09_Nov03_ Brochure

November 2003

CA08101001E For more information visit:

www.cutler-hammer.eaton.com

Contents

Transformers 9-1

9

Vol. 1, Ref. No. [0301]

Transformers

Description Page

General Purpose Transformers

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

9-2

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

9-8

Three-Phase, Types EPT, DT-3, 50/60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-19

Electrostatically Shielded Transformers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-26

Energy Efﬁcient Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31

NEMA TP-1-1996 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-33

Low Temperature Rise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-36

Energy Efﬁcient Harmonic MitigatingTransformers . . . . . . . . . . . . . . . . . . . 9-38

K Factor Transformers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-41

Drive Isolation Transformers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-50

Mini-Power Centers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-57

Totally Enclosed Non-Ventilated Transformers

. . . . . . . . . . . . . . . . . . . . . . .

9-59

Class I, Division 2, Groups C and D Transformers

. . . . . . . . . . . . . . . . . . . . .

9-61

Open Type Core and Coil Assembly Transformers

. . . . . . . . . . . . . . . . . . . . .

9-63

Filtered Noise Isolation Transformers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-65

Low Sound Transformers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-67

Marine Duty Transformers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-70

Buck-Boost Transformers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-72

Autotransformer

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-88

Industrial Control Transformers

Type MTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-89

Type MTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-94

Type MTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-96

Type MTK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-105

CE Marked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-110

Type AP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-118

General Purpose and Industrial Control Transformers

Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-120

Technical Data and Speciﬁcations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-122

Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-136

Catalog Numbering System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-138

Price Modiﬁcations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-141

Glossary of Transformer Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-142

Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-144

Dry-Type Transformer Family



November 2003

9-2

For more information visit:

www.cutler-hammer.eaton.com

CA08101001E

Transformers

9

General Purpose Transformers

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

Vol. 1, Ref. No. [0302]

Single-Phase, Types EP,

DS-3, 60 Hz

Type EP 3-25 kVA

Product Description

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

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 com-

mercial, institutional, industrial,

and residential structures.

Features, Beneﬁts

and Functions

■

UL



listed.

■

60 Hz operation.

■

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 seismi-

cally qualiﬁed, and exceed require-

ments 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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 transform-

ers, Type DS-3, utilize a NEMA 2 rated

(drip-proof) enclosure as standard,

and are rated NEMA 3R with the addi-

tion 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 installa-

tion will likely be higher due to electri-

cal 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

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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



November 2003

CA08101001E For more information visit:

www.cutler-hammer.eaton.com

9-3

Transformers

9

General Purpose Transformers

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

Vol. 1, Ref. No. [0303]

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.

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

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 “/” designa-

tion, a mid-point also becomes avail-

able 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, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business.



November 2003

9-4

For more information visit:

www.cutler-hammer.eaton.com

CA08101001E

Transformers

9

General Purpose Transformers

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



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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

120 x 240 Volts to 120/240 Volts



.5

1

1.5

—

EP

115

6-1/2

8-3/8

10-3/4

4-7/8

6

6-3/16

4-5/8

5-3/4

6-1/8

13

31

40

165

213

273

124

152

157

117

146

156

6

14

18

FR57

FR59A

FR67

3E

Indoor-

Outdoor

—

S10N11S51N

S10N11S01N

S10N11S16N

400.

720.

890.

2

3

5

—

EP

115

10-3/4

14-1/8

16

6-3/16

7-3/4

10-3/8

6-1/8

8

9-7/8

40

65

113

273

359

406

157

197

263

156

203

251

18

29

51

FR68

FR176

FR177

3E

Indoor-

Outdoor

—

S10N11S02N

S10N11S03N

S10N11S05N

965.

1,050.

1,425.

7.5

10

15

25

—

EP

115

16

19

22-3/8

10-3/8

13-3/8

16-3/8

9-7/8

10-1/2

14-1/2

123

191

216

375

406

482

568

263

339

416

251

266

368

55

87

98

170

FR178

FR179

FR180

FR182

3E

Indoor-

Outdoor

—

S10N11S07N

S10N11S10N

S10N11S15N

S10N11S25N

1,830.

2,225.

2,780.

4,370.

37.5

50



DS-3

150

37-5/8

22-5/8

19-1/2

306

340

956

574

495

139

154

FR817

FR818

3XD

WS11

350.

T10P11S37

T10P11S50

5,490.

6,670.

208 Volts to 120/240 Volts



.5

1

1.5

—

EP

115

6-1/2

8-3/8

10-3/4

4-7/8

6

6-3/16

4-5/8

5-3/4

6-1/8

13

31

40

165

213

273

124

152

157

117

146

156

6

14

18

FR57

FR59A

FR67

26A

Indoor-

Outdoor

—

S29N11S51N

S29N11S01N

S29N11S16N

410.

625.

770.

2

3

5

—

EP

115

10-3/4

14-1/8

16

6-3/16

7-3/4

10-3/8

6-1/8

8

9-7/8

40

65

113

273

359

406

157

197

263

156

203

251

18

29

51

FR68

FR176

FR177

26A

Indoor-

Outdoor

—

S29N11S02N

S29N11S03N

S29N11S05N

985.

1,200.

1,775.

7.5

10

15

25

—

EP

115

16

19

22-3/8

10-3/8

13-3/8

16-3/8

9-7/8

10-1/2

14-1/8

123

193

216

375

406

482

568

263

339

416

251

266

359

55

87

98

170

FR178

FR179

FR180

FR182

26A

Indoor-

Outdoor

—

S29N11S07N

S29N11S10N

S29N11S15N

S29N11S25N

2,350.

2,830.

3,350.

4,780.

25

37.5

50

2@+2.5%

4@-2.5%

DS-3

150

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

306

340

793

956

574

445

495

96

139

154

FR816

FR817

FR818

260A

WS11

350.

T29M11S25

T29M11S37

T29M11S50

3,740.

4,580.

5,560.

75

100

2@+2.5%

1@+5%

4@-2.5%

2@-5%

DS-3

150

42-1/8

24

23-3/8

510

600

1070

610

594

232

272

FR819

FR820

260A

WS16

800.

T29M11S75

T29R11S99

7,860.

9,760.

277 Volts to 120/240 Volts



.5

1

1.5

—

EP

115

6-1/2

8-3/8

10-3/4

4-7/8

6

6-3/16

4-5/8

5-3/4

6-1/8

13

31

40

165

213

273

124

152

157

117

146

156

6

14

18

FR57

FR59A

FR67

514B

Indoor-

Outdoor

—

S27N11S51A

S27N11S01A

S27N11S16A

410.

625.

770.

2

3

5

—

EP

115

10-3/4

14-1/8

16

6-3/16

7-3/4

10-3/8

6-1/8

8

9-7/8

40

65

113

273

359

405

157

197

263

156

203

251

18

29

51

FR68

FR176

FR177

514B

Indoor-

Outdoor

—

S27N11S02A

S27N11S03N

S27N11S05N

985.

1,200.

1,775.

7.5

10

15

25

—

EP

115

16

19

22-3/8

10-3/8

13-3/8

16-3/8

9-7/8

10-1/2

14-1/8

123

193

216

375

406

482

568

263

339

416

251

266

359

55

87

98

170

FR178

FR179

FR180

FR182

514B

Indoor-

Outdoor

—

S27N11S07N

S27N11S10N

S27N11S15N

S27N11S25N

2,350.

2,830.

3,350.

4,780.

25

37.5

50

2@+2.5%

4@-2.5%

DS-3

150

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

306

340

793

956

574

445

495

96

139

154

FR816

FR817

FR818

262C

WS11

350.

T27M11S25

T27M11S37

T27M11S50

3,740.

4,580.

5,560.

75

100

2@+2.5%

4@-2.5%

DS-3

150

42-1/8

24

23-3/8

510

600

1070

610

594

232

272

FR819

FR820

262C

WS16

800.

T27M11S75

T27M11S99

7,860.

9,760.

Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . .

DT-1



November 2003

CA08101001E For more information visit:

www.cutler-hammer.eaton.com

9-5

Transformers

9

General Purpose Transformers

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



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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield

Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

240 x 480 Volts to 120/240 Volts

.050

.075

.100

—

EP

115

6-1/2

3-7/8

3-1/2

7

165

98

89

3

FR52

FR53

FR54

3A

Indoor-

Outdoor

—

S20N11S81N

S20N11S85N

S20N11S82N

75.

85.

95.

.150

.25

.5

—

EP

115

6-1/2

3-7/8

4-7/8

3-1/2

3-7/8

4-5/8

8

12

13

165

98

124

89

98

117

4

5

6

FR55

FR56

FR57

3A

Indoor-

Outdoor

—

S20N11S83N

S20N11S26N

S20N11S51N

110.

135.

170.

.75

1

1.5

—

EP

115

8-3/8

10-3/4

6

6-3/16

5-3/4

6-1/8

21

31

40

213

273

152

157

146

156

10

14

18

FR58A

FR59A

FR67

3A

Indoor-

Outdoor

—

S20N11S76N

S20N11S01N

S20N11S16N

220.

260.

320.

2

3

—



—



EP

115

10-3/4

14-1/8

6-3/16

7-3/4

6-1/8

8

40

65

273

359

157

197

156

203

18

29

FR68

FR176

3A

9A

Indoor-

Outdoor

—

S20N11S02N

S20N11S03N

S20K11S03N

410.

500.

525.

5

7.5

—



—



—

EP

115

16

10-3/8

9-7/8

113

123

406

263

251

51

55

FR177

FR178

3A

9A

3A

Indoor-

Outdoor

—

S20N11S05N

S20K11S05N

S20N11S07N

740.

775.

980.

7.5

10



—



—



EP

115

16

19

10-3/8

13-3/8

9-7/8

10-1/2

123

193

406

482

263

339

251

266

55

87

FR178

FR179

9A

3A

9A

Indoor-

Outdoor

—

S20K11S07N

S20N11S10N

S20K11S10N

1,030.

1,180.

1,240.

15

25

—



—



—

EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/2

216

375

482

568

339

416

266

368

98

170

FR180

FR182

3A

23A

3A

Indoor-

Outdoor

—

S20N11S15N

S20L11S15N

S20N11S25N

1,540.

1,600.

1,900.

25

37.5



EP

115

22-3/8

28-1/4

16-3/8

22-5/8

14-1/2

14-5/8

375

950

568

717

416

575

368

371

170

432

FR182

FR300A

23A

Indoor-

Outdoor

—

S20L11S25N

S20L11S37

2,250.

9,400.

15

25

37.5



DS-3

150

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

147

212

306

768

793

956

428

574

402

445

495

67

96

139

FR815

FR816

FR817

3XA

WS15

WS11

350.

T20P11S15

T20P11S25

T20P11S37

1,440.

1,870.

2,290.

50

75

100

167



2@+2.5%



4@-2.5%

DS-3

150

37-5/8

42-1/8

62-1/2

22-5/8

24

30

19-1/2

23-3/8

34

340

510

600

1200

956

1070

1597

574

610

762

495

594

863

154

232

272

545

FR818

FR819

FR820

FR814

3XA

288A

WS11

WS16

WS13

350.

800.

T20P11S50

T20P11S75

T20P11S99

T48M11S67D



3,220.

3,930.

4,880.

9,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-6

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

NEMA 3R, 316 stainless steel enclosure.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

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

115

10-3/4

11-1/8

6-1/8

7-3/4

6-5/8

8

42

46

70

273

281

155

197

166

203

19

21

33

FR67

FR176

538A

Indoor-

Outdoor

—

S40N14S51CE

S40N14S01CE

S40N14S16CE

S40N14S02CE

760.

830.

1,030.

1,225.

3

5

7.5

—

EP

115

12-7/8

15-7/8

10-3/8

13-3/8

9-7/8

10-5/8

113

140

193

326

402

264

340

251

267

51

63

87

FR177

FR178

FR179

538A

Indoor-

Outdoor

—

S40N14S03CE

S40N14S05CE

S40N14S07CE

1,570.

2,000.

2,625.

10

15

—

EP

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

Indoor-

Outdoor

—

S40N14S10CE

S40N14S15CE

3,160.

4,060.

240 x 480 Volts to 120/240 Volts Stainless Steel 

3

5

7.5

—

EP

115

14-1/8

16

7-11/16

10-3/8

8

9-7/8

65

113

123

359

406

195

263

203

251

29

51

55

FR176

FR177

FR178

3A

Indoor-

Outdoor

—

S20N11S03SS

S20N11S05SS

S20N11S07SS

750.

1,110.

1,470.

10

15

25

—

EP

115

19

21-5/16

13-3/8

16-3/8

10-1/2

14-1/8

179

216

375

482

566

339

416

266

359

87

98

170

FR179

FR180

FR182

3A

Indoor-

Outdoor

—

S20N11S10SS

S20N11S15SS

S20N11S25SS

1,770.

2,200.

2,850.

480 Volts to 120/240 Volts

1

1.5

2

—

2@-5%

EP

115

8-3/8

10-3/4

6

6-3/16

5-3/4

6-1/8

31

40

213

273

152

157

146

156

14

18

FR59A

FR67

FR68

2D

Indoor-

Outdoor

—

S48G11S01N

S48G11S16N

S48G11S02N

312.

385.

495.

3

5

—

2@+2.5%

—

2@-5%

2@+2.5%

2@-5%

EP

115

14-1/8

16

7-3/4

10-3/8

8

9-7/8

65

113

359

406

197

263

203

251

29

51

FR176

FR177

2D

16A

2D

Indoor-

Outdoor

—

S48G11S03N

S48D11S03N

S48G11S05N

600.

890.

5

7.5

2@+2.5%

—

2@+2.5%

2@-5%

2@+2.5%

EP

115

16

10-3/8

9-7/8

113

123

406

263

251

51

55

FR177

FR178

16A

2D

16A

Indoor-

Outdoor

—

S48D11S05N

S48G11S07N

S48D11S07N

890.

1,180.

10

15

—

2@+2.5%

—

2@-5%

2@+2.5%

2@-5%

EP

115

19

13-3/8

10-1/2

193

216

482

339

266

87

98

FR179

FR180

2D

16A

2D

Indoor-

Outdoor

—

S48G11S10N

S48D11S10N

S48G11S15N

1,415.

1,850.

15

25

2@+2.5%

—

2@+2.5%

2@-5%

4@-2.5%

EP

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

Indoor-

Outdoor

—

S48D11S15N

S48G11S25N

S48M11S25N

1,850.

2,395.

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

10

15

25

2@+2.5%

4@-2.5%

EP

115

19

20-3/4

13-3/8

19-1/8

10-1/2

13-5/8

208

235

175

482

525

339

483

266

349

94

106

80

FR179

FR180

FR132

16A

83A

Indoor-

Outdoor

—

S48D11S10SSCU

S48D11S15SSCU

S48M11S25SSCU

2,620.

3,500.

4,430.

600 Volts to 120/240 Volts

.5

.75

1

—

2@-5%

EP

115

6-1/2

8-3/8

4-7/8

6

4-5/8

5-3/4

13

21

31

165

213

124

152

117

146

6

10

14

FR57

FR58A

FR59A

2I

Indoor-

Outdoor

—

S60G11S51N

S60G11S76N

S60G11S01N

255.

330.

390.

1.5

2

3

—

2@-5%

EP

115

10-3/4

14-1/8

6-3/16

7-3/4

6-1/8

8

40

65

273

359

157

197

156

203

18

29

FR67

FR68

FR176

2I

Indoor-

Outdoor

—

S60G11S16N

S60G11S02N

S60G11S03N

475.

610.

740.

5

7.5

10

—

2@-5%

EP

115

16

19

10-3/8

13-3/8

9-7/8

10-1/2

113

123

193

406

482

263

339

251

266

51

55

87

FR177

FR178

FR179

2I

Indoor-

Outdoor

—

S60G11S05N

S60G11S07N

S60G11S10N

1,110.

1,460.

1,760.

15

25

—

2 @ 2.5%

4@-2.5%

EP

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

83B

Indoor-

Outdoor

—

S60J11S15N

S60J11S25N

S60M11S25N

2,400.

2,825.

25

37.5

50

2@+2.5%

4@-2.5%

DS-3

150

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

306

340

793

956

574

445

495

96

139

154

FR816

FR817

FR818

276B

WS11

350.

T60M11S25B

T60M11S37

T60M11S50D

2,240.

2,750.

3,340.

75

100

167

2@+2.5%

4@-2.5%

DS-3

150

42-1/8

62-7/8

24

30

23-3/8

34

510

600

1200

1070

1597

610

762

594

863

232

272

545

FR819

FR820

FR814

276B

288B

WS16

WS13

800.

T60M11S75

T60M11S99

T60M11S67A

4,720.

5,860.

11,400.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-7

Transformers

9

General Purpose Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

2400 Volts to 120/240 Volts

1.5 — — EP 115 10-3/4 6-3/16 6-1/8 40 273 157 156 181 FR68 18A Recom-

mended

Indoor

Only

—

S42N11S16N 3,100.

3

5

10

15

25

—

4@-2.5%

EP

115

16

19

22-3/8

26-3/8

10-3/8

13-3/8

16-3/8

9-7/8

10-1/2

14-1/8

113

123

216

375

405

406

482

566

668

263

339

416

251

266

359

51

55

87

170

183

FR177

FR178

FR179

FR182

FR190

12A

Recom-

mended

Indoor

Only

—

S42J11S03N 

S42J11S05N 

S42J11S10N 

S42J11S15N 

S42J11S25N 

3,290.

3,460.

4,930.

5,830.

8,270.

37.5

50

75

100

2@+2.5%

2@-2.5%

DS-3

150

28

30

36

22

24

27

20

26

300

420

500

570

684

732

879

537

586

659

488

635

137

191

228

260



Recom-

mended

Indoor

Only

—

T42D11S37 

T42D11S50 

T42D11S75 

T42D11S99 

5,500.

6,350.

7,860.

8,600.

2400 Volts to 240/480 Volts

37.5

50

2@+2.5%

2@-2.5%

DS-3

150

28

30

22

24

20

26

300

420

684

732

537

586

488

635

137

191



Recom-

mended

Indoor

Only

—

T42D21S37 

T42D21S50 

5,500.

6,350.

4160 Volts to 120/240 Volts

1.5 — — EP 115 10-3/4 6-3/16 6-1/8 40 273 157 156 181 FR68 524G Recom-

mended

Indoor

Only

—

S46N11S16N 2,580.

3

5

10

15

—

4@-2.5%

EP

115

16

19

22-5/16

10-3/8

13-3/8

16-3/8

9-7/8

10-1/2

14-1/8

113

123

193

375

406

482

566

263

339

416

251

266

359

51

55

87

170

FR177

FR178

FR179

FR182

12B

Recom-

mended

Indoor

Only

—

S46J11S03N 

S46J11S05N 

S46J11S10A 

S46J11S15A 

3,295.

3,460.

4,930.

5,830.

25

37.5

50

2@+2.5%

2@-2.5%

DS-3

150

28

30

22

24

20

26

280

300

420

984

684

732

537

586

488

635

128

137

191



Recom-

mended

Indoor

Only

—

T46D11S25 

T46D11S37 

T46D11S50 

4,800.

5,500.

6,350.

75

100

167

2@+2.5%

2@-2.5%

DS-3

150

30

36

50

24

27

33

26

35

500

570

1000

732

879

1220

586

659

806

635

854

228

260

455



Recom-

mended

Indoor

Only

—

T46D11S75 

T46D11S99 

T46D11S67 

7,860.

8,600.

16,800.

4160 Volts to 240/480 Volts

37.5

50

75

100

2@+2.5%

2@-2.5%

DS-3

150

28

30

36

22

24

27

20

26

300

420

500

570

684

732

879

537

586

659

488

635

137

191

228

260



Recom-

mended

Indoor

Only

—

T46D21S37 

T46D21S50 

T46D21S75 

T46D21S99 

5,500.

6,350.

7,860.

8,600.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-8

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

Three-Phase, Types EPT, DT-3, 60 Hz Vol. 1, Ref. No. [0308]

Three-Phase, Types EPT,

DT-3, 60 Hz

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.

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 com-

mercial, institutional, industrial and

residential structures.

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 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 seismi-

cally qualiﬁed, and exceed require-

ments 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature rise with nameplate loading.

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

Transformers

November 2003

9

General Purpose Transformers

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

Vol. 1, Ref. No. [0309]

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-7. 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.

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 trans-

formers, Type EPT, utilize a NEMA 3R

rated enclosure as standard.

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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 9-8. Average Sound Levels

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 recom-

mends external cables be rated 90°C

(sized at 75°C ampacity) for encapsu-

lated designs and 75°C for ventilated

designs.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.



November 2003

9-10

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

Refer to your Cutler-Hammer sales ofﬁce.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

208 ∆ Volts to 480Y/277 Volts

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

140

FR909

FR910A

FR912A

280E

WS31

350.

V29M47T15N

V29M47T30N

V29M47T45N

2,030.

2,590.

3,150.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

660

486

585

217

272

344

FR914B

FR915B

FR916A

280E

WS33

WS19

350.

V29M47T75N

V29M47T12N

V29M47T49N

4,460.

6,450.

8,100.

225

300

500

1@+5%

—

2@-5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

1581

1905

794

1130

768

914

728

1088

FR918A

FR919

333B

290B

WS34

WS35

800.

1,360.

V29R47T22N

V29R47T33N

V29G47T55N

11,850.

15,000.

22,400.

220 ∆ Volts to 190Y/110 Volts

3

6

9

—

2@-5%

EPT

115

13-3/8

15-7/8

15-15/16

16-1/2

8-5/16

9-7/8

116

143

166

340

403

405

419

211

251

53

65

75

FR201

FR200

FR103

70I

Indoor-

Outdoor

—

Y25G19T03A

Y25G19T06A

Y25G19T09A

1,380.

1,680.

2,170.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

17-3/8

26-5/8

26-1/2

19-11/16

25-1/4

28-1/2

10-7/16

12-3/4

14-5/8

275

422

660

442

676

673

500

638

724

265

324

372

125

191

299

FR95

FR243

FR244



Indoor-

Outdoor

—

Y25G19T15A

Y25M19T30A

Y25M19T45A

2,730.

5,200.

6,500.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280Q

WS31

350.

V25M19T15A

V25M19T30A

V25M19T45A

1,825.

2,330.

2,840.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280Q

WS33

WS19

350.

V25M19T75A

V25M19T12A

V25M19T49A

4,010.

5,800.

7,290.

225

300

500

1@+5%

—

2@-5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

1581

1905

794

1130

768

914

728

1088

FR918A

FR919

289F

WS34

WS35

800.

1,360.

V25R19T22A

V25R19T33A

V25G19T55A

10,660.

13,500.

21,600.

220 ∆ Volts to 208Y/120 Volts

3

6

9

—

2@-5%

EPT

115

13-3/8

15-7/8

15-15/16

16-1/2

8-5/16

9-7/8

116

143

166

340

403

405

419

211

251

53

65

75

FR201

FR200

FR103

70Q

Indoor-

Outdoor

—

Y25G28T03A

Y25G28T06A

Y25G28T09A

1,590.

1,935.

1,700.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

17-3/8

26-3/8

26-1/2

19-11/16

25-1/4

28-1/2

10-7/16

12-3/4

14-5/8

275

422

660

442

676

673

500

638

724

265

324

372

125

191

299

FR95

FR243

FR244

70Q

84AF

Indoor-

Outdoor

—

Y25G28T15A

Y25M28T30A

Y25M28T45A

2,510.

6,000.

7,500.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280Q

WS31

350.

V25M28T15A

V25M28T30A

V25M28T45A

1,825.

2,330.

2,840.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280Q

WS33

WS19

350.

V25M28T75A

V25M28T12A

V25M28T49A

4,010.

5,800.

7,290.

225

300

500

1@+5%

—

2@-5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

289F

WS34

WS35

800.

1,360.

V25R28T22A

V25R28T33A

V25G28T55A

10,660.

13,500.

21,600.

220 ∆ Volts to 380Y/220 Volts

3

6

9

—

2@-5%

EPT

115

13-3/8

15-7/8

15-15/16

16-1/2

8-5/16

9-7/8

116

143

166

340

403

405

419

211

251

53

65

75

FR201

FR200

FR103

70X

Indoor-

Outdoor

—

Y25G37T03A

Y25G37T06A

Y25G37T09A

1,590.

1,935.

2,505.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

17-3/8

26-5/8

26-1/2

19-11/16

25-1/4

28-1/2

10-7/16

12-3/4

14-5/8

275

422

660

442

676

673

500

638

724

265

324

372

125

191

299

FR95

FR243

FR244

70X

84AF

Indoor-

Outdoor

—

Y25G37T15A

Y25M37T30A

Y25M37T45A

3,150.

6,000.

7,500.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280Q

WS31

350.

V25M37T15A

V25M37T30A

V25M37T45A

1,890.

2,415.

2,940.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280Q

WS33

WS19

350.

V25M37T75A

V25M37T12A

V25M37T49A

4,155.

6,020.

7,560.

225

300

500

1@+5%

—

2@-5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

289F

WS34

WS35

800.

1,360.

V25R37T22A

V25R37T33A

V25G37T55A

11,060.

14,000.

21,600.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-11

Transformers

9

General Purpose Transformers

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

Floor mount only.

Refer to your Cutler-Hammer sales ofﬁce.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Diagram

Wiring

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

240 ∆ Volts to 208Y/120 Volts

9

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

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

70C

84C

Indoor-

Outdoor

—

Y24G28T09N

Y24G28T15N

Y24M28T30N

Y24M28T45N

2,510.

3,150.

6,000.

7,500.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

140

FR909

FR910A

FR912A

280C

WS31

350.

V24M28T15B

V24M28T30N

V24M28T45N

1,825.

2,330.

2,840.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

486

585

217

272

344

FR914B

FR915B

FR916A

280C

WS33

WS19

350.

V24M28T75N

V24M28T12N

V24M28T49N

4,010.

5,800.

7,290.

225

300

500

1@+5%

—

2@-5%

DT-3

150

62-1/4

64-1/4

75

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

728

1088

FR918A

FR919

289A

290A

WS34

WS35

800.

1,360.

V24R28T22N

V24R28T33N

V24G28T55N

10,660.

15,600.

22,600.

380 ∆ Volts to 190Y/110 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70F

Indoor-

Outdoor

—

Y38G19T03A

Y38G19T06A

Y38G19T09A

Y38G19T15A

1,220.

1,480.

1,920.

2,415.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84AC

Indoor-

Outdoor

—

Y38M19T30A

Y38M19T45A

Y38M19T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280L

WS31

350.

V38M19T15A

V38M19T30A

V38M19T45A

1,800.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280L

WS33

WS19

350.

V38M19T75A

V38M19T12A

V38M19T49A

3,400.

4,900.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280L



WS34

WS35

800.

1,360.

V38M19T22A

V38M19T33A

V38M19T55A

9,100.

11,500.

18,500.

380 ∆ Volts to 208Y/120 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70D

Indoor-

Outdoor

—

Y38G28T03A

Y38G28T06A

Y38G28T09A

Y38G28T15A

1,275.

1,550.

2,005.

2,520.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84R

Indoor-

Outdoor

—

Y38M28T30A

Y38M28T45A

Y38M28T75A 

4,600.

5,750.

7,130.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280L

WS31

350.

V38M28T15A

V38M28T30A

V38M28T45A

1,800.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280L

WS33

WS19

350.

V38M28T75A

V38M28T12A

V38M28T49A

3,400.

4,900.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280L



WS34

WS35

800.

1,360.

V38M28T22A

V38M28T33A

V38M28T55A

9,100.

11,500.

18,500.

380 ∆ Volts to 220Y/127 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70F

Indoor-

Outdoor

—

Y38G31T03A

Y38G31T06A

Y38G31T09A

Y38G31T15A

1,220.

1,480.

1,920.

2,415.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84R

Indoor-

Outdoor

—

Y38M31T30A

Y38M31T45A

Y38M31T75A 

4,600.

5,750.

7,130.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280L

WS31

350.

V38M31T15A

V38M31T30A

V38M31T45A

1,800.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280L

WS33

WS19

350.

V38M31T75A

V38M31T12A

V38M31T49A

3,400.

4,900.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280L

275H

WS34

WS35

800.

1,360.

V38M31T22A

V38M31T33A

V38M31T55A

9,100.

11,500.

18,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-12

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

Refer to your Cutler-Hammer sales ofﬁce.

Floor mount only.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

380 ∆ Volts to 220 ∆ Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

74K

Indoor-

Outdoor

—

Y38G25T03A

Y38G25T06A

Y38G25T09A

Y38G25T15A

1,220.

1,480.

1,920.

2,415.

30

45

75

2@+2.5%

4@-2.5%

EPT

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



Indoor-

Outdoor

—

Y38M25T30A

Y38M25T45A

Y38M25T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

281D

WS31

350.

V38M25T15A

V38M25T30A

V38M25T45A

1,800.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

281D

WS33

WS19

350.

V38M25T75A

V38M25T12A

V38M25T49A

3,400.

4,900.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

281D



WS34

WS35

800.

1,360.

V38M25T22A

V38M25T33A

V38M25T55A

9,100.

11,500.

18,500.

380 ∆ Volts to 380Y/220 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70D

Indoor-

Outdoor

—

Y38G37T03A

Y38G37T06A

Y38G37T09A

Y38G37T15A

1,380.

1,670.

2,170.

2,730.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84H

Indoor-

Outdoor

—

Y38M37T30A

Y38M37T45A

Y38M37T75A 

5,200.

6,500.

8,060.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280L

WS31

350.

V38M37T15A

V38M37T30A

V38M37T45A

1,890.

2,415.

2,940.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280L

WS33

WS19

350.

V38M37T75A

V38M37T12A

V38M37T49A

4,160.

6,020.

7,560.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280L



WS34

WS35

800.

1,360.

V38M37T22A

V38M37T33A

V38M37T55A

11,060.

14,000.

22,400.

380 ∆ Volts to 480Y/277 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70F

Indoor-

Outdoor

—

Y38G47T03A

Y38G47T06A

Y38G47T09A

Y38G47T15A

1,590.

1,935.

2,505.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84AB

Indoor-

Outdoor

—

Y38M47T30A

Y38M47T45A

Y38M47T75A 

6,000.

7,500.

9,300.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280L

WS31

350.

V38M47T15A

V38M47T30A

V38M47T45A

2,090.

2,675.

3,260.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280L

WS33

WS19

350.

V38M47T75A

V38M47T12A

V38M47T49A

4,600.

6,665.

8,370.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280L



WS34

WS35

800.

1,360.

V38M47T22A

V38M47T33A

V38M47T55A

12,245.

15,500.

24,800.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-13

Transformers

9

General Purpose Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

416 ∆ Volts to 208Y/120 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70V

Indoor-

Outdoor

—

Y43G28T03A

Y43G28T06A

Y43G28T09A

Y43G28T15A

1,275.

1,550.

2,005.

2,520.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84I

Indoor-

Outdoor

—

Y43M28T30A

Y43M28T45A

Y43M28T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280P

WS31

350.

V43M28T15A

V43M28T30A

V43M28T45A

1,800.

2,000.

2,530.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280P

WS33

WS19

350.

V43M28T75A

V43M28T12A

V43M28T49A

3,450.

4,950.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280P



WS34

WS35

800.

1,360.

V43M28T22A

V43M28T33A

V43M28T55A

9,080.

11,500.

18,500.

440 ∆ Volts to 220Y/127 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70G

Indoor-

Outdoor

—

Y44G31T03A

Y44G31T06A

Y44G31T09A

Y44G31T15A

1,590.

1,935.

2,505.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84O

Indoor-

Outdoor

—

Y44M31T30A

Y44M31T45A

Y44M31T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280J

WS31

350.

V44M31T15A

V44M31T30A

V44M31T45A

1,800.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280J

WS33

WS19

350.

V44M31T75A

V44M31T12A

V44M31T49A

3,420.

4,945.

6,220.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280J

275F

WS34

WS35

800.

1,360.

V44M31T22A

V44M31T33A

V44M31T55A

9,100.

11,500.

18,500.

480 ∆ Volts to 208Y/120 Volts

3

6

—

2@+2.5%

2@-5%

2@-2.5%

EPT

115

13-3/8

15-7/8

16

16-1/2

8-3/8

9-7/8

116

143

339

403

404

419

211

251

52

64

FR201

FR200

70A

72B

Indoor-

Outdoor

—

Y48G28T03N

Y48G28T06N

Y48D28T06N

1,060.

1,290.

9

—

2@+2.5%

2@-5%

4@-2.5%

2@-2.5%

EPT

115

15-7/8

16-1/2

9-7/8

166

403

419

251

75

FR103

70A

503A

72B

Indoor-

Outdoor

—

Y48G28T09N

Y48J28T09N

Y48D28T09N

1,670.

15

—

2@+2.5%

2@-5%

4@-2.5%

2@-2.5%

EPT

115

17-3/8

19-11/16

10-7/16

275

441

499

265

124

FR95

70A

72A

72B

Indoor-

Outdoor

—

Y48G28T15N

Y48J28T15N

Y48D28T15N

2,100.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

Indoor-

Outdoor

—

Y48M28T30N

Y48M28T45N

Y48M28T75N 

4,000.

5,000.

6,800.

15

30

37.5

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

239

310

635

765

511

359

69

108

140

FR909

FR910A

FR911A

280B

WS31

350.

V48M28T15B

V48M28T30K

V48M28T37K

1,350.

1,725.

2,040.

45

50

75

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

765

1000

511

663

359

485

486

140

217

FR912A

FR913B

FR914B

280B

WS31

WS33

350.

V48M28T45K

V48M28T50J

V48M28T75J

2,100.

2,920.

2,970.

112.5

150

225

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M28T12H

V48M28T49K

V48M28T22L

4,300.

5,400.

7,900.

300

500

750

1000

2@+2.5%

1@+3.5%

4@-2.5%

1@-3.5%

DT-3

150

62-1/4

75

68

31-1/4

44-1/2

64

30-1/4

36

45

1600

2400

2900

4350

1581

1905

1727

794

1130

1625

768

914

1143

728

1088

1315

1972

FR918A

FR919

FR920

280B

275A



WS34

WS35



800.

1,360.

—

V48M28T33K

V48M28T55G

V48M28T77F

V48W28T11G 

10,000.

16,000.

26,000.

46,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-14

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 208Y/120 Volts — Copper Windings

15

30

45

75

2@+2.5%

2@-2.5%

4@-2.5%

EPT

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

72B

84A

Indoor-

Outdoor

—

Y48D28T15CU

Y48M28T30CU

Y48M28T45CU

Y48M28T75CU 

2,860.

5,440.

6,800.

9,100.

15

30

45

75

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

172

300

370

550

635

765

1000

511

663

359

486

78

136

168

250

FR909

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M28T15CU

V48M28T30CU

V48M28T45CU

V48M28T75CU

2,000.

2,380.

2,890.

4,390.

112.5

150

225

300

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

56

62-1/4

26-1/8

28

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

WS33

WS19

WS34

350.

800.

V48M28T12CU

V48M28T49CU

V48M28T22CU

V48M28T33CU

6,000.

8,200.

11,030.

14,000.

500

750

1000

2@+2.5%

1@+3.5%

4@-2.5%

1@-3.5%

DT-3

150

75

68

44-1/2

64

36

45

3100

3600

5500

1905

1727

1130

1625

914

1143

1409

1636

2500

FR919

FR920



275A



WS35



1,360.

—

V48M28T55CU

V48M28T77CU

V48W28T11CU 

22,350.

38,000.

65,100.

480 ∆ Volts to 208Y/120 Volts Stainless Steel 

3

6

9

15

—

2@+2.5%

2@-5%

2@-2.5%

EPT

115

13-7/8

15-7/8

17-3/8

16

16-1/2

19-11/16

8-3/8

9-7/8

10-7/16

116

143

275

340

403

441

405

419

499

211

251

265

53

65

75

124

FR201

FR200

FR103

FR95

70A

72B

Indoor-

Outdoor

—

Y48G28T03SS

Y48D28T06SS

Y48D28T09SS

Y48D28T15SS

1,590.

1,935.

2,500.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

453

FR243

FR244

FR245

84A

Indoor-

Outdoor

—

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%

4@-2.5%

EPT

115

17-3/8

26-5/8

26-1/2

19-11/16

25-1/4

28-1/2

10-7/16

12-3/4

14-5/8

300

504

745

441

676

673

499

638

723

265

323

371

136

229

338

FR95

FR243

FR244

72B

84A

Indoor-

Outdoor

—

Y48D28T15SSCU

Y48M28T30SSCU

Y48M28T45SSCU

3,880.

7,400.

9,250.

480 ∆ Volts to 220Y/127 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8 5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70A

Indoor-

Outdoor

—

Y48G31T03A

Y48G31T06A

Y48G31T09A

Y48G31T15A

1,590.

1,935.

2,505.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84K

Indoor-

Outdoor

—

Y48M31T30A

Y48M31T45A

Y48M31T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20 1/8

20-1/8

14 1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280B

WS31

350.

V48M31T15A

V48M31T30A

V48M31T45A

1,550.

2,000.

2,415.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280B

WS33

WS19

350.

V48M31T75A

V48M31T12A

V48M31T49A

3,415.

4,945.

6,210.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M31T22A

V48M31T33A

V48M31T55A

9,100.

11,500.

18,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-15

Transformers

9

General Purpose Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

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

3

6

9

—

2@-5%

4@-2.5%

EPT

115

13-3/8

15-7/8

16

16-1/2

8-3/8

9-7/8

116

143

166

339

403

404

419

211

251

52

64

75

FR201

FR200

FR103

74A

73A

Indoor-

Outdoor

—

Y48G24T03N 

Y48G24T06N 

Y48J24T09N 

1,190.

1,450.

1,870.

15

30

45

—

2@+2.5%

4@-2.5%

EPT

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

Indoor-

Outdoor

—

Y48J24T15N 

Y48M24T30N 

Y48M24T45N 

2,350.

4,480.

5,600.

15

30

45

75

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

152

230

310

480

635

765

1000

511

663

359

486

69

104

140

217

FR909

FR910A

FR912A

FR914B

282B

WS31

WS33

350.

V48M22T15B

V48M22T30N

V48M22T45N

V48M22T75N

1,550.

2,000.

2,500.

3,420.

112.5

150

225

300

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

56

62-1/4

26-1/8

28-1/8

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

WS33

WS19

WS34

350.

800.

V48M22T12N

V48M22T49N

V48M22T22N

V48M22T33N

4,900.

6,210.

9,100.

11,500.

500

750

1000

2@+2.5%

1@+3.5%

4@-2.5%

1@-3.5%

DT-3

150

75

68

44-1/2

64

36

45

2400

2900

4350

1905

1727

1130

1625

914

1143

1088

1315

1972

FR919

FR920



291A



WS35



1,360.

—

V48M22T55N

V48M22T77N

V48W22T11N 

18,500.

32,600.

53,500.

480 ∆ Volts to 380Y/220 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70R

Indoor-

Outdoor

—

Y48G37T03A

Y48G37T06A

Y48G37T09A

Y48G37T15A

1,590.

1,935.

2,505.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84A

Indoor-

Outdoor

—

Y48M37T30A

Y48M37T45A

Y48M37T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280B

WS31

350.

V48M37T15A

V48M37T30A

V48M37T45A

1,800.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280B

WS33

WS19

350.

V48M37T75A

V48M37T12A

V48M37T49A

3,400.

4,900.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M37T22A

V48M37T33A

V48M37T55A

9,100.

11,500.

18,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-16

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

Floor mount only.

Refer to your Cutler-Hammer sales ofﬁce.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 380 ∆ Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

74B

Indoor-

Outdoor

—

Y48G38T03A

Y48G38T06A

Y48G38T09A

Y48G38T15A

1,590.

1,935.

2,505.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

85A

Indoor-

Outdoor

—

Y48M38T30A

Y48M38T45A

Y48M38T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

281B

WS31

350.

V48M38T15A

V48M38T30A

V48M38T45A

1,500.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

281B

WS33

WS19

350.

V48M38T75A

V48M38T12A

V48M38T49A

3,400.

4,900.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

281B

274B

WS34

WS35

800.

1,360.

V48M38T22A

V48M38T33A

V48M38T55A

9,100.

11,500.

18,500.

480 ∆ Volts to 416Y/240 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95

70A

Indoor-

Outdoor

—

Y48G51T03A

Y48G51T06A

Y48G51T09A

Y48G51T15A

1,590.

1,935.

2,505.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84E

Indoor-

Outdoor

—

Y48M51T30A

Y48M51T45A

Y48M51T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280B

WS31

350.

V48M51T15A

V48M51T30A

V48M51T45A

2,110.

2,350.

2,940.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280B

WS33

WS19

350.

V48M51T75A

V48M51T12A

V48M51T49A

4,000.

5,750.

8,040.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M51T22A

V48M51T33A

V48M51T55A

10,680.

13,500.

21,700.

480 ∆ Volts to 440Y/254 Volts

3

6

9

15

—

2@-5%

EPT

115

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201

FR200

FR103

FR95



Indoor-

Outdoor

—

Y48G35T03A

Y48G35T06A

Y48G35T09A

Y48G35T15A

1,590.

1,935.

2,505.

3,150.

30

45

75

2@+2.5%

4@-2.5%

EPT

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

84A

Indoor-

Outdoor

—

Y48M35T30A

Y48M35T45A

Y48M35T75A 

4,600.

5,750.

7,150.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

141

FR909

FR910A

FR912A

280B

WS31

350.

V48M35T15A

V48M35T30A

V48M35T45A

1,800.

2,000.

2,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

664

712

486

585

218

273

345

FR914B

FR915B

FR916A

280B

WS33

WS19

350.

V48M35T75A

V48M35T12A

V48M35T49A

3,400.

4,900.

6,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1088

FR917

FR918A

FR919

280B



WS34

WS35

800.

1,360.

V48M35T22A

V48M35T33A

V48M35T55A

9,100.

11,500.

18,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-17

Transformers

9

General Purpose Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 480Y/277 Volts

9

15

30

45

2@+2.5%

2@-2.5%

4@-2.5%

EPT

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

72C

84D

Indoor-

Outdoor

—

Y48D47T09N

Y48D47T15N

Y48M47T30N

Y48M47T45N

2,170.

2,730.

5,200.

6,500.

15

30

45

75

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

152

230

310

480

635

765

1000

511

663

359

486

69

104

140

217

FR909

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M47T15B

V48M47T30N

V48M47T45G

V48M47T75F

1,830.

2,330.

2,840.

4,010.

112.5

150

225

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M47T12E

V48M47T49F

V48M47T22F

5,810.

7,290.

10,670.

300

500

750

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280B

275A

WS34

WS35

800.

1,360.

V48M47T33E

V48M47T55F

V48M47T77A

13,500.

21,600.

35,100.

600 ∆ Volts to 208Y/120 Volts

9

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

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

70B

84B

Indoor-

Outdoor

—

Y60G28T09N

Y60G28T15N

Y60M28T30N

Y60M28T45N

2,000.

2,520.

4,800.

6,000.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

140

FR909

FR910A

FR912A

280A

WS31

350.

V60M28T15A

V60M28T30N

V60M28T45H

2,390.

2,990.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

486

585

217

272

344

FR914B

FR915B

FR916A

280A

WS33

WS19

350.

V60M28T75G

V60M28T12F

V60M28T49F

4,061.

5,860.

8,190.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

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

728

1088

FR917

FR918A

FR919

280A

275C

WS34

WS35

800.

1,360.

V60M28T22G

V60M28T33F

V60M28T55A

10,870.

13,740.

22,100.

600 ∆ Volts to 240 ∆ Volts

30

45

2@+2.5%

4@-2.5%

EPT

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

85B

Indoor-

Outdoor

—

Y60M24T30N

Y60M24T45N

5,000.

6,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

140

FR909

FR910A

FR912A

281A

WS31

350.

V60M24T15A

V60M24T30A

V60M24T45H

2,390.

2,990.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

486

585

217

272

344

FR914B

FR915B

FR916A

281A

WS33

WS19

350.

V60M24T75G

V60M24T12E

V60M24T49F

4,061.

5,860.

8,190.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

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

728

1088

FR917

FR918A

FR919

281A

274A

WS34

WS35

800.

1,360.

V60M24T22G

V60M24T33F

V60M24T55A

10,870.

13,740.

22,100.

2400 ∆ Volts to 208Y/120 Volts

3

6

9

2@+2.5%

2@-2.5%

EPT

115

10

11

12

18-7/8

25

29

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

Recom-

ended

Indoor

Only

—

Y42D28T03N 

Y42D28T06N 

Y42D28T09N 

5,630.

6,450.

8,070.

15

30

2@+2.5%

2@-2.5%

EPT

115

18-1/2

27-11/16

21

20-11/16

10-1/2

12

340

475

470

703

533

525

267

305

154

216

FR195

FR196

65B

Recom-

ended

Indoor

Only

—

Y42D28T15N 

Y42D28T30N 

10,200.

13,400.

45

75

112.5

2@+2.5%

2@-2.5%

DT-3

150

32-1/2

36

30

33

24

26

460

620

800

826

902

914

762

838

610

660

209

282

364



Recom-

ended

Indoor

Only

—

V42D28T45G 

V42D28T75H 

V42D28T12H 

7,500.

8,950.

9,450.

150

225

300

2@+2.5%

2@-2.5%

DT-3

150

36

50

51

33

39-3/4

26

37

980

1450

1620

914

1270

1010

838

1010

660

940

445

659

736



Recom-

ended

Indoor

Only

—

V42D28T49K 

V42D28T22J 

V42D28T33J 

11,400.

15,600.

21,000.

500

750

1000

2@+2.5%

2@-2.5%

DT-3

150

59

75

90

48-3/4

44-1/2

69

41

36

42

2400

3300

4500

1238

1905

2286

1238

1130

1753

1041

914

1067

1091

1498

2043



FR920

FR922



266A

Recom-

ended

Indoor

Only

—

V42D28T55G 

V42D28T77 

V42D28T11 

32,000.

42,000.

52,000.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-18

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

2400 ∆ Volts to 480Y/277 Volts 

45

75

112.5

2@+2.5%

2@-2.5%

DT-3

150

32-1/2

36

30

33

24

26

460

620

800

826

902

914

762

838

610

660

209

282

364



Recom-

mended

Indoor

Only

—

V42D47T45G

V42D47T75F

V42D47T12F

7,500.

8,950.

9,450.

150

225

300

2@+2.5%

2@-2.5%

DT-3

150

36

50

51

33

39-3/4

26

37

980

1450

1620

914

1270

1010

838

1010

660

940

445

659

736



Recom-

mended

Indoor

Only

—

V42D47T49G

V42D47T22H

V42D47T33G

11,400.

15,600.

21,000.

500

750

1000

2@+2.5%

2@-2.5%

DT-3

150

59



48-3/4



41



2400



1238



1238



1041



1091



Recom-

mended

Indoor

Only

—

V42D47T55H

V42D47T77

V42D47T11A

32,000.

42,000.

52,000.

4160 ∆ Volts to 208Y/120 Volts

3

6

9

2@+2.5%

2@-2.5%

EPT

115

10

11

12

18-7/8

25

29

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

Recom-

mended

Indoor

Only

—

Y46D28T03N 

Y46D28T06N 

Y46D28T09N 

5,800.

6,450.

8,070.

15

30

2@+2.5%

2@-2.5%

EPT

115

18-1/2

27-11/16

21

20-11/16

10-1/2

12

340

475

470

703

533

525

267

305

154

216

FR195

FR196

65C

Recom-

mended

Indoor

Only

—

Y46D28T15N 

Y46D28T30N 

10,200.

13,400.

45

75

112.5

150

2@+2.5%

2@-2.5%

DT-3

150

32-1/2

36

30

33

24

26

460

620

800

980

826

902

914

762

838

610

660

209

282

364

445



Recom-

mended

Indoor

Only

—

V46D28T45H 

V46D28T75H 

V46D28T12H 

V46D28T49K 

7,500.

8,950.

9,450.

11,400.

225

300

500

2@+2.5%

2@-2.5%

DT-3

150

50

51

59

39-3/4

48-3/4

37

41

1450

1620

2400

1270

1010

1238

1010

1238

940

1041

659

736

1091



Recom-

mended

Indoor

Only

—

V46D28T22J 

V46D28T33J 

V46D28T55H 

15,600.

21,000.

32,000.

750

1000

1500

2@+2.5%

2@-2.5%

DT-3

150



Recom-

mended

Indoor

Only

—

V46D28T77 

V46D28T11 

V46D28T14 

42,000.

52,000.

65,000.

4160 ∆ Volts to 240 ∆ Volts 

45

75

112.5

2@+2.5%

2@-2.5%

DT-3

150

32-1/2

36

30

33

24

26

460

620

800

826

902

914

762

838

610

660

209

282

364



Recom-

mended

Indoor

Only

—

V46D24T45F

V46D24T75F

V46D24T12F

7,500.

8,950.

9,450.

150

225

300

2@+2.5%

2@-2.5%

DT-3

150

36

50

51

33

39-3/4

26

37

980

1450

1620

914

1270

1010

838

1010

660

940

445

659

736



Recom-

mended

Indoor

Only

—

V46D24T49H

V46D24T22G

V46D24T33G

11,400.

15,600.

21,000.

500

750

1000

2@+2.5%

2@-2.5%

DT-3

150

59



48-3/4



41



2400



1238



1238



1041



1091



—



—



Recom-

mended

Indoor

Only

—

V46D24T55B

V46D24T77

V46D24T11A

32,000.

42,000.

52,000.

4160 ∆ Volts to 480Y/277 Volts 

45

75

112.5

2@+2.5%

2@-2.5%

DT-3

150

32-1/2

36

30

33

24

26

460

620

800

826

902

914

762

838

610

660

209

282

364



Recom-

mended

Indoor

Only

—

V46D47T45G

V46D47T75G

V46D47T12G

7,500.

8,950.

9,450.

150

225

300

2@+2.5%

2@-2.5%

DT-3

150

36

50

51

33

39-3/4

26

37

980

1450

1620

914

1270

1010

838

1010

660

940

445

659

736



Recom-

mended

Indoor

Only

—

V46D47T49J

V46D47T22H

V46D47T33H

11,400.

15,600.

21,000.

500

750

1000

2@+2.5%

2@-2.5%

DT-3

150

59



48-3/4



41



2400



1238



1238



1041



1091



Recom-

mended

Indoor

Only

—

V46D47T55H

V46D47T77

V46D47T11

32,000.

42,000.

52,000.

1500 2@+2.5% 2@-2.5% DT-3 150  

—

V46D47T14F 65,000.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-19

Transformers

9

General Purpose Transformers

Three-Phase, Types EPT, DT-3, 50/60 Hz

Vol. 1, Ref. No. [0319]

Three-Phase, Types EPT,

DT-3, 50/60 Hz

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.

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 com-

mercial, institutional, industrial and

residential structures.

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 distribu-

tion and control transformers are built

and tested in accordance with applica-

ble 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 seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature rise with nameplate loading.

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.



November 2003

9-20

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

Three-Phase, Types EPT, DT-3, 50/60 Hz Vol. 1, Ref. No. [0320]

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-18. 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.

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 trans-

formers, Type EPT, utilize a NEMA 3R

rated enclosure as standard.

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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 9-19. Average Sound Levels

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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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.



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-21

Transformers

9

General Purpose Transformers

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.

Refer to your Cutler-Hammer sales ofﬁce.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

380 ∆ Volts to 208Y/120 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70D

Indoor-

Outdoor

—

Y38G28T03X

Y38G28T06X

Y38G28T09X

1,600.

1,950.

2,525.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70D

84W

Indoor-

Outdoor

—

Y38G28T15X

Y38M28T30X

Y38M28T45X

3,175.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280L

WS31

WS33

350.

V38M28T15X

V38M28T30X

V38M28T45X

2,260.

2,520.

3,150.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

56

26-1/8

28

31-1/4

19-1/8

23

30-1/4

600

760

1100

1000

1171

1422

664

712

794

486

585

616

273

345

499

FR915B

FR916A

FR917

280L

WS33

WS19

WS34

350.

800.

V38M28T75X

V38M28T12X

V38M28T49X

4,280.

6,170.

9,100.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280L



WS34

WS35

800.

1,360.

V38M28T22X

V38M28T33X

V38M28T55X

11,500.

18,300.

23,100.

380 ∆ Volts to 220Y/127 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70F

Indoor-

Outdoor

—

Y38G31T03X

Y38G31T06X

Y38G31T09X

1,540.

1,860.

2,420.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70F

84H

Indoor-

Outdoor

—

Y38G31T15X

Y38M31T30X

Y38M31T45X

3,040.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280L

WS31

WS33

350.

V38M31T15X

V38M31T30X

V38M31T45X

2,270.

2,520.

3,150.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

280L

WS33

WS19

WS34

350.

800.

V38M31T75X

V38M31T12X

V38M31T49X

4,300.

6,170.

8,570.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280L

275H

WS34

WS35

800.

1,360.

V38M31T22X

V38M31T33X

V38M31T55X

11,375.

18,300.

23,100.

380 ∆ Volts to 380Y/220 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70D

Indoor-

Outdoor

—

Y38G37T03X

Y38G37T06X

Y38G37T09X

1,740.

2,100.

2,740.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70D

84H

Indoor-

Outdoor

—

Y38G37T15X

Y38M37T30X

Y38M37T45X

3,440.

6,550.

8,190.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280L

WS31

WS33

350.

V38M37T15X

V38M37T30X

V38M37T45X

2,380.

3,040.

3,700.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

280L

WS33

WS19

WS34

350.

800.

V38M37T75X

V38M37T12X

V38M37T49X

5,240.

7,580.

9,525.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280L



WS34

WS35

800.

1,360.

V38M37T22X

V38M37T33X

V38M37T55X

13,930.

17,640.

28,220.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-22

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

Refer to your Cutler-Hammer sales ofﬁce.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

380 ∆ Volts to 416Y/240 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95



Indoor-

Outdoor

—

Y38G51T03X

Y38G51T06X

Y38G51T09X

1,685.

2,440.

3,160.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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



Indoor-

Outdoor

—

Y38G51T15X

Y38M51T30X

Y38M51T45X

3,970.

7,560.

9,450.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280L

WS31

WS33

350.

V38M51T15X

V38M51T30X

V38M51T45X

2,360.

3,020.

3,675.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

280L

WS33

WS19

WS34

350.

800.

V38M51T75X

V38M51T12X

V38M51T49X

5,200.

7,525.

9,450.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280L



WS34

WS35

800.

1,360.

V38M51T22X

V38M51T33X

V38M51T55X

13,820.

17,500.

28,000.

400 ∆ Volts to 208Y/120 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

66E

Indoor-

Outdoor

—

Y39G28T03X

Y39G28T06X

Y39G28T09X

1,540.

1,860.

2,525.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

66E

84Z

Indoor-

Outdoor

—

Y39G28T15X

Y39M28T30X

Y39M28T45X

3,175.

5,200.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280K

WS31

WS33

350.

V39M28T15X

V39M28T30X

V39M28T45X

2,380.

3,040.

3,700.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

280K

WS33

WS19

WS34

350.

800.

V39M28T75X

V39M28T12X

V39M28T49X

5,230.

7,570.

9,500.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280K



WS34

WS35

800.

1,360.

V39M28T22X

V39M28T33X

V39M28T55X

13,900.

17,600.

28,160.

400 ∆ Volts to 400Y/231 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70U

Indoor-

Outdoor

—

Y39G34T03X

Y39G34T06X

Y39G34T09X

1,740.

2,100.

2,740.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70U

84V

Indoor-

Outdoor

—

Y39G34T15X

Y39M34T30X

Y39M34T45X

3,440.

5,200.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280K

WS31

WS33

350.

V39M34T15X

V39M34T30X

V39M34T45X

2,380.

3,040.

3,700.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

280K

WS33

WS19

WS34

350.

800.

V39M34T75X

V39M34T12X

V39M34T49X

5,230.

7,570.

9,500.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280K



WS34

WS35

800.

1,360.

V39M34T22X

V39M34T33X

V39M34T55X

13,900.

17,600.

28,160.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-23

Transformers

9

General Purpose Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

416 ∆ Volts to 208Y/120 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70V

Indoor-

Outdoor

—

Y43G28T03X

Y43G28T06X

Y43G28T09X

1,600.

1,950.

2,525.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70V

84I

Indoor-

Outdoor

—

Y43G28T15X

Y43M28T30X

Y43M28T45X

3,175.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280P

WS31

WS33

350.

V43M28T15X

V43M28T30X

V43M28T45X

2,260.

2,520.

3,150.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

280P

WS33

WS19

WS34

350.

800.

V43M28T75X

V43M28T12X

V43M28T49X

4,570.

6,230.

8,570.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280P



WS34

WS35

800.

1,360.

V43M28T22X

V43M28T33X

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%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

282J

WS31

WS33

350.

V43M26T15X

V43M26T30X

V43M26T45X

1,960.

2,520.

3,045.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

282J

WS33

WS19

WS34

350.

800.

V43M26T75X

V43M26T12X

V43M26T49X

4,310.

6,235.

7,830.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

282J



WS34

WS35

800.

1,360.

V43M26T22X

V43M26T33X

V43M26T55X

11,450.

14,500.

23,200.

416 ∆ Volts to 220Y/127 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70V

Indoor-

Outdoor

—

Y43G31T03X

Y43G31T06X

Y43G31T09X

1,550.

1,890.

2,340.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70V



Indoor-

Outdoor

—

Y43G31T15X

Y43M31T30X

Y43M31T45X

3,050.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280S

WS31

WS33

350.

V43M31T15X

V43M31T30X

V43M31T45X

2,260.

2,520.

3,150.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V43M31T75X

V43M31T12X

V43M31T49X

4,570.

6,230.

8,570.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280S



WS34

WS35

800.

1,360.

V43M31T22X

V43M31T33X

V43M31T55X

11,450.

18,300.

23,400.

416 ∆ Volts to 240 ∆ Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

74I

Indoor-

Outdoor

—

Y43G24T03X

Y43G24T06X

Y43G24T09X

1,550.

1,890.

2,430.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

74I



Indoor-

Outdoor

—

Y43G24T15X

Y43M24T30X

Y43M24T45X

3,060.

5,820.

7,280.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

281AD

WS31

WS33

350.

V43M24T15X

V43M24T30X

V43M24T45X

1,960.

2,520.

3,045.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

281AD

WS33

WS19

WS34

350.

800.

V43M24T75X

V43M24T12X

V43M24T49X

4,310.

6,235.

7,830.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

281AD



WS34

WS35

800.

1,360.

V43M24T22X

V43M24T33X

V43M24T55X

11,450.

14,500.

23,200.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-24

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose Transformers

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

Refer to your Cutler-Hammer sales ofﬁce.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

416 ∆ Volts to 416Y/240 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

66F

Indoor-

Outdoor

—

Y43G51T03X

Y43G51T06X

Y43G51T09X

1,550.

1,890.

2,340.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

66F

84J

Indoor-

Outdoor

—

Y43G51T15X

Y43M51T30X

Y43M51T45X

3,050.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280S

WS31

WS33

350.

V43M51T15X

V43M51T30X

V43M51T45X

2,110.

2,350.

2,940.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V43M51T75X

V43M51T12X

V43M51T49X

4,260.

5,800.

7,980.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280S

275N

WS34

WS35

800.

1,360.

V43M51T22X

V43M51T33X

V43M51T55X

10,660.

17,040.

21,790.

480 ∆ Volts to 208Y/120 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70A

Indoor-

Outdoor

—

Y48G28T03X

Y48G28T06X

Y48G28T09X

1,340.

1,630.

2,110.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70A

84A

Indoor-

Outdoor

—

Y48G28T15X

Y48M28T30X

Y48M28T45X

2,650.

5,200.

6,500.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M28T15X

V48M28T30X

V48M28T45X

1,720.

2,175.

2,650.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M28T75X

V48M28T12X

V48M28T49X

3,750.

6,170.

6,810.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280B

275A

WS34

WS35

800.

1,360.

V48M28T22X

V48M28T33X

V48M28T55X

9,900.

12,800.

20,160.

480 ∆ Volts to 220Y/127 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70A

Indoor-

Outdoor

—

Y48G31T03X

Y48G31T06X

Y48G31T09X

2,000.

2,440.

3,160.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70A

84K

Indoor-

Outdoor

—

Y48G31T15X

Y48M31T30X

Y48M31T45X

3,970.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M31T15X

V48M31T30X

V48M31T45X

1,960.

2,520.

3,060.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M31T75X

V48M31T12X

V48M31T49X

4,310.

6,230.

7,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280B

275A

WS34

WS35

800.

1,360.

V48M31T22X

V48M31T33X

V48M31T55X

11,375.

14,500.

23,100.

480 ∆ Volts to 380Y/220 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70R

Indoor-

Outdoor

—

Y48G37T03X

Y48G37T06X

Y48G37T09X

2,000.

2,440.

3,160.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70R



Indoor-

Outdoor

—

Y48G37T15X

Y48M37T30X

Y48M37T45X

3,970.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M37T15X

V48M37T30X

V48M37T45X

2,270.

2,520.

3,150.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M37T75X

V48M37T12X

V48M37T49X

4,300.

6,175.

8,570.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

280B

275A

WS34

WS35

800.

1,360.

V48M37T22X

V48M37T33X

V48M37T55X

11,375.

18,300.

23,100.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-25

Transformers

9

General Purpose Transformers

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

Refer to your Cutler-Hammer sales ofﬁce.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm)

Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 400Y/231 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70A

Indoor-

Outdoor

—

Y48G34T03X

Y48G34T06X

Y48G34T09X

2,000.

2,440.

3,160.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70A



Indoor-

Outdoor

—

Y48G34T15X

Y48M34T30X

Y48M34T45X

3,970.

5,800.

7,250.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M34T15X

V48M34T30X

V48M34T45X

2,270.

2,520.

3,150.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M34T75X

V48M34T12X

V48M34T49X

4,300.

6,170.

8,570.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1089

1315

FR918A

FR919

FR920

280B



WS34

WS35

800.

1,360.

V48M34T22X

V48M34T33X

V48M34T55X

11,375.

14,375.

23,050.

480 ∆ Volts to 480Y/277 Volts, 50/60 Hz

3

6

9

—

2@-5%

EPT

115

15-7/8

17-3/8

16-1/2

19-11/16

9-7/8

10-7/16

165

190

275

403

442

419

500

251

265

75

86

125

FR200

FR103

FR95

70L

Indoor-

Outdoor

—

Y48G47T03X

Y48G47T06X

Y48G47T09X

2,000.

2,440.

3,160.

15

30

45

—

2@+2.5%

2@-5%

4@-2.5%

EPT

115

15-15/16

26-5/8

26-1/2

25-3/4

25-1/4

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

70L

84D

Indoor-

Outdoor

—

Y48G47T15X

Y48M47T30X

Y48M47T45X

3,970.

6,550.

8,190.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M47T15X

V48M47T30X

V48M47T45X

2,305.

2,935.

3,575.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M47T75X

V48M47T12X

V48M47T49X

5,050.

7,320.

9,180.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1089

1315

FR918A

FR919

FR920

280B

275A

WS34

WS35

800.

1,360.

V48M47T22X

V48M47T33X

V48M47T55X

13,440.

17,000.

27,200.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-26

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Electrostatically Shielded Transformers

Single- and Three-Phase Types EP, DS-3, EPT, DT-3, 60 Hz Vol. 1, Ref. No. [0326]

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).

Application Description

Electrostatically shielded transformers

are used to protect sensitive electrical

equipment from undesirable high fre-

quency 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.

Typical uses of shielded isolation

transformers include:

■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 seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-27

Transformers

9

Electrostatically Shielded Transformers

Single- and Three-Phase, Types EP, 60 Hz

Vol. 1, Ref. No. [0327]

Sound Levels

All Eaton’s Cutler-Hammer 600 volt

class general purpose dry-type distri-

bution transformers are designed to

meet NEMA ST-20 sound levels listed

here. These are the sound levels mea-

sured in a soundproof environment.

Actual sound levels measured at an

installation will likely be higher due to

electrical connections and environ-

mental 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 9-26. Average Sound Levels

Winding Terminations

Primary and secondary windings are

terminated in the wiring compartment.

Encapsulated units have copper leads or

stabs brought out for connections. Venti-

lated 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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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 9-27. Single-Phase Selection Information — Types EP, 60 Hz

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

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

120 x 240 Volts to 120/240 Volts

3

5

7.5

—

EP

115

14-1/8

16

7-3/4

10-3/8

8

9-7/8

65

113

123

359

406

197

263

203

251

29

51

55

FR176

FR177

FR178

90B

Indoor-

Outdoor

—

S10N11E03N

S10N11E05N

S10N11E07N

1,155.

1,560.

2,010.

10

15

25

—

EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/8

193

216

375

482

568

339

416

266

359

87

98

170

FR179

FR180

FR182

90B

Indoor-

Outdoor

—

S10N11E10N

S10N11E15N

S10N11E25N

2,450.

3,350.

4,800.

120 Volts to 120 Volts

3

5

7.5

—

EP

115

14-1/8

16

7-3/4

10-3/8

8

9-7/8

65

113

123

359

406

197

263

203

251

29

51

55

FR176

FR177

FR178

77A

Indoor-

Outdoor

—

S12N12E03N

S12N12E05N

S12N12E07N

1,155.

1,560.

2,010.

10

15

25

—

EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/8

193

216

375

482

568

339

416

266

359

87

98

170

FR179

FR180

FR182

77A

Indoor-

Outdoor

—

S12N12E10N

S12N12E15N

S12N12E25N

2,450.

3,350.

4,800.

208 Volts to 120/240 Volts

3

5

7.5

—

EP

115

14-1/8

16

7-3/4

10-3/8

8

9-7/8

65

113

123

359

406

197

263

203

251

29

51

55

FR176

FR177

FR178

578A

Indoor-

Outdoor

—

S29N11E03N

S29N11E05N

S29N11E07N

1,320.

1,950.

2,585.

10

15

25

—

EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/8

193

216

375

482

568

339

416

266

359

87

98

170

FR179

FR180

FR182

578A

Indoor-

Outdoor

—

S29N11E10N

S29N11E15N

S29N11E25N

3,100.

3,650.

5,200.

208 Volts to 208 Volts

3

5

7.5

—

EP

115

14-1/8

16

7-3/4

10-3/8

8

9-7/8

65

113

123

359

406

197

263

203

251

29

51

55

FR176

FR177

FR178

77B

Indoor-

Outdoor

—

S29N29E03N

S29N29E05N

S29N29E07N

1,320.

1,950.

2,585.

10

15

25

—

EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/8

193

216

375

482

568

339

416

266

359

87

98

170

FR179

FR180

FR182

77B

Indoor-

Outdoor

—

S29N29E10N

S29N29E15N

S29N29E25N

3,100.

3,350.

5,200.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-28

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Electrostatically Shielded Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

240 Volts to 240 Volts

3

5

7.5

—

EP

115

14-1/8

16

7-3/4

10-3/8

8

9-7/8

65

113

123

359

406

197

263

203

251

29

51

55

FR176

FR177

FR178

77C

Indoor-

Outdoor

—

S24N24E03N

S24N24E05N

S24N24E07N

1,155.

1,560.

2,010.

10

15

25

—

EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/8

193

216

375

482

568

339

416

266

359

87

98

170

FR179

FR180

FR182

77C

Indoor-

Outdoor

—

S24N24E10N

S24N24E15N

S24N24E25N

2,450.

3,350.

4,800.

277 Volts to 120/240 Volts

3

5

7.5

—

EP

115

14-1/8

16

7-3/4

10-3/8

8

9-7/8

65

113

123

359

406

197

263

203

251

29

51

55

FR176

FR177

FR178

513B

Indoor-

Outdoor

—

S27N11E03N

S27N11E05N

S27N11E07N

1,320.

1,950.

2,585.

10

15

25

—

EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/8

193

216

375

482

568

339

416

266

359

87

98

170

FR179

FR180

FR182

513B

Indoor-

Outdoor

—

S27N11E10N

S27N11E15N

S27N11E25N

3,100.

3,650.

5,200.

240 x 480 Volts to 120/240 Volts

.25

.50

.75

—

EP

115

6-1/2

8-3/8

4-7/8

6

3-7/8

4-5/8

5-3/4

12

13

21

165

213

124

152

98

117

146

5

6

10

FR56

FR57

FR58A

90A

Indoor-

Outdoor

—

S20N11E26A

S20N11E51A

S20N11E76A

150.

190.

245.

1

1.5

2

—

EP

115

8-3/8

10-3/4

6

6-3/16

5-3/4

6-1/8

31

40

213

273

152

157

146

156

14

18

FR59A

FR67

FR68

90A

Indoor-

Outdoor

—

S20N11E01A

S20N11E16A

S20N11E02A

290.

355.

450.

3

5

7.5

—

EP

115

14-1/8

16

7-11/16

10-3/8

8

9-7/8

65

113

123

359

406

195

263

203

251

29

51

55

FR176

FR177

FR178

90A

Indoor-

Outdoor

—

S20N11E03A

S20N11E05A

S20N11E07A

550.

815.

1,080.

10

15

25

—



—



EP

115

19

22-3/8

13-3/8

16-3/8

10-1/2

14-1/8

193

216

375

482

568

339

416

266

359

87

98

170

FR179

FR180

FR182

90A

526A

Indoor-

Outdoor

—

S20N11E10A

S20N11E15A

S20L11E25A

1,300.

1,750.

2,475.

15

25

37.5



DS-3

150

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

147

212

306

768

793

953

428

574

402

445

495

67

96

139

FR815

FR816

FR817

261A

WS15

WS11

350.

T20P11E15

T20P11E25

T20P11E37

1,600.

2,075.

2,540.

50

75

100



DS-3

150

37-5/8

42-1/8

22-5/8

24

19-1/2

23-3/8

340

510

600

953

1070

574

610

495

594

154

233

274

FR818

FR819

FR820

261A

WS11

WS16

350.

800.

T20P11E50

T20P11E75

T20P11E99

3,080.

4,350.

5,400.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-29

Transformers

9

Electrostatically Shielded Transformers

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

Refer to your Cutler-Hammer sales ofﬁce.

Not seismic qualiﬁed.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

208 ∆ Volts to 208Y/120 Volts

15

30

2@+2.5%

2@-2.5%

4@-2.5%

EPT

DT-3

115

150

17-3/8

25

30-1/8

19-3/4

20-1/8

10-1/2

14-1/8

275

152

230

441

635

765

502

511

266

359

124

69

104

FR95

FR909

FR910A

86A

283A

Indoor-

Outdoor

WS31

—

350.

Y29D28E15B

—

V29M28E15A

V29M28E30B

2,950.

—

2,080.

2,660.

45

75

112.5

2@+2.5%

1@+5%

4@-2.5%

2@-5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

600

765

1000

511

663

359

485

140

217

272

FR912A

FR914B

FR915B

283A

287A

WS31

WS33

350.

V29M28E45B

V29M28E75B

V29R28E12B

3,235.

4,575.

6,620.

150

225

300

1@+5%

2@-5%

DT-3

150

46-1/8

62-1/4

28

31-1/4

23

30-1/4

760

1600

1171

1581

712

794

585

768

344

728

FR916A

FR918A

287A

WS19

WS34

350.

800.

V29R28E49B

V29R28E22B

V29R28E33B

8,300.

12,100.

15,400.

480 ∆ Volts to 208Y/120 Volts

3

6

9

15

2@+2.5%

2@-2.5%

EPT

115

13-3/8

15-7/8

17-3/8

15-5/16

16-1/2

19-3/4

8-5/16

9-7/8

10-1/2

116

143

166

275

339

403

441

404

419

211

251

52

64

75

FR201

FR200

FR103

FR95

86B

Indoor-

Outdoor

—

Y48D28E03A

Y48D28E06A

Y48D28E09N

Y48D28E15B

1,165.

1,420.

1,840.

2,310.

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

239

310

635

765

511

359

69

108

140

FR909

FR910A

FR912A

283B

WS31

350.

V48M28E15B

V48M28E30B

V48M28E45B

1,485.

1,900.

2,310.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

283B

WS33

WS19

350.

V48M28E75B

V48M28E12B

V48M28E49B

3,270.

4,945.

6,200.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

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

728

1088

FR917

FR918A

FR919

283B

292A

WS34

WS35

800.

1,360.

V48M28E22B

V48M28E33B

V48M28E55G

9,000.

11,500.

18,400.

750

1000

2@+2.5%

1@+3.5%

4@-2.5%

1@-3.5%

DT-3

150

75

68

44-1/2

64

36

45

2900

4350

1905

1727

1130

1625

914

1143

1315

1912

FR920 292A



WS35



1,360.

—

V48M28E77B

V48W28E11A 

28,600.

51,200.

480 ∆ Volts to 208Y/120 Volts — Copper Windings

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

172

300

370

635

765

511

359

78

136

168

FR909

FR910A

FR912A

283B

WS31

350.

V48M28E15CU

V48M28E30CU

V48M28E45CU

2,300.

2,520.

3,180.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

550

675

850

1000

1171

663

712

485

585

250

307

386

FR914B

FR915B

FR916A

283B

WS33

WS19

350.

V48M28E75CU

V48M28E12CU

V48M28E49CU

4,830.

6,600.

9,020.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

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

977

1088

FR917

FR918A

FR919

283B

292A

WS34

WS35

800.

1,360.

V48M28E22CU

V48M28E33CU

V48M28E55CU

12,150.

15,200.

24,590.

480 ∆ Volts to 480Y/277 Volts

9

15

2@+2.5%

2@-2.5%

EPT

115

15-7/8

17-3/8

16-1/2

19-3/4

9-7/8

10-1/2

166

275

403

441

419

251

266

75

FR103

FR95

86C

Indoor-

Outdoor

—

Y48D47E09N

Y48D47E15B

2,380.

3,000.

30

45

75

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

359

485

104

140

217

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

V48M47E30B

V48M47E45B

V48M47E75B

2,560.

3,120.

4,410.

112.5

150

225

2@+2.5%

4@-2.5%

DT-3

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

WS33

WS19

WS34

350.

800.

V48M47E12B

V48M47E49B

V48M47E22B

6,390.

8,000.

11,730.

300

500

750

2@+2.5%

4@-2.5%

DT-3

150

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

2900

1581

1905

794

1130

768

914

728

1088

1315

FR918A

FR919

FR920

283B

292A

WS34

WS35

800.

1,360.

V48M47E33B

V48M47E55G

V48M47E77A

14,850.

23,750.

38,600.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-30

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Electrostatically Shielded Transformers

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

Center Tap capacity limited to 5% of rated kVA.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 240 ∆ Volts

3

6

9

15

—

2@-5%

4@-2.5%

EPT

115

13-3/8

15-7/8

17-3/8

16

16-1/2

19-3/4

8-3/8

9-7/8

10-1/2

116

143

166

275

339

403

441

404

419

502

211

251

266

52

64

75

FR201

FR200

FR103

FR95

88A

505B

Indoor-

Outdoor

—

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%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

310

635

765

511

359

69

104

140

FR909

FR910A

FR912A

284B

WS31

350.

V48M22E15B

V48M22E30A

V48M22E45A

1,700.

2,200.

2,750.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

284B

WS33

WS19

350.

V48M22E75A

V48M22E12A

V48M22E49A

3,760.

5,390.

6,830.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

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

728

1088

FR917

FR918A

FR919

284B

293A

WS34

WS35

800.

1,360.

V48M22E22A

V48M22E33A

V48M22E55A

10,000.

12,650.

20,150.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-31

Transformers

9

Energy Efﬁcient Transformers

Single- and Three-Phase, Types EP, DS-3, EPT, DT-3, 60 Hz

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).

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 volt-

age dry-type distribution transformers,

over a 24 hour period, is approxi-

mately 35%. NEMA TP-1 compliant

transformers are optimized to offer

maximum efﬁciency at 35% of name-

plate rating. In applications where the

Eaton’s Cutler-Hammer low tempera-

ture rise (115ºC or 80ºC) product offers

signiﬁcant energy savings.

The range of products covered by

NEMA TP-1-1996 are:

Table 9-31. NEMA TP-1-1996 Product Range

Transformers that are currently speciﬁ-

cally 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 transform-

ers 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

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.

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

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.

Tables of Energy Efﬁciency

NEMA Class 1 Efﬁciency Levels

dry-type Distribution Transformers —

Low Voltage

Single-Phase Three-Phase

kVA Efﬁciency kVA Efﬁciency

15

25

37.5

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

—

225

300

500

750

1000

98.5

98.6

98.7

98.8

98.9



November 2003

9-32

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Energy Efﬁcient Transformers

Single- and Three-Phase, Types EP, DS-3, EPT, DT-3, 60 Hz Vol. 1, Ref. No. [0332]

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 seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature rise with nameplate loading.

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-33. 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.

Enclosures

Cutler-Hammer ventilated transform-

ers, 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 trans-

formers, 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 installa-

tion will likely be higher due to electri-

cal 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 9-34. Average Sound Levels

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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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.



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-33

Transformers

9

NEMA TP-1 Energy Efﬁcient Transformers

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, Labeled

+1 – 5%, -2 – 5% at 240 volts primary; +2 – 2.5%, -4 – 2.5% at 480 volts primary.

480 volt primary only.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

240 x 480 Volts to 120/240 Volts, Aluminum Windings

15

25

37.5

50



DS-3

150

31-1/4

37-5/8

42-1/8

22-5/8

24

17-1/2

19-1/2

23-3/8

212

306

510

768

956

1070

428

574

610

402

495

594

67

139

232

816

817

819

3XA

WS11

WS16

350.

800.

T20P11S15EE

T20P11S25EE

T20P11S37EE

T20P11S50EE

1,810.

2,420.

2,860.

3,500.

75

100

167



2@+2.5%



4@-2.5%

DS-3

150

42-1/8

62-1/2

24

30

23-3/8

34

510

1200

1070

1597

610

762

594

863

232

545

819

814

3XA

288A

WS16

WS13

800.

T20P11S75EE

T20P11S99EE

T48M11S67EE 

4,910.

6,020.

13,300.

15

25

37.5



DS-3

115

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

340

768

956

428

574

402

495

67

154

816

818

3XA

WS11

350.

T20P11F15EE

T20P11F25EE

T20P11F37EE

2,120.

2,820.

3,380.

50

75

100



DS-3

115

42-1/8

62-1/2

24

30

23-3/8

34

510

1200

1070

1597

610

762

594

863

232

545

819

814

3XA

288A

WS16

WS13

800.

T20P11F50EE

T20P11F75EE

T20P11F99EE

4,100.

5,790.

7,080.

15

25

37.5



DS-3

80

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

306

340

768

956

428

574

402

495

67

139

154

816

817

818

3XA

WS11

350.

T20P11B15EE

T20P11B25EE

T20P11B37EE

2,540.

3,400.

4,010.

50

75

100



DS-3

80

42-1/8

62-1/2

24

30

23-3/8

34

510

600

1200

1070

1597

610

762

594

863

232

272

545

819

820

814

3XA

288A

WS16

WS13

800.

T20P11B50EE

T20P11B75EE

T20P11B99EE

4,900.

6,900.

9,220.

240 x 480 Volts to 120/240 Volts, Copper Windings

15

25

37.5

50



DS-3

150

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

237

345

381

768

956

428

574

402

495

108

158

173

816

817

818

3XA

WS11

350.

T20P11S15CUEE

T20P11S25CUEE

T20P11S37CUEE

T20P11S50CUEE

2,450.

3,280.

3,890.

4,750.

75

100

167



2@+2.5%



4@-2.5%

DS-3

150

42-1/8

62-1/2

24

30

23-3/8

34

614

1440

1070

1597

610

762

594

863

279

655

819

814

3XA

288A

WS16

WS13

800.

T20P11S75CUEE

T20P11S99CUEE

T48M11S67CUEE 

6,660.

8,220.

16,625.

15

25

37.5



DS-3

115

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

237

345

381

768

956

428

574

402

495

108

158

173

816

817

818

3XA

WS11

350.

T20P11F15CUEE

T20P11F25CUEE

T20P11F37CUEE

2,810.

3,760.

4,440.

50

75

100



DS-3

115

42-1/8

62-1/2

24

30

23-3/8

34

614

1440

1070

1597

610

762

594

863

279

655

819

814

3XA

288A

WS16

WS13

800.

T20P11F50CUEE

T20P11F75CUEE

T20P11F99CUEE

5,430.

7,620.

9,350.

15

25

37.5



DS-3

80

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

237

345

381

768

956

428

574

402

495

108

158

173

816

817

818

3XA

WS11

350.

T20P11B15CUEE

T20P11B25CUEE

T20P11B37CUEE

3,260.

4,360.

5,150.

50

75

100



2@+2.5%



4@-2.5%

DS-3

80

42-1/8

62-1/2

24

30

23-3/8

34

614

700

1440

1070

1597

610

762

594

863

279

318

655

819

820

814

3XA

288A

WS16

WS13

800.

T20P11B50CUEE

T20P11B75CUEE

T48M11B99CUEE 

6,300.

8,850.

11,610.

208 Volts to 120/240 Volts, Aluminum Windings

15

25

37.5

50

2@+2.5%

4@-2.5%

DS-3

150

31-1/4

37-5/8

42-1/8

22-5/8

24

17-1/2

19-1/2

23-3/8

212

306

510

768

956

1070

428

574

610

402

495

594

67

139

232

816

817

819

260A

WS11

WS16

350.

800.

T29M11S15EE

T29M11S25EE

T29M11S37EE

T29M11S50EE

3,015.

5,275.

6,460.

7,840.

75

100

1@+5%

2@+2.5%

2@-5%

4@-2.5%

DS-3

150

42-1/8

62-1/2

24

30

23-3/8

34

510

1200

1070

1597

610

762

594

863

232

545

819

814

551A

260A

WS16

WS13

800.

T29R11S75EE

T29M11S99EE

11,085.

13,770.

277 Volts to 120/240 Volts, Aluminum Windings

15

25

37.5

50

2@+2.5%

4@-2.5%

DS-3

150

31-1/4

37-5/8

42-1/8

22-5/8

24

17-1/2

19-1/2

23-3/8

212

306

510

768

956

1070

428

574

610

402

495

594

67

139

232

816

817

819

262C

WS11

WS16

350.

800.

T27M11S15EE

T27M11S25EE

T27M11S37EE

T27M11S50EE

3,015.

5,275.

6,460.

7,840.

75

100

2@+2.5%

4@-2.5%

DS-3

150

42-1/8

62-1/2

24

30

23-3/8

34

510

1200

1070

1597

610

762

594

863

232

545

819

814

262C

WS16

WS13

800.

T27M11S75EE

T27M11S99EE

11,085.

13,770.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-34

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

NEMA TP-1 Energy Efﬁcient Transformers

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, Labeled

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480  Volts to 208Y/120 Volts, Aluminum Windings

15

30

45

1@+2.5%

2@+2.5%

3@-2.5%

4@-2.5%

DT-3

150

25

30

20-1/8

14-1/8

152

310

635

762

511

359

69

140

909

912A

375A

280B

WS31

350.

V48U28T15EE

V48M28T30EE

V48M28T45EE

1,830.

2,330.

2,840.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-1/4

46-5/8

26-1/8

28

19-1/8

23

480

600

785

995

1183

663

710

486

584

217

272

357

914B

915B

916A

280B

WS33

WS19

350.

V48M28T75EE

V48M28T12EE

V48M28T49EE

4,025.

5,850.

7,300.

225

300

500

750

2@+2.5%

4@-2.5%

DT-3

150

56-1/4

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

35-3/4

1100

1444

2400

2900

1427

1579

1905

793

1129

616

768

908

499

656

1088

1315

917

918A

919

920

280B

275A

WS34

WS35

800.

1,360.

V48M28T22EE

V48M28T33EE

V48M28T55EE

V48M28T77EE

10,680.

13,500.

21,800.

36,800.

15

30

45

1@+2.5%

2@+2.5%

3@-2.5%

4@-2.5%

DT-3

115

25

30

39-1/4

20-1/8

26-1/8

14-1/8

19-1/8

152

310

480

635

762

995

511

663

359

486

69

140

217

909

912A

914B

375A

280B

WS31

WS33

350.

V48U28F15EE

V48M28F30EE

V48M28F45EE

2,380.

2,840.

3,475.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

39-1/4

46-5/8

26-1/8

28

19-1/8

23

600

785

995

1183

663

710

486

584

272

357

915B

916A

280B

WS33

WS19

350.

V48M28F75EE

V48M28F12EE

V48M28F49EE

5,290.

7,215.

9,850.

225

300

500

750

2@+2.5%

4@-2.5%

DT-3

115

56-1/4

75

31-1/4

44-1/2

24-1/4

35-3/4

1100

2400

2900

1427

1905

793

1129

616

908

499

1088

1315

917

919

920

280B

275A

WS34

WS35

800.

1,360.

V48M28F22EE

V48M28F33EE

V48M28F55EE

V48M28F77EE

13,150.

16,490.

25,070.

40,365.

15

30

45

2@+2.5%

4@-2.5%

DT-3

80

30

39-1/4

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

762

995

511

663

359

486

104

140

217

910A

912A

914B

280B

WS31

WS33

350.

V48M28B15EE

V48M28B30EE

V48M28B45EE

2,800.

3,250.

4,085.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

785

1100

995

1183

1427

663

710

793

486

584

616

272

357

499

915B

916A

917

280B

WS33

WS19

WS34

350.

800.

V48M28B75EE

V48M28B12EE

V48M28B49EE

6,190.

8,450.

11,550.

225

300

500

2@+2.5%

4@-2.5%

DT-3

80

62-1/4

75

31-1/4

44-1/2

30-1/4

35-3/4

1444

2400

2900

1579

1905

793

1129

768

908

656

1088

1315

918A

919

920

280B

275A

WS34

WS35

800.

1,360.

V48M28B22EE

V48M28B33EE

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%

2@+2.5%

3@-2.5%

4@-2.5%

DT-3

150

25

30

39-1/4

20-1/8

26-1/8

14-1/8

19-1/8

152

310

480

635

762

995

511

663

359

486

69

140

217

909

912A

914B



282B

WS31

WS33

350.

V48U22T15EE

V48M22T30EE

V48M22T45EE

2,095.

2,800.

3,500.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-1/4

46-5/8

26-1/8

28

19-1/8

23

600

785

995

1183

663

710

486

584

272

357

915B

916A

282B

WS33

WS19

350.

V48M22T75EE

V48M22T12EE

V48M22T49EE

4,830.

7,020.

8,760.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56-1/4

75

31-1/4

44-1/2

24-1/4

35-3/4

1100

2400

2900

1427

1905

793

1129

616

908

499

1088

1315

917

919

920

282B

291A

WS34

WS35

800.

1,360.

V48M22T22EE

V48M22T33EE

V48M22T55EE

12,850.

16,300.

26,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-35

Transformers

9

NEMA TP-1 Energy Efﬁcient Transformers

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, Labeled

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480  Volts to 208Y/120 Volts, Copper Windings

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30

20-1/8

14-1/8

172

370

635

762

511

359

78

168

909

912A

280B

WS31

350.

V48M28T15CUEE

V48M28T30CUEE

V48M28T45CUEE

2,800.

3,170.

3,870.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-1/4

46-5/8

26-1/8

28

19-1/8

23

675

870

995

1183

663

710

486

584

307

391

915B

916A

280B

WS33

WS19

350.

V48M28T75CUEE

V48M28T12CUEE

V48M28T49CUEE

5,470.

7,960.

9,940.

225

300

500

750

2@+2.5%

4@-2.5%

DT-3

150

56-1/4

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

35-3/4

1200

1894

3100

3600

1427

1579

1905

793

1129

616

768

908

545

861

1409

1636

917

918A

919

920

280B

275A

WS34

WS35

800.

1,360.

V48M28T22CUEE

V48M28T33CUEE

V48M28T55CUEE

V48M28T77CUEE

15,500.

18,500.

29,800.

47,390.

15

30

45

2@+2.5%

2@-2.5%

4@-2.5%

DT-3

115

25

30

39-1/4

20-1/8

26-1/8

14-1/8

19-1/8

172

370

550

635

762

995

511

663

359

486

78

168

250

909

912A

914B

266W

280B

WS31

WS33

350.

V48D28F15CUEE

V48M28F30CUEE

V48M28F45CUEE

3,210.

3,825.

4,690.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

39-1/4

46-5/8

26-1/8

28

19-1/8

23

675

870

995

1183

663

710

486

584

307

391

915B

916A

280B

WS33

WS19

350.

V48M28F75CUEE

V48M28F12CUEE

V48M28F49CUEE

7,140.

9,740.

13,300.

225

300

500

750

2@+2.5%

4@-2.5%

DT-3

115

56-1/4

75

31-1/4

44-1/2

24-1/4

35-3/4

1200

3100

3600

1427

1905

793

1129

616

908

545

1409

1636

917

919

920

280B

275A

WS34

WS35

800.

1,360.

V48M28F22CUEE

V48M28F33CUEE

V48M28F55CUEE

V48M28F77CUEE

17,750.

22,250.

33,790.

52,000.

15

30

45

2@+2.5%

4@-2.5%

DT-3

80

30

39-1/4

20-1/8

26-1/8

14-1/8

19-1/8

300

370

675

762

995

511

663

359

486

136

168

307

910A

912A

915B

280B

WS31

WS33

350.

V48M28B15CUEE

V48M28B30CUEE

V48M28B45CUEE

3,780.

4,130.

5,510.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

870

1200

995

1183

1427

663

710

793

486

584

616

307

391

545

915B

916A

917

280B

WS33

WS19

WS34

350.

800.

V48M28B75CUEE

V48M28B12CUEE

V48M28B49CUEE

8,350.

11,400.

15,600.

225

300

500

2@+2.5%

4@-2.5%

DT-3

80

62-1/4

75

31-1/4

44-1/2

30-1/4

35-3/4

1894

3100

3600

1579

1905

793

1129

768

908

861

1409

1636

918A

919

920

280B

275A

WS34

WS35

800.

1,360.

V48M28B22CUEE

V48M28B33CUEE

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%

2@+2.5%

3@-2.5%

4@-2.5%

DT-3

150

25

30

39-1/4

20-1/8

26-1/8

14-1/8

19-1/8

172

370

550

635

762

995

511

663

359

486

78

168

250

909

912A

914B



282B

WS31

WS33

350.

V48U22T15CUEE

V48M22T30CUEE

V48M22T45CUEE

2,830.

3,790.

4,730.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-1/4

46-5/8

26-1/8

28

19-1/8

23

675

870

995

1183

663

710

486

584

307

391

915B

916A

282B

WS33

WS19

350.

V48M22T75CUEE

V48M22T12CUEE

V48M22T49CUEE

6,470.

9,480.

11,850.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56-1/4

75

31-1/4

44-1/2

24-1/4

35-3/4

1200

3100

3600

1427

1905

793

1129

616

908

545

1409

1636

917

919

920

282B

291A

WS34

WS35

800.

1,360.

V48M22T22CUEE

V48M22T33CUEE

V48M22T55CUEE

17,380.

21,900.

35,800.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-36

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Low Temperature Rise Energy Efﬁcient Transformers

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

+1 – 5%, -2 – 5% at 240 volts primary; +2 – 2.5%, -4 – 2.5% at 480 volts primary.

480 volt primary only.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

240 x 480 Volts to 120/240 Volts

15

25

37.5



DS-3

80

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

147

212

306

768

793

953

428

574

402

445

495

67

96

139

FR816

FR817

FR818

3XA

WS11

350.

T20P11B15

T20P11B25

T20P11B37

1,980.

2,560.

3,125.

50

75

100



2@+2.5%



4@-2.5%

DS-3

80

37-5/8

42-1/8

62-1/8

22-5/8

24

30

19-1/2

23-3/8

34

340

510

1150

953

1070

1597

574

610

762

495

594

863

154

233

612

FR819

FR820

FR814

3XA

288A

WS16

WS13

800.

T20P11B50

T20P11B75

T48M11B99A 

3,790.

5,350.

8,900.

15

25

37.5



DS-3

115

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

147

212

306

768

793

953

428

574

402

445

495

67

96

139

FR815

FR816

FR817

3XA

WS15

WS11

350.

T20P11F15

T20P11F25

T20P11F37

1,680.

2,200.

2,660.

50

75

100



DS-3

115

37-5/8

42-1/8

22-5/8

24

19-1/2

23-3/8

340

510

600

953

1070

574

610

495

594

154

233

274

FR818

FR819

FR820

3XA

WS11

WS16

350.

800.

T20P11F50

T20P11F75

T20P11F99

3,170.

4,520.

5,630.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-37

Transformers

9

Low Temperature Rise Energy Efﬁcient Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 208Y/120 Volts

15

30

45

75

2@+2.5%

4@-2.5%

DT-3

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

600

765

1000

511

663

359

486

104

140

217

272

FR910A

FR912A

FR914B

FR915B

280B

WS31

WS33

350.

V48M28B15A

V48M28B30R

V48M28B45R

V48M28B75R

1,830.

2,350.

2,860.

4,040.

112.5

150

225

300

2@+2.5%

4@-2.5%

DT-3

80

46-1/8

56

62-1/4

75

28

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

WS19

WS34

WS35

350.

800.

1,360.

V48M28B12R

V48M28B49P

V48M28B22P

V48M28B33R

5,850.

7,350.

10,670.

13,700.

500

750

1000

2@+2.5%

—

1@+4.2%

4@-2.5%

—

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 

22,000.

35,100.

65,100.

15

30

45

75

2@+2.5%

4@-2.5%

DT-3

115

25

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

152

230

310

480

635

765

1000

511

663

359

486

69

104

140

217

FR909

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M28F15B

V48M28F30R

V48M28F45R

V48M28F75R

1,570.

2,000.

2,440.

3,450.

112.5

150

225

300

2@+2.5%

4@-2.5%

DT-3

115

39-3/8

46-1/8

56

62-1/4

26-1/8

28

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

WS19

WS33

WS34

350.

800.

V48M28F12R

V48M28F49P

V48M28F22P

V48M28F33P

4,950.

6,250.

9,100.

11,750.

500

750

1000

2@+2.5%

1@+3.5%

1@+4.2%

4@-2.5%

1@-3.5%

1@-4.2%

DT-3

115

75



44-1/2



36



2400



1905



1130



914



1088



FR919



275A



WS35



1,360.

—

V48M28F55P

V48W28F77T

V48T28F11R 

18,750.

31,200.

55,550.

480 ∆ Volts to 208Y/120 Volts, Copper Windings

9

15

30

45

2@+2.5%

2@-2.5%

4@-2.5%

EPT

DT-3

80

17-3/8

30-1/8

39-3/8

19-11/16

20-1/8

26-1/8

10-7/16

14-1/8

19-1/8

300

370

550

441

765

1000

499

511

663

265

359

486

136

168

250

FR95

FR910A

FR912A

FR914B

72B

280B

Indoor-

Outdoor

WS31

WS33

—

350.

Y48D28B09CU

—

V48M28B15CU

V48M28B30CU

V48M28B45CU

3,000.

—

2,700.

3,100.

3,940.

75

112.5

150

225

2@+2.5%

4@-2.5%

DT-3

80

39-3/8

46-1/8

56

62-1/4

26-1/8

28

31-1/4

19-1/8

20-3/16

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

WS33

WS19

WS34

350.

800.

V48M28B75CU

V48M28B12CU

V48M28B49CU

V48M28B22CU

5,970.

8,160.

11,150.

14,900.

300

500

750

2@+2.5%

2@+3.1%

1@+3.5%

4@-2.5%

2@-3.1%

1@-3.5%

DT-3

80

75



44-1/2



36



3100



1905



1130



914



1409



FR919



280B



WS35



1,360.

—

V48M28B33CU

V48M28B55CU

V48W28B77CU

18,660.

33,700.

44,500.

15

30

45

75

2@+2.5%

4@-2.5%

DT-3

115

25

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

172

300

370

550

635

765

1000

511

663

359

486

78

136

168

250

FR909

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M28F15CU

V48M28F30CU

V48M28F45CU

V48M28F75CU

2,300.

2,740.

3,350.

5,100.

112.5

150

225

2@+2.5%

4@-2.5%

DT-3

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

486

585

616

307

386

545

FR915B

FR916A

FR917

280B

WS19

WS33

WS34

350.

800.

V48M28F12CU

V48M28F49CU

V48M28F22CU

6,960.

9,510.

12,690.

300

500

750

2@+2.5%

1@+3.5%

4@-2.5%

1@-3.5%

DT-3

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



280B

275A



WS34

WS35



800.

1,360.

—

V48M28F33CU

V48M28F55CU

V48W28F77CU

16,000.

25,950.

39,500.

480 ∆ Volts to 240 ∆ Volts

30

45

75

2@+2.5%

4@-2.5%

DT-3

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

600

765

1000

511

663

359

486

140

217

272

FR912A

FR914B

FR915B

281B

WS31

WS33

350.

V48M24B30R

V48M24B45P

V48M24B75P

2,700.

3,400.

4,630.

112.5

150

225

2@+2.5%

4@-2.5%

DT-3

80

46-1/8

56

62-1/4

28

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

281B

WS19

WS34

350.

800.

V48M24B12P

V48M24B49P

V48M24B22P

6,660.

9,250.

12,300.

300

500

2@+2.5%

2@+3.1%

4@-2.5%

2@-3.1%

DT-3

80

75



44-1/2



36



2400



1905



1130



914



1088



FR919



281B



WS35



1,360.

—

V48M24B33P

V48X24B55N

15,525.

26,400.

30

45

75

2@+2.5%

4@-2.5%

DT-3

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

359

486

104

140

217

FR910A

FR912A

FR914B

281B

WS31

WS33

350.

V48M24F30P

V48M24F45P

V48M24F75P

2,300.

2,900.

3,950.

112.5

150

225

2@+2.5%

4@-2.5%

DT-3

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

486

585

616

272

344

499

FR915B

FR916A

FR917

281B

WS19

WS33

WS34

350.

800.

V48M24F12P

V48M24F49P

V48M24F22P

5,640.

7,140.

10,470.

300

500

750

2@+2.5%

1@+3.5%

4@-2.5%

1@-3.5%

DT-3

115

62-1/4

75



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.

1,360.

—

V48M24F33P

V48M24F55N

V48W24F77N

13,225.

21,050.

37,450.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-38

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Energy Efﬁcient Harmonic Mitigating Transformers

Three-Phase, Type DT-3 HMT, 60 Hz Vol. 1, Ref. No. [0338]

Energy Efﬁcient Harmonic

Mitigating Transformers

Product Description

Three-Phase, Type DT-3 HMT, 60 Hz

■Harmonic mitigating (cancellation)

transformers are a cost-effective

means of treating harmful harmonics

in an electrical distribution system.

■Reducing harmonic content in elec-

trical 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 electro-

magnetic 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 miti-

gating 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 trans-

formers, or combination of transform-

ers, 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 trans-

formers are ideally suited for applica-

tions where the nonlinear loads are

single-phase. Such devices as com-

puters, lighting ballasts, ofﬁce equip-

ment, diagnostic equipment, cash

registers, and other electronic equip-

ment are all common single-phase

loads that generate harmonic currents.

Single-phase loads, such as those pre-

viously mentioned, generate harmonic

proﬁles that are rich in 3rd and other

triplen (9th, 15th, 21st, …) harmonic

currents. Type NON harmonic mitigat-

ing transformers treat triplen harmon-

ics in the secondary windings such

that these harmonics are not coupled

into the primary delta.

In addition to treating triplen harmon-

ics, Types POS and NEG harmonic mit-

igating 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 tri-

plen 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 atten-

uation of common mode and trans-

verse 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 per-

formance and energy efﬁciency.

■Meets NEMA ST-20 sound standards.

Standards and Certiﬁcations

Industry Standards

All Cutler-Hammer dry-type transform-

ers 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 seismi-

cally qualiﬁed, and exceed the require-

ments 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 venti-

lated transformers. Please refer to

Page 9-120.



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-39

Transformers

9

Energy Efﬁcient Harmonic Mitigating Transformers

Three-Phase, Type DT-3 HMT, 60 Hz

Vol. 1, Ref. No. [0339]

Product Speciﬁcations

Frequency

Cutler-Hammer standard dry-type dis-

tribution transformers are designed

for 60 Hz operation. Transformers

required for other frequencies are

available and must be speciﬁcally

designed.

Overload Capacity

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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature rise with nameplate loading.

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-39. Insulation System Classiﬁcation

The design life of transformers having

different insulation systems is the

same — the lower temperature sys-

tems are designed for the same life as

the higher temperature systems.

Enclosures

Cutler-Hammer ventilated transform-

ers, 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 trans-

formers, Types EP and EPT, utilize a

NEMA 3R rated enclosure as standard.

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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.

Table 9-40. Average Sound Levels

Table 9-41. Type NON Harmonic Mitigating Transformer Selection Information

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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

kVA Full Cap. Taps Type °C

Temp .

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

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%

DT-3

150

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28T15CUEENON

X48M28T30CUEENON

X48M28T45CUEENON

6,070.

7,430.

9,100.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28T75CUEENON

X48M28T12CUEENON

X48M28T49CUEENON

11,710.

15,450.

21,400.

225

300

2@+2.5%

4@-2.5%

2@-2.5%

DT-3

150

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28T22CUEENON

X48M28T33CUEENON

26,250.

36,300.

15

30

45

2@+2.5%

4@-2.5%

DT-3

115

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28F15CUEENON

X48M28F30CUEENON

X48M28F45CUEENON

6,620.

8,110.

9,930.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28F75CUEENON

X48M28F12CUEENON

X48M28F49CUEENON

12,770.

16,850.

23,330.

225

300

2@+2.5%

4@-2.5%

DT-3

115

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28F22CUEENON

X48M28F33CUEENON

28,700.

39,500.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-40

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Energy Efﬁcient Harmonic Mitigating Transformers

Three-Phase, Type DT-3 HMT, 60 Hz Vol. 1, Ref. No. [0340]

Table 9-42. Type POS Harmonic Mitigating Transformer Selection Information

Table 9-43. Type NEG Harmonic Mitigating Transformer Selection Information

kVA Full Cap. Taps Type °C

Temp .

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

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%

DT-3

150

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28T15CUEEPOS

X48M28T30CUEEPOS

X48M28T45CUEEPOS

8,060.

9,085.

12,030.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28T75CUEEPOS

X48M28T12CUEEPOS

X48M28T49CUEEPOS

14,890.

20,160.

28,500.

225

300

2@+2.5%

4@-2.5%

DT-3

150

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28T22CUEEPOS

X48M28T33CUEEPOS

33,300.

37,900.

15

30

45

2@+2.5%

4@-2.5%

DT-3

115

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28F15CUEEPOS

X48M28F30CUEEPOS

X48M28F45CUEEPOS

8,770.

9,900.

13,100.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28F75CUEEPOS

X48M28F12CUEEPOS

X48M28F49CUEEPOS

16,200.

21,900.

31,000.

225

300

2@+2.5%

4@-2.5%

DT-3

115

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28F22CUEEPOS

X48M28F33CUEEPOS

34,900.

39,900.

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%

DT-3

115

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28F15TCUEEPOS

X48M28F30TCUEEPOS

X48M28F45TCUEEPOS

8,790.

9,920.

13,120.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28F75TCUEEPOS

X48M28F12TCUEEPOS

X48M28F49TCUEEPOS

16,250.

22,000.

31,100.

225

300

2@+2.5%

4@-2.5%

DT-3

115

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28F22TCUEEPOS

X48M28F33TCUEEPOS

35,000.

43,000.

kVA Full Cap. Taps Type °C

Temp .

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

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%

DT-3

150

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28T15CUEENEG

X48M28T30CUEENEG

X48M28T45CUEENEG

8,060.

9,085.

12,030.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28T75CUEENEG

X48M28T12CUEENEG

X48M28T49CUEENEG

14,890.

20,160.

28,500.

225

300

2@+2.5%

4@-2.5%

DT-3

150

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28T22CUEENEG

X48M28T33CUEENEG

33,300.

37,900.

15

30

45

2@+2.5%

4@-2.5%

DT-3

115

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28F15CUEENEG

X48M28F30CUEENEG

X48M28F45CUEENEG

8,770.

9,900.

13,100.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28F75CUEENEG

X48M28F12CUEENEG

X48M28F49CUEENEG

16,200.

21,900.

31,000.

225

300

2@+2.5%

4@-2.5%

DT-3

115

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28F22CUEENEG

X48M28F33CUEENEG

34,900.

39,900.

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%

DT-3

115

30

39-1/4

20-1/4

26-1/4

14-1/4

19-1/4

320

420

650

762

997

514

667

362

489

145

191

295

910A

912A

914B

200X

WS31

WS33

350.

X48M28F15TCUEENEG

X48M28F30TCUEENEG

X48M28F45TCUEENEG

8,790.

9,920.

13,120.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

46-5/8

56-1/4

62-1/4

28

31-1/4

23

24-1/4

30-1/4

850

2000

2170

1184

1429

1581

711

794

584

616

768

386

909

986

916A

917

918A

200X

WS19

WS34

350.

800.

X48M28F75TCUEENEG

X48M28F12TCUEENEG

X48M28F49TCUEENEG

16,250.

22,000.

31,100.

225

300

2@+2.5%

4@-2.5%

DT-3

115

75

44-1/2

35-3/4

3100

3300

1905

1130

908

1409

1500

919

201X

WS35

1,360.

X48M28F22TCUEENEG

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-41

Transformers

9

K Factor Transformers

Single- and Three-Phase

Vol. 1, Ref. No. [0341]

K Factor Transformers

Single- and Three-Phase, Type KT,

60 Hz, for Nonlinear Loads

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 non-

linear 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.

Design Features

Core

A high grade, nonaging, silicon steel

with high magnetic permeability pro-

vides reduced core induction levels,

preventing saturation as a result of the

higher frequency harmonics and result-

ant peak voltages. In a core approach-

ing 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 cur-

rents in the steel caused by the high

ratios of peak-to-rms currents and volt-

ages found in harmonic loads.

Coils

Windings are continuous wound alu-

minum or optional copper construc-

tion 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

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 bro-

ken down mathematically into a funda-

mental 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 har-

monic 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 Trans-

former 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 nonlin-

ear loads. These currents are generated

by various types of equipment includ-

ing switching mode power supplies

that abruptly switch current on and

off during each line cycle. Switching

mode power supplies or diodecapacitor

Figure 9-1. Harmonic currents found in non-linear loads cause wave shape distortion and create

added stresses on transformers.



November 2003

9-42

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

K Factor Transformers

Single- and Three-Phase Vol. 1, Ref. No. [0342]

power supplies convert ac line voltage

to low voltage dc. This process accom-

plished 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.

Note: Nonlinear is synonymous with the

term non-sinusoidal.

Features, Beneﬁts

and Functions

■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 com-

puter 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.

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 seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution transformers are designed for

60 Hertz operation. Transformers

required for other frequencies are avail-

able 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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 (drip-

proof) enclosure as standard, and are

rated NEMA 3R with the addition of

weathershields.

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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

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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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.

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-43

Transformers

9

K Factor Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

240 x 480 Volts to 120/240 Volts, Aluminum Windings

15

25

37.5



KS-4

150

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

147

212

306

768

956

428

574

402

495

67

96

139

815

816

817

261A

WS15

WS11

350.

HT20P11S15

HT20P11S25

HT20P11S37

1,970.

2,655.

3,240.

50

75

100



KS-4

150

37-5/8

42-1/8

22-5/8

24

19-1/2

23-3/8

340

510

600

956

1070

574

610

495

594

154

232

272

818

819

820

261A

WS11

WS16

350.

800.

HT20P11S50

HT20P11S75

HT20P11S99

3,830.

5,560.

6,910.

15

25

37.5



KS-4

115

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

147

212

306

768

956

428

574

402

495

67

139

815

816

817

261A

WS15

WS11

350.

HT20P11F15

HT20P11F25

HT20P11F37

2,305.

3,040.

3,740.

50

75



KS-4

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

WS11

WS16

350.

800.

HT20P11F50

HT20P11F75

4,450.

6,495.

15

25

37.5



KS-4

80

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

306

340

768

956

428

574

402

495

67

139

154

816

817

818

261A

WS11

350.

HT20P11B15

HT20P11B25

HT20P11B37

2,680.

3,600.

4,435.

50

75



KS-4

80

42-1/8

24

23-3/8

510

600

1070

610

594

232

272

819

820

261A

WS16

800.

HT20P11B50

HT20P11B75

5,210.

7,580.

240 x 480 Volts to 120/240 Volts, Copper Windings

15

25

37.5



KS-4

150

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

165

237

345

768

956

428

574

402

495

75

108

158

815

816

817

261A

WS15

WS11

350.

HT20P11S15CU

HT20P11S25CU

HT20P11S37CU

2,760.

3,720.

4,540.

50

75

100



KS-4

150

37-5/8

42-1/8

22-5/8

24

19-1/2

23-3/8

381

614

700

956

1070

574

610

495

594

173

279

318

818

819

820

261A

WS11

WS16

350.

800.

HT20P11S50CU

HT20P11S75CU

HT20P11S99CU

5,365.

7,785.

9,680.

15

25

37.5



KS-4

115

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

165

237

345

768

956

428

574

402

495

75

108

158

815

816

817

261A

WS15

WS11

350.

HT20P11F15CU

HT20P11F25CU

HT20P11F37CU

3,230.

4,260.

5,240.

50

75



KS-4

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

WS11

WS16

350.

800.

HT20P11F50CU

HT20P11F75CU

6,230.

9,095.

15

25

37.5



KS-4

80

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

237

345

381

768

956

428

574

402

495

108

158

173

816

817

818

261A

WS11

350.

HT20P11B15CU

HT20P11B25CU

HT20P11B37CU

3,750.

5,045.

6,210.

50

75



KS-4

80

42-1/8

24

23-3/8

614

700

1070

610

594

279

318

819

820

261A

WS16

800.

HT20P11B50CU

HT20P11B75CU

7,300.

10,615.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-44

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

K Factor Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

240 x 480 Volts to 120/240 Volts, Aluminum Windings

15

25

37.5



KS-13

150

30-1/4

37-5/8

16-7/8

22-5/8

15-7/8

19-1/2

147

306

340

768

956

428

574

402

495

67

139

154

815

817

818

261A

WS15

WS11

350.

NT20P11S15

NT20P11S25

NT20P11S37

2,620.

3,520.

4,320.

50

75



KS-13

150

42-1/8

24

23-3/8

510

600

1070

610

594

232

272

819

820

261A

WS16

800.

NT20P11S50

NT20P11S75

5,100.

7,400.

15

25

37.5



KS-13

115

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

306

340

768

956

428

574

402

495

67

139

154

816

817

818

261A

WS11

350.

NT20P11F15

NT20P11F25

NT20P11F37

3,060.

4,050.

4,980.

50

75



KS-13

115

42-1/8

24

23-3/8

510

600

1070

610

594

232

272

819

820

261A

WS16

800.

NT20P11F50

NT20P11F75

5,920.

8,660.

15

25

37.5



KS-13

80

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

212

306

340

768

956

428

574

402

495

67

139

154

816

817

818

261A

WS11

350.

NT20P11B15

NT20P11B25

NT20P11B37

3,560.

4,800.

5,900.

50

75



KS-13

80

42-1/8

24

23-3/8

510

600

1070

610

594

232

272

819

820

261A

WS16

800.

NT20P11B50

NT20P11B75

6,940.

10,100.

240 x 480 Volts to 120/240 Volts, Copper Windings

15

25

37.5



KS-13

150

30-1/4

37-5/8

16-7/8

22-5/8

15-7/8

19-1/2

165

345

381

768

956

428

574

402

495

75

158

173

815

817

818

261A

WS15

WS11

350.

NT20P11S15CU

NT20P11S25CU

NT20P11S37CU

3,670.

4,930.

6,050.

50

75



KS-13

150

42-1/8

24

23-3/8

614

700

1070

610

594

279

318

819

820

261A

WS16

800.

NT20P11S50CU

NT20P11S75CU

7,140.

10,360.

15

25

37.5



KS-13

115

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

237

345

381

768

956

428

574

402

495

108

158

173

816

817

818

261A

WS11

350.

NT20P11F15CU

NT20P11F25CU

NT20P11F37CU

4,285.

5,670.

6,975.

50

75



KS-13

115

42-1/8

24

23-3/8

614

700

1070

610

594

279

318

819

820

261A

WS16

800.

NT20P11F50CU

NT20P11F75CU

8,290.

12,125.

15

25

37.5



KS-13

80

31-1/4

37-5/8

22-5/8

17-1/2

19-1/2

237

345

381

768

956

428

574

402

495

108

158

173

816

817

818

261A

WS11

350.

NT20P11B15CU

NT20P11B25CU

NT20P11B37CU

4,985.

6,720.

8,260.

50

75



KS-13

80

42-1/8

24

23-3/8

614

700

1070

610

594

279

318

819

820

261A

WS16

800.

NT20P11B50CU

NT20P11B75CU

9,720.

14,140.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-45

Transformers

9

K Factor Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 208Y/120 Volts

15

30

45

2@+2.5%

4@-2.5%

KT

150

30-1/8

20-1/8

14-1/8

230

310

765

511

359

104

140

FR910A

FR912A

283B

WS31

350.

H48M28T15A

H48M28T30A

H48M28T45A

1,850.

2,570.

3,090.

75

112.5

150

2@+2.5%

4@-2.5%

KT

150

39-3/8

56

26-1/8

31-1/4

19-1/8

24-1/4

480

600

1100

1000

1422

663

793

485

616

217

272

499

FR914B

FR915B

FR917

283B

WS33

WS34

350.

800.

H48M28T75A

H48M28T12A

H48M28T49A

4,360.

5,975.

8,015.

225

300

500

2@+2.5%

4@-2.5%

KT

150

56

75

31-1/4

44-1/2

24-1/4

36

1100

2400

2800

1422

1905

793

1130

616

914

499

1088

1270

FR917

FR919

283B

292A

WS34

WS35

800.

1,360.

H48M28T22A

H48M28T33B

H48M28T55A

11,910.

16,330.

25,060.

15

30

45

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

480

765

1000

511

663

359

485

104

217

FR910A

FR914B

283B

WS31

WS33

350.

H48M28F15A

H48M28F30A

H48M28F45A

2,040.

2,820.

3,400.

75

112.5

150

2@+2.5%

4@-2.5%

KT

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

WS33

WS19

WS34

350.

800.

H48M28F75A

H48M28F12A

H48M28F49A

4,690.

6,540.

8,530.

225

300

500

2@+2.5%

4@-2.5%

KT

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

WS34

WS35

WS36

800.

1,360.

H48M28F22A

H48M28F33A

H48M28F55A

13,040.

19,060.

27,560.

15

30

45

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

359

485

104

140

217

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

H48M28B15A

H48M28B30A

H48M28B45A

2,350.

2,970.

4,475.

75

112.5

150

2@+2.5%

4@-2.5%

KT

80

39-3/8

56

26-1/8

31-1/4

19-1/8

24-1/4

600

1100

1000

1422

663

793

485

616

272

499

FR915B

FR917

283B

WS33

WS34

350.

800.

H48M28B75A

H48M28B12A

H48M28B49A

5,680.

8,000.

11,660.

225

300

500

2@+2.5%

4@-2.5%

KT

80

62-1/4

75

31-1/4

44-1/2

30-1/4

36

35-3/4

1600

2400

3600

1581

1905

794

1130

1129

768

914

908

728

1088

1636

FR918A

FR919

FR920

283B

292A

WS34

WS35

800.

1,360.

H48M28B22A

H48M28B33A

H48M28B55A

16,430.

21,200.

32,480.

480 ∆ Volts to 208Y/120 Volts (Copper Windings)

15

30

45

2@+2.5%

4@-2.5%

KT

150

30-1/8

20-1/8

14-1/8

300

370

765

511

359

136

168

FR910A

FR912A

283B

WS31

350.

H48M28T15CU

H48M28T30CU

H48M28T45CU

2,260.

2,750.

3,545.

75

112.5

150

2@+2.5%

4@-2.5%

KT

150

39-3/8

56

26-1/8

31-1/4

19-1/8

24-1/4

675

1200

1000

1422

663

793

485

616

306

545

FR914B

FR915B

FR917

283B

WS33

WS34

350.

800.

H48M28T75CU

H48M28T12CU

H48M28T49CU

5,215.

6,315.

9,020.

225

300

500

2@+2.5%

4@-2.5%

KT

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1200

2150

3600

1422

1581

1905

793

794

1130

616

768

914

545

977

1636

FR917

FR918A

FR919

283B

292A

WS34

WS35

800.

1,360.

H48M28T22CU

H48M28T33CU

H48M28T55CU

12,510.

18,530.

26,300.

15

30

45

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

575

765

1000

511

663

359

485

136

261

FR910A

FR914B

283B

WS31

WS33

350.

H48M28F15CU

H48M28F30CU

H48M28F45CU

2,770.

3,850.

4,635.

75

112.5

150

2@+2.5%

4@-2.5%

KT

115

39-3/8

46-1/2

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

WS33

WS19

WS34

350.

800.

H48M28F75CU

H48M28F12CU

H48M28F49CU

5,420.

7,075.

9,690.

225

300

500

2@+2.5%

4@-2.5%

KT

115

62-1/4

75

31-1/4

44-1/2

30-1/4

36

35-3/4

2150

3100

3600

1581

1905

794

1130

1129

768

914

908

977

1409

1636

FR918A

FR919

FR920

283B

292A

WS34

WS35

800.

1,360.

—

H48M28F22CU

H48M28F33CU

H48M28F55CU

15,675.

22,860.

28,940.

15

30

45

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

370

575

765

1000

511

663

359

485

136

168

261

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

H48M28B15CU

H48M28B30CU

H48M28B45CU

3,145.

4,360.

5,370.

75

112.5

150

2@+2.5%

4@-2.5%

KT

80

39-3/8

56

26-1/8

31-1/4

19-1/8

24-1/4

675

1200

1000

1422

663

793

485

616

306

545

FR915B

FR917

283B

WS33

WS34

350.

800.

H48M28B75CU

H48M28B12CU

H48M28B49CU

6,760.

9,240.

12,060.

225

300

500

2@+2.5%

4@-2.5%

KT

80

62-1/4

75

31-1/4

44-1/2

30-1/4

36

35-3/4

2150

3100

3600

1581

1905

794

1130

1129

768

914

908

977

1409

1636

FR918A

FR919

FR920

283B

292A

WS34

WS35

800.

1,360.

H48M28B22CU

H48M28B33CU

H48M28B55CU

18,050.

26,100.

34,200.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-46

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

K Factor Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 208Y/120 Volts

15

30

45

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

359

485

104

140

217

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

N48M28T15A

N48M28T30A

N48M28T45A

1,970.

2,845.

3,370.

75

112.5

150

2@+2.5%

4@-2.5%

KT

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

WS33

WS19

WS34

350.

800.

N48M28T75A

N48M28T12A

N48M28T49A

4,660.

6,535.

8,780.

225

300

500

2@+2.5%

4@-2.5%

KT

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

WS34

WS35

WS36

800.

1,360.

N48M28T22A

N48M28T33A

N48M28T55A

12,140.

17,870.

27,570.

15

30

45

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

359

485

104

140

217

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

N48M28F15A

N48M28F30A

N48M28F45A

2,410.

2,985.

3,890.

75

112.5

150

2@+2.5%

4@-2.5%

KT

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

WS33

WS19

WS34

350.

800.

N48M28F75A

N48M28F12A

N48M28F49A

5,315.

8,120.

9,560.

225

300

500

2@+2.5%

4@-2.5%

KT

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

WS34

WS35

WS36

800.

1,360.

N48M28F22A

N48M28F33A

N48M28F55A

13,390.

20,100.

30,400.

15

30

45

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

359

485

104

140

217

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

N48M28B15A

N48M28B30A

N48M28B45A

2,840.

3,730.

4,755.

75

112.5

150

2@+2.5%

4@-2.5%

KT

80

46-1/8

56

62-1/4

28

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

WS33

WS34

350.

800.

N48M28B75A

N48M28B12A

N48M28B49A

6,160.

8,840.

12,565.

225

300

2@+2.5%

4@-2.5%

KT

80

75

44-1/2

36

2400

3600

1905

1130

914

1088

1636

FR919

292A

WS35

1,360.

N48M28B22A

N48M28B33CU

17,140.

26,780.

480 ∆ Volts to 208Y/120 Volts (Copper Windings)

15

30

45

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

370

575

65

765

1000

511

663

359

485

136

168

261

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

N48M28T15CU

N48M28T30CU

N48M28T45CU

2,540.

2,890.

4,270.

75

112.5

150

2@+2.5%

4@-2.5%

KT

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

WS33

WS19

WS34

350.

800.

N48M28T75CU

N48M28T12CU

N48M28T49CU

5,690.

7,460.

9,770.

225

300

500

2@+2.5%

4@-2.5%

KT

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.

1,360.

—

N48M28T22CU

N48M28T33CU

N48M28T55CU 

13,440.

22,330.

28,930.

15

30

45

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

370

575

65

765

1000

511

663

359

485

136

168

261

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

N48M28F15CU

N48M28F30CU

N48M28F45CU

2,785.

3,295.

4,430.

75

112.5

150

2@+2.5%

4@-2.5%

KT

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

WS33

WS19

WS34

350.

800.

N48M28F75CU

N48M28F12CU

N48M28F49CU

6,290.

9,025.

11,950.

225

300

500

2@+2.5%

4@-2.5%

KT

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.

1,360.

—

N48M28F22CU

N48M28F33CU

N48M28F55CU 

16,300.

24,560.

31,850.

15

30

45

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

370

575

65

765

1000

511

663

359

485

136

168

261

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

N48M28B15CU

N48M28B30CU

N48M28B45CU

3,125.

4,140.

5,570.

75

112.5

150

2@+2.5%

4@-2.5%

KT

80

46-1/8

56

62-1/4

28

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

283B

WS33

WS34

350.

800.

N48M28B75CU

N48M28B12CU

N48M28B49CU

7,100.

10,270.

13,480.

225

300

2@+2.5%

4@-2.5%

KT

80

75

44-1/2

36

3100

3600

1905

1130

914

1409

1636

FR919

292A

WS35

1,360.

N48M28B22CU

N48M28B33CU

20,520.

26,780.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-47

Transformers

9

K Factor Transformers

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 208Y/120 Volts

15

30

45

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

358

485

104

140

217

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

G48M28T15A

G48M28T30A

G48M28T45A

2,050.

3,010.

3,960.

75

112.5

150

2@+2.5%

4@-2.5%

KT

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

WS33

WS19

WS34

350.

800.

G48M28T75A

G48M28T12A

G48M28T49A

5,600.

8,780.

9,860.

225

300

500

2@+2.5%

4@-2.5%

KT

150

62-1/4

75



31-1/4

44-1/2



30-1/4

36



1600

2400



1581

1905



794

1130



768

914



728

1088



FR918A

FR919



283B

292A



WS34

WS35



800.

1,360.

—

G48M28T22A

G48M28T33A

G48M28T55A 

13,420.

18,530.

30,700.

15

30

45

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

663

358

485

104

140

217

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

G48M28F15A

G48M28F30A

G48M28F45A

2,655.

3,460.

4,560.

75

112.5

150

2@+2.5%

4@-2.5%

KT

115

46-1/8

56

62-1/4

28

31-1/4

23

24-1/4

30-1/4

780

1100

1600

1171

1422

1581

712

793

794

585

616

768

354

499

728

FR916A

FR917

FR918A

283B

WS33

WS34

350.

800.

G48M28F75A

G48M28F12A

G48M28F49A

6,440.

9,220.

10,850.

225

300

500

2@+2.5%

4@-2.5%

KT

115

75



44-1/2



36



2400

3100



1905



1130



914



1088

1315



FR919

FR920



283B

292A



WS35



800.

1,360.

—

G48M28F22A

G48M28F33A

G48M28F55A 

15,600.

20,650.

35,300.

15

30

45

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

480

600

765

1000

511

663

358

485

140

217

272

FR912A

FR914B

FR915B

283B

WS31

350.

G48M28B15A

G48M28B30A

G48M28B45A

2,990.

4,060.

5,350.

75

112.5

150

2@+2.5%

4@-2.5%

KT

80

46-1/8

56

62-1/4

28

31-1/4

23

24-1/4

30-1/4

860

1100

1600

1171

1422

1581

712

793

794

585

616

768

389

499

728

FR916A

FR917

FR918A

283B

WS33

WS34

350.

800.

G48M28B75A

G48M28B12A

G48M28B49A

7,560.

9,860.

13,400.

225

300

2@+2.5%

4@-2.5%

KT

80

75



44-1/2



36



2400



1905



1130



914



1088



FR919



283B



WS35



800.

—

G48M28B22A

G48M28B33A 

19,800.

25,700.

480 ∆ Volts to 208Y/120 Volts (Copper Windings)

15

30

45

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

370

575

765

1000

511

663

358

485

136

168

261

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

G48M28T15CU

G48M28T30CU

G48M28T45CU

2,770.

4,120.

5,430.

75

112.5

150

2@+2.5%

4@-2.5%

KT

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

WS33

WS19

WS34

350.

800.

G48M28T75CU

G48M28T12CU

G48M28T49CU

7,660.

11,400.

12,820.

225

300

500

2@+2.5%

4@-2.5%

KT

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.

1,360.

—

G48M28T22CU

G48M28T33CU

G48M28T55CU 

17,400.

24,560.

39,900.

15

30

45

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

370

575

765

1000

511

663

358

485

136

168

261

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

G48M28F15CU

G48M28F30CU

G48M28F45CU

3,180.

4,665.

6,140.

75

112.5

150

2@+2.5%

4@-2.5%

KT

115

46-1/8

56

62-1/4

28

31-1/4

23

24-1/4

30-1/4

780

1200

2150

1171

1422

1581

712

793

794

585

616

768

354

545

977

FR916A

FR917

FR918A

283B

WS33

WS34

350.

800.

G48M28F75CU

G48M28F12CU

G48M28F49CU

8,680.

12,300.

13,800.

225

300

500

2@+2.5%

4@-2.5%

KT

115

75



44-1/2



36



3100

3600



1905



1130



914



1409

1636



FR919

FR920



283B

292A



WS35



800.

1,360.

—

G48M28F22CU

G48M28F33CU

G48M28F55CU 

18,800.

27,000.

46,000.

15

30

45

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

370

575

675

765

1000

511

663

358

485

168

261

306

FR912A

FR914B

FR915B

283B

WS31

WS33

350.

G48M28B15CU

G48M28B30CU

G48M28B45CU

3,480.

5,270.

6,740.

75

112.5

150

2@+2.5%

4@-2.5%

KT

80

46-1/8

56

62-1/4

28

31-1/4

23

24-1/4

30-1/4

860

1200

2150

1171

1422

1581

712

793

794

585

616

768

389

545

977

FR916A

FR917

FR918A

283B

WS33

WS34

350.

800.

G48M28B75CU

G48M28B12CU

G48M28B49CU

9,520.

14,050.

15,780.

225

300

2@+2.5%

4@-2.5%

KT

80

75



44-1/2



36



3100



1905



1130



914



1409



FR919



292A



WS35



1,360.

—

G48M28B22CU

G48M28B33CU 

21,470.

29,650.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-48

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

K Factor Transformers

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

Table 9-52. Type KT-13 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 13

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

208 ∆ Volts to 208Y/120 Volts

15

30

45

75

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

283A

WS31

WS33

350.

H29M28T15A

H29M28T30A

H29M28T45A

H29M28T75A

2,590.

3,590.

4,320.

6,100.

112.5

150

225

300

1@+5%

—

2@-5%

KT

150

39-3/8

56

62-1/4

75

26-1/8

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

1130

486

616

768

914

273

499

728

1089

FR915B

FR917

FR918A

FR919

325A

287A

297B

WS33

WS34

WS35

350.

800.

1,360.

H29R28T12A

H29R28T49A

H29R28T22A

H29G28T33A

7,940.

11,200.

16,670.

22,800.

15

30

45

75

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

480

600

765

1000

511

664

359

486

104

218

273

FR910A

FR914B

FR915B

283A

WS31

WS33

350.

H29M28F15A

H29M28F30A

H29M28F45A

H29M28F75A

2,850.

3,940.

4,750.

6,550.

112.5

150

225

300

1@+5%

—

2@-5%

KT

115

46-1/8

56

62-1/4

75

28

31-1/4

44-1/2

23

24-1/4

30-1/4

36

760

1100

1600

2400

1171

1422

1581

1905

712

794

1130

585

616

768

914

345

499

728

1089

FR916A

FR917

FR918A

FR919

325A

287A

297B

WS19

WS34

WS35

350.

800.

1,360.

H29R28F12A

H29R28F49A

H29R28F22A

H29G28F33A

9,150.

11,900.

18,200.

26,600.

15

30

45

75

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

600

765

1000

511

664

359

486

104

141

218

273

FR910A

FR912A

FR914B

FR915B

283A

WS31

WS33

350.

H29M28B15A

H29M28B30A

H29M28B45A

H29M28B75A

3,290.

4,150.

6,260.

7,950.

112.5

150

225

1@+5%

2@-5%

KT

80

56

75

31-1/4

44-1/2

24-1/4

36

1100

2400

1422

1905

794

1130

616

914

499

1089

FR917

FR919

287A

297B

WS34

WS35

800.

—

H29R28B12A

H29R28B49A

H29R28B22A

11,100.

16,300.

23,000.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

208 ∆ Volts to 208Y/120 Volts

15

30

45

75

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

600

765

1000

511

664

359

486

104

141

218

273

FR910A

FR912A

FR914B

FR915B

283A

WS31

WS33

350.

N29M28T15A

N29M28T30A

N29M28T45A

N29M28T75A

2,760.

3,980.

4,720.

6,520.

112.5

150

225

300

1@+5%

—

2@-5%

KT

150

46-1/8

56

62-1/4

75

28

31-1/4

44-1/2

23

24-1/4

30-1/4

36

820

1100

1600

2400

1171

1422

1581

1905

712

794

1130

585

616

768

914

372

499

728

1089

FR916A

FR917

FR918A

FR919

287A

297B

WS19

WS34

WS35

350.

800.

1,360.

N29R28T12A

N29R28T49A

N29R28T22A

N29G28T33A

9,150.

12,300.

17,000.

25,000.

15

30

45

75

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

600

765

1000

511

664

359

486

104

141

218

273

FR910A

FR912A

FR914B

FR915B

283A

WS31

WS33

350.

N29M28F15A

N29M28F30A

N29M28F45A

N29M28F75A

3,175.

4,580.

5,430.

7,500.

112.5

150

225

300

1@+5%

—

2@-5%

KT

115

46-1/8

56

62-1/4

75

28

31-1/4

44-1/2

23

24-1/4

30-1/4

36

860

1100

1600

2400

1171

1422

1581

1905

712

794

1130

585

616

768

914

389

499

728

1089

FR916A

FR917

FR918A

FR919

287A

297B

WS19

WS34

WS35

350.

800.

1,360.

N29R28F12A

N29R28F49A

N29R28F22A

N29G28F33A

10,520.

14,150.

19,550.

28,700.

15

30

45

75

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

46-1/8

20-1/8

26-1/8

28

14-1/8

19-1/8

23

230

310

480

820

765

1000

1171

511

664

712

359

486

585

104

141

218

389

FR910A

FR912A

FR914B

FR916A

283A

WS31

WS33

350.

N29M28B15A

N29M28B30A

N29M28B45A

N29M28B75A

3,720.

5,370.

6,370.

8,800.

112.5

150

225

1@+5%

—

2@-5%

KT

80

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1200

1600

2400

1422

1581

1905

794

1130

616

768

914

544

728

1089

FR917

FR918A

FR919

287A

297B

WS34

WS35

350.

800.

1,360.

N29R28B12A

N29R28B49A

N29G28B22A

12,350.

16,600.

22,900.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-49

Transformers

9

K Factor Transformers

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

Table 9-54. Type KT-13 — Transformers for Non-Sinusoidal Current Loads with K Factor Up to 13

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 480Y/277 Volts

15

30

45

75

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

283B

WS31

WS33

350.

H48M47T15A

H48M47T30A

H48M47T45A

H48M47T75A

2,220.

3,100.

3,700.

5,230.

112.5

150

225

300

2@+2.5%

4@-2.5%

KT

150

39-3/8

56

62-1/4

75

26-1/8

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

1130

486

616

768

914

273

499

728

1089

FR915B

FR917

FR918A

FR919

283B

292A

WS33

WS34

WS35

350.

800.

1,360.

H48M47T12A

H48M47T49A

H48M47T22A

H48M47T33A

7,170.

9,610.

14,290.

19,590.

15

30

45

75

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

480

600

765

1000

511

664

359

486

104

218

273

FR910A

FR914B

FR915B

283B

WS31

WS33

350.

H48M47F15A

H48M47F30A

H48M47F45A

H48M47F75A

2,550.

3,560.

4,250.

6,010.

112.5

150

225

300

2@+2.5%

4@-2.5%

KT

115

46-1/8

56

62-1/4

75

28

31-1/4

44-1/2

23

24-1/4

30-1/4

36

960

1100

1600

2400

1171

1422

1581

1905

712

794

1130

585

616

768

914

434

499

728

1089

FR916A

FR917

FR918A

FR919

283B

292A

WS19

WS34

WS35

350.

800.

1,360.

H48M47F12A

H48M47F49A

H48M47F22A

H48M47F33A

8,250.

11,060.

16,440.

22,540.

15

30

45

75

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

600

765

1000

511

664

359

486

104

141

218

273

FR910A

FR912A

FR914B

FR915B

283B

WS31

WS33

350.

H48M47B15A

H48M47B30A

H48M47B45A

H48M47B75A

2,995.

4,185.

4,990.

7,050.

112.5

150

225

300

2@+2.5%

4@-2.5%

KT

80

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1089

FR917

FR918A

FR919

283B

292A

WS34

WS35

800.

1,360.

H48M47B12A

H48M47B49A

H48M47B22A

H48M47B33A

9,680.

12,970.

19,290.

26,440.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 480Y/277 Volts

15

30

45

75

2@+2.5%

4@-2.5%

KT

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

600

765

1000

511

664

359

486

104

141

218

273

FR910A

FR912A

FR914B

FR915B

283B

WS31

WS33

350.

N48M47T15A

N48M47T30A

N48M47T45A

N48M47T75A

2,360.

3,415.

4,040.

5,590.

112.5

150

225

300

2@+2.5%

4@-2.5%

KT

150

46-1/8

56

62-1/4

75

28

31-1/4

44-1/2

23

24-1/4

30-1/4

36

760

1100

1600

2400

1171

1422

1581

1905

712

794

1130

585

616

768

914

345

499

728

1089

FR916A

FR917

FR918A

FR919

283B

292A

WS19

WS34

WS35

350.

800.

1,360.

N48M47T12A

N48M47T49A

N48M47T22A

N48M47T33A

7,840.

10,530.

14,560.

21,440.

15

30

45

75

2@+2.5%

4@-2.5%

KT

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

600

765

1000

511

664

359

486

104

141

218

273

FR910A

FR912A

FR914B

FR915B

283B

WS31

WS33

350.

N48M47F15A

N48M47F30A

N48M47F45A

N48M47F75A

2,715.

3,930.

4,650.

6,430.

112.5

150

225

300

2@+2.5%

4@-2.5%

KT

115

46-1/8

56

62-1/4

75

28

31-1/4

44-1/2

23

24-1/4

30-1/4

36

760

1100

1600

2400

1171

1422

1581

1905

712

794

1130

585

616

768

914

345

499

728

1089

FR916A

FR917

FR918A

FR919

283B

292A

WS19

WS34

WS35

350.

800.

1,360.

N48M47F12A

N48M47F49A

N48M47F22A

N48M47F33A

9,020.

12,120.

16,750.

24,670.

15

30

45

75

2@+2.5%

4@-2.5%

KT

80

30-1/8

39-3/8

46-1/8

20-1/8

26-1/8

28

14-1/8

19-1/8

23

230

310

480

760

765

1000

1171

511

664

712

359

486

585

104

141

218

345

FR910A

FR912A

FR914B

FR916A

283B

WS31

WS33

350.

N48M47B15A

N48M47B30A

N48M47B45A

N48M47B75A

3,180.

4,600.

5,450.

7,540.

112.5

150

225

300

2@+2.5%

4@-2.5%

KT

80

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

3600

1422

1581

1905

794

1130

616

768

914

499

728

1089

1636

FR917

FR918A

FR919

283B

292A

WS34

WS35

350.

800.

1,360.

N48M47B12A

N48M47B49A

N48M47B22A

N48M47B33CU

10,580.

14,200.

19,650.

36,440.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-50

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Drive Isolation Transformers

Three-Phase Vol. 1, Ref. No. [0350]

Three-Phase, Type MD, 60 Hz

Type MD

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 specif-

ically 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.

Features, Beneﬁts

and Functions

■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 o

per-

ation in a 40°C ambient maximum.

■Full current neutral.

■Thermoguard protection embedded

in coils to indicate that high temper-

atures (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 dry-

type distribution transformers by

Eaton Corporation are seismically

qualiﬁed, and exceed requirements of

the Uniform Building Code (UBC) and

California Code Title 24.

Options and Accessories

■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 dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-51

Transformers

9

Drive Isolation Transformers

Three-Phase

Vol. 1, Ref. No. [0351]

Enclosures

Eaton’s Cutler-Hammer ventilated

transformers, Type MD, utilize a NEMA

2 rated (drip-proof) enclosure as stan-

dard, and are rated NEMA 3R with the

addition of weathershields.

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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 9-56. Average Sound Levels

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.

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



November 2003

9-52

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Drive Isolation Transformers

Three-Phase Vol. 1, Ref. No. [0352]

Product Selection

Additional Product Selection information begins on Page 9-136.

Table 9-57. Drive Isolation Transformers

Refer to your Cutler-Hammer sales ofﬁce.

Not Seismic Qualiﬁed.

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

Hp kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

208 ∆ Volts to 230Y/133 Volts

5

7.5

10

7.5

11

14

1@+5%

1@-5%

DT-3

150

25

20-1/8

14-1/8

152

635

511

358

69

FR909

286L

WS31

350.

MD075E85

MD11E85

MD14E85

1,400.

1,450.

1,550.

15

20

25

20

27

34

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286L

WS31

350.

MD20E85

MD27E85

MD34E85

1,920.

2,195.

2,430.

30

40

50

40

51

63

1@+5%

1@-5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

765

1000

511

663

358

485

140

217

FR912A

FR914B

286L

WS31

WS33

350.

MD40E85

MD51E85

MD63E85

2,800.

3,165.

3,580.

60

75

100

75

93

118

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

286L

WS33

WS19

350.

MD75E85

MD93E85

MD118E85

3,875.

4,650.

5,440.

125

150

200

145

175

220

1@+5%

1@-5%

DT-3

150

46-1/8

56

28

31-1/4

23

24-1/4

760

1100

1200

1171

1422

712

793

585

616

344

499

FR916A

FR917

286L

WS19

WS34

350.

800.

MD145E85

MD175E85

MD220E85

6,350.

8,030.

9,300.

250

300

275

330

1@+5%

1@-5%

DT-3

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.

1,360.

MD275E85

MD330E85

10,880.

12,925.

208 ∆ Volts to 460Y/266 Volts

5

7.5

10

7.5

11

14

1@+5%

1@-5%

DT-3

150

25

20-1/8

14-1/8

152

635

511

358

69

FR909

286L

WS31

350.

MD075E86

MD11E86

MD14E86

1,400.

1,450.

1,550.

15

20

25

20

27

34

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286L

WS31

350.

MD20E86

MD27E86

MD34E86

1,920.

2,195.

2,430.

30

40

50

40

51

63

1@+5%

1@-5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

765

1000

511

663

358

485

140

217

FR912A

FR914B

286L

WS31

WS33

350.

MD40E86

MD51E86

MD63E86

2,800.

3,165.

3,580.

60

75

100

75

93

118

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

286L

WS33

WS19

350.

MD75E86

MD93E86

MD118E86

3,875.

4,650.

5,440.

125

150

200

145

175

220

1@+5%

1@-5%

DT-3

150

46-1/8

56

28

31-1/4

23

24-1/4

760

1100

1200

1171

1422

712

793

585

616

344

499

FR916A

FR917

286L

WS19

WS34

350.

800.

MD145E86

MD175E86

MD220E86

6,350.

8,030.

9,300.

250

300

275

330

1@+5%

1@-5%

DT-3

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.

1,360.

MD275E86

MD330E86

10,880.

12,925.

230 ∆ Volts to 230Y/133 Volts

5

7.5

10

7.5

11

14

1@+5%

1@-5%

DT-3

150

25

20-1/8

14-1/8

152

635

511

358

69

FR909

286A

WS31

350.

MD075E88

MD11E88

MD14E88

1,400.

1,450.

1,550.

15

20

25

20

27

34

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286A

WS31

350.

MD20E88

MD27E88

MD34E88

1,920.

2,195.

2,430.

30

40

50

40

51

63

1@+5%

1@-5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

765

1000

511

663

358

485

140

217

FR912A

FR914B

286A

WS31

WS33

350.

MD40E88

MD51E88

MD63E88

2,800.

3,165.

3,580.

60

75

100

75

93

118

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

286A

WS33

WS19

350.

MD75E88

MD93E88

MD118E88

3,875.

4,650.

5,440.

125

150

200

145

175

220

1@+5%

1@-5%

DT-3

150

46-1/8

56

28

31-1/4

23

24-1/4

760

1100

1200

1171

1422

712

793

585

616

344

499

FR916A

FR917

286A

WS19

WS34

350.

800.

MD145E88

MD175E88

MD220E88

6,350.

8,030.

9,300.

250

300

400

275

330

440

1@+5%

1@-5%

DT-3

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.

1,360.

—

MD275E88

MD330E88

MD440E88 

10,880.

12,925.

18,900.

500

600

700

800

550

660

770

880

1@+5%

1@-5%

DT-3

150



—

MD550E88 

MD660E88 

MD770E88 

MD880E88 

22,800.

27,600.

34,400.

39,300.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-53

Transformers

9

Drive Isolation Transformers

Three-Phase

Vol. 1, Ref. No. [0353]

Table 9-58. Drive Isolation Transformers

Refer to your Cutler-Hammer sales ofﬁce.

Not Seismic Qualiﬁed.

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

Hp kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

230 ∆ Volts to 460Y/266 Volts

5

7.5

10

15

7.5

11

14

20

1@+5%

1@-5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

635

765

511

358

69

104

FR909

FR910A

286A

WS31

350.

MD075E89

MD11E89

MD14E89

MD20E89

1,400.

1,450.

1,550.

1,920.

20

25

30

27

34

40

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286A

WS31

350.

MD27E89

MD34E89

MD40E89

2,195.

2,430.

2,800.

40

50

60

51

63

75

1@+5%

1@-5%

DT-3

150

39-3/8

26-1/8

19-1/8

480

1000

663

485

217

FR914B

286A

WS33

350.

MD51E89

MD63E89

MD75E89

3,165.

3,580.

3,875.

75

100

125

93

118

145

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

600

760

1000

1171

663

712

485

585

272

344

FR915B

FR916A

286A

WS33

WS19

350.

MD93E89

MD118E89

MD145E89

4,650.

5,440.

6,350.

150

200

250

175

220

275

1@+5%

1@-5%

DT-3

150

56

62-1/4

31-1/4

24-1/4

30-1/4

1100

1200

1600

1422

1581

793

794

616

768

499

728

FR917

FR918A

286A

WS34

800.

MD175E89

MD220E89

MD275E89

8,030.

9,300.

10,880.

300

400

500

330

440

550

1@+5%

1@-5%

DT-3

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%

DT-3

150



—

MD660E89 

MD770E89 

MD880E89 

27,600.

34,400.

39,300.

230 ∆ Volts to 575Y/332 Volts

5

7.5

10

7.5

11

14

1@+5%

1@-5%

DT-3

150

25

20-1/8

14-1/8

152

635

511

358

69

FR909

286A

WS31

350.

MD075E90

MD11E90

MD14E90

1,400.

1,450.

1,550.

15

20

25

20

27

34

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286A

WS31

350.

MD20E90

MD27E90

MD34E90

1,920.

2,195.

2,430.

30

40

50

40

51

63

1@+5%

1@-5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

765

1000

511

663

358

485

140

217

FR912A

FR914B

286A

WS31

WS33

350.

MD40E90

MD51E90

MD63E90

2,800.

3,165.

3,580.

60

75

100

75

93

118

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

286A

WS33

WS19

350.

MD75E90

MD93E90

MD118E90

3,875.

4,650.

5,440.

125

150

200

145

175

220

1@+5%

1@-5%

DT-3

150

46-1/8

56

28

31-1/4

23

24-1/4

760

1100

1200

1171

1422

712

793

585

616

344

499

FR916A

FR917

286A

WS19

WS34

350.

800.

MD145E90

MD175E90

MD220E90

6,350.

8,030.

9,300.

250

300

400

275

330

440

1@+5%

1@-5%

DT-3

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.

1,360.

—

MD275E90

MD330E90

MD440E90 

10,880.

12,925.

18,900.

500

600

700

550

660

770

1@+5%

1@-5%

DT-3

150



—

MD550E90 

MD660E90 

MD770E90 

22,800.

27,600.

34,400.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-54

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Drive Isolation Transformers

Three-Phase Vol. 1, Ref. No. [0354]

Table 9-59. Drive Isolation Transformers

Refer to your Cutler-Hammer sales ofﬁce.

Not Seismic Qualiﬁed.

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

Hp kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

460 ∆ Volts to 230Y/133 Volts

5

7.5

10

15

7.5

11

14

20

1@+5%

1@-5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

635

765

511

358

69

104

FR909

FR910A

286D

WS31

350.

MD075E91

MD11E91

MD14E91

MD20E91

1,400.

1,450.

1,550.

1,920.

20

25

30

27

34

40

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286D

WS31

350.

MD27E91

MD34E91

MD40E91

2,195.

2,430.

2,800.

40

50

60

51

63

75

1@+5%

1@-5%

DT-3

150

39-3/8

26-1/8

19-1/8

480

1000

663

485

217

FR914B

286D

WS33

350.

MD51E91

MD63E91

MD75E91

3,165.

3,580.

3,875.

75

100

125

93

118

145

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

600

760

1000

1171

663

712

485

585

272

344

FR915B

FR916A

286D

WS33

WS19

350.

MD93E91

MD118E91

MD145E91

4,650.

5,440.

6,350.

150

200

250

175

220

275

1@+5%

1@-5%

DT-3

150

56

62-1/4

31-1/4

24-1/4

30-1/4

1100

1200

1600

1422

1581

793

794

616

768

499

728

FR917

FR918A

286D

WS34

800.

MD175E91

MD220E91

MD275E91

8,030.

9,300.

10,880.

300

400

500

330

440

550

1@+5%

1@-5%

DT-3

150

75

44-1/2

36

2200

2900

1905

1130

914

1000

1315

FR919

FR920

318E

WS35

1,360.

MD330E91

MD440E91

MD550E91

12,925.

18,900.

22,800.

600

700

800

660

770

880

1@+5%

1@-5%

DT-3

150

75



44-1/2



36



2900



1905



1130



914



1315



FR920



318E



WS35



1,360.

—

MD660E91

MD770E91

MD880E91 

27,600.

34,400.

39,300.

—

1000

1250

1500

1@+5%

1@-5%

DT-3

150



—

MD1000E91 

MD1250E91 

MD1500E91 

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%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

635

765

511

358

69

104

FR909

FR910A

286D

WS31

350.

MD075E92

MD11E92

MD14E92

MD20E92

1,400.

1,450.

1,550.

1,920.

20

25

30

27

34

40

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286D

WS31

350.

MD27E92

MD34E92

MD40E92

2,195.

2,430.

2,800.

40

50

60

51

63

75

1@+5%

1@-5%

DT-3

150

39-3/8

26-1/8

19-1/8

480

1000

663

485

217

FR914B

286D

WS33

350.

MD51E92

MD63E92

MD75E92

3,165.

3,580.

3,875.

75

100

125

93

118

145

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

600

760

1000

1171

663

712

485

585

272

344

FR915B

FR916A

286D

WS33

WS19

350.

MD93E92

MD118E92

MD145E92

4,650.

5,440.

6,350.

150

200

250

175

220

275

1@+5%

1@-5%

DT-3

150

56

62-1/4

31-1/4

24-1/4

30-1/4

1100

1200

1600

1422

1581

793

794

616

768

499

728

FR917

FR918A

286D

WS34

800.

MD175E92

MD220E92

MD275E92

8,030.

9,300.

10,880.

300

400

500

330

440

550

1@+5%

1@-5%

DT-3

150

75

44-1/2

36

2200

2900

1905

1130

914

1000

1315

FR919

318E

WS35

1,360.

MD330E92

MD440E92

MD550E92

12,925.

18,900.

22,800.

600

700

800

660

770

880

1@+5%

1@-5%

DT-3

150

75



44-1/2



36



2900



1905



1130



914



1315



FR920



318E



WS35



1,360.

—

MD660E92

MD770E92

MD880E92 

27,600.

34,400.

39,300.

—

1000

1250

1500

1@+5%

1@-5%

DT-3

150



—

MD1000E92 

MD1250E92 

MD1500E92 

42,570.

49,500.

78,600.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-55

Transformers

9

Drive Isolation Transformers

Three-Phase

Vol. 1, Ref. No. [0355]

Table 9-60. Drive Isolation Transformers

Refer to your Cutler-Hammer sales ofﬁce.

Not Seismic Qualiﬁed.

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

Hp kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

460 ∆ Volts to 575Y/332 Volts

5

7.5

10

7.5

11

14

1@+5%

1@-5%

DT-3

150

25

20-1/8

14-1/8

152

635

511

358

69

FR909

286D

WS31

350.

MD075E93

MD11E93

MD14E93

1,400.

1,450.

1,550.

15

20

25

20

27

34

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286D

WS31

350.

MD20E93

MD27E93

MD34E93

1,920.

2,195.

2,430.

30

40

50

40

51

63

1@+5%

1@-5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

765

1000

511

663

358

485

140

217

FR912A

FR914B

286D

WS31

WS33

350.

MD40E93

MD51E93

MD63E93

2,800.

3,165.

3,580.

60

75

100

75

93

118

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

20-1/8

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

286D

WS33

WS19

350.

MD75E93

MD93E93

MD118E93

3,875.

4,650.

5,440.

125

150

200

145

175

220

1@+5%

1@-5%

DT-3

150

46-1/8

56

28

31-1/4

23

24-1/4

760

1100

1200

1171

1422

712

793

585

616

344

499

FR916A

FR917

286D

WS19

WS34

350.

800.

MD145E93

MD175E93

MD220E93

6,350.

8,030.

9,300.

250

300

400

275

330

440

1@+5%

1@-5%

DT-3

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

286D

318E

WS34

WS35

800.

1,360.

MD275E93

MD330E93

MD440E93

10,880.

12,925.

18,900.

500

600

700

550

660

770

1@+5%

1@-5%

DT-3

150

75

44-1/2

36

2900

1905

1130

914

1315

FR920

318E

WS35

1,360.

MD550E93

MD660E93

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%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

635

765

511

358

69

104

FR909

FR910A

286H

WS31

350.

MD075E94

MD11E94

MD14E94

MD20E94

1,400.

1,450.

1,550.

1,920.

20

25

30

27

34

40

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286H

WS31

350.

MD27E94

MD34E94

MD40E94

2,195.

2,430.

2,800.

40

50

60

51

63

75

1@+5%

1@-5%

DT-3

150

39-3/8

26-1/8

19-1/8

480

1000

663

485

217

FR914B

286H

WS33

350.

MD51E94

MD63E94

MD75E94

3,165.

3,580.

3,875.

75

100

125

93

118

145

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

600

760

1000

1171

663

712

485

585

272

344

FR915B

FR916A

286H

WS33

WS19

350.

MD93E94

MD118E94

MD145E94

4,650.

5,440.

6,350.

150

200

250

175

220

275

1@+5%

1@-5%

DT-3

150

56

62-1/4

31-1/4

24-1/4

30-1/4

1100

1200

1600

1422

1581

793

794

616

768

499

728

FR917

FR918A

286H

WS19

WS34

350.

800.

MD175E94

MD220E94

MD275E94

8,030.

9,300.

10,880.

300

400

500

330

440

550

1@+5%

1@-5%

DT-3

150

75

44-1/2

36

2200

2900

1905

1130

914

1000

1315

FR919

FR920



WS35

1,360.

MD330E94

MD440E94

MD550E94

12,925.

18,900.

22,800.

600

700

800

660

770

880

1@+5%

1@-5%

DT-3

150

75



44-1/2



36



2900



1905



1130



914



1315



FR920



WS35



1,360.

—

MD660E94

MD770E94

MD880E94 

27,600.

34,400.

39,300.

—

1000

1250

1500

1@+5%

1@-5%

DT-3

150



—

MD1000E94 

MD1250E94 

MD1500E94 

42,570.

49,500.

78,600.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-56

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Drive Isolation Transformers

Three-Phase Vol. 1, Ref. No. [0356]

Table 9-61. Drive Isolation Transformers

Refer to your Cutler-Hammer sales ofﬁce.

Not Seismic Qualiﬁed.

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

Hp kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

575 ∆ Volts to 460Y/266 Volts

5

7.5

10

15

7.5

11

14

20

1@+5%

1@-5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

152

230

635

765

511

358

69

104

FR909

FR910A

286H

WS31

350.

MD075E95

MD11E95

MD14E95

MD20E95

1,400.

1,450.

1,550.

1,920.

20

25

30

27

34

40

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286H

WS31

350.

MD27E95

MD34E95

MD40E95

2,195.

2,430.

2,800.

40

50

60

51

63

75

1@+5%

1@-5%

DT-3

150

39-3/8

26-1/8

19-1/8

480

1000

663

485

217

FR914B

286H

WS33

350.

MD51E95

MD63E95

MD75E95

3,165.

3,580.

3,875.

75

100

125

93

118

145

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

600

760

1000

1171

663

712

485

585

272

344

FR915B

FR916A

286H

WS33

WS19

350.

MD93E95

MD118E95

MD145E95

4,650.

5,440.

6,350.

150

200

250

175

220

275

1@+5%

1@-5%

DT-3

150

56

62-1/4

31-1/4

24-1/4

30-1/4

1100

1200

1600

1422

1581

793

794

616

768

499

728

FR917

FR918A

286H

WS34

800.

MD175E95

MD220E95

MD275E95

8,030.

9,300.

10,880.

300

400

500

330

440

550

1@+5%

1@-5%

DT-3

150

75

44

36

2200

2900

1905

1130

914

1000

1315

FR919

FR920

318F

WS35

1,360.

MD330E95

MD440E95

MD550E95

12,925.

18,900.

22,800.

600

700

800

660

770

880

1@+5%

1@-5%

DT-3

150

75



44-1/2



36



2900



1905



1130



914



1315



FR920



318F



WS35



1,360.

—

MD660E95

MD770E95

MD880E95 

27,600.

34,400.

39,300.

—

1000

1250

1500

1@+5%

1@-5%

DT-3

150



—

MD1000E95 

MD1250E95 

MD1500E95 

42,570.

49,500.

78,600.

575 ∆ Volts to 575Y/332 Volts

5

7.5

10

7.5

11

14

1@+5%

1@-5%

DT-3

150

25

20-1/8

14-1/8

152

635

511

358

69

FR909

286H

WS31

350.

MD075E96

MD11E96

MD14E96

1,400.

1,450.

1,550.

15

20

25

20

27

34

1@+5%

1@-5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

358

104

140

FR910A

FR912A

286H

WS31

350.

MD20E96

MD27E96

MD34E96

1,920.

2,195.

2,430.

30

40

50

40

51

63

1@+5%

1@-5%

DT-3

150

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

310

480

765

1000

511

663

358

485

140

217

FR912A

FR914B

286H

WS31

WS33

350.

MD40E96

MD51E96

MD63E96

2,800.

3,165.

3,580.

60

75

100

75

93

118

1@+5%

1@-5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

480

600

760

1000

1171

663

712

485

585

217

272

344

FR914B

FR915B

FR916A

286H

WS33

WS19

350.

MD75E96

MD93E96

MD118E96

3,875.

4,650.

5,440.

125

150

200

145

175

220

1@+5%

1@-5%

DT-3

150

46-1/8

56

28

31-1/4

23

24-1/4

760

1100

1200

1171

1422

712

793

585

616

344

499

FR916A

FR917

286H

WS19

WS34

350.

800.

MD145E96

MD175E96

MD220E96

6,350.

8,030.

9,300.

250

300

400

275

330

440

1@+5%

1@-5%

DT-3

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

286H



WS34

WS35

800.

1,360.

MD275E96

MD330E96 

MD440E96 

10,880.

12,925.

18,900.

500

600

700

550

660

770

1@+5%

1@-5%

DT-3

150

75



44-1/4



36



2900



1905



1130



914



1315



FR920



WS35



1,360.

—

MD550E96 

MD660E96 

MD770E96 

22,800.

27,600.

34,400.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-57

Transformers

9

Mini-Power Centers

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 Trans-

former, and a secondary distribution

loadcenter with main breaker. Inter-

connecting 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 seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution 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

being damaged provided that a con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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 transform-

ers are designed to meet NEMA ST-20

sound levels listed here. These are the

sound levels measured in a soundproof

environment. Actual sound levels mea-

sured at an installation will likely be higher

due to electrical connections and environ-

mental 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

The Cutler-Hammer business recom-

mends external cables be rated 90°C

(sized at 75°C ampacity) for encapsu-

lated 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

9-58

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Mini-Power Centers

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

Table 9-64. Three-Phase — Mini-Power Centers

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.

kVA Full

Cap.

Taps

FCBN

Dimensions (Inches) Wt.

Lbs.

Dimensions

(mm)

Wt.

kg

Frame Wiring

Diagram

Number

Main Circuit Breaker Feeder

Breakers

Max. Number

Max.

Amp

Style

Number

Price

U.S. $

HWDHWD Primary Secondary

1-Pole 2-Pole

480 Volts to 120/240 Volts

3

5

7.5

2@-5%

27-1/2

29-1/2

12-9/16

9-3/4

105

110

125

698

749

319

248

47

50

56

FR283

FR284

97A3K

110A5K

109A7K

EHD2015

EHD2020

EHD2030

BR215

BR225

BR230

8

12

4

6

12

20

30

P48G11S03P

P48G11S05P

P48G11S07P

2,100.

2,940.

3,540.

10

15

25

2@-5%

38-1/8

43-7/8

13-1/2

16-3/8

11-7/8

14-5/8

180

215

373

968

1115

342

417

301

372

82

98

169

FR285

FR286

FR287

108A10K

107A15K

106A25K

EHD2040

EHD2060

EHD2100

BR250

BR270

BR2125

12

20

26

6

10

13

40

60

100

P48G11S10P

P48G11S15P

P48G11S25P

3,720.

5,000.

7,240.

600 Volts to 120/240 Volts

5

7.5

10

2@-5%

29-1/2

38-1/8

12-9/16

13-1/2

9-3/4

11-7/8

110

125

180

749

968

319

342

248

301

50

56

82

FR284

FR285

110B5K

109B7K

108B10K

FDB2015

FDB2030

FDB2040

BR225

BR230

BR250

12

6

20

30

40

P60G11S05P

P60G11S07P

P60G11S10P

3,785.

4,040.

4,240.

15

25

2@-5%

38-1/8

43-7/8

13-1/2

16-3/8

11-7/8

14-5/8

215

373

968

1115

342

417

301

372

98

169

FR286

FR287

107B15K

106B25K

FDB2060

FDB2100

BR270

BR2125

20

26

10

13

60

100

P60G11S15P

P60G11S25P

5,640.

8,310.

kVA Full

Cap.

Taps

FCBN

Dimensions (Inches) Wt.

Lbs.

Dimensions

(mm)

Wt.

kg

Frame Wiring

Diagram

Number

Main Circuit Breaker



Feeder

Breakers 

Max. Number

Max.

Amp

Style

Number

Price

U.S. $

HWDHWD Primary Secondary

1-Pole 2-Pole

480 ∆ Volts to 208Y/120 Volts

15

22.5

30

2@-5%

36-1/8

40-7/8

41-7/8

28-3/4

29-7/8

9-3/8

13-5/8

320

565

635

917

1038

1063

730

759

238

346

145

256

288

FR289A

FR290A

FR291A

105A15K

103A21K

104A30K

EHD3040

EHD3070

EHD3090

BR350

BR370

BR3100

18

24

6

8

40

60

80

P48G28T15P

P48G28T21P

P48G28T30P

7,420.

9,225.

11,750.

600 ∆ Volts to 208Y/120 Volts

15

22.5

30

2@-5%

36-1/8

40-7/8

41-7/8

28-3/4

29-7/8

9-3/8

13-5/8

320

565

635

917

1038

1063

730

759

238

346

145

256

288

FR289A

FR290A

FR291A

105D15K

103B21K

104B30K

FDB3030

FDB3050

FDB3070

BR350

BR370

BR3100

18

24

6

8

40

60

80

P60G28T15P

P60G28T21P

P60G28T30P

8,685.

10,860.

15,150.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-59

Transformers

9

Totally Enclosed Non-Ventilated Transformers

Single- and Three-Phase

Vol. 1, Ref. No. [0359]

Single- and Three-Phase,

Types DS-3E, DT-3E, 60 Hz

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 dry-

type transformers are for special appli-

cations, where because of adverse

atmospheric conditions it is desirable

to use a dry-type non-ventilated trans-

former 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 ventila-

tion 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. Conse-

quently, 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.

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

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 seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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, non-

ventilated 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 trans-

formers 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 recom-

mends 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 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 “/” designa-

tion, 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

9-60

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Totally Enclosed Non-Ventilated Transformers

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 

Table 9-67. Three-Phase Selection Information — Type DT-3E, 60 Hz 

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.

kVA Type °C

Temp.

Rise

Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Wiring

Diagram

Number

Style

Number

Price

U.S. $

HWD HWD

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

150

42-1/8

24

23-3/8

600

720

1070

610

594

274

329

FR820N

3XA

T20P11S37NV

T20P11S50NV

4,330.

5,400.

kVA Type °C

Temp.

Rise

Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Wiring

Diagram

Number

Style

Number

Price

U.S. $

HWD H WD

480 ∆ Volts to 208Y/120 Volts +2 – 2.5% FCAN, 4 – 2.5% FCBN Taps

30

45

75

DT-3E

150

39-1/4

46-1/2

26-1/8

28

19-1/8

23

480

600

760

995

1171

663

712

486

585

217

272

344

FR914AN

FR915AN

FR916AN

280B

V48M28T30NV

V48M28T45NV

V48M28T75NV

3,080.

4,400.

5,500.

112.5

150

225

300

DT-3E

150

56

75

31-1/4

44-1/2

24-1/2

36

1100

1300

2400

2900

1422

1905

793

1130

622

914

499

589

1088

1315

FR917N

FR918AN

FR919N

FR920N

280B

275A

V48M28T12NV

V48M28T49NV

V48M28T22NV

V48M28T33NV

8,000.

10,100.

16,000.

26,000.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-61

Transformers

9

Class I, Division 2, Groups C and D Transformers

Single- and Three-Phase

Vol. 1, Ref. No. [0361]

Single- and Three-Phase,

Types EPZ, EPTZ, 60 Hz

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 proce-

dures 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 sys-

tems 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.

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.

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 distribu-

tion 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 seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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 gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

9-62

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Class I, Division 2, Groups C and D Transformers

Single- and Three-Phase Vol. 1, Ref. No. [0362]

Winding Terminations

Lugs are not supplied with these trans-

formers. Eaton’s Cutler-Hammer busi-

ness recommends external cables be

rated 90°C (sized at 75°C ampacity) for

encapsulated designs and 75°C for ven-

tilated designs.

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.

Series-Multiple Windings

Series-multiple windings consist of 2

similar coils in each winding which can

be connected in series or parallel (multi-

ple). 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 desig-

nated 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 9-69. Single-Phase Selection Information — Type EPZ, 60 Hz

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Style

Number

Price

U.S. $

FCAN FCBN H W D H W D

480 Volts to 120/240 Volts

.05

.75

1

—

EPZ

115

6-1/2

8-3/8

4-7/8

6

4-5/8

5-3/4

13

21

31

165

213

124

152

118

146

6

10

14

FR57H

FR58AH

FR59AH

524H

Z48N11S51A

Z48N11S76A

Z48N11S01A

510.

675.

805.

1.5

2

3

—

EPZ

115

10-3/4

14-1/8

6-3/16

7-3/4

6-1/8

8

40

65

273

359

157

197

156

203

18

30

FR67H

FR68H

FR176H

524H

Z48N11S16A

Z48N11S02A

Z48N11S03A

975.

1,185.

1,370.

5

7.5

10

—

EPZ

115

16

19

10-3/8

13-3/8

9-7/8

10-1/2

113

123

193

406

483

264

340

232

267

51

56

88

FR177H

FR178H

FR179H

524H

Z48N11S05A

Z48N11S07A

Z48N11S10A

1,985.

2,375.

2,870.

15

25

—

EPZ

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

Z48N11S15A

Z48N11S25A

3,530.

5,190.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Style

Number

Price

U.S. $

FCAN FCBN H W D H W D

480 ∆ Volts to 208Y/120 Volts Three-Phase

3

6

9

15

—

2@-5%

EPTZ

115

13-3/8

15-7/8

17-3/8

16

16-1/2

19-11/16

8-3/8

9-7/8

10-7/16

116

143

166

275

340

403

442

405

419

500

211

251

265

53

65

75

125

FR201H

FR200H

FR103H

FR95H

70A

Z48G28T03A

Z48G28T06A

Z48G28T09A

Z48G28T15A

2,645.

3,085.

3,825.

5,470.

30

45

75

—

2@-5%

EPTZ

115

26-5/8

26-1/2

30-3/4

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

FR243H

FR244H

FR245H

66A

Z48G28T30A

Z48G28T45A

Z48G28T75A

9,720.

11,130.

14,490.

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

6

9

15

—

2@-5%

EPTZ

115

13-1/8

14-15/16

21-3/4

19-9/16

21-7/8

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

Z48G22T06A

Z48G22T09A

Z48G22T15A

3,395.

4,205.

6,010.

30

45

—

2@-5%

EPTZ

115

26-5/8

26-1/2

25-1/4

28-1/2

12-3/4

14-5/8

422

660

676

673

638

724

324

372

191

299

FR243H

FR244H

95A

Z48G22T30A

Z48G22T45A

10,690.

12,230.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-63

Transformers

9

Open Type Core and Coil Assembly Transformers

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 distribu-

tion 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 dry-

type distribution transformers are seis-

mically qualiﬁed, and exceed require-

ments 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 distri-

bution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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 transform-

ers are designed to meet NEMA ST-20

sound levels listed here. These are the

sound levels measured in a soundproof

environment. Actual sound levels mea-

sured at an installation will likely be higher

due to electrical connections and environ-

mental 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

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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.

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



November 2003

9-64

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Open Type Core and Coil Assembly Transformers

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

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

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.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Style

Number

Price

U.S. $

FCAN FCBN H W D H W D

240 x 480 Volts to 120/240 Volts

15

25

37.5

50



DS-3C

150

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

147

212

306

340

768

793

953

428

574

402

445

495

67

96

139

154

FR815C

FR816C

FR817C

FR818C

3XA

T20P11S15ZZ

T20P11S25ZZ

T20P11S37ZZ

T20P11S50ZZ

1,440.

1,870.

2,290.

2,780.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Style

Number

Price

U.S. $

FCAN FCBN H W D H W D

480 ∆ Volts to 208Y/120 Volts

15

30

45

2@+2.5%

4@-2.5%

DT-3C

150

20-5/16

23-13/16

24-3/4

20-1/8

14

128

195

250

516

605

629

511

356

58

89

114

FR909C

FR910C

FR912C

280B

V48M28T15ZZ

V48M28T30ZZ

V48M28T45ZZ

1,350.

1,725.

2,100.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3C

150

29-3/8

31-3/8

41-7/16

25-5/16

19

20

395

530

656

746

797

1052

643

483

508

180

241

298

FR914C

FR915C

FR916C

280B

V48M28T75ZZ

V48M28T12ZZ

V48M28T49ZZ

2,970.

4,300.

5,400.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-65

Transformers

9

Filtered Noise Isolation Transformers

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

■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.

Options and Accessories

Please refer to Page 9-120.

Product Speciﬁcations

Frequency

Cutler-Hammer standard dry-type dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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.

Sound Levels

All Cutler-Hammer 600 volt class general

purpose dry-type distribution transform-

ers are designed to meet NEMA ST-20

sound levels listed here. These are the

sound levels measured in a soundproof

environment. Actual sound levels mea-

sured at an installation will likely be higher

due to electrical connections and environ-

mental 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

Applies to general purpose ventilated

transformers only.

Winding Terminations

Primary and secondary windings are ter-

minated in the wiring compartment. Ven-

tilated transformers have leads brought

out to aluminum pads that are pre-drilled

to accept Cu/Al lugs. Lugs are not sup-

plied with these transformers. The

Cutler-Hammer business recommends

external cables be rated 75°C for venti-

lated 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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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.

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



November 2003

9-66

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Filtered Noise Isolation Transformers

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 

Not Seismic Qualiﬁed.

kVA Full Cap. Taps °C

Temp.

Rise

Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Style

Number

Price

U.S. $

FCAN FCBN H W D H W D

480 ∆ Volts to 208Y/120 Volts

15

30

45

75

2@+2.5%

4@-2.5%

150

27-3/8

32-1/4

35-3/4

19

24

32

16-9/16

18-1/16

23-11/16

210

320

385

555

695

819

908

483

610

813

421

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%

4@-2.5%

150

40

46

48

32

35

38-1/2

23-11/16

28-15/16

720

880

1120

1016

1168

1219

813

889

978

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%

2@-5%

150

27-3/8

32-1/4

35-3/4

19

24

32

16-9/16

18-1/16

23-11/16

210

320

385

555

695

819

908

483

610

813

421

459

602

95

145

175

252

F29R28T15A

F29R28T30A

F29R28T45A

F29R28T75A

6,520.

8,800.

10,200.

13,400.

112.5

150

225

1@+5%

2@-5%

150

40

46

48

32

35

38-1/2

23-11/16

28-15/16

720

880

1120

1016

1168

1219

813

889

978

602

735

327

400

509

F29R28T12A

F29R28T49A

F29R28T22A

15,850.

23,500.

26,790.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-67

Transformers

9

Low Sound Transformers

Single- and Three-Phase

Vol. 1, Ref. No. [0367]

Single- and Three-Phase, 60 Hz

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).

Application Description

Low sound transformers are designed

to have average sound levels 3 dB

below NEMA ST-20 standards.

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.

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.

Seismically Qualiﬁed

Cutler-Hammer manufactured dry-type

distribution transformers are seismi-

cally qualiﬁed, and exceed require-

ments 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 dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

9-68

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Low Sound Transformers

Single- and Three-Phase Vol. 1, Ref. No. [0368]

Sound Levels

All Eaton’s Cutler-Hammer 600 volt

class general purpose dry-type distri-

bution transformers are designed to

meet NEMA ST-20 sound levels listed

here. These are the sound levels mea-

sured in a soundproof environment.

Actual sound levels measured at an

installation will likely be higher due to

electrical connections and environ-

mental 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 9-79. Average Sound Levels

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 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 con-

nected for 120 (parallel), or 240

(series), or 240 with a 120 mid-point.

Technical Data

and Speciﬁcations

Please refer to Page 9-122.

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-69

Transformers

9

Low Sound Transformers

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

Note: Contact Cutler-Hammer for availability of lower sound level designs.

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

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Wt.

Lbs.

Dimensions (mm) Wt.

kg

Frame Wiring

Diagram

Number

Weathershield Style

Number

Price

U.S. $

FCAN FCBN H W D H W D Catalog

Number

Price

U.S. $

480 ∆ Volts to 208Y/120 Volts — Aluminum Windings

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

30-1/8

20-1/8

14-1/8

230

310

765

511

359

69

141

FR910A

FR912A

280B

WS31

350.

V48M28T15LS42

V48M28T30LS42

V48M28T45LS42

1,590.

2,050.

2,520.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

345

499

FR915B

FR916A

FR917

280B

WS33

WS19

WS34

350.

800.

V48M28T75LS47

V48M28T12LS47

V48M28T49LS47

3,530.

5,075.

6,370.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

1422

1581

1905

794

1130

616

768

914

499

728

1089

FR917

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M28T22LS52

V48M28T33LS52

V48M28T55LS57

9,325.

11,800.

18,900.

15

30

45

2@+2.5%

4@-2.5%

DT-3

115

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

69

141

218

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M28F15LS42

V48M28F30LS42

V48M28F45LS42

1,890.

2,330.

2,840.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

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

345

499

FR915B

FR916A

FR917

280B

WS33

WS19

WS34

350.

800.

V48M28F75LS47

V48M28F12LS47

V48M28F49LS47

4,010.

5,805.

7,290.

225

300

500

2@+2.5%

4@-2.5%

DT-3

115

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

1581

1905

794

1130

768

914

728

1089

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M28F22LS52

V48M28F33LS52

V48M28F55LS57

10,660.

13,700.

21,700.

15

30

45

2@+2.5%

4@-2.5%

DT-3

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

765

1000

511

664

359

486

104

141

218

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M28B15LS42

V48M28B30LS42

V48M28B45LS42

2,160.

2,680.

3,360.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

80

46-1/8

56

28

31-1/4

23

24-1/4

760

1100

1171

1422

712

794

585

616

345

499

FR916A

FR917

280B

WS19

WS34

350.

800.

V48M28B75LS47

V48M28B12LS47

V48M28B49LS47

4,610.

6,660.

8,370.

225

300

2@+2.5%

4@-2.5%

DT-3

80

62-1/4

75

31-1/4

44-1/2

30-1/4

36

1600

2400

1581

1905

794

1130

768

914

728

1089

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M28B22LS52

V48M28B33LS52

12,245.

16,000.

480 ∆ Volts to 208Y/120 Volts — Copper Windings

15

30

45

2@+2.5%

4@-2.5%

DT-3

150

25

30-1/8

20-1/8

14-1/8

172

300

370

635

765

511

359

78

136

168

FR909

FR910A

FR912A

280B

WS31

350.

V48M28T15CULS42

V48M28T30CULS42

V48M28T45CULS42

3,000.

2,770.

3,360.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

150

39-3/8

46-1/8

26-1/8

28

19-1/8

23

550

675

850

1000

1171

664

712

486

585

250

361

386

FR914B

FR915B

FR916A

280B

WS33

WS19

350.

V48M28T75CULS47

V48M28T12CULS47

V48M28T49CULS47

5,050.

6,900.

9,510.

225

300

500

2@+2.5%

4@-2.5%

DT-3

150

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1200

2150

3100

1422

1581

1905

794

1130

616

768

914

545

977

1409

FR917

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M28T22CULS52

V48M28T33CULS52

V48M28T55CULS57

12,690.

16,000.

25,800.

15

30

45

2@+2.5%

4@-2.5%

DT-3

115

25

30-1/8

20-1/8

14-1/8

172

300

370

635

765

511

359

78

136

168

FR909

FR910A

FR912A

280B

WS31

350.

V48M28F15CULS42

V48M28F30CULS42

V48M28F45CULS42

2,600.

3,150.

3,800.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

115

39-3/8

46-1/8

26-1/8

28

19-1/8

23

550

675

850

1000

1171

664

712

486

585

250

361

386

FR914B

FR915B

FR916A

280B

WS33

WS19

350.

V48M28F75CULS47

V48M28F12CULS47

V48M28F49CULS47

5,750.

7,860.

10,700.

225

300

500

2@+2.5%

4@-2.5%

DT-3

115

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1200

2150

3100

1422

1581

1905

794

1130

616

768

914

545

977

1409

FR917

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M28F22CULS52

V48M28F33CULS52

V48M28F55CULS57

14,340.

18,000.

29,300.

15

30

45

2@+2.5%

4@-2.5%

DT-3

80

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

300

370

550

765

1000

511

664

359

486

136

168

250

FR910A

FR912A

FR914B

280B

WS31

WS33

350.

V48M28B15CULS42

V48M28B30CULS42

V48M28B45CULS42

3,000.

3,280.

4,370.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3

80

46-1/8

56

28

31-1/4

23

24-1/4

850

1200

1171

1422

712

794

585

616

386

545

FR916A

FR917

280B

WS19

WS34

350.

800.

V48M28B75CULS47

V48M28B12CULS47

V48M28B49CULS47

6,630.

9,090.

12,400.

225

300

2@+2.5%

4@-2.5%

DT-3

80

62-1/4

75

31-1/4

44-1/2

30-1/4

36

2150

3100

1581

1905

794

1130

768

914

728

1409

FR918A

FR919

280B

275A

WS34

WS35

800.

1,360.

V48M28B22CULS52

V48M28B33CULS52

16,650.

20,950.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-70

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Marine Duty Transformers

Single- and Three-Phase Vol. 1, Ref. No. [0370]

Single- and Three-Phase,

Types EPM, DS-3M, EPTM,

DT-3M, 60 Hz

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.

■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 com-

mercial, institutional, industrial, and

residential structures.

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.

Options and Accessories

Please refer to Page 9-120.

Product Speciﬁcations

Frequency

Cutler-Hammer standard dry-type dis-

tribution 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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature rise with nameplate loading.

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-81. 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.

Enclosures

Cutler-Hammer ventilated transformers,

Types DS-3M, DT-3M, utilize a NEMA 2

rated (drip-proof) enclosure as stan-

dard, and are rated NEMA 3R with the

addition of weathershields. Cutler-

Hammer encapsulated transformers,

Types EPM, EPTM, utilize a NEMA 3R

rated enclosure.

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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 9-82. Average Sound Levels

Applies to general purpose ventilated

transformers only.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-71

Transformers

9

Marine Duty Transformers

Single- and Three-Phase

Vol. 1, Ref. No. [0371]

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 transform-

ers. 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

Series-multiple windings consist of 2

similar coils in each winding which can

be connected in series or parallel (multi-

ple). 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 desig-

nated 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

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

Not seismic qualiﬁed.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Style

Number

Price

U.S. $

FCAN FCBN Height Width Depth Height Width Depth

240 x 480 Volts to 120/240 Volts

3

5

7.5

—

EPM

115

14-3/4

15

23

7

8

12-1/2

7

7-1/2

8

70

100

170

375

381

584

178

203

318

178

191

203

32

45

77

Q20N11S03CU

Q20N11S05CU

Q20N11S07CU

1,320.

1,450.

1,880.

10

15

25

—



—



EPM

DS-3M

115

23

31

12-1/2

13

16

8

14

19

180

170

270

584

787

318

330

406

203

356

483

82

77

122

Q20N11S10CU

Q20N11S15CU

R20P11F25CU

2,280.

2,780.

3,580.

37.5

50

75



DS-3M

115

35

39

19-1/2

24

21

25

420

490

650

889

991

495

610

533

635

191

222

295

R20P11F37CU

R20P11F50CU

R20P11F75CU

4,570.

5,360.

6,860.

100

167



DS-3M

115

50

32

28-1/2

920

1160

1270

813

724

417

526

R20P11F99CU

R20P11F67CU

9,130.

14,900.

kVA Full Cap. Taps Type °C

Temp.

Rise

Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Style

Number

Price

U.S. $

FCAN FCBN H W D H W D

480 ∆ Volts to 208Y/120 Volts

3

6

9

2@+2.5%

2@-2.5%

EPTM

115

16-1/2

19

21-1/2

12-1/2

16-1/2

17-7/16

6

7

100

190

275

419

483

546

318

419

443

152

178

45

86

125

L48D28T03CU

L48D28T06CU

L48D28T09CU

2,230.

2,510.

2,720.

15

30

45

2@+2.5%

4@-2.5%

DT-3M

115

22

29

16-3/4

21-1/2

15

19-1/2

190

305

405

559

737

425

546

381

495

86

138

184

M48M28F15CU

M48M28F30CU

M48M28F45CU

3,085.

3,950.

5,350.

75

112.5

150

2@+2.5%

4@-2.5%

DT-3M

115

38

41

26

32

21

25-1/2

650

850

1020

965

1041

660

813

533

648

295

386

463

M48M28F75CU

M48M28F12CU

M48M28F49CU

7,010.

8,500.

10,850.

225

300

500

2@+2.5%

4@-2.5%

2@-2.5%

DT-3M

115

51-1/2

59

39-1/2

48-1/2

34

38

1450

1680

2550

1308

1499

1003

1232

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%

4@-2.5%

EPTM

DT-3M

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%

4@-2.5%

DT-3M

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%

4@-2.5%

2@-2.5%

DT-3M

115

41

51-1/2

59

32

39-1/2

48-1/2

25-1/2

34

38

1020

1450

1680

2550

1041

1308

1499

813

1003

1232

648

864

965

463

658

762

1157

M48M24F49CU

M48M24F22CU

M48D24F33CU

M48D24F55CU

10,850.

14,890.

19,200.

32,775.

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



November 2003

9-72

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

Single- and Three-Phase Vol. 1, Ref. No. [0372]

Single- and Three-Phase

Applications, 60 Hz

Type EP

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 oper-

ation 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 pri-

marily 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.

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

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 seismi-

cally qualiﬁed, and exceed require-

ments 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 transform-

ers are designed for 60 Hz operation.

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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature rise with nameplate loading.

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-85. 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.

Enclosures

Cutler-Hammer encapsulated buck-

boost transformers utilize a NEMA 3R

rated enclosure.

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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

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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-73

Transformers

9

Buck-Boost Transformers

Single- and Three-Phase

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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 stan-

dard two-winding transformer must be used.

The following formulas can be used to

calculate speciﬁc requirements.

For Single-Phase:

For Three-Phase:

Product Selection

For quick selection data, refer to the

tables on the following pages.

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 equip-

ment to be operated — Eaton’s Cutler-

Hammer 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, intercon-

nections 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.

5-Step Selector

The tables which follow will simplify

the selection of the buck-boost trans-

formers. There are no calculations

needed; simply follow these 5 steps.

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 volt-

age. 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 rat-

ing 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 quan-

tity of transformers for your appli-

cation. In this case, you will need

one (1) catalog number

S10N06A01N.

5. Connect the buck-boost trans-

former(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.

LOAD kVA

Load Voltage x

Full Line Amperes

1000

---------------------------------------------=

LOAD kVA

Line Load Voltage x 1.73 x

Full Load Amperes

1000

------------------------------------------------------------------=



November 2003

9-74

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

Single- and Three-Phase Vol. 1, Ref. No. [0374]

Wiring Diagrams

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.

H4 H3

H1H2

H4 H3

H1H2

Neutral

H4 H3

H1H2

High Voltage

Low Voltage

X2 X4 X2 X4 X2 X4

X1 X3 X1 X3 X1 X3

Low Voltage Neutral

High Voltage

X3 X4

X1 X2

X3 X4

X1 X2

X3 X4

X1 X2

H3 H1 H3 H1 H3 H1

H2 H4 H2 H4 H2H4

X1

H4 H3

H1H2

H4 H3

H1H2

Neutral

H4 H3

H1H2

X3 X1 X3 X1 X3

Low Voltage

High Voltage

X2 X4 X2 X4 X2 X4

Low Voltage Neutral

High Voltage

X3 X4

X1 X2

H4 H3

H1H2

X3 X4

X1 X2

H4 H3

H1H2

X3 X4

X1 X2

H4 H3

H1H2

X1

Neutral

X2

X3

X4

X1

X2

X3

X4

X1

X2

X3

X4

Low Voltage

High Voltage

H3

H2

H1

H4

H3

H2

H1

H4

H3

H2

H1

H4

High Voltage

Low Voltage

H4 H3 H2 H1 H1 H2 H3 H4

X1 X2 X3 X4 X4 X3 X2 X1

High Voltage

X3 X4

X2X1

H1

H2

Low Voltage

High Voltage

X3 X4

X2X1

H1H2H4 H3

Low Voltage

High Voltage

X3 X4X2X1

H4 H3

H1H2

Low Voltage

High Voltage

X3 X4

X2X1

H4 H3

H1H2

Low Voltage

X3 X4X2X1

H4 H3

H1H2

High Voltage

Low Voltage

X3 X4X2X1

H1H2H4 H3

High Voltage

Neutral

X2 X4 X2 X4 X2 X4

High Voltage

Low Voltage

H3 H1 H3 H1 H3 H1

H2 H4 H2 H4 H2H4

X1 X3 X1 X3 X1 X3

Low Voltage

X3 X4

X1 X2

H4 H3

H1H2

X3 X4

X1 X2

H4 H3

H1H2

X3 X4

X1 X2

H4 H3

H1H2

Neutral

High Voltage

X3 X4

X2X1

H1

H4

Low Voltage

X3 X4

X2X1

H4 H3

H1H2

High Voltage

Low Voltage

High Voltage

H4 H3 H2 H1 H1 H2 H3 H4

X4 X3 X2 X1X1 X2 X3 X4

Low Voltage

High Voltage

X3 X4X2X1

H1H2H4 H3

High Voltage

Low Voltage

X4 X3

X1X2

X3 X4

X2X1

H4 H3 H2 H1 H1 H2 H3 H4

High Voltage

Low Voltage

H4 H1 H1 H4

X4 X3

X1X2

X3 X4

X2X1

X4 X3

X3 X4

High Voltage

Low Voltage

H2 H1 H1 H2

X1

X2

X2X1

Diagram A Diagram B Diagram C

Diagram D Diagram E Diagram F

Diagram G Diagram H Diagram I

Diagram J Diagram K Diagram L

Diagram M Diagram N Diagram O 

Diagram P Diagram Q Diagram R 

Diagram S Diagram T Diagram U



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-75

Transformers

9

Buck-Boost Transformers

Single- and Three-Phase

Vol. 1, Ref. No. [0375]

Table 9-87. Selection Information

kVA °C Temp.

Rise

Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

120 x 240 Volts to 12/24 Volts

.05

.10

.15

115

6-1/2

3-7/8

3-1/2

7

8

165

98

89

3

4

FR52

FR54

FR55

S10N04A81N

S10N04A82N

S10N04A83N

100.

105.

115.

.25

.50

.75

115

6-1/2

8-3/8

4-7/8

6

3-7/8

4-5/8

5-3/4

12

13

21

165

213

124

152

98

117

146

5

10

FR56

FR57

FR58A

S10N04A26N

S10N04A51N

S10N04A76N

150.

175.

230.

1

1.5

2

115

8-3/8

10-3/4

6

6-3/16

5-3/4

6-1/8

31

40

213

273

152

157

146

156

14

18

FR59A

FR67

FR68

S10N04A01N

S10N04A16N

S10N04A02N

270.

360.

470.

3

5

7.5

115

14-1/8

16

7-11/16

10-3/8

8

9-7/8

65

113

123

359

406

195

263

203

251

29

51

55

FR176

FR177

FR178

S10N04A03N

S10N04A05N

S10N04A07N

635.

1,180.

1,650.

120 x 240 Volts to 16/32 Volts

.05

.10

.15

115

6-1/2

3-7/8

3-1/2

7

8

165

98

89

3

4

FR52

FR54

FR55

S10N06A81N

S10N06A82N

S10N06A83N

100.

105.

115.

.25

.50

.75

115

6-1/2

8-3/8

4-7/8

6

3-7/8

4-5/8

5-3/4

12

13

21

165

213

124

152

98

117

146

5

10

FR56

FR57

FR58A

S10N06A26N

S10N06A51N

S10N06A76N

150.

175.

230.

1

1.5

2

115

8-3/8

10-3/4

6

6-3/16

5-3/4

6-1/8

31

40

213

273

152

157

146

156

14

18

FR59A

FR67

FR68

S10N06A01N

S10N06A16N

S10N06A02N

270.

360.

470.

3

5

7.5

115

14-1/8

16

7-11/16

10-3/8

8

9-7/8

65

113

123

359

406

195

263

203

251

29

51

55

FR176

FR177

FR178

S10N06A03N

S10N06A05N

S10N06A07N

635.

1,180.

1,650.

240 x 480 Volts to 24/48 Volts

.05

.10

.15

115

6-1/2

3-7/8

3-1/2

7

8

165

98

89

3

4

FR52

FR54

FR55

S20N08A81N

S20N08A82N

S20N08A83N

110.

125.

135.

.25

.50

.75

115

6-1/2

8-3/8

4-7/8

6

3-7/8

4-5/8

5-3/4

12

13

21

165

213

124

152

98

117

146

5

10

FR56

FR57

FR58A

S20N08A26N

S20N08A51N

S20N08A76N

165.

210.

270.

1

1.5

2

115

8-3/8

10-3/4

6

6-3/16

5-3/4

6-1/8

31

40

213

273

152

157

146

156

14

18

FR59A

FR67

FR68

S20N08A01N

S20N08A16N

S20N08A02N

310.

420.

570.

3

5

7.5

115

14-1/8

16

7-11/16

10-3/8

8

9-7/8

65

113

123

359

406

195

263

203

251

29

51

55

FR176

FR177

FR178

S20N08A03N

S20N08A05N

S20N08A07N

740.

1,290.

2,000.

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



November 2003

9-76

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

Single-Phase Vol. 1, Ref. No. [0376]

Table 9-88. Single-Phase 115 Volt Output Required, 60 Hz

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

84 91 96 100 102

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.05

.10

—

.13

—

1.14

—

.18

—

1.56

—

.24

—

.48

2.09

—

4.17

—

.31

—

2.70

—

.36

—

3.13

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

1

.10

.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.

1

.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.

175.

1

.50

.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.

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.

360.

1

1.5

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.

1

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.

1,180.

1

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.

Connection Diagram DBBCA

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

105 127 130 138 146

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.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.

105.

1

.10

.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.

1

.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.

175.

1

.50

.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.

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.

360.

1

1.5

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.

1

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.

1,180.

1

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.

Connection Diagram AAABB

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

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-77

Transformers

9

Buck-Boost Transformers

Single-Phase

Vol. 1, Ref. No. [0377]

Table 9-89. Single-Phase 120 Volt Output Required, 60 Hz

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

88 95 100 104 106

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.05

.10

—

.14

—

1.15

—

.19

—

1.56

—

.25

—

.50

2.09

—

4.17

—

.33

—

2.70

—

.38

—

3.13

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

1

.10

.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.

1

.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.

175.

1

.50

.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.

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.

360.

1

1.5

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.

1

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.

1,180.

1

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.

Connection Diagram DB BCA

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

109 132 136 144 152

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.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.

105.

1

.10

.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.

1

.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.

175.

1

.50

.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.

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.

360.

1

1.5

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.

1

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.

1,180.

1

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.

Connection Diagram AAABB

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

9-78

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

Single-Phase Vol. 1, Ref. No. [0378]

Table 9-90. Single-Phase 230 Volt Output Required, 60 Hz

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

199 203 207 209 216

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.05

.10

—

.31

—

1.36

—

.36

—

1.56

—

.43

—

.86

1.88

—

3.75

.48

—

.96

2.08

—

4.17

—

.72

—

3.12

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

1

.10

.15

.62

—

.93

2.71

—

4.06

.72

—

1.08

3.12

—

4.69

—

1.29

—

5.62

—

1.44

—

6.25

—

1.44

—

2.16

6.25

—

9.37

S10N06A82N

S10N04A83N

S10N06A83N

105.

115.

1

.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.

175.

1

.50

.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.

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.

360.

1

1.5

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.

1

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.

1,180.

1

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.

Connection Diagram GF GF E

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

219 242 246 253 260

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.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.

105.

1

.10

.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.

1

.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.

175.

1

.50

.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.

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.

360.

1

1.5

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.

1

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.

1,180.

1

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.

Connection Diagram EE E F F

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

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-79

Transformers

9

Buck-Boost Transformers

Single-Phase

Vol. 1, Ref. No. [0379]

Table 9-91. Single-Phase 240 Volt Output Required, 60 Hz

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

208 212 216 218 225

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.05

.10

—

.32

—

1.35

—

.38

—

1.56

—

.45

—

.9

1.88

—

3.75

.5

—

1.0

2.08

—

4.17

—

.75

—

3.12

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

1

.10

.15

.65

—

.98

2.71

—

4.06

.75

—

1.12

3.12

—

4.69

—

1.35

—

5.62

—

1.5

—

6.25

—

1.5

—

2.25

6.25

—

9.37

S10N06A82N

S10N04A83N

S10N06A83N

105.

115.

1

.25

.50

—

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.

175.

1

.50

.75

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.

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.

360.

1

1.5

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.

1

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.

1,180.

1

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.

Connection Diagram GF GF E

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

229 252 256 264 272

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.05

.10

1.0

—

2.0

4.16

—

8.33

1.05

—

2.1

4.38

—

8.75

—

.8

—

3.33

—

.55

—

1.1

2.29

—

4.58

—

.42

—

1.77

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

1

.10

.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.

1

.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.

175.

1

.50

.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.

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.

360.

1

1.5

2

—

40

—

167

—

42

—

175

—

24

—

32

100

—

133

—

22

—

91.7

—

12.7

—

17

53.1

—

70.8

S10N06A16N

S10N04A02N

S10N06A02N

360.

470.

1

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.

1,180.

1

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.

Connection Diagram EEEFF

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

9-80

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

Three-Phase Vol. 1, Ref. No. [0380]

Table 9-92. Three-Phase Open Delta Connection 230 Volt Output Required, 60 Hz

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

199 203 207 209 216

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

2

.05

.10

—

.54

—

1.35

—

.62

—

1.56

—

.75

—

1.49

1.87

—

3.75

.83

—

1.66

2.08

—

4.17

—

1.24

—

3.12

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

2

.10

.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.

2

.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.

175.

2

.50

.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.

2

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.

360.

2

1.5

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.

2

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.

1,180.

2

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.

Connection Diagram LKLKI

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

219 242 246 253 260

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

2

.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.

105.

2

.10

.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.

2

.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.

175.

2

.50

.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.

2

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.

360.

2

1.5

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.

2

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.

1,180.

2

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.

Connection Diagram IIIKK

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-81

Transformers

9

Buck-Boost Transformers

Three-Phase

Vol. 1, Ref. No. [0381]

Table 9-93. Three-Phase Open Delta Connection 240 Volt Output Required, 60 Hz

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

208 212 216 218 225

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

2

.05

.10

—

.56

—

1.35

—

.65

—

1.56

—

.73

—

1.56

1.87

—

3.75

.87

—

1.73

2.08

—

4.17

—

1.3

—

3.12

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

2

.10

.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.

2

.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.

175.

2

.50

.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.

2

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.

360.

2

1.5

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.

2

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.

1,180.

2

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.

Connection Diagram LKLKI

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

229 252 256 264 272

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

2

.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.

105.

2

.10

.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.

2

.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.

175.

2

.50

.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.

2

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.

360.

2

1.5

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.

2

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.

1,180.

2

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.

Connection Diagram IIIKK

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

9-82

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

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.

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

152 164 173 180 184

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

3

.05

.10

—

.41

—

1.15

—

.56

—

1.56

—

.75

—

1.50

2.08

—

4.17

—

.98

—

2.71

—

1.12

—

3.12

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

3

.10

.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.

3

.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.

175.

3

.50

.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.

3

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.

360.

3

1.5

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.

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.

1,180.

3

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.

Connection Diagram PNNOM

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

189 229 236 250 264

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

3

.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.

105.

3

.10

.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.

3

.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.

175.

3

.50

.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.

3

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.

360.

3

1.5

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.

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.

1,180.

3

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.

Connection Diagram MMMN N

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-83

Transformers

9

Buck-Boost Transformers

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.

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

183 192 199 208 218

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

3

.05

.10

—

.62

—

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.

105.

3

.10

.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.

3

.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.

175.

3

.50

.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.

3

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.

360.

3

1.5

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.

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.

1,180.

3

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.

Connection Diagram NNSMQ

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

242 245 253 260 265

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

3

.05

.10

1.74

—

3.48

4.37

—

8.75

—

1.33

—

3.33

—

.91

—

1.83

2.29

—

4.58

—

.70

—

1.77

—

.62

—

1.56

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

3

.10

.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.

3

.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.

175.

3

.50

.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.

3

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.

360.

3

1.5

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.

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.

1,180.

3

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.

Connection Diagram QQRRS

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

9-84

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

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.

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

190 200 208 218 228

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

3

.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.

105.

3

.10

.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.

3

.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.

175.

3

.50

.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.

3

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.

360.

3

1.5

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.

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.

1,180.

3

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.

Connection Diagram NNMR Q

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

252 256 264 272 277

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

3

.05

.10

1.85

—

3.64

4.37

—

8.75

—

1.39

—

3.33

—

.95

—

1.91

2.29

—

4.58

—

.74

—

1.77

—

.65

—

1.56

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

3

.10

.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.

3

.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.

175.

3

.50

.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.

3

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.

360.

3

1.5

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.

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.

1,180.

3

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.

Connection Diagram QQRRS

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-85

Transformers

9

Buck-Boost Transformers

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.

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage Style

Number

Price

U.S. $

406 418 432 438 424 436 450

Output Output Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

3

.05

.10

—

1.25

—

1.57

—

1.66

—

3.31

2.08

—

4.15

—

2.49

—

3.12

—

3.22

—

6.62

4.04

—

8.31

—

1.3

—

1.7

1.56

—

2.1

—

3.5

—

4.2

—

2.6

—

3.13

—

S10N04A81N

S10N06A81N

S10N04A82N

100.

105.

3

.10

.15

2.49

—

3.73

3.12

—

4.68

—

4.97

—

6.24

—

4.97

—

7.46

6.24

—

9.36

—

9.94

—

12.48

—

2.6

—

3.9

3.12

—

4.68

—

5.2

—

6.25

—

5.2

—

7.8

6.25

—

9.38

S10N06A82N

S10N04A83N

S10N06A83N

105.

115.

3

.25

.50

—

6.22

—

7.81

—

8.28

—

16.6

10.39

—

20.84

—

12.4

—

15.56

—

16.6

—

33.2

20.84

—

41.67

—

6.5

—

7.82

—

8.7

—

17.4

10.4

—

20.9

—

13

—

15.6

—

S10N04A26N

S10N06A26N

S10N04A51N

150.

175.

3

.50

.75

12.5

—

18.7

15.69

—

23.47

—

24.8

—

31.12

—

24.69

—

37.3

31.25

—

46.82

—

49.6

—

62.25

—

13

—

19.5

15.6

—

23.4

—

26

—

31.2

—

26

—

39

31.2

—

46.9

S10N06A51N

S10N04A76N

S10N06A76N

175.

230.

3

1

1.5

—

24.9

—

31.25

—

33.1

—

49.7

41.54

—

62.38

—

49.7

—

62.38

—

66.2

—

99.4

83.09

—

124.75

—

26

—

31.2

—

35

—

52

42

—

62.5

—

52

—

62.5

—

S10N04A01N

S10N06A01N

S10N04A16N

270.

360.

3

1.5

2

37.3

—

49.7

46.94

—

62.38

—

66.3

—

83.22

—

74.6

—

99.5

93.63

—

124.88

—

133

—

166.93

—

39

—

52

46.8

—

62.5

—

69

—

82.9

—

78

—

104

93.8

—

125

S10N06A16N

S10N04A02N

S10N06A02N

360.

470.

3

5

—

74.6

—

93.63

—

99.3

—

166

124.64

—

208.35

—

149

—

187.01

—

198.6

—

322

249.27

—

404.16

—

78

—

93.8

—

104

—

174

125

—

209.2

—

156

—

187.6

—

S10N04A03N

S10N06A03N

S10N04A05N

635.

1,180.

3

5

7.5

125

—

187

156.89

—

235

—

248

—

311

—

249

—

373

312.53

—

468

—

496

—

622

—

130

—

195

156.3

—

234

—

260

—

312

—

260

—

390

312.7

—

469

S10N06A05N

S10N04A07N

S10N06A07N

1,180.

1,650.

Connection

Diagram 

RRQQRRQ

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

9-86

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

Single-Phase Vol. 1, Ref. No. [0386]

Table 9-98. Single-Phase Required, 60 Hz

Additional wiring trough may be required.

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required 

Unit

kVA

Input Available Voltage/Output Voltage Style

Number

Price

U.S. $

200/240 230/277 346/380 362/380 378/416 416/457

Output Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.25

.50

.75

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

1.5

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

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 

BBFEF F

Units

Required 

Unit

kVA

Input Available Voltage/Output Voltage Style

Number

Price

U.S. $

436/480 458/480 277/230 480/456 504/480 528/480

Output Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

1

.25

.50

.75

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

2.75

5.49

8.24

5.72

11.4

17.2

S20N08A26N

S20N08A51N

S20N08A76N

165.

210.

270.

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

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 

FEBEEF

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-87

Transformers

9

Buck-Boost Transformers

Three-Phase

Vol. 1, Ref. No. [0387]

Table 9-99. Three-Phase Required, 60 Hz

Refer to Page 9-74 for Buck-Boost wiring diagrams.

Additional wiring trough may be required.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Unit

kVA

Input Available Voltage/Output Voltage Style

Number

Price

U.S. $

362/380 346/416 430/473 400/480 436/480

Output Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps kVA Amps

.25

.50

.75

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 INKNK

Units Required 23232

Unit

kVA

Input Available Voltage/Output Voltage Style

Number

Price

U.S. $

460/483 457/380 504/480 528/480

Output Output Output Output

kVA Amps kVA Amps kVA Amps kVA Amps

.25

.50

.75

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 INIK

Units Required 2322

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

9-88

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Buck-Boost Transformers

Autotransformer Applications Vol. 1, Ref. No. [0388]

Table 9-100. Three-Phase Open Delta Connection 480 Volt Output

Required, 60 Hz

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.

Table 9-101. Single-Phase 480 Volt Output Required, 60 Hz

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.

Note: Output voltage for lower input voltage can be found by: x Input Actual Voltage = Output New Voltage.

Note: Output kVA available at reduced input voltage can be found by: x Output kVA = New kVA Rating.

Units

Required



Input Available Voltage Style

Number 

Price

U.S.

600 575 575

Output Output Output

kVA Amps kVA Amps kVA Amps

2

4.3

—

6.5

5.1

—

7.8

—

4.1

—

4.9

—

S20N11S51N

S60G11S51N

S20N11S76N

170.

255.

220.

2

—

8.6

—

10.3

—

6.2

—

8.3

7.4

—

9.9

S60G11S76N

S20N11S01N

S60G11S01N

330.

260.

390.

2

13.0

—

17.2

15.6

—

20.6

—

12.4

—

14.9

—

S20N11S16N

S60G11S16N

S20N11S02N

320.

475.

410.

2

—

25.8

—

31

—

16.5

—

24.8

19.8

—

29.8

S60G11S02N

S20N11S03N

S60G11S03N

610.

500.

740.

2

43.2

—

65

51.9

—

78.1

—

41

—

49.3

—

S20N11S05N

S60G11S05N

S20N11S07N

740.

1,110.

980.

2

—

86

—

103.4

—

83

—

99.8

62

—

74.5

—

S60G11S07N

S20N11S10N

S60G11S10N

1,460.

1,180.

1,760.

2

130

—

216

156.3

—

259.8

—

124

—

149.1

—

S20N11S15N

S60N11S15N

T20P11S25

1,540.

2,400.

1,870.

2

—

324

432

—

389.7

519.6

207

—

248.9

—

S60J11S25N

T20P11S37

T20P11S50

2,825.

2,290.

3,220.

Connec-

tion

Diagram



IJT

Units

Required



Input Available Voltage Style

Number 

Price

U.S.

600 575 575

Output Output Output

kVA Amps kVA Amps kVA Amps

1

2.5

—

3.7

5.2

—

7.7

—

2.4

—

5

—

S20N11S51N

S60G11S51N

S20N11S76N

170.

255.

220.

1

—

5.0

—

10.4

—

3.6

—

4.8

7.5

—

10

S60G11S76N

S20N11S01N

S60G11S01N

330.

260.

390.

1

7.5

—

10

15.6

—

20.8

—

7.2

—

15

—

S20N11S16N

S60G11S16N

S20N11S02N

320.

475.

410.

1

—

15

—

31.2

—

9.6

—

14.3

20

—

29.7

S60G11S02N

S20N11S03N

S60G11S03N

610.

500.

740.

1

25

—

37.5

52

—

78.1

—

24

—

50

—

S20N11S05N

S60G11S05N

S20N11S07N

740.

1,110.

980.

1

—

50

—

104.1

—

43

—

100

36

—

75

—

S60G11S07N

S20N11S10N

S60G11S10N

1,460.

1,180.

1,760.

1

75

—

125

156.2

—

260.4

—

72

—

150

—

S20N11S15N

S60N11S15N

T20P11S25

1,540.

2,400.

1,870.

1

—

187

250

—

389.6

520.8

120

—

250

—

S60J11S25N

T20P11S37

T20P11S50

2,825.

2,290.

3,220.

Connec-

tion

Diagram



EHU

Rated Output Voltage

Rated Input Voltage

--------------------------------------------------

Actual Input Voltage

Rated Input Voltage

------------------------------------------------

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-89

Transformers

9

Industrial Control Transformers

Type MTA

Vol. 1, Ref. No. [0389]

Type MTA

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 ground-

ed 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 applica-

tions where compact construction

is demanded.

Features, Beneﬁts

and Functions

■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 distribu-

tion and control transformers by Eaton

Corporation are built and tested in

accordance with applicable NEMA,

ANSI, and IEEE Standards.

Product Speciﬁcations

Frequency

Cutler-Hammer Type MTA control

transformers are designed for 60 Hertz

operation. Transformers required for

other frequencies are available and

must be speciﬁcally designed.

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-102. 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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

9-90

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

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

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

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.

Primary

Voltage

VA Rating

25 50 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

(3-2/10)

2-1/2

(4)

3-1/2

(6-1/4)

5

(8)

455810152025———

120 6/10

(1)

1-1/4

(2)

1-8/10

(3)

2-1/4

(4)

3-1/2

(6-1/4)

5

(8)

455810151520———

200 3/10

(6/10)

3/4

(1-1/4)

1-1/8

(1-8/10)

1-1/2

(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

(1-8/10)

1-4/10

(2-1/4)

2

(3-1/2)

2-8/10

(4-1/2)

3-1/2

(6)

4

(7)

5

(8)

46812152030—

220 3/10

(1/2)

6/10

(1-1/8)

1

(1-6/10)

1-1/4

(2-1/4)

2

(3-2/10)

2-1/2

(4-1/2)

3-2/10

(5-6/10)

4

(6-1/4)

4-1/2

(7-1/2)

46812152030—

230 3/10

(1/2)

6/10

(1)

8/10

(1-6/10)

1-1/4

(2)

1-8/10

(3-2/10)

2-1/2

(4)

3-2/10

(5)

3-1/2

(6-1/4)

4-1/2

(7-1/2)

46810152030—

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

(1-8/10)

1-6/10

(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)

569121525—

380 3/16

(3/10)

3/10

(6/10)

1/2

(8/10)

3/4

(1-1/4)

1-1/8

(1-8/10)

1-1/2

(2-1/2)

1-8/10

(3-2/10)

2-1/4

(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

(1-8/10)

1-1/2

(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

(1-8/10)

1-4/10

(2-1/4)

1-8/10

(3)

2

(3-1/2)

2-1/2

(4)

3-1/2

(6)

5

(9)

468121520

440 15/100

(1/4)

3/10

(1/2)

1/2

(8/10)

6/10

(1-1/8)

1

(1-6/10)

1-1/4

(2-1/4)

1-6/10

(2-8/10)

2

(3-2/10)

2-1/4

(3-1/2)

3-2/10

(5)

5

(8)

468121520

460 15/100

(1/4)

3/10

(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

(3-2/10)

2-1/4

(3-2/10)

3-2/10

(5)

4-1/2

(8)

3-1/2 6 8 12 15 20

480 15/100

(1/4)

3/10

(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

(1-8/10)

1-1/4

(2-1/4)

1-6/10

(2-1/2)

1-8/10

(3)

2-1/2

(4-1/2)

4

(6-1/4)

54-1/2 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

(1-6/10)

1-1/4

(2)

1-1/2

(2-1/2)

1-8/10

(3)

2-1/2

(4)

3

(6-1/4)

54-1/2 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

(1-6/10)

1-1/4

(2)

1-1/2

(2-1/2)

1-6/10

(2-8/10)

2-1/4

(4)

3-1/2

(6-1/4)

54691515

Secondary

Voltage

VA Rating

25 50 75 100 150 200 250 300 350 500 750 1000 1500 2000 3000 5000

12

24

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

8/10

1-1/4

1-8/10

1-6/10

2-1/2

3-1/2

3-2/10

4-1/2

4

5

6-1/4

6

5-6/10

9

8

12

15

30

20

30

—

110

115

120

3/10

3/4

6/10

1-1/8

1

1-1/2

1-4/10

1-1/4

2-1/4

2

3

2-8/10

2-1/2

3-1/2

3-2/10

4-1/2

4

5

4-1/2

7-1/2

7

6-1/4

10

15

20

30

20

—

220

230

240

15/100

3/10

1/2

3/4

6/10

1-1/8

1

1-1/2

1-4/10

1-1/4

1-8/10

1-6/10

2-1/4

2

2-1/2

3-1/2

3-2/10

5-6/10

5

7

9

8

15

12

20

30



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-91

Transformers

9

Industrial Control Transformers

Types MTA, MTC and AP

Vol. 1, Ref. No. [0391]

Wiring Diagrams

Type MTA and MTC Control Transformers

Table 9-105. Wiring for Diagram 1

Figure 9-3. Diagram 1

Table 9-106. Wiring for Diagram 2

Figure 9-4. Diagram 2

Table 9-107. Wiring for Diagram 3

Figure 9-5. Diagram 3

Table 9-108. Wiring for Diagram 4

Figure 9-6. Diagram 4

Type AP Control Transformers

Table 9-109. Wiring for Diagram 5

Figure 9-7. Diagram 5

Volts Connect Lines

AB

460

230

—

H2 to H3

H1 to H3 and H2 to H4

H1-H4

115 — — X1-X2

Volts Connect Lines

AB

575

460

230

—

416

380

—

208

H2 to H3

H1 to H3 and H2 to H4

H1 to H3 and H2 to H5

H1-H5

H1-H4

H1-H5

115

95

115

95

—

X1-X3

X1-X2

H1 H3 H2 H4

X2 X1

H1 H3 H2 H5

X3 X1

H4

X2

Volts Connect Lines

AB

460

230

—

H2 to H3

H1 to H3 and H2 to H4

H1-H4

230

115

—

X2 to X3

X1 to X3 and X2 to X4

X1-X4

Volts Connect Lines

AB

115 115 — H1-H2

12 24 — X1-X2

H1 H3 H2 H4

X4 X2 X3 X1

H1 H2

X2 X1

Volts Connect Lines

AB

480

240

—

H2 to H3

H1 to H3 and H2 to H4

H1-H4

240

115

—

X2 to X3

X1 to X3 and X2 to X4

X1-X4

H1 H3 H2 H4

X4 X2 X3 X1



November 2003

9-92

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTA Vol. 1, Ref. No. [0392]

Product Selection

Additional Product Selection information begins on Page 9-136.

Table 9-110. Type MTA

See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Wiring

Diagram 

Style

Number

Price

U.S.

Height Width Depth Height Width Depth

230/460 Volts to 115 Volts, 60 Hz

50 (Use Type MTC – C0050C2A)

75

100

3-3/16

3-3/4

4

3

4

80

95

102

1.4

1.8

FR1510

FR1512

1

C0075A2F

C0100A2F

74.00

76.50

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4-3/4

4-1/2

5

6

7

8

80

96

95

114

95

114

127

2.7

3.2

3.6

FR1520

FR1714

FR1717

1

C0150A2F

C0200A2F

C0250A2F

88.00

110.00

131.00

300

350

500

3-13/16

4-3/8

4-1/2

5-1/4

5-1/2

6

5-5/8

10

12

15

96

111

114

133

139

152

143

4.5

5.4

6.8

FR1723

FR1727

FR1923

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

27

111

133

152

133

155

174

155

171

190

8.6

12.3

FR1931

FRC613

FRC614

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

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

3-3/4

3-1/4

3-3/4

4

2

3

4

65

80

76

95

82

95

102

.9

1.4

1.8

FR1310

FR1510

FR1512

3

C0050A2G

C0075A2G

C0100A2G

94.00

102.00

110.00

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4-3/4

4-1/2

5

6

7

8

80

96

95

114

95

114

127

2.7

3.2

3.6

FR1520

FR1714

FR1717

3

C0150A2G

C0200A2G

C0250A2G

121.00

137.00

154.00

300

350

500

3-13/16

4-3/8

4-1/2

5-1/4

6

6-1/4

10

12

15

96

111

114

133

152

158

4.5

5.4

6.8

FR1727

FR1930

3

C0300A2G

C0350A2G

C0500A2G

165.00

177.00

210.00

750

1000

1500

5-1/4

6

6-1/8

6-7/8

6-3/4

7-1/2

19

27

133

152

155

174

171

190

8.6

12.3

FRC613

FRC614

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

C2000A2G

C3000A2G

C5000A2G

650.00

865.00

1,390.00

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-93

Transformers

9

Industrial Control Transformers

Type MTA

Vol. 1, Ref. No. [0393]

Table 9-111. Type MTA

See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Wiring

Diagram 

Style

Number

Price

U.S.

Height Width Depth Height Width Depth

230/460/575 Volts to 115/95 Volts, 50/60 Hz

50

75

100

2-19/32

3-3/16

3

3-3/4

4

4 3/4

2

4

5

98

80

76

95

102

120

1.5

1.8

2.7

FR1314

FR1512

FR1517

2A

C0050A3C

C0075A3C

C0100A3C

94.

102.

110.

150

200

250

3-13/16

4-1/2

5

5-1/2

7

8

10

96

114

127

139

3.2

3.6

4.5

FR1714

FR1717

FR1723

2A

C0150A3C

C0200A3C

C0250A3C

121.

137.

169.

300

350

500

3-13/16

4-3/8

4-1/2

5-1/4

6

5-5/8

6-1/8

12

14

17

96

111

114

133

152

143

155

5.4

6.8

8.6

FR1730

FR1923

FR1931

2A

C0300A3C

C0350A3C

C0500A3C

176.

194.

246.

750

1000

1500

4-3/8

6

5-7/8

5-1/4

6-7/8

7-3/4

7-1/2

8-1/2

27

24

34

111

152

149

133

174

196

190

215

12.3

10.9

15.4

FR1943

FRC614

FRC827

2A

C0750A3C

C1000A3C

C1500A3C

280.

568.

753.

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

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

C0050A3B

C0100A3B

C0200A3B

97.

116.

137.

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

3-3/4

4-1/2

3-3/4

4-3/4

4-1/2

5

3

5

7

8

98

80

96

76

95

114

95

120

114

127

1.5

2.3

3.2

3.6

FR1314

FR1516

FR1714

FR1717

2B

C0050A3D

C0100A3D

C0150A3D

C0200A3D

94.

110.

121.

137.

250

300

500

3-13/16

4-3/8

4-1/2

5-1/4

5-1/2

6

6-1/8

10

13

18

96

111

114

133

139

152

155

4.5

5.4

8.6

FR1723

FR1730

FR1931

2B

C0250A3D

C0300A3D

C0500A3D

169.

176.

246.

750

1000

1500

4-3/8

6

5-7/8

5-1/4

6-7/8

7-3/4

7-1/2

8-1/2

27

25

33

111

152

149

133

174

196

190

215

12.3

10.9

15.4

FR1943

FRC614

FRC827

2B

C0750A3D

C1000A3D

C1500A3D

280.

555.

753.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-94

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTC Vol. 1, Ref. No. [0394]

Type MTC

Type MTC Transformers

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 light-

ing grounds; greater safety is afforded

the operator. The control transformer

line is particularly adaptable on appli-

cations where compact construction

is demanded. The MTC line is similar

to the MTA line except it provides

increased regulation.

Features, Beneﬁts

and Functions

■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 distribu-

tion and control transformers by Eaton

Corporation are built and tested in

accordance with applicable NEMA,

ANSI, and IEEE Standards.

Product Speciﬁcations

Frequency

Cutler-Hammer standard dry-type dis-

tribution transformers are designed

for 60 Hz operation. Transformers

required for other frequencies are

available and must be speciﬁcally

designed.

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-112. 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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-95

Transformers

9

Industrial Control Transformers

Type MTC

Vol. 1, Ref. No. [0395]

Product Selection

Additional Product Selection information begins on Page 9-136.

Table 9-113. Type MTC

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)

See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Wiring

Diagram 

Style

Number

Price

U.S.

Height Width Depth Height Width Depth

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

2-7/8

3

3-3/8

3-3/4

4

2

3

66

73

76

86

95

102

.9

1.4

FR1310

FR1314

FR1413

1

C0050C2A

C0075C2A

C0100C2A

67.00

78.50

84.00

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4-3/4

4-1/2

5

6

7

8

81

97

95

114

121

114

127

2.7

3.2

3.6

FR1517

FR1714

FR1717

1

C0150C2A

C0200C2A

C0250C2A

100.00

116.00

144.00

300

350

500

3-13/16

4-3/8

4-1/2

5-1/4

5-3/8

6

6-1/8

10

11

20

97

111

114

133

137

152

156

4.5

5.0

9.1

FR1722

FR1726

FR1931

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

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

C2000C2A

C3000C2A

C5000C2A

676.00

934.00

1,445.00

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Wiring

Diagram 

Style

Number

Price

U.S.

Height Width Depth Height Width Depth

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

4-5/32

4-15/32

3

3-3/8

3-3/4

4

4-3/4

2.2

3.2

6.2

98

106

114

76

86

95

83

95

102

121

1.0

1.5

2.8

FR1310

FR1314

FR1413

FR1517

1

C0050C2AFB

C0075C2AFB

C0100C2AFB

C0150C2AFB

88.00

101.00

106.00

123.00

200

250

300

5-3/32

4-1/2

5

5-3/8

7.2

8.2

10.2

129

114

127

137

3.3

3.7

4.7

FR1714

FR1717

FR1722

1

C0200C2AFB

C0250C2AFB

C0300C2AFB

138.00

166.00

176.00

350

500

750

5-3/32

5-21/32

4-1/2

5-1/4

6

6-1/8

7-3/4

11.2

20.2

28.2

129

144

114

133

152

156

197

5.1

9.2

12.8

FR1726

FR1931

FR1934

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

C1000C2AFB

C1500C2AFB

C2000C2AFB

424.00

585.00

697.00

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



November 2003

9-96

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTE Vol. 1, Ref. No. [0396]

Type MTE

Type MTE Transformers

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 light-

ing grounds; greater safety is afforded

the operator. The control transformer

line is particularly adaptable on appli-

cations where compact construction

is demanded.

Note: The MTG, “open core-coil design”

has been superseded by the epoxy-

encapsulated core-coil design MTE with

no change to dimensions or functionality.

Features, Beneﬁts

and Functions

■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.

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

Primary Fuse Kit

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.

Table 9-115. Primary Fuse Kit

Finger-Safe Terminal Covers (Optional)

■Fits CE marked designs 50 – 750 VA.

■Fits MTE designs.

25 – 750 VA.

Table 9-116. Finger-Safe Terminal Covers

Finger-Safe Terminal Covers — FSK4

Finger-Safe Terminal Covers — FSK6

Finger-Safe Primary Fuse Block Covers

■Fits 2-pole primary fuse blocks on

MTE designs.

Table 9-117. Finger-Safe Primary Fuse

Block Covers

Finger-Safe Primary Fuse Block Covers

Description Catalog

Number

Price

U.S. $

Primary Fuse Kit PFK1 26.

Description Catalog

Number

Price

U.S. $

4 Terminal Transformers

6 Terminal Transformers

FSK4

FSK6

24.

25.

Description Catalog

Number

Price

U.S. $

Primary Fuse Block Covers FSKFB 38.

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-97

Transformers

9

Industrial Control Transformers

Type MTE

Vol. 1, Ref. No. [0397]

Product Speciﬁcations

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-118. 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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

Wiring Diagrams

Figure 9-8. Diagram 1

Figure 9-9. Diagram 2

Figure 9-10. Diagram 3

Figure 9-11. Diagram 4

Figure 9-12. Diagram 5

Figure 9-13. Diagram 6



November 2003

9-98

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTE Vol. 1, Ref. No. [0398]

Wiring Diagrams

Figure 9-14. Diagram 7

Figure 9-15. Diagram 8

Figure 9-16. Diagram 9

Figure 9-17. Diagram 10

Figure 9-18. Diagram 11

Figure 9-19. Diagram 12

Figure 9-20. Diagram 13

Figure 9-21. Diagram 14

Figure 9-22. Diagram 15

Figure 9-23. Diagram 16

H1

H

3

H2

H4

H1

H

3

H2

H4

H1

H

3

H2

H4

X4

X2

X

3

X1

X4

X2

X

3

X1

X4

X2

X

3

X1

24

0

V

480 V

240 V

12

0

V

H1

H2

X2

X1

600

V

5

7

5

V

550

V

24 V

2

3

V

22 V

H1

H2

X2

X1

42

0

V

4

00

V

380

V

24 V

2

3

V

22 V

H1

H2

H

3

H4

H

5

X

3

X2

X1

5

50

,

575

,

600 V

4

40

,

460

,

480 V

380

,

400

,

416 V

2

20

,

230

,

240 V

2

3

/

24

/

25

1

10

,

115

,

120

V

0

V

0

V

X4

X

3

X2

X1

H1

H2

H

3

H4

H

5

H

6

5

7

5

V

460

V

400

V

230

V

208

V

0

V

0

V

24 V

1

5

V

230

V

X4

X

3

X2

X1

H1

H2

H

3

H4

H

5

H

6

5

7

5

V

460

V

400

V

230

V

208

V

0

V

0

V

0

V

1

5

V

1

5

V



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-99

Transformers

9

Industrial Control Transformers

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

See Page 9-97 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

2-7/8

3

3-3/8

2-1/2

3

3-1/2

3-3/8

1.7

2.6

3.5

4.2

65

73

76

86

64

76

89

86

.8

1.2

1.6

1.9

1

C0025E2A

C0050E2A

C0075E2A

C0100E2A

72.00

53.50

64.00

69.00

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4

4-3/8

6.7

8.5

10.0

81

97

95

114

102

111

3.0

3.9

4.5

1

C0150E2A

C0200E2A

C0250E2A

82.00

101.00

117.00

300

350

500

3-13/16

4-3/4

4-1/2

5-1/4

4-3/4

5-1/4

5-1/2

11.3

13.6

19.2

97

121

114

133

121

133

140

5.1

6.2

8.7

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

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

2-7/8

3-3/16

3

3-3/8

3-3/4

3

3-1/2

3-3/8

4

2.7

3.5

4.2

6.7

65

73

81

76

86

95

76

89

86

102

1.2

1.6

1.9

3.0

2

C0050E2B

C0075E2B

C0100E2B

C0150E2B

62.00

73.00

82.00

107.00

200

250

300

3-13/16

4-1/2

4

4-3/8

4-3/4

8.5

10.1

11.4

97

114

102

111

121

3.9

4.6

5.2

2

C0200E2B

C0250E2B

C0300E2B

129.00

147.00

161.00

350

500

750

3-13/16

4-3/4

4-1/2

5-1/4

5-5/8

7

13.4

17.5

28.1

97

121

114

133

143

178

6.1

7.9

12.8

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

2-7/8

3

3-3/8

3

3-1/2

3-3/8

2.6

3.6

4.4

65

73

76

86

76

89

56

1.2

1.6

2.0

3

C0050E1B

C0075E1B

C0100E1B

62.00

72.50

82.00

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4

4-3/8

6.7

8.3

10.1

81

97

95

114

102

111

3.0

3.8

4.6

3

C0150E1B

C0200E1B

C0250E1B

107.00

129.00

147.00

300

350

500

3-13/16

4-3/4

4-1/2

5-1/4

4-3/4

5-1/4

5-5/8

11.2

13.2

17.5

97

121

114

133

121

133

143

5.1

6.0

7.9

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

2-7/8

3-3/16

3

3-3/8

3-3/4

3

3-1/2

3-3/8

4

2.9

3.8

4.5

6.9

65

73

81

76

86

95

76

89

86

102

1.3

1.7

2.0

3.1

4

C0050E3A

C0075E3A

C0100E3A

C0150E3A

60.50

71.50

81.50

104.00

200

250

300

3-13/16

4-1/2

4

4-3/8

4-3/4

8.7

10.2

11.4

97

114

102

111

121

3.9

4.6

5.2

4

C0200E3A

C0250E3A

C0300E3A

127.00

144.00

158.00

350

500

750

3-13/16

4-3/4

4-1/2

5-1/4

5-3/8

7

13.7

17.2

25.7

97

121

114

133

136

178

6.2

7.8

11.7

4

C0350E3A

C0500E3A

C0750E3A

171.00

196.00

263.00

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-100

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTE Vol. 1, Ref. No. [0400]

Table 9-120. Type MTE — Product Selection

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.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

Primary: 240 x 480 with Jumpers

Secondary: 120 x 240 with Jumpers, Secondary Fuse Clips not Applicable

50

75

100

150

2-9/16

2-7/8

3-3/16

3

3-3/8

3-3/4

3

3-1/2

3-3/8

4

2.6

3.5

4.2

6.7

65

73

81

76

86

95

76

89

86

102

1.2

1.6

1.9

3.1

11

C0050E2CXX

C0075E2CXX

C0100E2CXX

C0150E2CXX

68.

75.

82.

107.

200

250

300

3-13/16

4-1/2

4

4-3/8

4-7/8

8.5

10.0

11.8

97

114

102

111

124

3.9

4.6

5.4

11

C0200E2CXX

C0250E2CXX

C0300E2CXX

129.

144.

158.

350

500

750

3-13/16

4-3/4

4-1/2

5-1/4

7

13.6

17.5

26.4

97

121

114

133

178

6.2

8.0

12.0

11

C0350E2CXX

C0500E2CXX

C0750E2CXX

171.

196.

263.

Primary: 550/575/600

Secondary: 110/115/120 with for 13/32 x 1-1/2 Fuses

50

75

100

150

2-9/16

2-7/8

3-3/16

3

3-3/8

3-3/4

3

3-1/2

3-3/8

4

2.7

3.6

4.2

6.8

65

73

81

76

86

95

76

89

86

102

1.2

1.6

1.9

3.1

10

C0050E4C

C0075E4C

C0100E4C

C0150E4C

85.

92.

101.

117.

200

250

300

3-13/16

4-1/2

4

4-3/8

4-3/4

8.4

10.0

11.3

97

114

102

111

121

3.8

4.6

5.1

10

C0200E4C

C0250E4C

C0300E4C

129.

158.

171.

350

500

750

3-13/16

4-3/4

4-1/2

5-1/4

5-3/8

7

13.6

16.8

25.7

97

121

114

133

137

178

6.2

7.6

11.7

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

2-7/8

3

3-3/8

3

3-1/2

3-3/8

2.5

3.5

4.0

65

73

76

86

76

89

86

1.1

1.6

1.8

13

C0050E4H

C0075E4H

C0100E4H

92.

98.

107.

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4

4-3/8

6.5

8.2

10.0

81

97

95

114

102

111

3.0

3.7

4.5

13

C0150E4H

C0200E4H

C0250E4H

124.

134.

163.

300

350

500

3-13/16

4-3/4

4-1/2

5-1/4

4-3/4

5-1/4

5-1/2

11.0

13.6

17.7

97

121

114

133

121

133

140

5.0

6.2

8.0

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

2-7/8

3-3/16

3

3-3/8

3-3/4

3

3-1/2

3 3/8

4

2.5

3.5

4.0

6.5

65

73

81

76

86

95

76

89

86

102

1.1

1.6

1.8

3.0

12

C0050E4W

C0075E4W

C0100E4W

C0150E4W

92.

98.

107.

117.

200

250

300

3-13/16

4-1/2

4

4-3/8

4-3/4

8.2

10.0

11.0

97

114

102

111

121

3.7

4.5

5.0

12

C0200E4W

C0250E4W

C0300E4W

131.

159.

173.

350

500

750

3-13/16

4-3/4

4-1/2

5-1/4

5-1/2

7-3//8

13.6

17.7

28.0

97

121

114

133

140

187

6.2

8.0

12.7

12

C0350E4W

C0500E4W

C0750E4WXX 

188.

203.

270.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-101

Transformers

9

Industrial Control Transformers

Type MTE

Vol. 1, Ref. No. [0401]

Table 9-121. Types MTE — Product Selection

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.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

3-3/16

3

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

81

76

86

95

76

86

98

108

1.6

2.0

2.7

3.5

5

C0050E3C

C0075E3C

C0100E3C

C0150E3C

85.50

92.50

102.00

118.00

200

250

300

3-13/16

4-1/2

4-1/4

4-3/4

5-1/8

9.0

9.7

11.7

97

114

108

121

130

4.1

4.4

5.3

5

C0200E3C

C0250E3C

C0300E3C

131.00

161.00

174.00

350

500

750

4-3/4

5-1/4

5

5-5/8

7

16.5

21.5

28.0

121

133

127

143

178

7.5

9.8

12.7

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

2-7/8

3-3/16

3

3-3/8

3-3/4

3

3-1/2

3-9/16

4

3.0

4.0

5.2

7.0

65

73

81

76

86

95

76

89

90

102

1.4

1.8

2.4

3.2

6

C0050E4D

C0075E4D

C0100E4D

C0150E4D

85.00

92.00

101.00

117.00

200

250

300

3-13/16

4-1/2

4

4-3/8

4-3/4

8.7

10.2

11.0

97

114

102

111

121

3.9

4.6

5.0

6

C0200E4D

C0250E4D

C0300E4D

129.00

158.00

171.00

350

500

750

3-13/16

4-3/4

4-1/2

5-1/4

5-3/8

7

13.0

20.0

28.0

97

121

114

133

136

178

5.9

9.1

12.7

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

C0050E5E

C0075E5E

C0100E5E

76.50

83.00

92.50

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4-3/8

4-1/2

5-1/4

7.9

10.6

13.9

81

97

95

114

111

114

133

3.6

4.8

6.3

7

C0150E5E

C0200E5E

C0250E5E

117.00

139.00

161.00

300

350

500

4-3/4

5-1/4

5-1/8

5-3/8

6-7/8

15.5

16.8

23.4

121

133

130

136

175

7.0

7.6

10.6

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

3-3/8

3-3/4

4-1/2

4

4-5/8

4-7/16

5-7/8

4.0

6.6

8.8

14.7

73

81

97

86

95

114

102

117

113

149

1.8

3.0

4.0

6.7

8

C0050E6U 

C0100E6U 

C0150E6U 

C0250E6U 

150.00

159.00

165.00

197.00

350

500

750

4-7/16

5-3/4

5-1/4

6-3/4

5-5/8

7

5-11/16

18.6

25.6

30.5

113

146

133

171

143

178

144

8.4

11.6

13.8

8

C0350E6U 

C0500E6U 

C0750E6U 

228.00

287.00

332.00

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-102

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTE Vol. 1, Ref. No. [0402]

Table 9-122. Transformers with Primary Fuse Blocks — Product Selection

See Page 9-97 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

50

75

100

3-15/16

4-1/4

3

3-3/8

3

3-1/2

3-3/8

2.8

3.7

4.4

100

108

76

86

76

89

86

1.3

1.7

2.0

1

C0050E2AFB

C0075E2AFB

C0100E2AFB

71.00

82.00

87.00

150

200

250

4-9/16

5-3/16

3-3/4

4-1/2

4

4-3/8

6.9

8.7

10.2

116

132

95

114

102

111

3.1

3.9

4.6

1

C0150E2AFB

C0200E2AFB

C0250E2AFB

101.00

119.00

136.00

300

350

500

5-3/16

6-1/8

4-1/2

5-1/4

4-3/4

5-1/4

5-1/2

11.5

13.8

19.4

132

156

114

133

121

133

140

5.2

6.3

8.8

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

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

4-1/4

3

3-3/8

3

3-1/2

3-3/8

2.8

3.8

4.4

100

108

76

86

76

89

86

1.3

1.7

2.1

2

C0050E2BFB

C0075E2BFB

C0100E2BFB

80.00

90.50

101.00

150

200

250

4-9/16

5-3/16

3-3/4

4-1/2

4

4-3/8

6.9

8.7

10.3

116

132

95

114

102

111

3.1

3.9

4.7

2

C0150E2BFB

C0200E2BFB

C0250E2BFB

125.00

147.00

164.00

300

350

500

5-3/16

6-1/8

4-1/2

5-1/4

4-3/4

5-1/4

5-5/8

11.6

13.6

17.7

132

156

114

133

121

133

143

5.3

6.2

8.0

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

4-1/4

3

3-3/8

3

3 1/2

3 3/8

2.8

3.8

4.6

100

108

76

86

76

89

86

1.3

1.7

2.1

3

C0050E1BFB

C0075E1BFB

C0100E1BFB

80.00

90.50

101.00

150

200

250

4-9/16

5-3/16

3-3/4

4-1/2

4

4 3/8

6.9

8.5

10.3

116

132

95

114

102

111

3.1

3.9

4.7

3

C0150E1BFB

C0200E1BFB

C0250E1BFB

125.00

147.00

164.00

300

350

500

5-3/16

6-1/8

4-1/2

5-1/4

4 3/4

5 1/4

5 5/8

11.4

13.4

17.7

132

156

114

133

121

133

143

5.2

6.1

8.0

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

4-1/4

3

3-3/8

3

3-1/2

3-3/8

3.1

4.0

4.7

100

108

76

86

76

89

86

1.4

1.8

2.1

4

C0050E3AFB

C0075E3AFB

C0100E3AFB

78.50

90.00

100.00

150

200

250

4-9/16

5-3/16

3-3/4

4-1/2

4

4-3/8

7.1

8.9

10.4

116

132

95

114

102

111

3.2

4.0

4.7

4

C0150E3AFB

C0200E3AFB

C0250E3AFB

122.00

145.00

162.00

300

350

500

5-3/16

6-1/8

4-1/2

5-1/4

4-3/4

5-1/4

5-3/8

11.6

13.9

17.4

132

156

114

133

121

133

143

5.3

6.3

7.9

4

C0300E3AFB

C0350E3AFB

C0500E3AFB

176.00

188.00

213.00

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-103

Transformers

9

Industrial Control Transformers

Type MTE

Vol. 1, Ref. No. [0403]

Table 9-123. Transformers with Primary Fuse Blocks — Product Selection

See Page 9-98 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

4-1/4

4-9/16

3

3 -3/8

3-3/4

3

3-1/2

3 3/8

4

2.9

3.8

4.4

7.0

100

108

116

76

86

95

76

89

86

102

1.3

1.7

2.0

3.2

10

C0050E4CFB

C0075E4CFB

C0100E4CFB

C0150E4CFB

103.

110.

119.

135.

200

250

300

5-3/16

4-1/2

4

4 3/8

4 3/4

8.6

10.2

11.5

132

114

102

111

121

3.9

4.6

5.2

10

C0200E4CFB

C0250E4CFB

C0300E4CFB

147.

176.

188.

350

500

750

5-3/16

6-1/8

4-1/2

5-1/4

5 1/4

5 3/8

7

13.8

17.0

25.9

132

156

114

133

137

178

6.3

7.7

11.8

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

2-7/8

3

3-3/8

3

3-1/2

3-3/8

2.6

3.7

4.2

65

73

76

86

76

89

86

1.2

1.7

1.9

13

C0050E4HFB

C0075E4HFB

C0100E4HFB

110.

115.

125.

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4

4-3/8

6.7

8.4

10.2

81

97

95

114

102

111

3.0

3.8

4.6

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

2-7/8

3

3-3/8

3

3-1/2

3-3/8

2.7

3.7

4.2

65

73

76

86

76

89

86

1.2

1.7

1.9

12

C0050E4WFB

C0075E4WFB

C0100E4WFB

110.

115.

125.

150

200

250

3-3/16

3-13/16

3-3/4

4-1/2

4

4-3/8

6.7

8.4

10.2

81

97

95

114

102

111

3.0

3.8

4.6

12

C0150E4WFB

C0200E4WFB

C0250E4WFB

135.

150.

178.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-104

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTE Vol. 1, Ref. No. [0404]

Table 9-124. Transformers with Primary Fuse Blocks — Product Selection

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.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

3

3-3/8

3

3-3/8

3-7/8

3.7

4.7

6.2

97

108

76

86

76

86

98

1.7

2.1

2.8

5

C0050E3CFB

C0075E3CFB

C0100E3CFB

104.

111.

119.

150

200

250

4-9/16

5-3/16

3-3/4

4-1/2

4-1/4

4-3/4

7.9

9.2

9.9

116

132

95

114

108

121

3.6

4.2

4.5

5

C0150E3CFB

C0200E3CFB

C0250E3CFB

136.

150.

179.

300

350

500

5-3/16

6-1/8

4-1/2

5-1/4

5-1/8

5

5-7/8

11.9

16.7

21.7

132

156

114

133

130

127

149

5.4

7.6

9.9

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

50

75

100

3-15/16

4-1/4

3

3-3/8

3

3-1/2

3-9/16

3.2

4.2

5.4

100

108

76

86

76

89

90

1.5

1.9

2.5

6

C0050E4DFB

C0075E4DFB

C0100E4DFB

103.

110.

119.

150

200

250

4-9/16

5-3/16

3-3/4

4-1/2

4

4-3/8

7.2

8.9

10.4

116

132

95

114

102

111

3.3

4.0

4.7

6

C0150E4DFB

C0200E4DFB

C0250E4DFB

135.

147.

176.

300

350

500

5-3/16

6-1/8

4-1/2

5-1/4

4-3/4

5-1/4

5-5/8

11.2

13.2

20.2

132

156

114

133

121

133

143

5.1

6.0

9.2

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

C0050E5EFB

C0075E5EFB

C0100E5EFB

94.

101.

111.

150

200

250

4-9/16

5-3/16

3-3/4

4-1/2

4-3/8

4-1/2

5-1/4

8.1

10.8

14.1

116

132

95

114

111

114

133

3.7

4.9

6.4

7

C0150E5EFB

C0200E5EFB

C0250E5EFB

135.

157.

180.

300

350

500

6-1/8

5-1/4

5-1/8

5-3/8

6-7/8

15.7

17.0

23.6

156

133

130

136

175

7.1

7.7

10.7

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

C0050E6UFB 

C0100E6UFB 

C0150E6UFB 

167.

178.

183.

250

350

500

5-3/16

5-13/16

4-1/2

5-1/4

5-7/8

5-5/8

7

14.9

18.8

25.8

132

148

114

133

149

143

178

6.8

8.5

11.7

8

C0250E6UFB 

C0350E6UFB 

C0500E6UFB 

215.

246.

306.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-105

Transformers

9

Industrial Control Transformers

Type MTK

Vol. 1, Ref. No. [0405]

Type MTK

Type MTK Transformers

Product Description

■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 light-

ing grounds; greater safety is afforded

the operator. The control transformer

line is particularly adaptable on appli-

cations where compact construction

is demanded.

Features, Beneﬁts

and Functions

■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.

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.

Product Speciﬁcations

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

9-106

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type MTK Vol. 1, Ref. No. [0406]

Wiring Diagrams

Figure 9-24. Diagram 1

Figure 9-25. Diagram 2

Figure 9-26. Diagram 3

Figure 9-27. Diagram 4

Figure 9-28. Diagram 5

Figure 9-29. Diagram 6

Figure 9-30. Diagram 7

Figure 9-31. Diagram 8

Figure 9-32. Diagram 9

Figure 9-33. Diagram 10

Figure 9-34. Diagram 11

H1

H

3

H2

H4

H1

H

3

H2

H4

H1

H

3

H2

H4

X4

X2

X

3

X1

X4

X2

X

3

X1

X4

X2

X

3

X1

24

0

V

480 V

240 V

12

0

V



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-107

Transformers

9

Industrial Control Transformers

Type MTK

Vol. 1, Ref. No. [0407]

Wiring Diagrams

Figure 9-35. Diagram 12

Figure 9-36. Diagram 13

Figure 9-37. Diagram 14

Figure 9-38. Diagram 15

Figure 9-39. Diagram 16

H1

H2

X2

X1

600

V

5

7

5

V

550

V

24 V

2

3

V

22 V

H1

H2

X2

X1

42

0

V

4

00

V

380

V

24 V

2

3

V

22 V

H1

H2

H

3

H4

X

3

X2

X1

5

50

,

575

,

600 V

4

40

,

460

,

480 V

380

,

400

,

416 V

2

20

,

230

,

240 V

2

3

/

24

/

25

1

10

,

115

,

120

V

0

V

X4

X

3

X2

X1

H1

H2

H

3

H4

H

5

H

6

5

7

5

V

460

V

400

V

230

V

208

V

0

V

0

V

24 V

1

5

V

230

V

X4

X

3

X2

X1

H1

H2

H

3

H4

H

5

H

6

5

7

5

V

460

V

400

V

230

V

208

V

0

V

0

V

0

V

1

5

V

1

5

V



November 2003

9-108

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

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

See Page 9-106 and for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

Primary: 240 x 480, 230 x 460, 220 x 440

Secondary: 120/115/110

500

750

1000

1500

3-13/16

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

144

114

133

171

152

165

200

171

5.9

8.9

13.6

1

C0500K2A

C0750K2A

C1000K2A

C1500K2A

154.

215.

298.

413.

2000

3000

5000

5-11/16

7-9/16

6-3/4

9

7

7-1/2

7-3/4

38.0

53.0

89.0

144

192

171

229

178

191

197

17.3

24.1

40.5

1

C2000K2A

C3000K2A

C5000K2A

452.

700.

1,160.

Primary: 208/277

Secondary: 120

1000

1500

2000

5-3/8

5-11/16

6-3/8

6-3/4

7-1/8

7-1/2

8-1/4

29.0

33.0

43.0

137

144

162

171

181

191

210

13.1

15.0

19.5

4

C1000K3A

C1500K3A

C2000K3A

329.

452.

497.

3000

5000

7-5/8

10-3/16

9

8-1/4

10-1/2

64.0

102.0

194

259

229

210

267

29.0

46.3

4

C3000K3A

C5000K3A

770.

1,270.

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

7-1/8

8-1/4

7-9/16

29.2

33.5

42.5

137

144

192

162

171

229

184

210

192

13.3

15.2

19.3

5

C1000K3C

C1500K3C

C2000K3C

339.

462.

511.

3000

5000

7-9/16

7-3/16

9

8-5/8

13-1/2

63.7

102.0

192

259

229

219

343

29.0

46.4

5

C3000K3C

C5000K3C

798.

1,310.

Primary: 208/380/416

Secondary: 115/95

1000

1500

2000

5-3/8

5-11/16

6-3/8

6-3/4

7-1/8

8-1/4

9-1/4

29.0

43.0

55.0

137

144

162

171

181

210

235

13.1

19.5

25.0

9

C1000K3D

C1500K3D

C2000K3D

339.

462.

511.

3000

5000

7-5/8

10-3/16

9

8-5/8

11

74.0

108.0

194

259

229

219

279

33.5

49.0

9

C3000K3D

C5000K3D

798.

1,310.

Primary: 550/575/600

Secondary: 110/115/120

1000

1500

2000

5-3/8

5-11/16

6-3/8

6-3/4

7-1/8

7-1/2

8-1/4

29.0

33.0

43.0

137

144

162

171

181

191

210

13.1

15.0

19.5

10

C1000K4C

C1500K4C

C2000K4C

339.

462.

511.

3000

5000

7-5/8

10-3/16

9

8-1/4

10-1/2

64.0

102.0

194

259

229

210

267

29.0

46.3

10

C3000K4C

C5000K4C

798.

1,310.

Primary: 380/400/415

Secondary: 110 x 220

1000

1500

2000

5-11/16

6-3/4

6-1/2

7-1/2

8-1/4

28.0

33.0

43.0

144

171

165

191

210

12.7

15.0

19.5

6

C1000K4D

C1500K4D

C2000K4D

332.

455.

504.

3000

5000

7-5/8

10-3/16

9

8-1/4

10-1/2

64.0

102.0

194

259

229

210

267

29.0

46.3

6

C3000K4D

C5000K4D

784.

1,280.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-109

Transformers

9

Industrial Control Transformers

Type MTK

Vol. 1, Ref. No. [0409]

Table 9-127. Type MTK — Product Selection

See Page 9-106 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

7-7/8

7-1/4

8

26.4

31.0

40.0

113

144

146

133

171

200

184

203

12.0

14.1

18.2

11

C1000K2CXX

C1500K2CXX

C2000K2CXX

329.

462.

599.

3000

5000

7-5/8

9

7-1/2

9-1/4

56.0

85.5

194

229

191

235

25.5

28.9

11

C3000K2CXX

C5000K2CXX

770.

1,270.

Primary: 120 x 240 with Jumpers

Secondary: 24

750

1000

4-1/2

5-1/4

6-3/4

8-3/4

19.0

26.4

114

133

171

222

8.6

12.0

3

C0750K1B

C1000K1B

276.

413.

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

6-3/4

6-1/2

7-7/8

9-3/16

26.5

38.5

52.0

146

171

165

200

233

12.0

17.5

23.6

8

C1000K6U

C1500K6U

C2000K6U

511.

746.

928.

3000

5000

7-3/4

9-7/8

9

7-1/2

10-1/2

68.0

105.0

197

248

229

191

267

30.9

47.7

8

C3000K6U

C5000K6U

1,305.

1,700.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-110

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

CE Marked Vol. 1, Ref. No. [0410]

CE Marked

Terminal Type A

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 indepen-

dent of the power or lighting grounds;

greater safety is afforded the operator.

The control transformer line is particu-

larly adaptable on applications where

compact construction is demanded.

Features, Beneﬁts

and Functions

Type MTE

■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.

Type MTK

■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.

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

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 Terminal Covers (Optional)

■Fits CE marked designs 50 – 750 VA.

■Fits MTE designs 25 – 750 VA.

Table 9-128. Finger-Safe Terminal Covers

Finger-Safe Terminal Covers — FSK4

Finger-Safe Terminal Covers — FSK6

Finger-Safe Primary Fuse Block Covers

■Fits 2-pole primary fuse blocks on

MTE designs.

Table 9-129. Finger-Safe Primary Fuse

Block Covers

Finger-Safe Primary Fuse Block Covers

Description Catalog

Number

Price

U.S. $

4 Terminal Transformers

6 Terminal Transformers

FSK4

FSK6

24.

25.

Description Catalog

Number

Price

U.S. $

Primary Fuse Block Covers FSKFB 38.

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-111

Transformers

9

Industrial Control Transformers

CE Marked

Vol. 1, Ref. No. [0411]

Product Speciﬁcations

Overload Capability

Short-term overload is designed into

transformers as required by ANSI.

Basically, dry-type distribution trans-

formers 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature rise with nameplate loading.

Insulation System and Temperature Rise

Industry standards classify insulation

systems and rise as shown below:

Table 9-130. 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.

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C

Wiring Diagrams

Figure 9-40. Diagram 1

Figure 9-41. Diagram 2

Figure 9-42. Diagram 3

Figure 9-43. Diagram 4

Figure 9-44. Diagram 5

Figure 9-45. Diagram 6



November 2003

9-112

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

CE Marked Vol. 1, Ref. No. [0412]

Wiring Diagrams

Figure 9-46. Diagram 7

Figure 9-47. Diagram 8

Figure 9-48. Diagram 9

Figure 9-49. Diagram 10

Figure 9-50. Diagram 11

Figure 9-51. Diagram 12

Figure 9-52. Diagram 13

Figure 9-53. Diagram 14

Figure 9-54. Diagram 15

Figure 9-55. Diagram 16

H1

H

3

H2

H4

H1

H

3

H2

H4

H1

H

3

H2

H4

X4

X2

X

3

X1

X4

X2

X

3

X1

X4

X2

X

3

X1

24

0

V

480 V

240 V

12

0

V

H1

H2

X2

X1

600

V

5

7

5

V

550

V

24 V

2

3

V

22 V

H1

H2

X2

X1

42

0

V

4

00

V

380

V

24 V

2

3

V

22 V

H1

H2

H

3

H4

X

3

X2

X1

5

50

,

575

,

600 V

4

40

,

460

,

480 V

380

,

400

,

416 V

2

20

,

230

,

240 V

2

3

/

24

/

25

1

10

,

115

,

120

V

0V

0

V

X4

X

3

X2

X1

H1

H2

H

3

H4

H

5

H

6

5

7

5

V

460

V

400

V

230

V

208

V

0

V

0

V

24 V

1

5

V

230

V

X4

X

3

X2

X1

H1

H2

H

3

H4

H

5

H

6

5

7

5

V

460

V

400

V

230

V

208

V

0

V

0

V

0

V

1

5

V

1

5

V



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-113

Transformers

9

Industrial Control Transformers

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

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.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

CE0050E2A

CE0075E2A

CE0100E2A

CE0150E2A

98.

110.

122.

149.

200

250

300

3-13/16

4-1/2

4-3/4

5-1/4

10.6

11.3

13.2

97

114

121

133

4.8

5.1

6.0

1

CE0200E2A

CE0250E2A

CE0300E2A

159.

206.

217.

350

500

750

4-3/4

5-1/4

5

6

7-3/8

14.9

21.0

29.8

121

133

127

152

187

6.8

9.5

13.5

1

CE0350E2A

CE0500E2A

CE0750E2A

252.

274.

406.

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

3-5/8

4

3.4

4.2

5.9

8.5

65

73

81

97

76

86

95

114

83

92

102

1.5

1.9

2.7

3.9

2

CE0050E2B

CE0075E2B

CE0100E2B

CE0150E2B

109.

119.

135.

168.

200

250

300

3-13/16

4-1/2

4-1/4

4-3/4

5-1/4

10.6

11.3

13.2

97

114

108

121

133

4.5

5.1

6.0

2

CE0200E2B

CE0250E2B

CE0300E2B

179.

227.

246.

350

500

750

4-3/4

5-1/4

5

5-1/2

7

14.9

19.2

28.1

121

133

127

140

178

6.8

8.7

12.8

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

3-5/8

4

3.4

4.2

5.9

8.5

65

73

81

97

76

86

95

114

83

92

102

1.5

1.9

2.7

3.9

3

CE0050E1B

CE0075E1B

CE0100E1B

CE0150E1B

109.

119.

135.

168.

200

250

300

3-13/16

4-1/2

4-1/4

4-3/4

5-1/4

10.6

11.3

13.2

97

114

108

121

133

4.5

5.1

6.0

3

CE0200E1B

CE0250E1B

CE0300E1B

179.

227.

246.

350

500

750

4-3/4

5-1/4

5

5-1/2

7-3/8

14.9

19.2

29.8

121

133

127

140

187

6.8

8.7

13.5

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

CE0050E4C

CE0075E4C

CE0100E4C

CE0150E4C

107.

118.

133.

166.

200

250

300

3-13/16

4-1/2

4-3/4

5-1/4

10.6

11.3

13.2

97

114

121

133

4.8

5.1

6.0

10

CE0200E4C

CE0250E4C

CE0300E4C

177.

224.

243.

350

500

750

4-3/4

5-1/4

5

6

7-3/8

14.9

21.0

29.8

121

133

127

152

187

6.8

9.5

13.5

10

CE0350E4C

CE0500E4C

CE0750E4C

273.

298.

438.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-114

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

CE Marked Vol. 1, Ref. No. [0414]

Table 9-132. Type MTE CE Marked IP00

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.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

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

3-5/8

4

3.5

4.8

5.9

8.5

65

73

81

97

76

86

95

114

89

92

102

1.6

2.2

2.7

3.9

6

CE0050E4D

CE0075E4D

CE0100E4D

CE0150E4D

143.

154.

166.

194.

200

250

300

3-13/16

4-1/2

4-3/4

5-1/4

10.6

11.3

13.2

97

114

121

133

4.8

5.1

6.0

6

CE0200E4D

CE0250E4D

CE0300E4D

206.

268.

281.

350

500

750

3-13/16

4-3/4

4-1/2

5-1/4

5-1/2

6

7-3/8

15.2

21.0

29.8

97

121

114

133

140

152

187

6.9

9.5

13.5

6

CE0350E4D

CE0500E4D

CE0750E4D

327.

357.

630.

Primary: 200/220/440, 208/230/460, 240/480

Secondary: 23/110, 24/115, 25/120

50

75

100

2-7/8

3-3/16

3-3/8

3-3/4

3-1/4

3-5/8

4-3/8

4.2

5.9

7.9

65

81

86

95

83

92

111

1.9

2.7

3.6

7

CE0050E5E

CE0075E5E

CE0100E5E

133.

147.

165.

150

200

250

3-13/16

4-1/2

4-1/4

5

5-1/2

10.0

12.8

15.2

97

114

108

127

140

4.5

5.8

6.9

7

CE0150E5E

CE0200E5E

CE0250E5E

201.

214.

278.

300

350

500

4-3/4

5-1/4

5-3/8

5-1/2

7-1/4

16.8

19.2

27.0

121

133

137

140

184

7.6

8.7

12.3

7

CE0300E5E

CE0350E5E

CE0500E5E

300.

339.

375.

For other ratings or styles not shown, refer

to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-115

Transformers

9

Industrial Control Transformers

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

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.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Terminal

Type

Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

Primary: 240 x 480, 230 x 460, 220 x 440 with Jumpers

Secondary: 120/115/110

250

300

350

500

4

4-1/2

4-5/16

4-7/8

5-3/16

5-5/8

8.8

11.0

11.2

14.8

102

114

110

124

132

143

4.0

5.0

5.1

6.7

A

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

C

1

CE0750K2AFS

CE1000K2AFS

CE1500K2AFS

320.

497.

686.

2000

3000

5000

7-1/2

9-3/8

6-3/4

9

6-7/16

6-1/4

8-3/4

45.1

65.2

104.8

191

238

172

229

164

159

222

20.5

29.6

47.5

C

1

CE2000K2AFS

CE3000K2AFS

CE5000K2AFS

753.

1,115.

1,595.

Primary: 240 x 480 with Jumpers

Secondary: 24

250

300

350

5-5/8

4-1/2

3-1/4

3-5/8

4-3/16

8.2

9.5

12.2

143

114

83

92

106

3.7

4.3

5.5

C

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

2

CE0500K2BFS

CE0750K2BFS

CE1000K2BFS

313.

368.

543.

Primary: 120 x 240 with Jumpers

Secondary: 24

250

300

350

5-5/8

4-1/2

3-1/4

3-5/8

4-3/16

8.3

9.3

12.0

143

114

83

92

106

3.8

4.2

5.4

C

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

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

4-1/2

4-7/16

4-3/4

5-3/16

12.5

14.0

15.3

98

114

113

121

140

5.7

6.3

6.9

B

7

CE0250K5EFS

CE0300K5EFS

CE0350K5EFS

267.

287.

328.

500

750

1000

5-1/16

7-3/16

5-1/4

6-3/8

6-1/4

5-13/16

6-3/16

20.8

29.8

30.2

129

183

133

162

159

148

157

9.4

13.5

13.7

B

C

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

113

114

133

137

144

140

6.5

7.2

7.5

B

14

CE0250K2UFS

CE0300K2UFS

CE0350K2UFS

400.

413.

452.

500

750

1000

5-1/16

7-3/16

5-1/4

6-3/8

6-3/16

5-11/16

6-7/8

20.5

28.8

39.4

129

183

133

162

157

144

175

9.3

13.1

17.9

B

C

14

CE0500K2UFS

CE0750K2UFS

CE1000K2UFS

539.

606.

693.

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



November 2003

9-116

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

CE Marked Vol. 1, Ref. No. [0416]

Table 9-134. Type MTK CE Marked with Factory Mounted Finger-Safe Terminal Covers IP20

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.

VA Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Terminal

Type

Wiring

Diagram 

Style

Number

Pricing

U.S. $

Height Width Depth Height Width Depth

Primary: 208/230/400/460/575

Secondary: 24 /115/230

250

300

350

500

3-7/8

4-7/16

4-1/2

5-1/4

5-1/2

6-1/16

5-3/4

7-5/16

14.9

17.4

17.8

26.6

98

113

114

133

140

154

146

186

6.8

7.9

8.1

12.1

B

15

CE0250K2VFS

CE0300K2VFS

CE0350K2VFS

CE0500K2VFS

424.

452.

487.

546.

750

1000

1500

5-15/16

7-1/2

6-3/8

6-3/4

6-3/16

6-7/8

6-3/4

32.5

44.0

45.4

151

191

162

172

157

175

172

14.7

20.0

20.6

B

C

15

16

CE0750K2VFS

CE1000K2VFS

CE1500K2WFS

753.

840.

865.

2000

3000

5000

9-3/8

9

6-1/4

8-1/8

9-15/16

58.6

92.9

127.4

238

229

159

206

252

26.6

42.1

57.8

C

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

4-1/2

5-1/16

5-1/2

11.4

13.6

14.2

102

114

135

140

5.2

6.2

6.4

A

8

CE0250K6UFS

CE0300K6UFS

CE0350K6UFS

410.

424.

455.

500

750

1000

4-1/2

5-1/4

6-3/8

5-5/8

6-1/16

17.4

27.5

27.9

114

133

162

143

187

154

7.9

12.5

12.6

A

8

CE0500K6UFS

CE0750K6UFS

CE1000K6UFS

539.

634.

711.

1500

2000

3000

5-13/16

7-5/8

8-1/4

6-3/4

9

6-5/16

5-3/4

6-9/16

43.1

56.0

76.2

148

194

210

172

229

160

146

167

19.5

25.4

34.6

A

B

8

CE1500K6UFS

CE2000K6UFS

CE3000K6UFS

847.

991.

1,265.

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-117

Transformers

9

Industrial Control Transformers

CE Marked

Vol. 1, Ref. No. [0417]

Table 9-135. Acceptable Rating of Primary Overcurrent Protection for CE Marked Control Transformers

Table 9-136. Acceptable Maximum Rating of Secondary Overcurrent Protection

Note: For values over 6.3A use 10 x 38 mm time-lag (IEC - 269-3-1). T

a = 40°C Control Type

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

1.0

2.0

4.0

2.0

4.0

6.0

4.0

6.0

4.0

8.0

4.0

10.0

6.0

12.0

8.0

20.0

12.0

208

220

230

1.0

2.0

1.0

2.0

4.0

6.0

8.0

6.0

12.0

10.0

240

277

380

1.0

.5

1.0

2.0

1.0

4.0

2.0

4.0

2.0

4.0

6.0

10.0

8.0

6.0

400

415

440

.5

1.0

2.0

1.0

2.0

4.0

2.0

4.0

6.0

460

480

550

.5

1.0

.5

1.0

2.0

1.0

2.0

4.0

2.0

4.0

6.0

4.0

575

600

.5

1.0

2.0

4.0

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

4.00

5.00

8.00

10.0

12.00

16.00

25.00

—

32.00

90

95

100

.63

.50

1.00

.80

1.25

1.00

2.00

1.60

2.50

2.00

3.15

2.50

4.00

3.15

4.00

6.30

5.00

10.00

8.00

110

115

120

.50

.80

.63

1.00

1.60

1.25

2.00

2.50

3.15

2.50

4.00

3.15

5.00

8.00

6.30

220

230

240

.25

.40

.315

.50

.80

.63

1.00

1.25

1.60

1.25

1.60

2.50

4.00

3.15



November 2003

9-118

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Industrial Control Transformers

Type AP Vol. 1, Ref. No. [0418]

Type AP

Type AP Transformer

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 light-

ing grounds; greater safety is afforded

the operator. The control transformer

line is particularly adaptable on appli-

cations 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.

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.

Product Speciﬁcations

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 con-

stant 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 trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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 gen-

eral purpose dry-type distribution

transformers are designed to meet

NEMA ST-20 levels.

Winding Terminations

Cutler-Hammer business recommends

external cables be rated 90ºC (sized

at 75°C ampacity) for encapsulated

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 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 “/” designa-

tion, a mid-point also becomes avail-

able 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.

Ambient +

Winding

Rise

+

Hot

Spot

=

Temp.

Class

40°C

55°C

80°C

115°C

150°C

10°C

30°C

105°C

150°C

185°C

220°C



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-119

Transformers

9

Industrial Control Transformers

Type AP

Vol. 1, Ref. No. [0419]

Product Selection

Additional Product Selection information begins on Page 9-136.

Table 9-138. Type AP

See Page 9-91 for Wiring Diagrams.

Note: For additional information refer to the Cutler-Hammer Industrial Control Transformer Binder B1228A.

kVA Mounting Dimensions (Inches) Weight

Lbs.

Dimensions (mm) Weight

kg

Frame Wiring

Diagram 

Style

Number

Price

U.S. $

Height Width Depth Height Width Depth

240/480 Volts to 120/240 Volts, 60 Hz

3

5

7.5

10

15

Bottom

8-5/16

10-3/4

12

9-9/16

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

305

243

273

335

224

221

259

289

265

29.5

47.2

58.6

67.2

89.4

FR133

FR99

FR100

FR101

FR134

5

C0003P7GB

C0005P7GB

C0007P7GB

C0010P7GB

C0015P7GB

1,375.

1,710.

2,350.

2,930.

3,970.

3

5

7.5

10

15

Side/Wall

9-3/4

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

13-3/16

65

104

129

148

197

248

295

327

224

221

275

289

265

243

273

335

29.5

47.2

58.6

67.2

89.4

FR292

FR256

FR257

FR258

FR259

5

C0003P7GS

C0005P7GS

C0007P7GS

C0010P7GS

C0015P7GS

1,375.

1,710.

2,350.

2,930.

3,970.

For other ratings or styles not shown, or for

special enclosure types (including stainless

steel) refer to Eaton’s Cutler-Hammer business. Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . . . DT-1



November 2003

9-120

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

Options, Accessories and Parts Vol. 1, Ref. No. [0420]

Options and Accessories

(Order Separately)

Weathershield Kit

Note: For 316 grade stainless steel add the

sufﬁx ‘S’ to the catalog number.

Weathershield Kit

A weathershield kit consisting of a

front and rear cover shield must be

installed on all ventilated dry-type dis-

tribution transformers when the unit is

located outdoors. The shields protect

the transformer top ventilation open-

ings against rain but allow for proper

ventilation. Field installation hardware

is not required. Refer to speciﬁc trans-

former listing for selection of weather-

shield kit. Proper installation provides

a NEMA 3R rating.

Table 9-139. Weathershield Kit

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.

Terminal Extension Kit

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

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.

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.

Wall mounting brackets ﬁt the

following frames.

Table 9-141. Availability Guide —

Wall Mounting Bracket WMB01

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.

Fits Frame 

Size(s)

Catalog 

Number

Price

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,

915A, 916, 914B, 915B

WS33 350.

916A WS19 350.

917, 918, 918A WS34 800.

919, 920 WS35 1,360.

922 WS36 1,360.

815 WS15 350.00

Fits Frame 

Size(s)

Bus

Material

Catalog

Number

Price

U.S. $

919 Aluminum EXT55AL 500.

919 Copper EXT55CU 750.

920 Aluminum EXT77AL 500.

920 Copper EXT77CU 750.

Frame 

Sizes

Catalog

Number

Price

U.S. $

Type DS-3 (Single-Phase Compatible)

809, 810, 811, 812, 813, 815,

816, 817, 818, 819, 820, 835,

836, 837, 814A

WMB01 275.

Type DT-3, K-Factor, Drive Isolation

(Three-Phase Compatible)

909, 910, 911, 912, 910A,

911A, 912A, 913A, 913B,

914A, 914B, 915A, 915B

WMB01 275.

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-121

Transformers

9

General Purpose & Industrial Control Transformers

Options, Accessories and Parts

Vol. 1, Ref. No. [0421]

Table 9-142. Terminal Lug Kits for Type DT-3 Transformers

Table 9-143. Rodent Screens

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.

Table 9-144. Replacement Parts for Mini-Power Centers

Table 9-145. Case Parts for Ventilated Units

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.

Typical

Sizing

Terminal Lugs Hardware Catalog

Number

Price

U.S. $

Cable Range Quantity Bolt Size Quantity

15 – 37.5 kVA Single-Phase

15 – 45 kVA Three-Phase

#14 – #2

#6 – 250 kcmil

8

4

1/4-20 x 3/4 8 LKS1 95.

50 – 75 kVA Single-Phase

75 – 112.5 kVA Three-Phase

#6 – 250 kcmil 12 1/4-20 x 3/4

1/4-20 x 1-3/4

8

LKS2 190.

100 – 167 kVA Single-Phase

150 – 300 kVA Three-Phase

#6 – 250 kcmil

#2 – 600 kcmil

3

22

1/4-20 x 3/4

3/8-16 x 2

3

16

LKS3 740.

500 kVA Three-Phase #2 – 600 kcmil 29 3/8-16 x 2 18 LKS4 900.

Description Frame

Size(s) 

Catalog

Number

Price

U.S. $

Rodent screens are used to

discourage entry by birds

or rodents

909

910A, 911, 912

913B, 914B, 915B

RS01

RS02

RS03

350.

916

917, 918, 918A

919, 920

916A

922

RS04

RS05

RS06

RS07

RS08

800.

1,360.

800.

1,360.

Frame Deadfront Cover

(Breaker Cover)

Front Cover

283

284

285

286

287

47-37503

47-37503-2

47-37503-3

47-37503-4

47-37503-5

7074C98H04

7074C98H01

7074C98H02

7074C98H03

289

290

291

47-37459

47-37459-2

47-37459-3

7074C44H01

7074C44H02

7074C44H03

289A

290A

291A

47-42072-1

47-42072-2

47-42072-3

7074C44H01

7074C44H02

7074C44H03

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

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

Single-Phase, 600 Volt Class

809

810, 811, 835

812, 813, 836, 837, 838

814

7073C16P03

7073C16P01

7073C16P02

7073C54P01

7073C18P04

7073C18P01

7073C18P02

7073C18P05

7073C14P03

7073C14P01

7073C14P02

7073C14P04

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

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



November 2003

9-122

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations Vol. 1, Ref. No. [0422]

Technical Data

and Speciﬁcations

General Purpose — EP

Sand and Resin Encapsulated

EP Sand and Resin Encapsulated

Cutler-Hammer EP general purpose

transformers by Eaton Corporation are

single-phase, sand and resin encapsu-

lated designs suitable for indoor or

outdoor applications. The totally-

enclosed non-ventilated NEMA 3R

enclosure makes it ideally suited for

use in areas that contain dust, mois-

ture, 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.

General Purpose — EPT

Sand and Resin Encapsulated

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-ven-

tilated NEMA 3R enclosure makes the

EPT ideally suited for outdoor as well

as indoor locations. Type EPT trans-

formers utilize a 185°C insulation

system with 115°C standard.

General Purpose — DS-3 Ventilated

DS-3 Ventilated

DS-3 general purpose transformers are

single-phase ventilated units designed

primarily for indoor locations (also for

outdoor with the addition of weather-

shields). 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.

General Purpose — DT-3 Ventilated

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).

Non-Linear (K-factor)

Non-Linear Transformer

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.

Energy Efﬁcient

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 insula-

tion life. Available in ratings through

1000 kVA, 115°C or 80°C rise, all Cutler-

Hammer 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 pro-

vide maximum efﬁciency at 35% of

nameplate rating.



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-123

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations

Vol. 1, Ref. No. [0423]

Shielded Isolation

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 electro-

static shield grounded to the trans-

former case to attenuate electrical

disturbances on the line from being

transmitted to the load. Shielded Isola-

tion 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

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.

Mini-Power Center

The Mini-Power Center replaces 3 indi-

vidual components — a main breaker,

transformer, and panelboard — by

combining all 3 into one unit. All inter-

connecting 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

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.

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 termi-

nal lugs are not included. Lug kits are

available separately.

Overload Capability

Short-term overload capacity is

designed

into transformers as required

by ANSI. dry-type distribution trans-

formers will deliver 200% nameplate

load for one-half hour; 150% load for

one hour; and 125% load for four

hours without being damaged pro-

vided that a constant 50% load pre-

cedes and follows the overload. See

ANSI C57.96-01.250 for additional

limitations.

Continuous overload capacity is not

deliberately designed into a trans-

former because the design objective is

to be within the allowed winding tem-

perature 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

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 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.



November 2003

9-124

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations Vol. 1, Ref. No. [0424]

Enclosures

Eaton’s 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. 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.

Buck-Boost Transformers

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 sec-

ondary are electrically and mechani-

cally connected together. The required

secondary voltage is obtained by

“tapping-off” from the single winding.

Buck-Boost autotransformers are insu-

lated 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.

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 speciﬁed

temperature rise.

Table 9-146. Non-Linear Ratings

Sound Levels

All Cutler-Hammer 600 volt class gen-

eral 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 installa-

tion will likely be higher due to electri-

cal 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 re-

ﬂection. It is suggested that the follow-

ing 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 sound-

absorbing 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 uti-

lize a special encapsulation sys-

tem 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.

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%

11th

13th

15th

17th

.7%

.5%

.3%

3.0%

1.0%

.7%

.6%

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-125

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations

Vol. 1, Ref. No. [0425]

Table 9-148. Rated Line Amperes for kVA and Voltages of Single-Phase Transformers

Note: Line Current = (kVA x 1000)/Line Voltage

Table 9-149. Rated Line Amperes for kVA and Voltages of Three-Phase Transformers

Note: Three-Phase Line Current = (kVA x 1000)/(Line Voltage x 1.732)

Amperes

for kVA

Voltage

120 208 220 240 277 480 600 2400 4160

.25

.50

.75

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

10

15

25

83

125

208

48

72

120

45

68

114

41

62

104

36

54

90

20.8

31

52

16.7

25

41

4.2

6.2

10.4

2.4

3.6

6.0

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

100

167

833

1391

480

802

455

759

416

695

361

602

208

347

166

278

41.7

69.6

24.0

40.1

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

37.5

45

50

104

124

139

90.3

108

120

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

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



November 2003

9-126

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

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 

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.

Type kVA Dimensions (Inches) Weight Lbs. Losses in Watts Efﬁciency % Regulation Sound

Level

dB

Height Width Depth Al Cu N.L. Total 1/4

Load

1/2

Load

3/4

Load

Full

Load

100%

P. F.

80%

P. F.

% Imp.



EP

115°C

Rise

.05

.075

.10

.15

6-1/2

3-7/8

3-1/2

—

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

.25

.5

.75

1

6-1/2

8-3/8

4-7/8

6

3-7/8

4-5/8

5-1/2

—

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

1.5

2

3

5

10-1/2

14-1/4

16

6-3/8

71-1/16

10-3/8

6-1/8

8

9-7/8

65

113

—

40

69

120

30

61

104

90

100

135

215

92.5

94.2

92.0

91.8

94.7

95.7

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

7.5

10

15

25

16

19

22-5/16

10-3/8

13-3/8

16-3/8

9-7/8

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

98.4

1.5

1.6

1.1

2.4

2.5

2.8

2.5

2.8

3.0

3.1

45

50

EPT 

115°C

Rise

3

6

9

15

13-3/8

15-7/8

17-3/8

15-15/16

16-1/2

19-11/16

8-5/16

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

50

30

45

75

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

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

55

DS-3

150°C

Rise

15

25

37.5

50

30-1/4

31-1/4

37-5/8

16-7/8

22-5/8

15-7/8

17-1/2

19-1/2

147

212

306

340

165

237

343

381

200

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

97.4

97.1

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

75

100

167

42-1/8

62-7/8

24

30

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

55

DT-3

150°C

Rise

15

30

45

75

25

30-1/8

39-3/8

20-1/8

26-1/8

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

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

50

112.5

150

225

300

39-3/8

46-5/8

56

62-1/4

26-1/8

28

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

55

500

750

1000

75

76

44-1/2

60

36

50

2400

2900

4530

3100

3600

5400

1500

2100



6875

10090



98.6

98.5



98.9



98.8



98.7



1.2

1.3



3.7

4.6



4.9

6.3



60

64

DT-3

115°C

Rise

15

30

45

75

25

30-1/8

39-3/8

20-1/8

26-1/8

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

45

50

112.5

150

225

300

39-3/8

46-5/8

56

62-1/4

26-1/8

28

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

98.1

98.2

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

55

500

750

75

76

44-1/2

60

36

50

2400

4530

3100

5400

1500



5955



98.5



98.9



99.0



98.8



1.0



4.0



5.5



60

64

DT-3

80°C

Rise

15

30

45

30-1/8

39-3/8

20-1/8

26-1/8

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

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

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

60



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-127

Transformers

9

General Purpose & Industrial Control Transformers

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 

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.

Type kVA Dimensions (Inches) Weight Lbs. Losses in Watts Efﬁciency % Regulation Sound

Level

dB

Height Width Depth Al Cu N.L. Total 1/4

Load

1/2

Load

3/4

Load

Full

Load

100%

P. F.

80%

P. F.

% Imp.



DT-3

150ºC

Rise

NEMA TP-1

15

30

45

25

30-1/8

20-1/8

14-1/8

152

230

310

172

300

370

80

100

170

822

1674

1885

98.6

97.3

97.5

96.3

96.7

97.2

95.4

95.6

96.5

94.3

94.4

95.6

3.3

3.6

2.7

4.8

5.1

4.4

6.4

7

5.9

45

75

112.5

150

39-3/8

46-1/2

26-1/8

28

19-1/8

23

480

600

800

550

675

1000

230

360

480

2534

3290

3552

98

98.2

97.7

97.9

98.2

97.1

97.4

97.8

96.4

96.9

97.4

2.1

2.3

1.6

4.3

4.6

3.8

5.7

5.9

5.3

50

225

300

500

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1250

1600

2400

1800

2150

3100

565

730

1350

6783

7477

8031

98.3

98.4

98.5

98

98.3

98.7

97.5

97.9

98.5

96.8

97.3

98.2

2.3

1.9

1.4

6.4

5.7

4.9

8.4

7.6

6.4

55

60

K-4

150°C

Rise

15

30

45

30-1/8

20-1/8

14-1/8

230

310

300

370

250

300

1090

1990

2110

92.2

95.2

96.3

93.5

95.3

96.5

92.9

94.3

95.8

91.8

93.0

94.9

3.5

3.7

2.6

5.1

6.0

4.3

5.2

6.3

4.5

45

75

112.5

150

39-3/8

56

26-1/8

31-1/4

19-1/8

24-1/4

480

600

1100

675

1200

400

600

900

2840

3870

5250

97.0

97.1

96.8

97.1

97.3

97.1

96.6

96.8

96.7

95.9

96.2

96.1

2.3

2.8

2.2

4.3

5.5

4.2

4.8

6.2

4.7

50

55

225

300

500

56

75

31-1/4

44-1/2

24-1/4

36

1100

2400

2800

1200

3100

3600

900

1100

1500

7270

8420

9620

97.6

97.9

98.5

97.6

97.9

98.8

97.1

97.5

98.7

96.5

96.9

98.5

1.1

1.6

.7

4.1

5.6

3.7

5.3

7.7

5.5

55

60

K-4

115°C

Rise

15

30

45

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

480

300

575

250

400

950

1840

2090

92.4

95.4

95.8

93.9

95.5

96.7

93.5

94.6

96.4

92.6

93.5

95.9

3.3

3.6

1.9

4.4

5.7

3.1

4.4

5.9

3.2

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

2360

3760

4260

96.2

96.8

97.0

96.9

97.2

97.4

96.7

96.8

97.2

96.2

96.7

2.1

2.8

1.9

3.8

4.9

3.9

4.2

5.4

4.5

50

225

300

500

62-1/4

75

90

31-1/4

44-1/2

69

30-1/4

36

42

1600

2400

4500

2150

3100



1100

1500

2600

4620

4980

5360

97.6

97.8

97.7

98.1

98.5

98.4

98.0

98.5

97.7

98.4

1.4

.8

.7

4.1

2.4

4.1

5.3

3.0

6.1

55

60

K-4

80°C

Rise

15

30

45

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

300

370

575

250

300

400

670

990

1170

92.8

95.4

96.0

94.7

96.5

97.0

94.7

96.3

97.0

94.2

95.9

96.6

2.0

1.8

3.1

2.7

3.2

3.1

2.8

3.3

45

75

112.5

150

39-3/8

56

26-1/8

31-1/4

19-1/8

24-1/4

600

1100

675

1200

600

900

2290

2610

3090

96.2

96.4

97.2

97.0

97.3

97.8

96.8

97.3

97.7

96.3

97.0

97.4

1.8

1.4

3.5

2.9

3.7

3.9

3.3

4.6

50

225

300

500

62-1/4

75



31-1/4

44-1/2



30-1/4

36



1600

2400



2150

3100



1100

1500



4320

5060



97.6

97.8



98.1

98.5



98.0

98.6



97.6

98.6



1.7

.7



4.6

2.4



5.9

3.2



55

60

K-13

150°C

Rise

15

30

45

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

300

370

575

250

300

400

900

1370

1730

92.5

95.1

95.7

94.1

95.9

96.4

93.7

95.5

96.1

92.9

94.7

95.5

2.5

2.3

2.0

3.9

3.6

3.1

4.1

3.7

3.2

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

2270

3370

4270

96.2

96.9

97.0

97.3

97.4

96.8

97.0

97.1

96.3

96.5

96.7

3.5

2.5

1.8

4.0

4.6

3.8

4.0

5.1

4.4

50

225

300

500

62-1/4

75

90

31-1/4

44-1/2

69

30-1/4

36

42

1600

2400

4500

2150

3100



1100

1500

2600

5080

5310

5625

97.5

97.7

97.9

98.4

97.7

98.4

98.5

97.3

98.3

98.4

1.7

.9

.6

4.2

2.5

3.3

5.2

3.2

4.7

55

60

K-13

115°C

Rise

15

30

45

30-1/8

39-3/8

20-1/8

26-1/8

14-1/8

19-1/8

230

310

480

300

370

575

250

300

400

790

1070

1300

92.6

95.3

95.9

94.4

96.4

96.9

94.2

96.1

96.8

93.5

95.6

96.4

2.4

1.8

1.6

3.5

2.4

3.0

3.6

2.4

3.3

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

1960

3140

3480

96.3

96.9

97.1

97.2

97.4

97.7

97.1

97.2

97.5

96.7

97.2

1.8

1.7

1.5

3.3

3.5

3.8

3.6

4.8

4.6

50

225

300

500

62-1/4

75

90

31-1/4

44-1/2

69

30-1/4

36

42

1600

2400

4500

2150

3100



1100

1500

2600

4200

4780

5360

97.6

97.8

97.7

98.1

98.5

98.4

98.0

98.5

97.7

98.4

1.6

.8

.7

4.2

2.4

3.3

5.3

3.1

4.7

55

60

K-13

80°C

Rise

15

30

45

75

30-1/8

39-3/8

46-5/8

20-1/8

26-1/8

28

14-1/8

19-1/8

23

230

310

480

785

300

370

575

870

250

300

400

700

690

990

1120

1800

92.7

95.4

96.0

95.8

94.7

96.5

97.1

97.0

94.6

96.3

97.0

94.1

95.9

96.7

96.8

2.3

1.8

1.4

1.6

3.3

2.7

3.0

3.4

2.8

3.0

3.3

45

50

112.5

150

225

300

56

62-1/4

75

31-1/4

44-1/2

24-1/4

30-1/4

36

1100

1600

2400

—

1200

2150

3100

3600

900

1100

1500

2100

2210

2350

2470

2860

96.4

96.8

97.1

97.5

97.8

98.2

97.5

97.9

98.3

98.4

97.3

97.8

98.3

98.4

1.1

.9

.6

.7

2.7

2.6

2.0

2.8

3.4

2.5

3.8

50

55



November 2003

9-128

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

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 individu-

ally 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, manu-

factured, 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 insula-

tion 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 ﬂame-

retardant and shall not support com-

bustion 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 densi-

ties shall be substantially below the

saturation point. The transformer core

volume shall allow efﬁcient trans-

former operation at 10% above the

nominal tap voltage. The core lamina-

tions 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 600-

volt 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 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 phosphatiz-

ing, followed by electrostatic deposi-

tion 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 tempera-

ture on top of the enclosure shall not

exceed 90°C.

On units rated [75 kVA and below]

[15 kVA and below] [9 kVA and below]

encapsulated the enclosure construc-

tion shall be totally enclosed, non-

ventilated, 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.

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

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.

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-129

Transformers

9

General Purpose & Industrial Control Transformers

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 accor-

dance 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) insula-

tion 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 ﬂame-

retardant and shall not support com-

bustion 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 densi-

ties shall be substantially below the

saturation point. The transformer core

volume shall allow efﬁcient trans-

former operation at 10% above the

nominal tap voltage. The core lamina-

tions 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 alumi-

num 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 mois-

ture. 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

Enclosures

The enclosure shall be made of heavy

gauge steel and shall be ﬁnished utiliz-

ing a continuous process of degreas-

ing, 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 tempera-

ture 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 open-

ings shall be protected against falling

dirt. On outdoor units, provide suitable

weathershields over ventilation

openings. To ensure proper ventila-

tion, 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.

Table 9-154. Non-Linear Ratings

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.

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

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%

13th

15th

17th

.5%

.3%

1.0%

.7%

.6%

Further Information . . . . . . . . . . . . . B.36B.01.S.E

For a complete product

speciﬁcation in CSI format,

see the Cutler-Hammer

Product Speciﬁcation Guide . . . . . Section 16462



November 2003

9-130

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations Vol. 1, Ref. No. [0430]

Typical Speciﬁcations —

Low Temperature Rise

Energy Efﬁcient

General

Furnish and install, three-phase low

temperature rise energy efﬁcient dry-

type 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.

Transformers shall be designed, manu-

factured, 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 ﬂame-

retardant and shall not support com-

bustion 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 core volume

shall allow efﬁcient transformer opera-

tion 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.

The core and coil assembly shall be

impregnated with non-hygroscopic,

thermosetting varnish and cured to

reduce hot spots and seal out mois-

ture. The assembly shall be installed

on vibration-absorbing pads.

Enclosures

The enclosure shall be made of heavy

gauge steel and shall be ﬁnished utiliz-

ing a continuous process of degreas-

ing, 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.

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 ventila-

tion, 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 maxi-

mum temperature on top of the

enclosure shall not exceed 90°C.

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 9-155. Average Sound Levels

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.

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 a complete product

speciﬁcation in CSI format,

see the Cutler-Hammer

Product Speciﬁcation Guide . . . . . Section 16461



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-131

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations

Vol. 1, Ref. No. [0431]

Typical Speciﬁcations —

Isolation Transformers with

Electrostatic Shielding

General

Furnish and install, single-phase and

three-phase general purpose individu-

ally 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, manu-

factured, 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 insula-

tion 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 ﬂame-

retardant and shall not support com-

bustion 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 elec-

trical 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 trans-

former 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 propor-

tioned 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 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 utiliz-

ing a continuous process of degreas-

ing, 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.

On units rated [75 kVA and below]

[15 kVA and below] [9 kVA and below]

encapsulated, the enclosure construc-

tion shall be totally enclosed, non-

ventilated, 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 ventila-

tion, 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 9-156. Average Sound Levels

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.

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



November 2003

9-132

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations Vol. 1, Ref. No. [0432]

Typical Speciﬁcation —

ac Adjustable Frequency

Drive Isolation Transformers

General

Furnish and install, single-phase and

three-phase general purpose individu-

ally mounted dry-type transformers

of the two-winding type, self-cooled,

with ratings and voltages for input

application as indicated on the draw-

ings. Transformers shall be manufac-

tured by Eaton’s Cutler-Hammer

business.

Transformers shall be designed, manu-

factured, 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 opera-

tion, 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 ﬂame-

retardant and shall not support com-

bustion 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 densi-

ties shall be substantially below the

saturation point. The transformer core

volume shall allow efﬁcient trans-

former operation at 10% above the

nominal tap voltage. The core lamina-

tions 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 600-

volt class windings shall be 10 kV.

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 mois-

ture. The assembly shall be installed

on vibration-absorbing pads.

Enclosures

The enclosure shall be made of heavy

gauge steel and shall be ﬁnished utiliz-

ing a continuous process of degreas-

ing, 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 ventila-

tion, locate the unit at least 6 inches

(152.4 mm) from the adjacent wall

or structure. On outdoor units, pro-

vide suitable weathershields over

ventilation openings.

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 9-157. Average Sound Levels

The following table lists the recom-

mended kVA size of the drive isolation

transformer for a speciﬁc horsepower

requirement.

Table 9-158. Three-Phase

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

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-133

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations

Vol. 1, Ref. No. [0433]

Typical Speciﬁcations —

Mini-Power Centers (3 – 30 kVA)

General

Furnish and install, single-phase and

three-phase general purpose individu-

ally 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 Cutler-

Hammer business.

Units shall be designed, manufac-

tured, 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 inter-

rupting 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 ﬂame-

retardant and shall not support com-

bustion 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 densi-

ties shall be substantially below the

saturation point.

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 alumi-

num with continuous wound construc-

tion. 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 propor-

tioned mixture of resin and aggregate

to provide a moistureproof, shock

resistant seal. The core and coil encap-

sulation system shall minimize the

sound level.

Enclosures

The enclosure shall be made of heavy

gauge steel and shall be ﬁnished utiliz-

ing a continuous process of degreas-

ing, cleaning, and phosphatizing,

followed by electrostatic deposition

of a thermosetting polymer polyester

powder coating and subsequent bak-

ing. 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 enclo-

sure shall be totally enclosed, non-

ventilated, NEMA 3R, with lifting eyes.

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

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.

kVA NEMA Average

Sound Level in dB

0 – 9

10 – 30

45

50



November 2003

9-134

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations Vol. 1, Ref. No. [0434]

Typical Speciﬁcation –—

NEMA TP-1-1996 Compliant

Energy Efﬁcient Transformers

General

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.

Transformers shall be designed, manu-

factured, 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.

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.

Insulation System and

Temperature Rise

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% con-

tinuous 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 retar-

dant 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 densi-

ties shall be substantially below the

saturation point. The transformer core

volume shall allow efﬁcient trans-

former operation at 10% above the

nominal tap voltage. The core lamina-

tions 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 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 mois-

ture. The assembly shall be installed

on vibration-absorbing pads.

Efﬁciency

Transformers shall be energy efﬁcient

with minimum efﬁciencies as set forth

per NEMA TP-1-1996 when operated at

35% of full load capacity.

Table 9-160. NEMA TP-1-1996 Efﬁciency Levels

Enclosures

The enclosure shall be made of heavy

gauge steel and shall be ﬁnished utiliz-

ing a continuous process of degreas-

ing, 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 enclosure construction shall be

ventilated, NEMA 2, drip-proof, with

lifting provisions. All ventilation

openings shall be protected against

falling dirt. To ensure proper ventila-

tion, 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 maxi-

mum 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

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.

Tables of Energy Efﬁciency

NEMA Class 1 Efﬁciency Levels

dry-type Distribution Transformers —

Low Voltage

Single-Phase Three-Phase

kVA Efﬁciency kVA Efﬁciency

15

25

37.5

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

—

225

300

500

750

1000

98.5

98.6

98.7

98.8

98.9

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



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-135

Transformers

9

General Purpose & Industrial Control Transformers

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

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.

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

Single-

Phase

kVA

Three-

Phase

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

EP 1561 E78389 591H EV157 LR60545 180 15 – 50 N/A 61558 /726 

EPT 506 E10156 591H — LR60545 180 N/A 3 – 9 61558 /726 

EPT 1561 E78389 591H EV157 LR60545 180 N/A 15 – 75 726

MPC 506 /1561 E53449 591H — LR60546 180 3 – 25 15 – 30 —

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



November 2003

9-136

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations Vol. 1, Ref. No. [0436]

Product Selection

Single-Phase Transformers

How to Select Single-Phase Units

1. Determine the primary (source)

voltage — the voltage presently

available.

2. Determine the secondary (load)

voltage — the voltage needed at

the load.

3. Determine the kVA load:

— If the load is deﬁned in kVA, a

transformer can be selected from

the tabulated data.

— 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:

kVA = Volts x Amperes

1000

— If the load is an ac motor, deter-

mine 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.

Table 9-163. Single-Phase ac Motors

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

Horsepower Full Load Amperes Minimum

Transformer kVA 

115 Volts 208 Volts 220 Volts 230 Volts

1/6

1/4

1/3

4.4

5.8

7.2

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

kVA Voltage

120 208 220 240 277 480 600 2400 4160

.25

.50

.75

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

10

15

25

83

125

208

48

72

120

45

68

114

41

62

104

36

54

90

20.8

31

52

16.7

25

41

4.2

6.2

10.4

2.4

3.6

6.0

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

100

167

833

1391

480

802

455

759

416

695

361

602

208

347

166

278

41.7

69.6

24.0

40.1



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-137

Transformers

9

General Purpose & Industrial Control Transformers

Technical Data and Speciﬁcations

Vol. 1, Ref. No. [0437]

Three-Phase Transformers

How to Select Three-Phase Units

1. Determine the primary (source)

voltage — the voltage presently

available.

2. Determine the secondary (load)

voltage — the voltage needed at

the load.

3. Determine the kVA load:

— If the load is deﬁned in kVA, a

transformer can be selected from

the tabulated data.

— 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:

kVA = Volts x Amperes x 1.732

1000

— If the load is an ac motor, deter-

mine 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.

Table 9-165. Three-Phase ac Motors

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

Horsepower Full Load Amperes Minimum

Transformer kVA 

208 Volts 230 Volts 380 Volts 460 Volts 575 Volts

1/2

3/4

1

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

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

37.5

45

50

104

124

139

90.3

108

120

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

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



November 2003

9-138

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

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

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.

Secondary Voltage

04 = 12/24

06 = 16/32

08 = 24/48

14 = 110/220

12 = 120

10 = 120 x 240

11 = 120/240

54 = 127/254

19 = 190Y/110

28 = 208Y/120

29 = 208

25 = 220 Delta

31 = 220Y/127

26 = 220∆/110 Midtap

22 = 240∆/120 Midtap

64 = 240Y139

24 = 240 Delta

20 = 240 x 480

21 = 240/480

27 = 277

38 = 380 Delta

37 = 380Y/220

34 = 400Y/231

51 = 416Y/240

35 = 440Y/254

62 = 460Y/266

47 = 480Y/277

48 = 480 Delta

60 = 600 Delta

61 = 600Y/346

42 = 2400

41 = 4160Y/2400

46 = 4160

49 = 4800

Type

S= EP (1-Ph encapsulated)

Y= EPT (3-Ph encapsulated)

T= DS-3 (1-Ph ventilated)

V= DT-3 (3-Ph ventilated)

P= Mini-Power Center

Z= Class 1 Division 2

Groups C and D

X= Harmonic Mitigating

(3-ph ventilated)

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 = 110 x 220

12 = 120

10 = 120 x 240

29 = 208

72 = 200

25 = 220

23 = 230

24 = 240

20 = 240 x 480

27 = 277

38 = 380

39 = 400

43 = 416

44 = 440

45 = 450

48 = 480

57 = 575

60 = 600

42 = 2400

46 = 4160

49 = 4800

40 = Export Model

Taps

D= 2@+2.5%, 2@-2.5%

E= 1@+5%, 1@-5%

F= 1@-10%

G= 2@-5%

J= 4@-2.5%

K= 1@-10% x 2@-5%

L= 2@-5% x 4@-2.5%

M= 2@+2.5%, 4@-2.5%

N= None

R= 1@+5%, 2@-5%

P= 1@+5%, 2@-5% x

2@+2.5%, 4@-2.5%

T= 1@+4.2%, 1@-4.2%

U= 1@+2.5%, 3@-2.5%

W= 1@+3.5%, 1@-3.5%

X= 2@+3.1%, 2 @-3.1%

Phase

A= Buck and Boost

B= 80°C Rise

F= 115°C Rise

E= Electrostatic Shield

S= Single

T= Three

Suffix Options

A...Z = 

CU = 

SS = 

ZZ = 

NV = 

X=



LS_ _ = 

AF = 

TR = 

SR = 

CE = 

T = 

EE = 

NON = 

POS = 

NEG = 

kVA

81 = .05

85 = .075

82 = .10

83 s= .15

26 = .25

51 = .50

76 = .75

01 = 1

16 = 1.5

02 = 2

03 = 3

05 = 5

06 = 6

07 = 7.5

09 = 9

10 = 10

15 = 15

21 = 22.5

25 = 25

30 = 30

37 = 37.5

45 = 45

50 = 50

75 = 75

99 = 100

12 = 112.5

49 = 150

67 = 167

22 = 225

52 = 250

33 = 300

54 = 333

55 = 500

60 = 600

77 = 750

11 = 1000

14 = 1500

S 20 N 11 S 05 A



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-139

Transformers

9

General Purpose & Industrial Control Transformers

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

For other tap combinations, contact your local Cutler-Hammer sales ofﬁce.

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∆

230∆

460∆

575∆

600∆

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∆

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

MD 145 E 89 B



November 2003

9-140

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

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

Note: For the Cutler-Hammer dry-type Transformers Catalog Numbering System see Page 9-138 and 9-139.

Type

C= Industrial

Control

Transformer

CE= CE Marked

Control

Transformer

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

Transformer

Design

A= MTA

C= MTC

E= MTE

G= MTG

K= MTK

P= AP

Voltage

Primary Secondary

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

230/460

220/380/440/550,

230/400/460/575,

240/416/480/600

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

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

24

110/115/120

110 x 220

115

22/23/24

23/110, 24/115,

25/120

99/120/130,

95/115/125,

91/110/120,

85/100/110

120/240

Modifications

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

CE 0250 G 2F ES



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-141

Transformers

9

General Purpose & Industrial Control Transformers

Price Modiﬁcations

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 regis-

tered 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 stan-

dard 150°C rise, aluminum wound transformer

with the same electrical conﬁguration as the

special unit you require, i.e., delta-delta con-

nected, 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 alu-

minum. 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 encap-

sulated is standard, on units rated 45

kVA and below, add 25%.

Rule 4. Electrostatic Shields

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%.

Note: For units rated 1000 kVA and above,

refer to the Cutler-Hammer business.

Rule 7. Special Sound Levels

When sound levels below NEMA stan-

dard 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 spe-

cial sound requirements, such as low

sound K-factor nonlinear products and

requirements for sound levels exceed-

ing 5 dB below NEMA standards.

Rule 8. Fungus Prooﬁng

Fungus prooﬁng consists of spraying

all equipment within the wiring com-

partment with a fungicidal varnish.

Add sufﬁx AF to style number if this

treatment is required. List price addi-

tions are:

Encapsulated design $250.00/unit

Ventilated design $500.00/unit

Rule 9. Non-Standard Taps

Standard high voltage taps are listed

in this catalog. When more than the

listed taps are required, refer to Divi-

sion. 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 sec-

ondary (delta only) winding of a three-

phase unit rated 30 through 300 kVA.

Tap is limited to 5% rated kVA.

For a 120 V single-phase tap, add 15%.

Rule 12. NEMA TP-1 Energy Efﬁcient

For ventilated transformers that

meet the NEMA TP-1 and Energy Star

energy efﬁciency standards, add 40%.

Rule 13. CE Marked

For single-phase encapsulated, or

ventilated transformers that comply

with European standards and have a

CE Mark, add 10%.

Rule 14. CSA Labeled

For transformers that are CSA labeled,

add 10%.

Rule 15. Thermal Indicators

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

Factory certiﬁed test reports are avail-

able only when they are requested at

the time of order entry. The following

Certiﬁed Test Reports are available:

A. Certiﬁed Report of Standard

Production Tests:

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

When paper print factory drawings are

required, add $25.00 net per item.

When sepia paper reproducible factory

drawings are required, add $100.00

net per item.

When aperture cards are required, add

$50.00 net per item.



November 2003

9-142

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

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 tempera-

ture of the air surrounding the trans-

former into which the heat of the

transformer is dissipated.

Attenuation: A decrease in signal power

or voltage. Unit of measure is dB.

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 sec-

ondary windings connected as an

autotransformer for boosting (increas-

ing) 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 three-

phase delta-delta transformers is

called a lighting tap. It provides 5%

of the transformer’s kVA for single-

phase 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 trans-

former with a turns ratio that provides a

higher than nameplate output (second-

ary) 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 resis-

tance, stray loss due to stray ﬂuxes in

the windings, core clamps, etc., as well

as circulating currents (if any) in paral-

lel 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 three-

phase 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 line-

to-ground noise.

Encapsulated Transformer: A trans-

former with its coils either dipped or

cast in an epoxy resin or other encap-

sulating 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 mea-

sured. 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.

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 resis-

tance 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-lim-

iting 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 insula-

tion. 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 heat-

ing generated by harmonic currents.

kVA: Kilovolt-ampere. Designates the

output that a transformer can deliver

for a speciﬁed time at a rated second-

ary voltage and rated frequency

without exceeding the speciﬁed

temperature rise.

1000 VA = 1 kVA



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-143

Transformers

9

General Purpose & Industrial Control Transformers

Glossary

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 trans-

former where the core and coil assem-

bly is mounted inside an enclosure

with no openings for ventilation. Also

referred to as Totally Enclosed Non-

Ventilated (TENV).

No Load Losses: Losses in a trans-

former that is excited at rated voltage

and frequency but which is not supply-

ing a load. No load losses include core

losses, dielectric losses, and conductor

losses in the winding due to the excit-

ing current. Also referred to as Excita-

tion Losses.

Percent IR (% resistance): Voltage drop

due to resistance at rated current in

percent of rated voltage.

Percent IX (% reactance): Voltage drop

due to reactance at rated current in

percent of rated voltage.

Percent IZ (% impedance): Voltage

drop due to impedance at rated cur-

rent in percent of rated voltage.

Phase: Type of ac electrical circuit; usu-

ally single-phase 2- or 3-wire, or three-

phase 3- or 4-wire.

Polarity Test: A standard test on trans-

formers to determine instantaneous

direction of the voltages in the primary

compared to the secondary.

Primary Taps: Taps added to the pri-

mary (input) winding. See Tap.

Primary Voltage: The input circuit

voltage.

Power Factor: the cosine of the phase

angle between a voltage and a current.

Ratio Test: A standard test of trans-

formers 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 pro-

ducing 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 three-

phase load, the transformer utilizes

only two sets of coils.

Star Connection: Same as a wye

connection.

Step-down Transformer: A trans-

former where the input voltage is

higher than the output voltage.

Step-up Transformer: A transformer

where the input voltage is less than

the output voltage.

Tap: A connection brought out of a

winding at some point between its

extremities, usually to permit chang-

ing 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.

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.

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 con-

nection; Polarity and Phase Relation

tests on the rated connection; No-load

and Excitation current tests at rated

voltage on the rated voltage connec-

tion and Applied Potential and Induced

Potential tests. Special tests include

sound level testing.

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.

Turns Ratio: The ratio of the number

of turns in the high voltage winding

to that in the low voltage winding.

Typical Test Data: Tests that were

performed on similar units that were

previously manufactured and tested.

UL (Underwriter’s Laboratories):

An independent safety testing

organization.

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).



November 2003

9-144

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

General Purpose & Industrial Control Transformers

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 regula-

tion you will have. 60 Hz transformers

may be used at lower frequencies but

only at reduced voltages correspond-

ing to the reduction in frequency.For

example, a 480 to 120 volt 60 Hz trans-

former can carry rated kVA at 50 Hz but

ONLY when applied as a 400 to 100

volt transformer (50/60 x 480 = 400).

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 three-

phase 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 three-

phase power from a single-phase system?

No. Single-phase transformers alone

cannot be used to create the phase-

shifts required for a three-phase sys-

tem. 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 surround-

ing a transformer to cool it, so the

temperature rise of the transformer

is increased. Therefore, when a trans-

former 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 trans-

formers are designed in accordance

with ANSI standards to operate in

areas where the average maximum

ambient temperature is 40°C. For oper-

ation in ambient temperatures above

40°C, there are two options:

1. Order a custom designed trans-

former 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 expect-

ancy 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, insu-

lation system temperatures (°C) have

replaced the letters’ designations.

Table 9-170. Insulation Classes

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 volt-

age between no load and full load con-

ditions, 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 reverse-

feeding a delta-wye connected trans-

former, there are two important con-

siderations 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 applica-

tions, it is recommended that you do

not reverse-feed transformers rated

more than 75 kVA. The preferred solu-

tion is to purchase a Cutler-Hammer

step up transformer designed speciﬁ-

cally for your application.

Insulation

System

Rating (°C)

Class A

Class B

Class F

105

150

180

Class H

Class R

220



November 2003

CA08101001E For more information visit: www.cutler-hammer.eaton.com

9-145

Transformers

9

General Purpose & Industrial Control Transformers

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 restric-

tions 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 trans-

former, 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:

Full load current for single-phase circuits is:

and for three-phase circuits the full load current is:

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:

The maximum short circuit load current is:

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 feder-

ally registered trademark of Underwriters Laboratories Inc.

Uniform Building Code (UBC) is a trademark of the Interna-

tional Conference of Building Ofﬁcials (ICBO). CSA is a regis-

tered trademark of the Canadian Standards Association.

National Electrical Code and NEC are registered trademarks

of the National Fire Protection Association, Quincy, Mass.

Maximum Short Circuit

Load Current (Amps)

Full Load Current (Amps)

Transformer Impedence

-------------------------------------------------------------------

=

Nameplate Volt-Amps

Load (output) Voltage

-----------------------------------------------------------

Nameplate Volt-Amps

Load (output) Volts 3×

--------------------------------------------------------------------

75,000 VA

208V x 1.732

--------------------------------- 208.2 A=

208.2 A

.051

------------------- 4,082.4 A=



November 2003

9-146

For more information visit: www.cutler-hammer.eaton.com CA08101001E

Transformers

9

Vol. 1, Ref. No. [0446]

This page intentionally left blank.



09_Nov03_ Brochure

92810-Brochure 92810-Brochure 92810-Brochure 786680 Batch2_1 unilog cesco-content

51422-Brochure- 1 51422-Brochure-_1 51422-Brochure-_1 786680 Batch2_1 unilog cesco-content

Navigation menu

Versions of this User Manual:

Views

Navigation