phase transformers
being connected in parallel, the voltages and impedances of the
transformers must be equal (impedances must be within 7.5%
of each other). For three-phase transformers, the same restrictions apply as for single-phase transformers, plus the phase
shift of the transformers must be the same. For example, a
delta-wye-connected transformer (30° phase shift) must be
connected in parallel with another delta-wye-connected transformer, not a delta-delta connected transformer (0° phase shift).

Why is the impedance of a transformer important?
The impedance of a transformer is important because it is
used to determine the interrupting rating and trip rating of
the circuit protection devices on the load or line side of the
transformer. To calculate the maximum short circuit current
on the load side of a transformer, use the following formula:
Load Current (Amps)
Maximum Short Circuit = Full
------------------------------------------------------------------Transformer Impedence
Load Current (Amps)
Full load current for single-phase circuits is:
Nameplate Volt-Amps
----------------------------------------------------------Load (output) Voltage
and for three-phase circuits the full load current is:

Nameplate Volt-Amps
-------------------------------------------------------------------Load (output) Volts × 3
Example: For a standard three-phase, 75 kVA transformer,
rated 480 volt delta primary and 208Y/120 volt secondary
(catalog number V48M28T75J) and impedance equal to
5.1%, the full load current is:
75,000 VA
--------------------------------= 208.2 A

The circuit breaker or fuse on the secondary side of this
transformer would have to have a minimum interrupting
capacity of 4,083 amperes at 208 volts. NEMA ST-20 (1992).
A similar transformer with lower impedance would require
a primary circuit breaker or fuse with a higher interrupting
capacity.

What clearances are required around transformers when they
are installed?
All dry-type transformers depend upon the circulation of
air for cooling, therefore it is important that the flow of air
around a transformer not be impeded. UL 1561 requires that
there be no less than 6 inches (152.4 mm) clearance between
any side of a transformer with ventilation openings and any
wall or obstruction. In compliance with NEC 450-9, Eaton’s
Cutler-Hammer ventilated transformers have a note on their
nameplates requiring a minimum of 6 inches (152.4 mm)
clearance from the ventilation openings and walls or other
obstructions. This clearance only addresses the ventilation
needs of the transformer. There may be additional local
codes and standards that affect installation clearances.
Transformers should not be mounted in such a manner that
one unit will contribute to the additional heating of another
unit, beyond allowable temperature limits…for example
where two units are mounted on a wall one above the other.

NEMA is the registered trademark and service mark of the
National Electrical Manufacturers Association. UL is a federally registered trademark of Underwriters Laboratories Inc.
Uniform Building Code (UBC) is a trademark of the International Conference of Building Officials (ICBO). CSA is a registered trademark of the Canadian Standards Association.
National Electrical Code and NEC are registered trademarks
of the National Fire Protection Association, Quincy, Mass.

208V x 1.732

The maximum short circuit load current is:
208.2 A
------------------- = 4,082.4 A
.051

CA08101001E

For more information visit: www.cutler-hammer.eaton.com







9

9-146

Transformers
November 2003
Vol. 1, Ref. No. [0446]

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9







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CA08101001E



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