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DRAWING CREATED

2010-01-15

8420
in. (mm)

POST TYPE INSULATOR TR-202
TR-202

METAL CAP
BOTH ENDS

4 TAPPED HOLES Ø1/2"-13+.015 OVERSIZE
.62 (16) MIN. FULL THREAD ON 3.0 (76) B.C.
BOTH ENDS.

Reference

Color

084201111
084201101

LT. GRAY No. 70
BROWN

Ø4.25
(108)

MARK

7.5
(191)

Ø7.0
(178)

NOTE: TO PURCHASER
ALL SALES OF GAMMA PRODUCTS ARE
SUBJECT TO OUR STANDARD TERMS
AND CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER.

DWG. No. P:8420 /8420-CLIENTE

DWG. No.TYPE SALES

Autocad 2000

DWN. L.E. RINCÓN

APP. A.I.PÉREZ

DRAWING CREATED

2010-01-14

8425
in. (mm)

POST TYPE INSULATOR TR-205
TR-205

METAL CAP
BOTH ENDS

4 TAPPED HOLES Ø1/2"-13+.015 OVERSIZE
.62 (16) MIN. FULL THREAD ON 3.0 (76) B.C.
BOTH ENDS.

Reference

Color

084251111
084251101

LT. GRAY No. 70
BROWN

Ø4.25 (108)

MARK

10.0
(254)

Ø7 (178)

NOTE: TO PURCHASER
ALL SALES OF GAMMA PRODUCTS ARE
SUBJECT TO OUR STANDARD TERMS
AND CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER.

DWG. No. P:8425 /8425-CLIENTE

DWG. No.TYPE SALES

Autocad 2000

DWN. L.E. RINCÓN

APP. A.I.PÉREZ

DRAWING CREATED

2010-01-14

8428
in. (mm)

POST TYPE INSULATOR TR-208
TR-208

METAL CAP
BOTH ENDS
4 TAPPED HOLES Ø1/2"-13+.015 OVERSIZE
.62 (16) MIN. FULL THREAD ON 3.0 (76) B.C.
BOTH ENDS.

Reference

Color

084281111
084281101

LT. GRAY No. 70
BROWN

Ø4.25
(108)
MARK

14
(356)

Ø6.5
(167)

NOTE: TO PURCHASER
ALL SALES OF GAMMA PRODUCTS ARE
SUBJECT TO OUR STANDARD TERMS
AND CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER.

DWG. No. P:8428 /8428-CLIENTE

DWG. No.TYPE SALES

Autocad 2000

DWN. L.E. RINCÓN

APP. A.I.PÉREZ

DRAWING CREATED

2010-01-14

8430
in. (mm)

POST TYPE INSULATOR TR-210
TR-210

METAL CAP
BOTH ENDS
4 TAPPED HOLES Ø1/2"-13+.015 OVERSIZE
.62 (16) MIN. FULL THREAD ON 3.0 (76) B.C.
BOTH ENDS.

Ø3.0 (76)

Ø4.25
(108)

MARK

Reference

Color

084301111
084301101

LT. GRAY No. 70
BROWN

18.0
(457)

Ø7.5
(191)

NOTE: TO PURCHASER
ALL SALES OF GAMMA PRODUCTS ARE
SUBJECT TO OUR STANDARD TERMS
AND CONDITIONS AND THE LIMITED

DWG. No. P:8430 /8430-CLIENTE

DWG. No.TYPE SALES

Autocad 2000

DWN. L.E. RINCÓN

APP. A.I.PÉREZ

DRAWING CREATED

2010-01-14

8435
in. (mm)

POST TYPE INSULATOR TR-214
TR-214

METAL CAP
BOTH ENDS

4 TAPPED HOLES Ø1/2"-13+.015 OVERSIZE
.62 (16) MIN. FULL THREAD ON 3.0 (76) B.C.
BOTH ENDS.

Ø4.25
(108)
MARK

Reference

Color

084351111
084351101

LT. GRAY No. 70
BROWN

22.0
(559)

Ø7.7
(178)

NOTE: TO PURCHASER
ALL SALES OF GAMMA PRODUCTS ARE
SUBJECT TO OUR STANDARD TERMS
AND CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER.

DWG. No. P:8435 /8435-CLIENTE

DWG. No.TYPE SALES

Autocad 2000

DWN. L.E. RINCÓN

APP. A.I.PÉREZ

DRAWING CREATED

2010-01-15

8436
in. (mm)

POST TYPE INSULATOR TR-216
TR-216

METAL CAP
BOTH ENDS

MARK

4 TAPPED HOLES Ø1/2"-13+.015 OVERSIZE
.62 (16) MIN. FULL THREAD ON 3.0 (76) B.C.
BOTH ENDS.

Ø4.25
(108)

Reference

Color

084361111
084361101

LT. GRAY No. 70
BROWN

30.0
(762)

Ø8.1
(205)

NOTE: TO PURCHASER
ALL SALES OF GAMMA PRODUCTS ARE
SUBJECT TO OUR STANDARD TERMS
AND CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER.

DWG. No. P:8436 /8436-CLIENTE

DWG. No.TYPE SALES

Autocad 2000

DWN. L.E. RINCÓN

APP. A.I.PÉREZ

Technical reference number:

TR 286

EUROPE

BIL 550 kV

Top Flange View

PART NUMBER

CERISOL
in (mm)
TITLE

286SU0550

STATION POST INSULATOR. STANDARD STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Marks

Ø5.0 (Ø127)

CERISOL
EUROPE

Year-month
Serial number
286SU0550
TR286
SC907

Ø6.22 (Ø158)

Unit
Part n°

Unit
Shed ID

Weight:

Fixation:
Top / Bottom

S2907EJ

TR286
SC907

143 lb
65 kg

4 holes 5/8-11UNC
4 holes 5/8-11UNC

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

(21 Sheds) 45.0 ±0.06 (1143 ±1.6)

Ø8.46 (Ø215)

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

101
99

(2565)
(2515)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1700
1700
20000
40000
60000

(7562)
(7562)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

610
230
550

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

73
200

Other characteristics:
Insulating material:
Glaze:

Ø8.46 (Ø215)

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Shed Profile

18°

Ø6.22 (Ø158)
R 0.19 (5)

Ø5.0 (Ø127)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Bottom Flange View

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

1.69 (43)

10°

1.77 (45)

DWG. No.: H21286EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

TR 287

EUROPE

BIL 550 kV

Top Flange View

PART NUMBER

CERISOL
in (mm)
TITLE

287HU0550

STATION POST INSULATOR. HIGH STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Marks
CERISOL

Ø5.0 (Ø127)

EUROPE

Year-month
Serial number
287HU0550
TR287
SC914

Ø6.3 (Ø160)

Unit
Part n°

Unit
Shed ID

Weight:

Fixation:
Top / Bottom

S2914EJ

TR287
SC914

172 lb
78 kg

4 holes 5/8-11UNC
4 holes 5/8-11UNC

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

(21 Sheds) 45.0 ±0.06 (1143 ±1.6)

Ø9.41 (Ø239)

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

101
99

(2565)
(2515)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

2600
2600
25000
90000
75000

(11565)
(11565)
(112000)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

610
230
550

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

73
200

Other characteristics:
Insulating material:
Glaze:

Ø9.41 (Ø239)

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Shed Profile

18°

Ø6.3 (Ø160)
R 0.19 (5)

Ø5.0 (Ø127)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Bottom Flange View

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

1.69 (43)

10°

1.77 (45)

DWG. No.: H21287EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

TR 288

EUROPE

BIL 650 kV

Top Flange View

PART NUMBER

CERISOL
in (mm)
TITLE

288SU0650

STATION POST INSULATOR. STANDARD STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Marks

Ø5.0 (Ø127)

CERISOL
EUROPE

Year-month
Serial number
288SU0650
TR288
SC6905

Ø6.22 (Ø158)

Ø8.46 (Ø215)

Unit
Part n°

Unit
Shed ID

Weight:

Fixation:
Top / Bottom

S26905EJ

TR288
SC6905

159 lb
72 kg

4 holes 5/8-11UNC
4 holes 5/8-11UNC

(25 Sheds) 54.0 ±0.06 (1372 ±1.6)

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1
DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

121
116

(3073)
(2946)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1400
1400
20000
40000
60000

(6227)
(6227)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

710
275
650

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

88
200

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.

Ø8.46 (Ø215)

Shed Profile

18°

Ø6.22 (Ø158)

R 0.19 (5)

Ø5.0 (Ø127)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Bottom Flange View

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

1.77 (45)

10°

1.77 (45)

DWG. No.: H21288EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

TR 289

EUROPE

BIL 650 kV

Top Flange View

PART NUMBER

CERISOL
in (mm)
TITLE

289HU0650

STATION POST INSULATOR. HIGH STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Marks

Ø5.0 (Ø127)

CERISOL
EUROPE

Year-month
Serial number
289HU0650
TR289
SC913

Ø6.3 (Ø160)

Ø9.06 (Ø230)

Unit
Part n°

Unit
Shed ID

Weight:

Fixation:
Top / Bottom

S2913EJ

TR289
SC913

201 lb
91 kg

4 holes 5/8-11UNC
4 holes 5/8-11UNC

(25 Sheds) 54.0 ±0.06 (1372 ±1.6)

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1
DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

121
116

(3073)
(2946)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

2200
2200
25000
90000
75000

(9786)
(9786)
(88960)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

710
275
650

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

88
200

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.

Ø9.06 (Ø230)

Shed Profile

18°

Ø6.3 (Ø160)

R 0.19 (5)

Ø5.0 (Ø127)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Bottom Flange View

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

1.77 (45)

10°

1.77 (45)

DWG. No.: H21289EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

TR 291

EUROPE

BIL 750 kV

Top Flange View

PART NUMBER

CERISOL
in (mm)
TITLE

291SU0750

STATION POST INSULATOR. STANDARD STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Marks

Ø5.0 (Ø127)

CERISOL
EUROPE

Year-month
Serial number
291SU0750
TR291
SC911

Ø6.22 (Ø158)

Unit
Part n°

Unit
Shed ID

Weight:

Fixation:
Top / Bottom

S2911EJ

TR291
SC911

185 lb
84 kg

4 holes 5/8-11UNC
4 holes 5/8-11UNC

Ø8.78 (Ø223)

(27 Sheds) 62.0 ±0.09 (1575 ±2.4)

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1
DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

134
132

(3404)
(3353)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1200
1200
20000
40000
60000

(5338)
(5338)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

810
315
750

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

103
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.

Ø8.78 (Ø223)

Shed Profile

18°

R 0.19 (5)

Ø6.22 (Ø158)

Ø5.0 (Ø127)

Bottom Flange View
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

1.92 (49)

10°

1.77 (45)

DWG. No.: H21291EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

TR 295

EUROPE

BIL 750 kV

Top Flange View

PART NUMBER

CERISOL
in (mm)
TITLE

295HU0750

STATION POST INSULATOR. HIGH STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)
Marks

Ø5.0 (Ø127)

CERISOL
EUROPE

Year-month
Serial number
295HU0750
TR295
SC916

Ø6.3 (Ø160)

Unit
Part n°

Unit
Shed ID

Weight:

Fixation:
Top / Bottom

S2916EJ

TR295
SC916

230 lb
104 kg

4 holes 5/8-11UNC
4 holes 5/8-11UNC

Ø9.53 (Ø242)

(27 Sheds) 62.0 ±0.09 (1575 ±2.4)

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1
DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

134
132

(3404)
(3353)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1850
1850
25000
90000
75000

(8229)
(8229)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

810
315
750

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

103
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.

Ø9.53 (Ø242)

Shed Profile

18°

R 0.19 (5)

Ø6.3 (Ø160)

Ø5.0 (Ø127)

Bottom Flange View
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

1.92 (49)

10°

1.77 (45)

DWG. No.: H21295EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 304

EUROPE

BIL 900 kV

TITLE

STATION POST INSULATOR. STANDARD STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Top Flange View
Ø5.0 (Ø127)

Marks
Ø6.22 (Ø158)

EUROPE

(20 Sheds) 40.0 (1016)

Ø8.39 (Ø213)

80.0 ±0.13 (2032 ±3.2)

Ø9.25 (Ø235)
Ø7.87 (Ø200)

(20 Sheds) 40.0 (1016)

Ø8.39 (Ø213)

S2912EJ

UNIT 2

S3912EJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
128 lb 4 holes 5/8-11UNC
58 kg 4xØ18xØ200
128 lb 4xØ18xØ200
58 kg 4 holes 5/8-11UNC
256 lb
116 kg

(4343)
(4191)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

950
950
20000
40000
60000

(4226)
(4226)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1010
385
900

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)

18°

10°
1.53 (39)

Ø6.22 (Ø158)

Bottom Flange View

4xM16 Bolts
4xM16 Nuts
4 Washers

171
165

R 0.19 (5)

Ø5.0 (Ø127)

Galvanized
Steel:

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

Ø8.39 (Ø213)

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

UNIT 1

Unit
Shed ID
TR304
SC912
TR304
SC912

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø8.39 (Ø213)

UNIT 2

Unit
Part n°

CERISOL

Year-month
Serial number
304SU0900
TR304
SC912

UNIT 1

304SU0900

in (mm)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

1.57 (40)

DWG. No.: H21304EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 308

EUROPE

BIL 900 kV

in (mm)
TITLE

STATION POST INSULATOR. HIGH STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Top Flange View
Ø5.0 (Ø127)

Marks
Ø6.3 (Ø160)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
308HT0900
TR308
SC6904

UNIT 1
UNIT 2

(20 Sheds) 40.0 (1016)

Ø9.33 (Ø237)

UNIT 1

Ø10.24 (Ø260)
Ø8.86 (Ø225)

(20 Sheds) 40.0 (1016)

Ø9.33 (Ø237)

Unit
Shed ID
TR308
S26904EJ
SC6904
TR308
S36904EJ
SC6904
Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
174 lb 4 holes 5/8-11UNC
79 kg 4xØ18xØ225
174 lb 4xØ18xØ225
79 kg 4 holes 5/8-11UNC
348 lb
158 kg

Galvanized
Steel:
4xM16 Bolts
4xM16 Nuts
4x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

80.0 ±0.13 (2032 ±3.2)

Ø9.33 (Ø237)

UNIT 2

308HT0900

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

170
165

(4318)
(4191)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1450
25000
90000
75000

(6450)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1010
385
900

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.
Shed Profile (Unit 1,2)

R 0.19 (5)

10°

Ø5.0 (Ø127)
Bottom Flange View

1.53 (39)

Ø6.3 (Ø160)

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

18°

Ø9.33 (Ø237)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

1.57 (40)

DWG. No.: H21307EJ DWG: TYPE SALES Date: 2015/07/07

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 308

EUROPE

BIL 900 kV

in (mm)
TITLE

STATION POST INSULATOR. HIGH STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Top Flange View
Ø5.0 (Ø127)

Marks
Ø6.3 (Ø160)

EUROPE

(20 Sheds) 40.0 (1016)

Ø9.33 (Ø237)

Ø10.24 (Ø260)
Ø8.86 (Ø225)

(20 Sheds) 40.0 (1016)

Ø9.33 (Ø237)

UNIT 2

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
174 lb 4 holes 5/8-11UNC
79 kg 4xØ18xØ225
174 lb 4xØ18xØ225
79 kg 4 holes 5/8-11UNC
348 lb
158 kg

(4318)
(4191)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1450
1450
25000
90000
75000

(6450)
(6450)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1010
385
900

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)

18°

10°
1.53 (39)

Ø6.3 (Ø160)

Bottom Flange View

4xM16 Bolts
4xM16 Nuts
4x Washers

170
165

R 0.19 (5)

Ø5.0 (Ø127)

Galvanized
Steel:

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

Ø9.33 (Ø237)

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

UNIT 1

Unit
Shed ID
TR308
S26904EJ
SC6904
TR308
S36904EJ
SC6904

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

80.0 ±0.13 (2032 ±3.2)

Ø9.33 (Ø237)

UNIT 2

Unit
Part n°

CERISOL

Year-month
Serial number
308HU0900
TR308
SC6904

UNIT 1

308HU0900

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

1.57 (40)

DWG. No.: H21308EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 312

EUROPE

BIL 1050 kV

312ST1050

in (mm)
TITLE

STATION POST INSULATOR. STANDARD STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.22 (Ø158)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
312ST1050
TR312
SC907

(21 Sheds) 46.0 (1168.5)

Ø8.46 (Ø215)

UNIT 1

92.0 ±0.13 (2337 ±3.2)

Ø7.87 (Ø200)

(21 Sheds) 46.0 (1168.5)

Ø8.46 (Ø215)

UNIT 2

S3907MJ

UNIT 2

S4907MJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
137 lb 4 holes 5/8-11UNC
62 kg 4xØ18xØ200
137 lb 4xØ18xØ200
62 kg 4 holes 5/8-11UNC
274 lb
124 kg

Galvanized
Steel:
4xM16 Bolts
4xM16 Nuts
4x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø8.46 (Ø215)
Ø9.25 (Ø235)

UNIT 1

Unit
Shed ID
TR312
SC907
TR312
SC907

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

202
198

(5131)
(5030)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

800
20000
40000
60000

(3558)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1210
455
1050

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.
Shed Profile (Unit 1,2)

18°

R 0.19 (5)

Ø8.46 (Ø215)

1.39 (43)

10°
Ø6.22 (Ø158)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

1.77 (45)

DWG. No.: H21312EJ DWG: TYPE SALES Date: 2015/07/07

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 312 U

EUROPE

BIL 1050 kV

312SU1050

in (mm)
TITLE

STATION POST INSULATOR. STANDARD STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.22 (Ø158)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
312SU1050
TR312
SC907

(21 Sheds) 46.0 (1168.5)

Ø8.46 (Ø215)

UNIT 1

92.0 ±0.13 (2337 ±3.2)

Ø7.87 (Ø200)

(21 Sheds) 46.0 (1168.5)

Ø8.46 (Ø215)

UNIT 2

S3907MJ

UNIT 2

S4907MJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
137 lb 4 holes 5/8-11UNC
62 kg 4xØ18xØ200
137 lb 4xØ18xØ200
62 kg 4 holes 5/8-11UNC
274 lb
124 kg

Galvanized
Steel:
4xM16 Bolts
4xM16 Nuts
4x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø8.46 (Ø215)
Ø9.25 (Ø235)

UNIT 1

Unit
Shed ID
TR312
SC907
TR312
SC907

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

202
198

(5131)
(5030)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

800
800
20000
40000
60000

(3558)
(3558)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1210
455
1050

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)

18°

R 0.19 (5)

Ø8.46 (Ø215)

1.39 (43)

10°
Ø6.22 (Ø158)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

1.77 (45)

DWG. No.: H21313EJ DWG: TYPE SALES Date: 2015/07/22

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 316

EUROPE

BIL 1050 kV

316HT1050

in (mm)
TITLE

STATION POST INSULATOR. HIGH STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.22 (Ø158)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
316HT1050
TR316
SC924 (Unit 1)
SC914 (Unit 2)

(21 Sheds) 46.0 (1168.5)

Ø8.98 (Ø228)

UNIT 1

92.0 ±0.13 (2337 ±3.2)

Ø8.86 (Ø225)

(21 Sheds) 46.0 (1168.5)

Ø9.41 (Ø239)

UNIT 2

S2924EJ

UNIT 2

S4914MJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
155 lb 4 holes 5/8-11UNC
70 kg 4xØ18xØ225
183 lb 4xØ18xØ225
83 kg 4 holes 5/8-11UNC
338 lb
153 kg

Galvanized
Steel:
4xM16 Bolts
4xM16 Nuts
4x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø8.98 (Ø228)

Ø10.24 (Ø260)

UNIT 1

Unit
Shed ID
TR316
SC924
TR316
SC914

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

202
198

(5131)
(5030)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1250
25000
90000
75000

(5560)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1210
455
1050

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.
Shed Profile (Unit 1,2)

18°

R 0.19 (5)

Ø9.41 (Ø239)

1.39 (43)

10°
Ø6.3 (Ø160)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

1.77 (45)

DWG. No.: H21316EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 316 U

EUROPE

BIL 1050 kV

316HU1050

in (mm)
TITLE

STATION POST INSULATOR. HIGH STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.3 (Ø160)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
316HU1050
TR316
SC914

(21 Sheds) 46.0 (1168.5)

Ø9.41 (Ø239)

UNIT 1

92.0 ±0.13 (2337 ±3.2)

Ø8.86 (Ø225)

(21 Sheds) 46.0 (1168.5)

Ø9.41 (Ø239)

UNIT 2

S3914MJ

UNIT 2

S4914MJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
183 lb 4 holes 5/8-11UNC
83 kg 4xØ18xØ225
183 lb 4xØ18xØ225
83 kg 4 holes 5/8-11UNC
366 lb
166 kg

Galvanized
Steel:
4xM16 Bolts
4xM16 Nuts
4x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø9.41 (Ø239)
Ø10.24 (Ø260)

UNIT 1

Unit
Shed ID
TR316
SC914
TR316
SC914

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

202
198

(5131)
(5030)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1250
1250
25000
90000
75000

(5560)
(5560)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1210
455
1050

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)

18°

R 0.19 (5)

Ø9.41 (Ø239)

1.39 (43)

10°
Ø6.3 (Ø160)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

1.77 (45)

DWG. No.: H21317EJ DWG: TYPE SALES Date: 2015/07/07

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 324

EUROPE

BIL 1300 kV

324ST1300

in (mm)
TITLE

STATION POST INSULATOR. STANDARD STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.22 (Ø158)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
324ST1300
TR324
SC905 (Unit 1)
SC915 (Unit 2)

(25 Sheds) 53.15 (1350)

Ø8.46 (Ø215)

106.0 ±0.16 (2692 ±4)

Ø8.86 (Ø225)

(28 Sheds) 52.83 (1342)

Ø9.06 (Ø230)

UNIT 2

UNIT 2

SJ915EJ

Total Weight:

234
231

(5944)
(5867)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1000
25000
90000
75000

(4448)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1410
525
1300

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

R 0.19 (5)
18°

Ø9.06 (Ø230)

10°

1.77 (45)

Ø6.3 (Ø160)

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

4xM16 Bolts
4xM16 Nuts
4xB16 Washers

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

R 0.19 (5)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Galvanized
Steel:

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø8.46 (Ø215)
Ø10.43 (Ø265)

SJ905PJ

Assembly:
Fixation:
Weight:
Top / Bottom
166 lb 4 holes 5/8-11UNC
75 kg 4xØ18xØ225
201 lb 4xØ18xØ225
91 kg 4 holes 5/8-11UNC
367 lb
166 kg

18°
1.53 (39)

UNIT 1

UNIT 1

Unit
Shed ID
TR324
SC905
TR324
SC915

1.57 (40)

1.77 (45)
Shed Profile (Unit 1)

10°

Shed Profile (Unit 2)

Bottom Flange View
DWG. No.: H21324EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 324 U

EUROPE

BIL 1300 kV

324SU1300

in (mm)
TITLE

STATION POST INSULATOR. STANDARD STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.3 (Ø160)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
324SU1300
TR324
SC915

(28 Sheds) 53.15 (1350)

Ø9.06 (Ø230)

UNIT 1

Ø10.43 (Ø265)
Ø8.86 (Ø225)

(28 Sheds) 52.83 (1342)

Ø9.06 (Ø230)

UNIT 2

SW915EJ

UNIT 2

SJ915EJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
201 lb 4 holes 5/8-11UNC
91 kg 4xØ18xØ225
201 lb 4xØ18xØ225
91 kg 4 holes 5/8-11UNC
367 lb
166 kg

Galvanized
Steel:
4xM16 Bolts
4xM16 Nuts
4x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

106.0 ±0.16 (2692 ±4)

Ø9.06 (Ø230)

UNIT 1

Unit
Shed ID
TR324
SC915
TR324
SC915

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

238
231

(6045)
(5867)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1000
1000
25000
90000
75000

(4448)
(4448)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1410
525
1300

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

R 0.19 (5)
18°
1.53 (39)

Ø9.06 (Ø230)

Ø6.3 (Ø160)

10°

1.57 (40)
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Shed Profile

Bottom Flange View
DWG. No.: H21325EJ DWG: TYPE SALES Date: 2015/07/07

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 330 U

EUROPE

BIL 1470 kV

330SU1470

in (mm)
TITLE

STATION POST INSULATOR. STANDARD STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.3 (Ø160)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
330SU1470
TR330
SC916

(27 Sheds) 61.0 (1549.5)

Ø9.53 (Ø242)

UNIT 1

128.0 ±0.19 (3099 ±4.8)

Ø8.86 (Ø225)

(27 Sheds) 61.0 (1549.5)

Ø9.53 (Ø242)

UNIT 2

SM916PJ

UNIT 2

SN916PJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
230 lb 4 holes 5/8-11UNC
104 kg 4xØ18xØ225
230 lb 4xØ18xØ225
104 kg 4 holes 5/8-11UNC
460 lb
208 kg

Galvanized
Steel:
4xM16 Bolts
4xM16 Nuts
4x washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø9.53 (Ø242)
Ø10.24 (Ø260)

UNIT 1

Unit
Shed ID
TR330
SC916
TR330
SC916

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

267
264

(6782)
(6706)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

900
900
25000
90000
75000

(4003)
(4003)
(111200)
(10170)
(333600)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1610
590
1470

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)

18°

R 0.19 (5)

Ø9.53 (Ø242)

1.92 (49)

10°
Ø6.3 (Ø160)

Ø5.0 (Ø127)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

1.77 (45)

DWG. No.: H21330EJ DWG: TYPE SALES Date: 2015/07/07

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 362 U

EUROPE

BIL 1050 kV

Top Flange View

in (mm)
TITLE

STATION POST INSULATOR. EXTRA HIGH STRENGTH

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)

Marks

Ø8.66 (Ø220)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
362EU1050
TR362
SC8923 (UNIT1)
SC918 (UNIT2)

(21 Sheds) 46.0 (1168.5)

Ø10.24 (Ø260)

UNIT 1

92.0 ±0.13 (2337±3.2)

Ø11.42 (Ø290)
Ø10.0 (Ø254)

(21 Sheds) 46.0 (1168.5)

Ø10.43 (Ø265)

UNIT 1
UNIT 2

Unit
Shed ID
TR362
S28923EJ
SC8923
TR362
S4918EJ
SC918
Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
256 lb 4 holes 3/4-10UNC
116 kg 8xØ18xØ254
265 lb 8xØ18xØ254
120 kg 4 holes 3/4-10UNC
521 lb
236 kg

Galvanized
Steel:
8xM16 Bolts
8xM16 Nuts
8x washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø10.24 (Ø260)

UNIT 2

362EU1050

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

202
198

(5131)
(5030)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

2300
2300
40000
120000
100000

(10230)
(10230)
(177920)
(13560)
(444800)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1210
455
1050

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

146
500

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)

18°

R 0.19 (5)

Ø10.43 (Ø265)

1.69 (43)

10°
Ø8.66 (Ø220)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

1.77 (45)

DWG. No.: H21362EJ DWG: TYPE SALES Date: 2015/07/07

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 367

EUROPE

BIL 1300 kV

367HT1300

in (mm)
TITLE

STATION POST INSULATOR. HIGH STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.22 (Ø158)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
367HT1300
TR367
SC905 (Unit 1)
SC902 (Unit 2)

(25 Sheds) 53.15 (1350)

Ø8.46 (Ø215)

106.0 ±0.16 (2692 ±4)

Ø10.0 (Ø254)

(28 Sheds) 52.83 (1342)

Ø10.04 (Ø255)

UNIT 2

UNIT 2

SJ902MJ

Total Weight:

234
231

(5944)
(5867)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1450
20000
40000
60000

(6450)
(88960)
(4250)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1410
525
1300

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

R 0.19 (5)
18°

Ø10.04 (Ø255)

10°

1.77 (45)

Ø8.66 (Ø220)

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

8xM16 Bolts
8xM16 Nuts
8x Washers

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

R 0.19 (5)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)

Galvanized
Steel:

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø8.46 (Ø215)
Ø11.42 (Ø290)

SJ905MJ

Assembly:
Fixation:
Weight:
Top / Bottom
166 lb 4 holes 5/8-11UNC
75 kg 8xØ18xØ254
285 lb 8xØ18xØ254
129 kg 4 holes 3/4-10UNC
451 lb
204 kg

18°
1.53 (39)

UNIT 1

UNIT 1

Unit
Shed ID
TR367
SC905
TR367
SC902

1.57 (40)

1.77 (45)
Shed Profile (Unit 1)

10°

Shed Profile (Unit 2)

Bottom Flange View
DWG. No.: H21367EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 368

EUROPE

BIL 1300 kV

in (mm)
TITLE

368EU1300

STATION POST INSULATOR. EXTRA HIGH STRENGTH

Top Flange View
4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)

Marks

Ø8.66 (Ø220)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
368EU1300
TR368
SC8922 (Unit 1)
SC903 (Unit 2)

(28 Sheds) 53.15 (1350)

Ø10.04 (Ø255)

UNIT 1

Ø11.42 (Ø290)
Ø10.0 (Ø254)

(27 Sheds) 52.83 (1342)

Ø10.43 (Ø265)

UNIT 2

UNIT 2

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
296 lb 4 holes 3/4-10UNC
134 kg 8xØ18xØ255
302 lb 8xØ18xØ255
137 kg 4 holes 3/4-10UNC
598 lb
271 kg

Galvanized
Steel:
8xM16 Bolts
8xM16 Nuts
8x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

106.0 ±0.16 (2692 ±4)

Ø10.04 (Ø255)

UNIT 1

Unit
Shed ID
TR368
S28922EJ
SC8922
TR368
S2903MJ
SC903

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

234
231

(5944)
(5867)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

2050
2050
40000
120000
100000

(9118)
(9118)
(177920)
(13560)
(444880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1410
525
1300

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.
Shed Profile (Unit 1,2)
R 0.19 (5)

Ø10.43 (Ø265)

1.53 (39)

18°

Ø8.66 (Ø220)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

10°

1.57 (40)

Bottom Flange View
DWG. No.: H21368EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 369

EUROPE

BIL 1300 kV

in (mm)
TITLE

369ET1300

STATION POST INSULATOR. EXTRA HIGH STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.69 (Ø170)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
369ET1300
TR369
SC902 (Unit 1)
SC903 (Unit 2)

(28 Sheds) 53.15 (1350)

Ø10.04 (Ø255)

UNIT 1

Ø11.42 (Ø290)
Ø10.0 (Ø254)

(27 Sheds) 52.83 (1342)

Ø10.43 (Ø265)

UNIT 2

UNIT 2

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
278 lb 4 holes 5/8-11UNC
126 kg 8xØ18xØ254
302 lb 8xØ18xØ254
137 kg 4 holes 3/4-10UNC
580 lb
263 kg

Galvanized
Steel:
8xM16 Bolts
8xM16 Nuts
8x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE
OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

106.0 ±0.16 (2692 ±4)

Ø10.04 (Ø255)

UNIT 1

Unit
Shed ID
TR369
S26902EJ
SC6902
TR369
S26903EJ
SC6903

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

234
231

(5944)
(5867)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

2050
20000
40000
60000

(9118)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1410
525
1300

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)
R 0.19 (5)

Ø10.43 (Ø265)

1.53 (39)

18°

Ø8.66 (Ø220)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

10°

1.57 (40)

Bottom Flange View
DWG. No.: H21369EJ DWG: TYPE SALES Date: 2015/05/28

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 371

EUROPE

BIL 1470 kV

Top Flange View
Ø5.0 (Ø127)

TITLE

STATION POST INSULATOR. HIGH STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Marks

Ø6.22 (Ø158)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
371HT1470
TR371
SC911 (UNIT1)
SC919 (UNIT2)

(27 Sheds) 61.0 (1549.5)

Ø8.78 (Ø223)

UNIT 1

128.0 ±0.19 (3099±4.8)

Ø10.24 (Ø260)

Ø8.86 (Ø225)

(28 Sheds) 61.0 (1549.5)

Ø9.72 (Ø247)

UNIT 1

SL911MJ

UNIT 2

S2919EJ

Unit
Shed ID
TR371
SC911
TR371
SC919

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
194 lb 4 holes 5/8-11UNC
88 kg 4xØ18xØ225
267 lb 4xØ18xØ225
121 kg 4 holes 3/4-10UNC
461 lb
209 kg

4xM16 Bolts
4xM16 Nuts
4x washers

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

270
264

(6858)
(6706)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1170
20000
40000
60000

(5204)
(88960)
(4520)
(266800)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1610
590
1470

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

R 0.19 (5)

R 0.19 (5)
18°

1.92 (49)

10°

Ø8.66 (Ø220)

18°
1.77 (45)

Ø9.72 (Ø247)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)

Bottom Flange View

Shed Profile (Unit 1)

DWG. No.: H21371EJ DWG: TYPE SALES Date: 2015/07/07

10°

1.77 (45)

1.77 (45)

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Galvanized
Steel:

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø8.78 (Ø223)

UNIT 2

371HT1470

in (mm)

Shed Profile (Unit 2)

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 372

EUROPE

BIL 1470 kV

Top Flange View

in (mm)
TITLE

STATION POST INSULATOR. EXTRA HIGH STRENGTH

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)

Marks

Ø8.66 (Ø220)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
372EU1470
TR372
SC921 (UNIT1)
SC920 (UNIT2)

(28 Sheds) 61.0 (1549.5)

Ø10.24 (Ø260)

UNIT 1

128.0 ±0.19 (3099±4.8)

Ø11.42 (Ø290)
Ø10.0 (Ø254)

(28 Sheds) 61.0 (1549.5)

Ø10.32 (Ø262)

UNIT 1
UNIT 2

Unit
Shed ID
TR372
S28921EJ
SC921
TR372
S2920MJ
SC920
Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
322 lb 4 holes 3/4-10UNC
146 kg 8xØ18xØ254
309 lb 8xØ18xØ254
140 kg 4 holes 3/4-10UNC
631 lb
286 kg

Galvanized
Steel:
8xM16 Bolts
8xM16 Nuts
4x washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE OR
SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø10.0 (Ø254)

UNIT 2

372EU1470

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

271
264

(6883)
(6706)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
CANTILEVER BREAKING STRENGTH,UNDERHUNG pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1750
1750
20000
40000
60000

(7784)
(7784)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1610
590
1470

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

Shed Profile (Unit 1,2)

18°

R 0.19 (5)

1.92 (49)

10°
Ø8.66 (Ø220)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

1.77 (45)

DWG. No.: H21372EJ DWG: TYPE SALES Date: 2015/07/07

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 373

EUROPE

BIL 1470 kV

Top Flange View
Ø5.0 (Ø127)

TITLE

STATION POST INSULATOR. EXTRA HIGH STRENGTH

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Marks

Ø6.3 (Ø160)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
373ET1470
TR373
SC916 (UNIT1)
SC920 (UNIT2)

(27 Sheds) 61.0 (1549.5)

Ø9.53 (Ø242)

UNIT 1

128.0 ±0.19 (3099±4.8)

Ø11.42 (Ø290)

Ø10.0 (Ø254)

(28 Sheds) 61.0 (1549.5)

Ø10.32 (Ø262)

UNIT 1

SP916PJ

UNIT 2

S2920EJ

Unit
Shed ID
TR373
SC916
TR373
SC920

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
234 lb 4 holes 5/8-11UNC
106 kg 8xØ18xØ254
309 lb 8xØ18xØ254
140 kg 4 holes 3/4-10UNC
543 lb
246 kg

Galvanized
Steel:
8xM16 Bolts
8xM16 Nuts
4x washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø9.53 (Ø242)

UNIT 2

373ET1470

in (mm)

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

269
264

(6833)
(6706)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1750
20000
40000
60000

(7784)
(88960)
(4520)
(266800)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1610
590
1470

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

220
1000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

R 0.19 (5)

R 0.19 (5)
18°

Ø8.66 (Ø220)

1.77 (45)

1.92 (49)

10°

18°

1.77 (45)

1.77 (45)
4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

Bottom Flange View

Shed Profile (Unit 1)

DWG. No.: H21373EJ DWG: TYPE SALES Date: 2015/07/07

10°

Shed Profile (Unit 2)

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

PART NUMBER

CERISOL

TR 379

EUROPE

BIL 1550 kV

379HT1550

in (mm)
TITLE

STATION POST INSULATOR. HIGH STRENGTH

Top Flange View
4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

Ø6.3 (Ø160)

Unit
Part n°

CERISOL
EUROPE

Year-month
Serial number
379HT1550
TR379
SC916 (Unit 1)
SC917 (Unit 2)

(27 Sheds) 64.0 (1625.5)

Ø9.53 (Ø242)

UNIT 1

Ø11.42 (Ø290)
Ø10.0 (Ø254)

(31 Sheds) 64.0 (1625.5)

Ø10.32 (Ø262)

UNIT 2

SL916MJ

UNIT 2

S2917EJ

Total Weight:

Assembly:
Fixation:
Weight:
Top / Bottom
230 lb 4 holes 5/8-11UNC
104 kg 8xØ18xØ254
329 lb 8xØ18xØ254
149 kg 4 holes 3/4-10UNC
559 lb
253 kg

Galvanized
Steel:
8xM16 Bolts
8xM16 Nuts
8x Washers

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153,
MALLEABLE OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

128.0 ±0.19 (3251 ±4.8)

Ø9.53 (Ø242)

UNIT 1

Unit
Shed ID
TR379
SC916
TR379
SC917

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

284
280

(7214)
(7112)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1700
20000
40000
60000

(7562)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

1710
620
1550

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

318
2000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.

R 0.19 (5)

R 0.19 (5)
18°

1.92 (49)

Ø8.66 (Ø220)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø7.0 (Ø178)
NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

10°

18°
1.69 (43)

Ø10.83 (Ø275)

1.77 (45)

1.77 (45)
Shed Profile (Unit 1)

10°

Shed Profile (Unit 2)

Bottom Flange View
DWG. No.: H21379EJ DWG: TYPE SALES Date: 2015/07/01

DWN: A.MEJÍA A.

APP: C. JARAMILLO

Technical reference number:

TR 391

EUROPE

BIL 1800 kV

in (mm)
TITLE

391ST1800

STATION POST INSULATOR. STANDARD STRENGTH

"T"
Top Flange View "T"

Ø10.43 (Ø265)

4 Tapped Holes 5/8-11 UNC
+0.015 Oversize
Full Thread 0.87 (22)

Ø5.0 (Ø127)

Marks

(23 Sheds) 50.67 (1287.0)

UNIT 1

Ø10.43 (Ø265)
Ø11.42 (Ø290)

EUROPE

Year-month
Serial number
391ST1800
TR391
SC6900 (Unit 1,2)
SC6901 (Unit 3)

Ø10.0 (Ø254)

(22 Sheds) 50.67 (1287)

Ø10.83 (Ø275)

UNIT 3

152.0 ±0.22 (3861 ±5.6)

(23 Sheds) 50.67 (1287)

Ø11.42 (Ø290)

UNIT 2
UNIT 3

Assembly:
Fixation:
Top / Bottom
267 lb 4 holes 5/8-11UNC
121 kg 8xØ18xØ254
274 lb 8xØ18xØ254
124 kg 8xØ18xØ254
291 lb 8xØ18xØ254
132 kg 4 holes 3/4-10UNC
832 lb
377 kg

Weight:

NOT E: TO PURCHASER ALL SALES OF
GAMMA PRODUCTS ARE SUBJECT TO
OUR STANDARD TERMS AND
CONDITIONS AND THE LIMITED
WARRANTIES THEREUNDER

330
321.5

(8382)
(8166)

MECHANICAL VALUES
CANTILEVER BREAKING STRENGTH,UPRIGHT pounds (N)
TENSILE BREAKING STRENGTH, pounds (N)
TORSIONAL BREAKING STRENGTH, in-pounds (N.m)
COMPRESSION BREAKING STRENGTH, pounds (N)

1400
20000
40000
60000

(6227)
(88960)
(4520)
(266880)

ELECTRICAL VALUES
GUARANTEED VOLTAGES:
CRITICAL IMPULSE FLASHOVER, POS., kV
LOW FREQUENCY WET WITHSTAND, kV
IMPULSE WITHSTAND, kV

2000
710
1800

RADIO INFLUENCE VOLTAGE
TEST VOLTAGE, RMS TO GROUND, kV
MAXIMUM RIV AT 1 MHz, µV

318
2000

Other characteristics:
Insulating material:
Glaze:

Al. Porcelain
Light Gray Munsell n° 70

Metal parts assembled with Portland cement.
Bolts required for stack assembly are supplied.
R 0.19 (5)
18°

Bottom Flange View "B"
Ø7.0 (Ø178)

4 Tapped Holes 3/4-10 UNC
+0.015 Oversize
Full Thread 0.87 (22)
"B"

16xM16 Bolts
16xM16 Nuts
16x Washers

DIMENSIONS
NOMINAL LEAKAGE DISTANCE, In (mm)
MINIMUM LEAKAGE DISTANCE; In (mm)

Ø10.83 (Ø275)

Ø8.66 (Ø220)

Galvanized
Steel:

NOTES
1. DIMENSIONS ARE INCHES (MILLIMETERS)
2. ALL FERROUS PARTS ARE HOT DIP GALVANIZED PER ASTM A153, MALLEABLE
OR SPHEROIDAL CAST IRON.
3. MEETS CHARACTERISTICS AND TOLERANCES OF ANSI C29.9 / C29.1

Ø10.43 (Ø265)

Ø10.43 (Ø265)

UNIT 1

Total Weight:

Ø10.0 (Ø254)

UNIT 2

Unit
Shed ID
TR391
S26900EJ
SC6900
TR391
S36900EJ
SC6900
TR391
S26901EJ
SC6901
Unit
Part n°

CERISOL

DWG. No.: H21391EJ DWG: TYPE SALES Date: 2015/07/01

1.77 (45)

Ø6.69 (Ø170)

PART NUMBER

CERISOL

10°

1.77 (45)
Shed Profile
(Unit 1,2,3)
DWN: A.MEJÍA A.

APP: C. JARAMILLO

Date: March 08, 2008
CERTIFICATE OF TESTING
MATERIAL TESTED: GAMMA STATION POST Insulator. TR 202

DESIGN TESTS
1.

LOW FREQUENCY WET WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.5 of ANSI C29.1-1982.
Failure of any insulator to meet the rated wet withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
30

Low Frequency Wet Withstand, kV

Unit 2
30

Unit 3
30

Rating
30

Result: Satisfactory

2.

CRITICAL IMPULSE FLASHOVER, POSITIVE

Three insulators were randomly selected and tested in accordance with section 4.7 of ANSI C29.1-1982.
Failure of the average critical – impulse flashover value of the three insulators to equal or exceed 92
percent of the rated critical – impulse flashover value, as given in the applicable table, shall constitute
failure to meet the requirements of the standard.

Critical Impulse Flashover, Positive, kV

Unit 1
120,7

Unit 2
119,6

Unit 3
120,9

Average Rating
120,4
105

92%
96.6

Result: Satisfactory

3.

IMPULSE WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.8 of ANSI C29.1-1982.
Failure of any insulator to meet the rated impulse withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
95

Impulse Withstand, kV

Unit 2
95

Unit 3
95

Rating
95

Result: Satisfactory

4.

RADIO INFLUENCE VOLTAGE RIV

Three insulators were randomly selected and tested in accordance with section 4.9 of ANSI C29.1-1982.
If one or more insulators fail to meet the requirements given in the standard, three additional insulators
shall be selected at random and tested. Failure of one or more of these additional insulators shall
constitute failure to meet the requirements of this standard.

RIV at 5 kV, to ground (μV)
Result: Satisfactory
.

Unit 1

Unit 2

<2,5V

<2,5V

Unit 3
<2,5V

Rating
max
50 V

5.

THERMAL SHOCK TEST

Three insulators were randomly selected and tested for ten complete cycles in
accordance with section 5.5 of ANSI C29.1-1982. The temperature of the hot
water bath was approximately 150°F (66°C) and the temperature of the cold
water was approximately 39°F (4°C). At the end of the tenth cycle the test
specimens were checked for electrical soundness. If one insulator fails, three additional insulators shall
be selected randomly and tested. Failure of more than one insulator from the first set of samples, or from
the first and second set of samples combined shall constitute failure to meet the requirements of this
standard.
Three insulators were thermal shock tested in accordance to ANSI Standard, section 5.5.
All units passed this test.
Result: Satisfactory

6.

COMPRESSION STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.4 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement where applicable, or failure of any one
insulator unit to equal 85% of that strength requirement shall constitute failure to meet the requirements
of this standard.

Compression Strength, pounds (*)

Unit 1
Unit 2
225.496 226.202

Unit 3
224.941

Average
225.546

Rating
10.000

85%
8500

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

7.

TORSIONAL STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.2 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to meet the requirements of
this standard.

Torsional Strength, inches pounds

Unit 1
20.116

Unit 2
21.586

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
26.118

Average
22.607

Rating
6.000

85%
5100

QUALITY CONFORMANCE TESTS
1. VISUAL AND DIMENSIONAL TEST
Three insulators were randomly selected and checked according to section 4.2 of the standard and met
the requirements. Their dimensions were verified against the manufacturing drawing.
Failure of more than one of these insulators to conform to the dimensions on the drawing shall constitute
failure of the lot to meet the requirements of the standard.
All the samples meet the conditions and dimensions.
Result: Satisfactory

2. POROSITY TEST
Ten samples of porcelain taken from the same firing cycle as these posts were subjected to the porosity
test. No porosity was observed. The test was performed in accordance with ANSI C29.9-1983, paragraph
7.3.2.
Dyer penetration:
NEGATIVE: X

POSITIVE:

Result: Satisfactory

3. GALVANIZING TEST
A galvanizing thickness test was performed on three hardware samples. The galvanizing thickness
measured, equaled or exceeded the values given in the table shown in paragraph 7.3.3 of ANSI C29.91983.
Result: Satisfactory

4. CANTILEVER STRENGTH TEST
Three insulators were randomly selected and tested in accordance with section 5.1.4.1 of ANSI C29.11982. The units were tested individually. Failure of the average strength of the three insulators to meet
the strength requirements given in the tables or to meet the specified higher strength requirement, where
applicable, or failure of any insulator to equal 85% of that strength requirement shall constitute failure to
meet the requirements of this standard.

Cantilever Strength, pounds

Unit 1
5.985

Unit 2
5.806

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
5.995

Average
5.929

Rating
2000

85%
1700

5. TENSILE STRENGTH TEST
Three insulators were randomly selected and tested in accordance with section
5.1.4.3 of ANSI C29.1-1982. Failure of the average strength of the three
insulators to meet the strength requirements given in the tables or to meet the
specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to meet the requirements of
this standard.

Tensile Strength, pounds (*)

Unit 1
30.007

Unit 2
27.028

NOTE: (*) Load released with no visible damage to the unit

Result: Satisfactory

FRANK ESCOBAR OBANDO
PRODUCT ENGINEER.

.

Unit 3
27.912

Average
28.316

Rating
7000

85%
5950

Date: March 08, 2008
CERTIFICATE OF TESTING
MATERIAL TESTED: GAMMA STATION POST Insulator. TR 205

DESIGN TESTS
1.

LOW FREQUENCY WET WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.5 of ANSI C29.1-1982.
Failure of any insulator to meet the rated wet withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
45

Low Frequency Wet Withstand, kV

Unit 2
45

Unit 3
45

Rating
45

Result: Satisfactory

2.

CRITICAL IMPULSE FLASHOVER, POSITIVE

Three insulators were randomly selected and tested in accordance with section 4.7 of ANSI C29.1-1982.
Failure of the average critical – impulse flashover value of the three insulators to equal or exceed 92
percent of the rated critical – impulse flashover value, as given in the applicable table, shall constitute
failure to meet the requirements of the standard.

Critical Impulse Flashover, Positive, kV

Unit 1
150,7

Unit 2
142,1

Unit 3
145,1

Average Rating
146,0
125

92%
115

Result: Satisfactory

3.

IMPULSE WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.8 of ANSI C29.1-1982.
Failure of any insulator to meet the rated impulse withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
110

Impulse Withstand, kV

Unit 2
110

Unit 3
110

Rating
110

Result: Satisfactory

4.

RADIO INFLUENCE VOLTAGE RIV

Three insulators were randomly selected and tested in accordance with section 4.9 of ANSI C29.1-1982.
If one or more insulators fail to meet the requirements given in the standard, three additional insulators
shall be selected at random and tested. Failure of one or more of these additional insulators shall
constitute failure to meet the requirements of this standard.

RIV at 10 kV, to ground (μV)

Unit 1
<2,5V

Result: Satisfactory

.

Unit 2
<2,5V

Unit 3
<2,5V

Rating
50 V max

5.

THERMAL SHOCK TEST

Three insulators were randomly selected and tested for ten complete cycles in
accordance with section 5.5 of ANSI C29.1-1982. The temperature of the hot
water bath was approximately 150°F (66°C) and the temperature of the cold
water was approximately 39°F (4°C). At the end of the tenth cycle the test
specimens were checked for electrical soundness. If one insulator fails, three additional insulators shall
be selected randomly and tested. Failure of more than one insulator from the first set of samples, or from
the first and second set of samples combined shall constitute failure to meet the requirements of this
standard.
Three insulators were thermal shock tested in accordance to ANSI Standard, section 5.5. All
units passed this test.
Result: Satisfactory

6.

COMPRESSION STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.4 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement where applicable, or failure of any one
insulator unit to equal 85% of that strength requirement shall constitute failure to meet the requirements
of this standard.

Compression Strength, pounds (*)

Unit 1
Unit 2
225.406 226.056

Unit 3
224.770

Average
225.411

Rating
10.000

85%
8500

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

7.

TORSIONAL STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.2 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to meet the requirements of
this standard.

Torsional Strength, inches pounds

Unit 1
19.418

Unit 2
20.716

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
21.529

Average
20.554

Rating
7.000

85%
5950

QUALITY CONFORMANCE TESTS
1. VISUAL AND DIMENSIONAL TEST
Three insulators were randomly selected and checked according to section 4.2 of the standard and met
the requirements. Their dimensions were verified against the manufacturing drawing.
Failure of more than one of these insulators to conform to the dimensions on the drawing shall constitute
failure of the lot to meet the requirements of the standard.
All the samples meet the conditions and dimensions.
Result: Satisfactory

2. POROSITY TEST
Ten samples of porcelain taken from the same firing cycle as these posts were subjected to a porosity
test. No porosity was observed. The test was performed in accordance with ANSI C29.9-1983, paragraph
7.3.2.
Dyer penetration:
NEGATIVE: X

POSITIVE:

Result: Satisfactory

3. GALVANIZING TEST
A galvanizing thickness test was performed on three hardware samples. The galvanizing thickness
measured, equaled or exceeded the values given in the table shown in paragraph 7.3.3 of ANSI C29.91983.
Result: Satisfactory

4. CANTILEVER STRENGTH TEST
Three insulators were randomly selected and tested according to section 5.1.4.1 of ANSI C29.1-1982.
The units were tested individually. Failure of the average strength of the three insulators to meet the
strength requirements given in the tables or to meet the specified higher strength requirement, where
applicable, or failure of any insulator to equal 85% of that strength requirement shall constitute failure to
meet the requirements of this standard.

Cantilever Strength, pounds

Unit 1
4.239

Unit 2
4.781

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
4.162

Average
4.394

Rating
2000

85%
1700

5. TENSILE STRENGTH TEST
Three insulators were randomly selected and tested in accordance with section
5.1.4.3 of ANSI C29.1-1982. Failure of the average strength of the three
insulators to meet the strength requirements given in the tables or to meet the
specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to meet the requirements of
this standard

Tensile Strength, pounds (*)

Unit 1
23.692

Unit 2
25.763

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

FRANK ESCOBAR OBANDO
PRODUCT ENGINEER.

.

Unit 3
26.058

Average
25.171

Rating
8500

85%
7225

Date: March 08, 2008
CERTIFICATE OF TESTING
MATERIAL TESTED: GAMMA STATION POST Insulator TR 208

DESIGN TESTS
1.

LOW FREQUENCY WET WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.5 of ANSI C29.1-1982.
Failure of any insulator to meet the rated wet withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
60

Low Frequency Wet Withstand, kV

Unit 2
60

Unit 3
60

Rating
60

Result: Satisfactory

2.

CRITICAL IMPULSE FLASHOVER, POSITIVE

Three insulators were randomly selected and tested in accordance with section 4.7 of ANSI C29.1-1982.
Failure of the average critical – impulse flashover value of the three insulators to equal or exceed 92
percent of the rated critical – impulse flashover value, as given in the applicable table, shall constitute
failure to meet the requirements of the standard.

Critical Impulse Flashover, Positive, kV

Unit 1
171,9

Unit 2
174,4

Unit 3
175,5

Average Rating
173,9
170

92%
156.4

Result: Satisfactory

3.

IMPULSE WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.8 of ANSI C29.1-1982.
Failure of any insulator to meet the rated impulse withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
151

Impulse Withstand, kV

Unit 2
150

Unit 3
151

Rating
150

Result: Satisfactory

4.

RADIO INFLUENCE VOLTAGE RIV

Three insulators were randomly selected and tested in accordance with section 4.9 of ANSI C29.1-1982.
If one or more insulators fail to meet the requirements given in the standard, three additional insulators
shall be selected at random and tested. Failure of one or more of these additional insulators shall
constitute failure to meet the requirements of this standard.
Unit 1
<2,5V

RIV at 15 kV, to ground (μV)
Result: Satisfactory

.

Unit 2
<2,5V

Unit 3
<2,5V

Rating
100 V max

5.

THERMAL SHOCK TEST

Three insulators were randomly selected and tested for ten complete cycles in
accordance with section 5.5 of ANSI C29.1-1982. The temperature of the hot
water bath was approximately 150°F (66°C) and the temperature of the cold
water was approximately 39°F (4°C). At the end of the tenth cycle the test
specimens were checked for electrical soundness. If one insulator fails, three additional insulators shall
be selected randomly and tested. Failure of more than one insulator from the first set of samples, or from
the first and second set of samples combined shall constitute failure to meet the requirements of this
standard.
Three insulators were thermal shock tested in accordance to ANSI Standard, section 5.5.
All units passed this test.
Result: Satisfactory

6.

COMPRESSION STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.4 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement where applicable, or failure of any one
insulator unit to equal 85% of that strength requirement shall constitute failure to meet the requirements
of this standard.

Compression Strength, pounds (*)

Unit 1
Unit 2
225.480 225.570

Unit 3
225.795

Average
225.615

Rating
10000

85%
8500

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

7.

TORSIONAL STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.2 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to meet the requirements of
this standard.

Torsional Strength, inches pounds

Unit 1
21.232

Unit 2
24.023

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
25.311

Average
23.522

Rating
8000

85%
6800

QUALITY CONFORMANCE TESTS
1. VISUAL AND DIMENSIONAL TEST
Three insulators were randomly selected and checked according to section 4.2 of the standard and met
the requirements. Their dimensions were checked against the dimension of manufacturing drawing
Failure of more than one of these insulators to conform to the dimensions of the drawing shall constitute
failure of the lot to meet the requirements of the standard.
All the samples meet the conditions and dimensions. Result satisfactory.
Result: Satisfactory

2. POROSITY TEST
Ten samples of porcelain taken from the same firing cycle as these posts were subjected to a porosity
test. No porosity was observed. The test was performed in accordance with ANSI C29.9-1983, paragraph
7.3.2.
Dyer penetration:
NEGATIVE: X

POSITIVE:

Result: Satisfactory

3. GALVANIZING TEST
A galvanizing thickness test was performed on three hardware samples. The galvanizing thickness
measured, equaled or exceeded the values given in the table shown in paragraph 7.3.3 of ANSI C29.91983.
Result: Satisfactory

4. CANTILEVER STRENGTH TEST
Three insulators were randomly selected and tested in accordance with section 5.1.4.1 of ANSI C29.11982. The units were tested individually. Failure of the average strength of the three insulators to meet
the strength requirements given in the tables or to meet the specified higher strength requirement, where
applicable, or failure of any insulator to equal 85% of that strength requirement shall constitute failure to
meet the requirements of this standard.

Cantilever Strength, pounds

Unit 1
3.226

Unit 2
2.641

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
2.689

Average
2.852

Rating
2000

85%
1700

5. TENSILE STRENGTH TEST
Three insulators were randomly selected and tested in accordance with section
5.1.4.3 of ANSI C29.1-1982. Failure of the average strength of the three
insulators to meet the strength requirements given in the tables or to meet the
specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to meet the requirements of
this standard.

Tensile Strength, pounds (*)

Unit 1
18.985

Unit 2
22.672

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

FRANK ESCOBAR OBANDO
PRODUCT ENGINEER.

.

Unit 3
26.324

Average
22.660

Rating
10000

85%
8500

Date: March 08, 2008
CERTIFICATE OF TESTING
MATERIAL TESTED: GAMMA STATION POST Insulator. TR 210

DESIGN TESTS
1.

LOW FREQUENCY WET WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.5 of ANSI C29.1-1982.
Failure of any insulator to meet the rated wet withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
80

Low Frequency Wet Withstand, kV

Unit 2
80

Unit 3
80

Rating
80

Result: Satisfactory

2.

CRITICAL IMPULSE FLASHOVER, POSITIVE

Three insulators were randomly selected and tested in accordance with section 4.7 of ANSI C29.1-1982.
Failure of the average critical – impulse flashover value of the three insulators to equal or exceed 92
percent of the rated critical – impulse flashover value, as given in the applicable table, shall constitute
failure to meet the requirements of the standard.

Critical Impulse Flashover, Positive, kV

Unit 1
208,1

Unit 2
211,7

Unit 3
212

Average Rating
210,6
225

92%
207

Result: Satisfactory

3.

IMPULSE WITHSTAND

Three insulators were randomly selected and tested in accordance with section 4.8 of ANSI C29.1-1982.
Failure of any insulator to meet the rated impulse withstand value, as given in the applicable table, shall
constitute failure to meet the requirements of the standard.
Unit 1
201,21

Impulse Withstand, kV

Unit 2
203,53

Unit 3
200,09

Rating
200

Result: Satisfactory

4.

RADIO INFLUENCE VOLTAGE RIV

Three insulators were randomly selected and tested in accordance with section 4.9 of ANSI C29.1-1982.
If one or more insulators fail to meet the requirements given in the standard, three additional insulators
shall be selected at random and tested. Failure of one or more of these additional insulators shall
constitute failure to meet the requirements of this standard.
Unit 1
< 2,5V

RIV at 22 kV, to ground (μV)
Result: Satisfactory

.

Unit 2
< 2,5V

Unit 3
< 2,5V

Rating
100 V max

5.

THERMAL SHOCK TEST

Three insulators were randomly selected and tested for ten complete cycles in
accordance with section 5.5 of ANSI C29.1-1982. The temperature of the hot
water bath was approximately 150°F (66°C) and the temperature of the cold
water was approximately 39°F (4°C). At the end of the tenth cycle the test
specimens were checked for electrical soundness. If one insulator fails, three additional insulators shall
be selected randomly and tested. Failure of more than one insulator from the first set of samples, or from
the first and second set of samples combined shall constitute failure to meet the requirements of this
standard.
Three insulators were thermal shock tested in accordance to ANSI Standard, section 5.5.
All units passed this test.
Result: Satisfactory

6.

COMPRESSION STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.4 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement where applicable, or failure of any one
insulator unit to equal 85% of that strength requirement shall constitute failure to meet the requirements
of this standard

Compression Strength, pounds (*)

Unit 1
Unit 2
140.757 131.166

Unit 3
215.206

Average
162.376

Rating
15000

85%
12750

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

7.

TORSIONAL STRENGTH

Three insulators were randomly selected and tested in accordance with section 5.1.4.2 of ANSI C29.11982. Failure of the average strength of the three insulators to meet the strength requirements given in
the tables or to meet the specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to meet the requirements of
this standard

Torsional Strength, inches pounds

Unit 1
25.866

Unit 2
25.799

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
25.773

Average
25.813

Rating
10000

85%
8500

QUALITY CONFORMANCE TESTS
1. VISUAL AND DIMENSIONAL TEST
Three insulators were randomly selected and checked according to section 4.2 of the standard and met
the requirements. Their dimensions were checked against the dimension of manufacturing drawing
Failure of more than one of these insulators to conform to the dimensions of the drawing shall constitute
failure of the lot to meet the requirements of the standard.
All the samples meet the conditions and dimensions. Result satisfactory.
Result: Satisfactory

2. POROSITY TEST
Ten samples of porcelain taken from the same firing cycle as these posts were subjected to a porosity
test. No porosity was observed. The test was performed in accordance with ANSI C29.9-1983, paragraph
7.3.2.
Dyer penetration:
NEGATIVE: X

POSITIVE:

Result: Satisfactory

3. GALVANIZING TEST
A galvanizing thickness test was performed on three hardware samples. The galvanizing thickness
measured, equaled or exceeded the values given in the table shown in paragraph 7.3.3 of ANSI C29.91983.
Result: Satisfactory

4. CANTILEVER STRENGTH TEST
Three insulators were randomly selected and tested in accordance with section 5.1.4.1 of ANSI C29.11982. The units were tested individually. Failure of the average strength of the three insulators to meet
the strength requirements given in the tables or to meet the specified higher strength requirement, where
applicable, or failure of any insulator to equal 85% of that strength requirement shall constitute failure to
meet the requirements of this standard.

Cantilever Strength, pounds

Unit 1
3.628

Unit 2
3.791

NOTE: (*) Load released with no visible damage to the unit
Result: Satisfactory

.

Unit 3
3.693

Average
3.704

Rating
2000

85%
1700

5. TENSILE STRENGTH TEST
Three insulators were randomly selected and tested in accordance with section
5.1.4.3 of ANSI C29.1-1982. Failure of the average strength of the three
insulators to meet the strength requirements given in the tables or to meet the
specified higher strength requirement, where applicable, or failure of any
insulator to equal 85% of that strength requirement shall constitute failure to
meet the requirements of this standard.

Tensile Strength, pounds (*)

Unit 1
40.000

Unit 2
40.000

NOTE: (*) Load released with no visible damage to the unit

Result: Satisfactory

FRANK ESCOBAR OBANDO
PRODUCT ENGINEER.

.

Unit 3
40.000

Average
40.000

Rating
12000

85%
10200

Design Test Certification
Material Tested

GAMMA Catalog Number 8435

TEST OBJECT:

Station Post Insulator

TYPE SPECIFICATION:

TR 214

TEST STANDARDS:

ANSI C29.9, ANSI C29.1, NEMA No. 107:1993

SCHEDULE OF TESTS
Design Tests, Section 7.2

Page

Test Section Description of Test

Electrical Tests
2

7.2.1

Low-frequency Wet Withstand Voltage

3

7.2.2 & 7.2.3 Critical Impulse Flashover Positive & Impulse Withstand Voltage

5

7.2.4

Radio-influence voltage tests

Mechanical Tests
6

7.2.5

Thermal shock test

7

7.2.6

Compression Strength

8

7.2.7

Torsional Strength

Quality Conformance Tests, Section 7.3
9

7.3.4

Cantilever Strength

10

7.3.5

Tensile Strength

All Electrical tests were performed per the requirements of ANSI test standard C29.9:2012, ANSI C29.1:2012, and
NEMA No. 107:1993. All Mechanical tests were performed per the requirements of ANSI test standard
C29.9 - 1983 (R1996), and ANSI C29.1 – 1988 (R2002).

Page 1 of 5

GAMMA Catalog 8435
Design Test Certification
7.2.1 Low-frequency Wet Withstand Voltage
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.1. The rated wet withstand voltage was
applied on each of the tested post insulator for 10 seconds.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Low-frequency Wet Withstand Voltage Test Results
Sample No. 1

Sample No. 2

Sample No. 3

b (in Hg)
t (°F)

29.42
65.84

29.42
65.84

29.42
65.84

r.i. (mm/min)
RW (Ωm)
VLW (kV) T
(s)
result

5.0
185.0

5.0
185.0

5.0
185.0

100
10
no flashover occurred

100
10
no flashover occurred

100
10
no flashover occurred

No flashover occurred during the test at the rated wet withstand voltage 100 kV specified by ANSI C29.9, Table 2. All test
samples met the requirements. Post type insulator TR-214, Catalog No. 8435 passed low-frequency wet withstand voltage
test according to ANSI C29.9, cl. 7.2.1.

7.2.2 & 7.2.3 Impulse Withstand Voltage Test and Flashover Voltage
The tests were carried out on the three post insulators according to ANSI C29.9, cl. 7.2.2 and 7.2.3. Three consecutive impulses
of the rated impulse-withstand value of both polarities were applied on each of tested post insulator. The critical impulse
voltages of both polarities were determined by the up and down method with 30 impulses.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Impulse Withstand Voltage and Flashover Voltage Test Results
Polarity
Test Sample No.
VIW (kV)
Impulses
Flashovers
b (in Hg)
t (°F)
Kh
Kd
VCRS LI (kV)
VCRSA LI (kV)

+

-

1

2

3

1

2

3

250
3
0
29.48
67.6

250
3
0
29.48
67.6

250
3
0
29.48
67.6

250
3
0
29.48
67.6

250
3
0
29.48
67.6

250
3
0
29.48
67.6

1.0029
1.0764

1.0029
1.0764

1.0029
1.0764

1.0029
1.0663

1.0029
1.0663

1.0029
1.0663

277

277

276

468

452

482

277

467

No flashover occurred during the test with three impulses at the rated impulse-withstand voltage 250 kV specified by
ANSI C29.9, Table 2. All test samples met the requirements. Post type insulator TR-214, C a t a l o g No. 8435 passed
impulse withstand voltage test according to ANSI C29.9, cl. 7.2.3.
The rated critical-impulse flashover voltage 280 kV is specified by ANSI C29.9, Table 2. The average values of critical-impulse
flashover voltages are higher than 92 percent of the rated critical-impulse flashover voltage, i.e. 258 kV. All test samples
met the requirements. Post type insulator TR-214, Catalog No. 843 passed critical-impulse flashover voltage test
according to ANSI C29.9, cl. 7.2.2.

Page 2 of 5

GAMMA Catalog 8435
Design Test Certification
7.2.4 Radio-influence Voltage (RIV) Test
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.4. Radio-influence voltage was measured at
the frequency 1.0 MHz in accordance with circuit diagram in Figure 3 – 3a of NEMA No. 107, Section 3.
The test arrangement was set up according to ANSI C29.1, cl. 4.9.1.

Radio-influence Voltage (RIV) Test Results
Sample No. 1
b (in Hg)
t (°F)

Sample No. 2

29,48
63,5
RIV (µV)
4
4
4
4

VT (kV)
33
30
27
0

Sample No. 3

29,48
63,5

29,48
63,5

RIV (µV)
4
4
4
4

RIV (µV)
4
4
4
4

Rated value: max. 200 µV at 30 kV/1,0 MHz
Measured values of radio-influence voltages on post insulators at test voltage 30 kV (1 MHz) are less than 200 µV specified by
ANSI C29.9, Table 2. All test samples met the requirements. Post type insulator TR-214, Catalog No. 8435 passed radioinfluence voltage test according to ANSI C29.9, cl. 7.2.4.

7.2.5 Thermal Shock Test
The test was carried out on three post insulator according to ANSI C 29.9, cl 7.2.5. Each tested post insulator was first
immersed in a hot water bath 150 °F (66 °C) for 10 minutes. Then it was withdrawn and immersed in a cold water bath
39 °F (4 °C) for 10 minutes. After tenth cycle each post insulator was tested for electrical soundness by low-frequency
momentary flashover voltage test.

Thermal Shock Test Results
10 cycles (150 °F / 10
min and 39 °F/ 10
min)

Low-frequency Momentary
Flashover Voltage Test

Flashover
voltage (kV)

Result

Test Sample No. 1

No failure

No failure

173

Passed

Test Sample No. 2

No failure

No failure

178

Passed

Test Sample No. 3

No failure

No failure

179

Passed

No failure occurred during the thermal shock test according to ANSI C29.9, cl. 7.2.5. All test samples met the requirements.
Post type insulator TR-214, Catalog No. 8435 passed thermal shock test according to ANSI C29.9, cl. 7.2.5.

Page 3 of 5

GAMMA Catalog 8435
Design Test Certification

7.2.6 Compression Strength Test
Temperature 68 -71.6 °F (20-22 °C), Minimum failing load 14,994.76 lbs. (66.70 kN). Smooth increase in load 450 - 900 lbs. /s.
(2 - 4 kN/s), smooth load up to failure, visual inspection
Compression Strength Test Results
Sample No.

Maximum failure load
lbs. (kN)

Failure Mode

7

(3012)

Sheds

Passed

8

(2035)

Sheds

Passed

9

(3012)

Ceramic core

Passed

Average

Result (MFL)

(2686)

7.2.7 Torsional Strength Test
Temperature during test + 73.4 °F (+ 23 °C), Minimum failing load (MFL) 11,948.51 lb.-in. (1.35 kNm), Smooth increase in load
265.52- 442.54 lb.-in./s (0.03 – 0.05 kNm/s), Smooth load up to failure of screws

Torsional Strength Test Results
Sample
No.

Maximum reached torsional
moment lbs. (kNm)

10

>75,231.34 (8.5)

11

> 77,001.49 (8.7)

12

> 57,529.85 (6.5)

Failure Mode
Screws failed. Insulator did not fail.
Test stopped by operator.
Screws failed. Insulator did not fail.
Test stopped by operator.
Insulator did not fail.
Test stopped by operator

Result (MFL)

Passed
Passed
Passed

7.3.4 Cantilever Strength Test
Temperature during test + 71.6 °F (+ 22 °C), Minimum failing load (MFL) 2,023.28 lbs. (9 kN), Increase in load
6.74 – 13.49 lbs. /s (0.03 - 0.06 kN/s), smoothly to failure

Cantilever Strength Test Results
Sample
No.

Maximum failing load
lbs. (kN)

1

3,214.77 (14.30)

Failed at bottom part of ceramic core

passed

2

2,203.13 (9.80)

Failed at bottom part of ceramic core

passed

3

3,012.44 (13.4)

Failed at bottom part of ceramic core

passed

Average

2,810.11 (12.5)

Page 4 of 5

Failure Mode

Result (MFL)

GAMMA Catalog 8435
Design Test Certification

7.3.5 Tensile strength
Temperature 68 – 69.8 °F (20-21 °C), Minimum failing load (MFL) 13,983.11 lbs. (62.2 kN), Increase in load 6.74 – 13.49 lbs./s
(0.3 – 0.6 kN/s), smoothly. Smooth load up to failure, visual inspection

Tensile Strength Test Results
Sample
No.

Maximum failure load
[kN]

4

20,839.79 (92.7)

Ceramic core inside of metal cap

Passed

5

36,081.84 (160.5)

Ceramic core inside of metal cap

Passed

6

28,404.61 (126.35)

Ceramic core inside of metal cap

Passed

Average

28,438.33 (126.5)

Way of failure

Result
(MFL)

Tests performed at EGU HV Laboratory a. s., Test No. 10210/A/15, and The Klockner Institute, Report No.
129/15/AL. All test results contained in this document are held on file under drawing number reference 84351011.

__________________________________
Frank Escobar
Chief Engineer, GAMMA Insulators Corporation

Page 5 of 5

Design Test Certification
Material Tested

GAMMA Catalog Number 8436

TEST OBJECT:

Station Post Insulator

TYPE SPECIFICATION:

TR 216

TEST STANDARDS:

ANSI C29.9, ANSI C29.1, NEMA No. 107:1993

SCHEDULE OF TESTS
Design Tests, Section 7.2

Page

Test Section Description of Test

Electrical Tests
2

7.2.1

Low-frequency Wet Withstand Voltage

3

7.2.2 & 7.2.3 Critical Impulse Flashover Positive & Impulse Withstand Voltage

5

7.2.4

Radio-influence voltage tests

Mechanical Tests
6

7.2.5

Thermal shock test

7

7.2.6

Compression Strength

8

7.2.7

Torsional Strength

Quality Conformance Tests, Section 7.3
9

7.3.4

Cantilever Strength

10

7.3.5

Tensile Strength

All Electrical tests were performed per the requirements of ANSI test standard C29.9:2012, ANSI C29.1:2012, and
NEMA No. 107:1993. All Mechanical tests were performed per the requirements of ANSI test standard
C29.9 - 1983 (R1996), and ANSI C29.1 – 1988 (R2002).

Page 1 of 5

GAMMA Catalog 8436
Design Test Certification
7.2.1 Low-frequency Wet Withstand Voltage
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.1. The rated wet withstand voltage was
applied on each of the tested post insulator for 10 seconds.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Low-frequency Wet Withstand Voltage Test Results
Sample No. 1
b (in Hg)
t (°F)
r.i. (mm/min)
RW (Ωm)
VLW (kV)
T (s)
Result

Sample No. 2

Sample No. 3

29.42
67.1

29.42
67.1

29.42
67.1

5.0
185.0

5.0
185.0

5.0
185.0

145
10
no flashover occurred

145
10
no flashover occurred

145
10
no flashover occurred

No flashover occurred during the test at the rated wet withstand voltage 145 kV specified by ANSI C29.9, Table 2. All test
samples met the requirements. Post type insulator TR-216, Catalog No. 8436 passed low-frequency wet withstand voltage
test according to ANSI C29.9, cl. 7.2.1.

7.2.2 & 7.2.3 Impulse Withstand Voltage Test and Flashover Voltage
The tests were carried out on the three post insulators according to ANSI C29.9, cl. 7.2.2 and 7.2.3. Three consecutive impulses
of the rated impulse-withstand value of both polarities were applied on each of tested post insulator. The critical impulse
voltages of both polarities were determined by the up and down method with 30 impulses.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Impulse Withstand Voltage and Flashover Voltage Test Results
Polarity
Test Sample No.
VIW (kV)
Impulses
Flashovers
b (in Hg)
t (°F)
Kh
Kd
VCRS LI (kV)
VCRSA LI (kV)

+
1
350
3
0

2
350
3
0

3
350
3
0

1
350
3
0

2
350
3
0

29.48
64.6

29.48
64.6

29.48
64.6

29.48
64.6

1.0088
1.0823

1.0088
1.0823

1.0088
1.0823

1.0088
1.0714

1.0088
1.0714

386

381

630

640

383
383

29.48
64.6

3
350
3
0
29.48
64.6
1.0088
1.0714
617

629

No flashover occurred during the test with three impulses at the rated impulse-withstand voltage
350 kV specified by ANSI C29.9, Table 2, All test samples met the requirements. Post type insulator TR-216, Catalog No. 8436
passed impulse withstand voltage test according to ANSI C29.9, cl. 7.2.3.
The rated critical-impulse flashover voltage 390 kV is specified by ANSI C29.9, Table 2. The average values of critical-impulse
flashover voltages are higher than 92 percent of the rated critical-impulse flashover voltage, i.e. 359 kV. All test samples
met the requirements. Post type insulator TR-216, Catalog No. 8436 passed critical-impulse flashover voltage test according
to ANSI C29.9, cl. 7.2.2.

Page 2 of 5

GAMMA Catalog 8436
Design Test Certification
7.2.4 Radio-influence Voltage (RIV) Test
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.4. Radio-influence voltage was measured at
the frequency 1.0 MHz in accordance with circuit diagram in Figure 3 – 3a of NEMA No. 107, Section 3.
The test arrangement was set up according to ANSI C29.1, cl. 4.9.1.

Radio-influence Voltage (RIV) Test Results
Sample No. 1

Sample No. 2

29.48
63.5

b (in Hg)
t (°F)

29.48
63.5

RIV (µV)

VT (kV)
48
44
40
36
0

Sample No. 3
29.48
63.5

RIV (µV)

4
4
4
4
4

RIV (µV)

4
4
4
4
4

4
4
4
4
4

Rated value: max. 200 µV at 30 kV/1,0 MHz
Measured values of radio-influence voltages on post insulators at test voltage 44 kV (1 MHz) are less than 200 µV specified by
ANSI C29.9, Table 2. All test samples met the requirements. Post type insulator TR-216, Catalog No. 8436 passed radioinfluence voltage test according to ANSI C29.9, cl. 7.2.4.

7.2.5 Thermal Shock Test
The test was carried out on three post insulator according to ANSI C 29.9, cl 7.2.5. Each tested post insulator was first
immersed in a hot water bath 150 °F (66 °C) for 10 minutes. Then it was withdrawn and immersed in a cold water bath 39 F (4
°C) for 10 minutes. After tenth cycle each post insulator was tested for electrical soundness by low-frequency momentary
flashover voltage test.
Thermal Shock Test Results
10 cycles (150 °F / 10 min and
39 °F/ 10 min)

Low-frequency Momentary
Flashover Voltage Test

Flashover
voltage (kV)

Result

Test Sample No. 1

No failure

No failure

242

Passed

Test Sample No. 2

No failure

No failure

246

Passed

Test Sample No. 3

No failure

No failure

241

Passed

No failure occurred during the thermal shock test according to ANSI C29.9, cl. 7.2.5. All test samples met the requirements.
Post type insulator TR-216, Catalog No. 8436 passed thermal shock test according to ANSI C29.9, cl. 7.2.5.

Page 3 of 5

GAMMA Catalog 8436
Design Test Certification
7.2.6 Compression Strength Test
Temperature 68 -71.6 °F (20-22 °C), Minimum failing load 24,998.75 lbs. (111.2 kN). Smooth increase in load
450 - 900 lbs./s. (2 - 4 kN/s), Smooth load up to failure, visual inspection
Compression Strength Test Results
Sample No.

Maximum failure load lbs. (kN)

Failure Mode

Result (MFL)

7

(3754)

Ceramic core

Passed

8

(3628)

Ceramic core

Passed

9

(3472)

Ceramic core

Passed

Average

(3618)

7.2.7 Torsional Strength Test
Temperature during test + 73.4 °F (+ 23 °C), Minimum failing load (MFL) 15,002 lb.-in. (1.695 kNm), Smooth increase in load
265.52- 442.54 lb.-in./s (0.03 – 0.05 kNm/s), Smooth load up until 57,530 lb.-in. (6.5 kNm) – The limit of screws used, test
stopped by operator, visual inspection.

Torsional Strength Test Results
Sample
No.

Maximum Reached Torsional Moment
lbs.-in. (kNm)

Failure Mode

Result (MFL)

10

>57,530 (6.5)

Insulator did not fail.
Test stopped by operator.

Passed

11

>57,530 (6.5)

Insulator did not fail.
Test stopped by operator

Passed

12

>57,530 (6.5)

Insulator did not fail.
Test stopped by operator

Passed

7.3.4 Cantilever Strength Test
Temperature during test + 71.6 °F (+ 22 °C), Minimum failing load (MFL) 1,506.22 lbs. (6. kN), Increase in load 6.74 – 13.49 lbs.
/s (0.03 - 0.06 kN/s), smoothly until failure

Cantilever Strength Test Results
Sample
No.

Maximum failing load lbs. (kN]

Failure Mode

Result (MFL)

1

2,855.07 (12.7)

Failed at bottom part of ceramic core

Passed

2

1775.99 (7.9)

Failed at bottom part of ceramic core

Passed

3

2472.90 (11.0)

Failed at bottom part of ceramic core

Passed

Average

2360.50 (10.5)

Page 4 of 5

GAMMA Catalog 8436
Design Test Certification

7.3.5 Tensile strength
Temperature 68 – 69.8 °F (20-21 °C), Minimum failing load (MFL) 16,006.40 lbs. (71.2 kN), Increase in load 6.74 – 13.49 lbs./s
(0.3 – 0.6 kN/s), smoothly. Smooth load up to Failure, visual inspection.

Tensile Strength Test Results
Sample
No.
4

Maximum failure load
lbs. (kN)
25,628.22 (114.0)

Failure Mode

Result (MFL)

Ceramic core inside of metal cap

Passed

5

23,649.90 (105.2)

Ceramic core inside of metal cap

Passed

6

24,661.54 (109.7)

Ceramic core inside of metal cap

Passed

Average

24,639.06 (109.6)

Tests performed at EGU HV Laboratory a. s., Test No.10201/B/15, and The Klokner Institute, Report No. 128/15/AL.
All test results contained in this document are held on file under drawing number reference 84361011.

__________________________________
Frank Escobar
Chief Engineer, GAMMA Insulators Corporation

Page 5 of 5

Design Test Certification
Material Tested

GAMMA-CERISOL Catalog Number 288SU0650

TEST OBJECT:

Station Post Insulator

TYPE SPECIFICATION:

TR 288

TEST STANDARDS:

ANSI C29.9, ANSI C29.1, NEMA No. 107:1993

SCHEDULE OF TESTS
Design Tests, Section 7.2

Page

Test Section Description of Test

Electrical Tests
2

7.2.1

Low-frequency Wet Withstand Voltage

3

7.2.2 & 7.2.3 Critical Impulse Flashover Positive & Impulse Withstand Voltage

5

7.2.4

Radio-influence voltage tests

Mechanical Tests
6

7.2.5

Thermal shock test

7

7.2.6

Compression Strength

8

7.2.7

Torsional Strength

Quality Conformance Tests, Section 7.3
9

7.3.4

Cantilever Strength

10

7.3.5

Tensile Strength

All Electrical tests were performed per the requirements of ANSI test standard C29.9:2012, ANSI C29.1:2012, and
NEMA No. 107:1993. All Mechanical tests were performed per the requirements of ANSI test standard
C29.9 - 1983 (R1996), and ANSI C29.1 – 1988 (R2002).

Page 1 of 5

GAMMA-CERISOL Catalog 288SU0650
Design Test Certification
7.2.1 Low-frequency Wet Withstand Voltage
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.1. The rated wet withstand voltage was
applied on each of the tested post insulator for 10 seconds.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Low-frequency Wet Withstand Voltage Test Results
Station post insulator
Sample No. 1
Sample No.2
Sample No.3
b (in Hg)
28.88
28.88
28.88
t (°F)
60.6
60.6
60.6
r.i. (mm/min)
5.0
5.0
5.0
Rw (Ωm)
200.0
200.0
200.0
VLW (kV)
275
275
275
T (s)
10
10
10
result
No flashover occurred
No flashover occurred
No flashover occurred
No flashover occurred during the test at the rated wet withstand voltage 275 kV specified by ANSI C29.9, Table 2. All test
samples met the requirements. Station post insulator TR 288, Catalog No. 288SU0650 passed low-frequency wet withstand
voltage tests according to ANSI C29.9, cl. 7.2.1.

7.2.2 & 7.2.3 Impulse Withstand Voltage Test and Flashover Voltage
The tests were carried out on the three post insulators according to ANSI C29.9, cl. 7.2.2 and 7.2.3. Three consecutive impulses
of the rated impulse-withstand value of both polarities were applied on each of tested post insulator. The critical impulse
voltages of both polarities were determined by the up and down method with 30 impulses.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Impulse Withstand Voltage and Flashover Voltage Test Results
Polarity
Test sample No.
VIW (kV)
Impulses
Flashovers
b (in Hg)
t (°F)
Kh
Kd
VCRS LI (kV)
VCRSA LI (kV)

1
650
3
0
28.85
60.6
1.066
0.995
701

+
2
650
3
0
28.85
60.6
1.066
0.995
711
706

3
650
3
0
28.76
61.7
1.061
0.990
706

1
650
3
0
28.85
60.6
1.058
0.995
863

2
650
3
0
28.85
60.6
1.058
0.995
846
846

3
650
3
0
28.76
61.7
1.054
0.990
829

No flashover occurred during the test with three impulses at the rated impulse-withstand voltage 650 kV specified by ANSI
C29.9, Table 2. All test samples met the requirements. Station post insulator TR 288, Catalog No. 288SU0650 passed impulse
withstand voltage tests according to ANSI C29.9, cl. 7.2.3.
The rated critical-impulse flashover voltage 710 kV is specified by ANSI C29.9, Table 2. The average values of critical-impulse
flashover voltages are higher than 92 percent of the rated critical-impulse flashover voltage, i.e. 653 kV. All test samples met

Page 2 of 5

the requirements. Station post insulator TR 288, Catalog No. 288SU0650 passed critical impulse flashover voltage tests
according to ANSI C29.9, cl. 7.2.2.

GAMMA-CERISOL Catalog 288SU0650
Design Test Certification
7.2.4 Radio-influence Voltage (RIV) Test
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.4. Radio-influence voltage was measured at
the frequency 1.0 MHz in accordance with circuit diagram in Figure 3 – 3a of NEMA No. 107, Section 3.
The test arrangement was set up according to ANSI C29.1, cl. 4.9.1.

Radio-influence Voltage (RIV) Test Results
Station post insulator
b (in Hg)
t (°F)
VT (kV)
97
88
79
70
61
0

Sample No.1

Sample No.2

Sample No. 3

29.03
59.5
RIV (µV)
6
6
6
6
6
6

29.03
59.7
RIV (µV)
6
6
6
6
6
6

29.03
59.7
RIV (µV)
6
6
6
6
6
6

Rated value: ma. 200 µV at 88 kV/1.0 MHz
Measured values of radio-influence voltages on post insulators at test voltage 88kV (1MHz) are less than 200 µV specified by
ANSI C29.9, Table 2. All test samples met the requirements. Station post insulator TR 288, Catalog No. 288SU0650 passed
radio-influence voltage tests according to ANSI C29.9, cl. 7.2.4.

7.2.5 Thermal Shock Test
The test was carried out on three post insulator according to ANSI C 29.9, cl 7.2.5. Each tested post insulator was first
immersed in a hot water bath 150 °F (66 °C) for 10 minutes. Then it was withdrawn and immersed in a cold water bath
39 °F (4 °C) for 10 minutes. After tenth cycle each post insulator was tested for electrical soundness by low-frequency
momentary flashover voltage test.

Thermal Shock Test Results

Test sample #1
Test sample #2
Test sample #3

10 cycles
(150 °F/ 10 min and 39 °F/ 10
min)
No failure
No failure
No failure

Low-frequency Momentary
Flashover Voltage Test

Flashover voltage
(kV)

Result

No failure
No failure
No failure

410
404
413

Passed
Passed
Passed

No Failure occurred during the thermal shock test according to ANSI C29.9, cl. 7.2.5. All test samples met the requirements.
Station post insulator TR 288, Catalog No. 288SU0650 passed thermal shock test according to ANSI C29.9, cl. 7.2.5.

Page 3 of 5

GAMMA-CERISOL Catalog 288SU0650
Design Test Certification

7.2.6 Compression Strength Test
Temperature 68 -71.6 °F (20-22 °C), Minimum failing load 60,000 lbs. (266.880 kN). Smooth increase in load 450 - 900 lbs. /s.
(2 - 4 kN/s), Smooth load up until 67,442.68 lbs. (300 kN), 3 sec hold on this level and unloading, visual inspection.
Compression Strength Test Results
Sample No.
1
2
3

Load 67,442.68 lbs. (300 kN)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

7.2.7 Torsional Strength Test
Temperature during test + 73.4 °F (+ 23 °C), Minimum failing load (MFL) 40,000 lb.-in. (4.52 kNm), Smooth increase in load
265.52- 442.54 lb.-in./s (0.03 – 0.05 kNm/s), Smooth load up until 44,253.73 lb.-in. (5 kNm), 3 sec hold on this level and
unloading, visual inspection.

Torsional Strength Test Results
Sample No.
1
2
3

Torsional moment 44,253.73 lb.-in. (5 kNm)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

7.3.4 Cantilever Strength Test
Temperature during test + 71.6 °F (+ 22 °C), Minimum failing load (MFL) 1,400 lbs. (6.227 kN), Increase in load
6.74 – 13.49 lbs. /s (0.03 - 0.06 kN/s), smoothly until failure

Cantilever Strength Test Results
Sample No.

Maximum failing load lbs. (kN)

Way of failure

Result
(MFL)

1
2
3

2,592.05 lbs. (11.53kN)
2,189.64 lbs. ( 9.74kN)
2,297.55 lbs. (10.22kN)

Failed at bottom part of ceramic core
Failed at bottom part of ceramic core
Failed at bottom part of ceramic core

Passed
Passed
Passed

Average

2,358.25 lbs. (10.49kN)

Page 4 of 5

GAMMA-CERISOL Catalog 288SU0650
Design Test Certification

7.3.5 Tensile strength
Temperature 68 – 69.8 °F (20-21 °C), Minimum failing load (MFL) 20,000 lbs. (88.96 kN), Increase in load 6.74 – 13.49 lbs./s
(0.3 – 0.6 kN/s), smoothly. Smooth load up until 21,356.85.07 lbs. (95 kN), 3 sec hold on this level and unloading, visual
inspection.

Tensile Strength Test Results
Sample No.
1
2
3

Load 21,356.07 lbs. (95 kN)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

Tests performed at EGU HV Laboratory a. s., Test No.10060/B/14, and The Klokner Institute, Report No. 57/14/AL.
All test results contained in this document are held on file under drawing number reference H21288EJ.

__________________________________
Frank Escobar
Chief Engineer, GAMMA Insulators Corporation

Page 5 of 5

Design Test Certification
Material Tested

GAMMA-CERISOL Catalog Number 308HU0900

TEST OBJECT:

Station Post Insulator

TYPE SPECIFICATION:

TR 308

TEST STANDARDS:

ANSI C29.9, ANSI C29.1, NEMA No. 107:1993

SCHEDULE OF TESTS
Design Tests, Section 7.2

Page

Test Section Description of Test

Electrical Tests
2

7.2.1

Low-frequency Wet Withstand Voltage

3

7.2.2 & 7.2.3 Critical Impulse Flashover Positive & Impulse Withstand Voltage

5

7.2.4

Radio-influence voltage tests

Mechanical Tests
6

7.2.5

Thermal shock test

7

7.2.6

Compression Strength

8

7.2.7

Torsional Strength

Quality Conformance Tests, Section 7.3
9

7.3.4

Cantilever Strength

10

7.3.5

Tensile Strength

All Electrical tests were performed per the requirements of ANSI test standard C29.9:2012, ANSI C29.1:2012, and
NEMA No. 107:1993. All Mechanical tests were performed per the requirements of ANSI test standard
C29.9 - 1983 (R1996), and ANSI C29.1 – 1988 (R2002).

GAMMA-CERISOL Catalog 308HU0900
Design Test Certification
7.2.1 Low-frequency Wet Withstand Voltage
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.1. The rated wet withstand voltage was
applied on each of the tested post insulator for 10 seconds.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Low-frequency Wet Withstand Voltage Test Results

b (in Hg)
t (°F)
r.i. (mm/min)
Rw (Ωm)
VLW (kV)
T (s)
result

Sample No. 1
28.79
60.6
5.0
200.0
385
10
No flashover occurred

Station post insulator
Sample No.2
28.79
60.6
5.0
200.0
385
10
No flashover occurred

Sample No.3
28.79
60.6
5.0
200.0
385
10
No flashover occurred

No flashover occurred during the test at the rated wet withstand voltage 385 kV specified by ANSI C29.9, Table 2. All test
samples met the requirements. Station post insulator TR 308, Catalog No. 308HU0900 passed low-frequency wet withstand
voltage tests according to ANSI C29.9, cl. 7.2.1.

7.2.2 & 7.2.3 Impulse Withstand Voltage Test and Flashover Voltage
The tests were carried out on the three post insulators according to ANSI C29.9, cl. 7.2.2 and 7.2.3. Three consecutive impulses
of the rated impulse-withstand value of both polarities were applied on each of tested post insulator. The critical impulse
voltages of both polarities were determined by the up and down method with 30 impulses.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Impulse Withstand Voltage and Flashover Voltage Test Results
Polarity
Test Sample No.
VIW (kV)
Impulses
Flashovers
b (in Hg)
t (°F)
Kh
Kd
VCRS LI (kV)
VCRSA LI (kV)

1
1010
3
0
28.79
61.0
1.064
0.992
1112

+
2
1010
3
0
28.79
61.0
1.064
0.992
1105
1108

3
1010
3
0
28.79
61.0
1.064
0.992
1106

1
1010
3
0
28.79
61.0
1.056
0.992
1277

2
1010
3
0
28.79
61.0
1.056
0.992
1277
1284

3
1010
3
0
28.79
61.0
1.056
0.992
1299

No flashover occurred during the test with three impulses at the rated impulse-withstand voltage 1010 kV specified by ANSI
C29.9, Table 2. All test samples met the requirements. Station post insulator TR 308, Catalog No. 308HU0900 passed impulse
withstand voltage tests according to ANSI C29.9, cl. 7.2.3.
The rated critical-impulse flashover voltage 1010 kV is specified by ANSI C29.9, Table 2. The average values of critical-impulse
flashover voltages are higher than 92 percent of the rated critical-impulse flashover voltage, i.e. 929 kV. All test samples met

Page 2 of 5

the requirements. Station post insulator TR 308, Catalog No. 308HU0900 passed critical impulse flashover voltage tests
according to ANSI C29.9, cl. 7.2.2.

GAMMA-CERISOL Catalog 308HU0900
Design Test Certification
7.2.4 Radio-influence Voltage (RIV) Test
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.4. Radio-influence voltage was measured at
the frequency 1.0 MHz in accordance with circuit diagram in Figure 3 – 3a of NEMA No. 107, Section 3.
The test arrangement was set up according to ANSI C29.1, cl. 4.9.1.

Radio-influence Voltage (RIV) Test Results
Station post insulator
b (in Hg)
t (°F)
VT (kV)
161
146
131
116
101
86
71
0

Sample No.1

Sample No.2

Sample No. 3

29.00
60.3
RIV (µV)
141
45
10
6
6
6
6
6

29.00
60.3
RIV (µV)
63
32
20
11
7
6
6
6

29.00
60.4
RIV (µV)
100
50
14
9
6
6
6
6

Rated value: ma. 500 µV at 146 kV/1.0 MHz
Measured values of radio-influence voltages on post insulators at test voltage 146kV (1MHz) are less than 500 µV specified by
ANSI C29.9, Table 2. All test samples met the requirements. Station post insulator TR 308, Catalog No. 308HU0900 passed
radio-influence voltage tests according to ANSI C29.9, cl. 7.2.4.

7.2.5 Thermal Shock Test
The test was carried out on three post insulator according to ANSI C 29.9, cl 7.2.5. Each tested post insulator was first
immersed in a hot water bath 150 °F (66 °C) for 10 minutes. Then it was withdrawn and immersed in a cold water bath
39 °F (4 °C) for 10 minutes. After tenth cycle each post insulator was tested for electrical soundness by low-frequency
momentary flashover voltage test.

Thermal Shock Test Results

Test sample #1
Test sample #2
Test sample #3

10 cycles
(150 °F/ 10 min, and 39 °F/ 10 min)
No failure
No failure
No failure

Low-frequency Momentary
Flashover Voltage Test
No failure
No failure
No failure

Flashover
voltage (kV)
596
585
591

Result
Passed
Passed
Passed

No Failure occurred during the thermal shock test according to ANSI C29.9, cl. 7.2.5. All test samples met the requirements.
Station post insulator TR 308, Catalog No. 308HU0900 passed thermal shock test according to ANSI C29.9, cl. 7.2.5.

Page 3 of 5

GAMMA-CERISOL Catalog 308HU0900
Design Test Certification
7.2.6 Compression Strength Test
Temperature 68 -71.6 °F (20-22 °C), Minimum failing load 75,000 lbs. (333.6 kN). Smooth increase in load 450 - 900 lbs. /s.
(2 - 4 kN/s), Smooth load up until 89,923 lbs. (400 kN), 3 sec hold on this level and unloading, visual inspection.
Compression Strength Test Results
Load 89,923 lbs. (400kN)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Sample No.
1
2
3

Result (MFL)
Passed
Passed
Passed

7.2.7 Torsional Strength Test
Temperature during test + 73.4 °F (+ 23 °C), Minimum failing load (MFL) 90,000 lb.-in. (10.17 kNm), Smooth increase in load
265.52- 442.54 lb.-in./s (0.03 – 0.05 kNm/s), Smooth load up until 92,932.83 lb.-in. (10.5 kNm), 3 sec hold on this level and
unloading, visual inspection.

Torsional Strength Test Results
Torsional moment 92,932.83 lb.-in. (10.5 kNm)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Sample No.
1
2
3

Result (MFL)
Passed
Passed
Passed

7.3.4 Cantilever Strength Test
Temperature during test + 71.6 °F (+ 22 °C), Minimum failing load (MFL) 1,450 lbs. (6.45 kN), Increase in load 6.74 – 13.49 lbs. /s
(0.03 - 0.06 kN/s), smoothly until failure

Cantilever Strength Test Results
Sample No.

Maximum failing load, lbs. (kN)

Way of failure

Result (MFL)

1

1,978.32 (8.8)

Failed at bottom part of ceramic core

Passed

2

2,176.15 (9.68)

Failed at bottom part of ceramic core

Passed

3

2,000.80 (8.9)

Failed at bottom part of ceramic core

Passed

Average

2,050.26 (9.12)

Page 4 of 5

GAMMA-CERISOL Catalog 308HU0900
Design Test Certification
7.3.5 Tensile strength
Temperature 68 – 69.8 °F (20-21 °C), Minimum failing load (MFL) 25,000 lbs. (111.2 kN), Increase in load 6.74 – 13.49 lbs./s
(0.3 – 0.6 kN/s), smoothly. Smooth load up until 26,977.07 lbs. (120 kN), 3 sec hold on this level and unloading, visual
inspection.

Tensile Strength Test Results
Sample No.
1
2
3

Load 26,977.07 lbs. (120 kN)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

Tests performed at EGU HV Laboratory a. s., Test No.10060/C/14, and The Klokner Institute, Report No. 56/14/AL.
All test results contained in this document are held on file under drawing number reference H21308EJ.

__________________________________
Frank Escobar
Chief Engineer, GAMMA Insulators Corporation

Page 5 of 5

Design Test Certification
Material Tested

GAMMA-CERISOL Catalog Number 369ET1300

TEST OBJECT:

Station Post Insulator

TYPE SPECIFICATION:

TR 369

TEST STANDARDS:

ANSI C29.9, ANSI C29.1, NEMA No. 107:1993

SCHEDULE OF TESTS
Design Tests, Section 7.2

Page

Test Section Description of Test

Electrical Tests
2

7.2.1

Low-frequency Wet Withstand Voltage

3

7.2.2 & 7.2.3 Critical Impulse Flashover Positive & Impulse Withstand Voltage

5

7.2.4

Radio-influence voltage tests

Mechanical Tests
6

7.2.5

Thermal shock test

7

7.2.6

Compression Strength

8

7.2.7

Torsional Strength

Quality Conformance Tests, Section 7.3
9

7.3.4

Cantilever Strength

10

7.3.5

Tensile Strength

All Electrical tests were performed per the requirements of ANSI test standard C29.9:2012, ANSI C29.1:2012, and
NEMA No. 107:1993. All Mechanical tests were performed per the requirements of ANSI test standard
C29.9 - 1983 (R1996), and ANSI C29.1 – 1988 (R2002).

Page 1 of 5

GAMMA-CERISOL Catalog 369ET1300
Design Test Certification
7.2.1 Low-frequency Wet Withstand Voltage
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.1. The rated wet withstand voltage was
applied on each of the tested post insulator for 10 seconds.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Low-frequency Wet Withstand Voltage Test Results
Station post insulator
Sample No. 1
Sample No.2
28.82
28.82
59.4
59.4
4.9
4.9
200.0
200.0
525
525
10
10
No flashover occurred
No flashover occurred

b (in Hg)
t (°F)
r.i. (mm/min)
Rw (Ωm)
VLW (kV)
T (s)
result

Sample No.3
28.82
59.4
4.9
200.0
525
10
No flashover occurred

No flashover occurred during the test at the rated wet withstand voltage 525 kV specified by ANSI C29.9, Table 2. All test
samples met the requirements. Station post insulator TR 369, Catalog No. 369ET1300 passed low-frequency wet withstand
voltage tests according to ANSI C29.9, cl. 7.2.1.

7.2.2 & 7.2.3 Impulse Withstand Voltage Test and Flashover Voltage
The tests were carried out on the three post insulators according to ANSI C29.9, cl. 7.2.2 and 7.2.3. Three consecutive impulses
of the rated impulse-withstand value of both polarities were applied on each of tested post insulator. The critical impulse
voltages of both polarities were determined by the up and down method with 30 impulses.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Impulse Withstand Voltage and Flashover Voltage Test Results
Polarity

+

-

Test sample no.

1

2

3

1

2

3

VIW (kV)
Impulses
Flashovers
b (in Hg)
t (°F)
Kh
Kd
VCRS LI (kV)
VCRSA LI (kV)

1410
3
0
28.82
60.6
1.073
0.994
1470

1410
3
0
28.88
60.4
1.066
0.996
1438
1451

1410
3
0
28.82
60.6
1.073
0.994
1446

1410
3
0
28.82
60.6
1.064
0.994
1650

1410
3
0
28.88
60.4
1.058
0.996
1645
1645

1410
3
0
28.82
60.6
1.064
0.994
1639

No flashover occurred during the test with three impulses at the rated impulse-withstand voltage 1410 kV specified by ANSI
C29.9, Table 2. All test samples met the requirements. Station post insulator TR 369, Catalog No. 369ET1300 passed impulse
withstand voltage tests according to ANSI C29.9, cl. 7.2.3.
The rated critical-impulse flashover voltage 1410 kV is specified by ANSI C29.9, Table 2. The average values of critical-impulse
flashover voltages are higher than 92 percent of the rated critical-impulse flashover voltage, i.e. 1297 kV. All test samples met

Page 2 of 5

the requirements. Station post insulator TR 369, Catalog No. 369ET1300 passed critical impulse flashover voltage tests
according to ANSI C29.9, cl. 7.2.2.

GAMMA-CERISOL Catalog 369ET1300
Design Test Certification
7.2.4 Radio-influence Voltage (RIV) Test
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.4. Radio-influence voltage was measured at
the frequency 1.0 MHz in accordance with circuit diagram in Figure 3 – 3a of NEMA No. 107, Section 3.
The test arrangement was set up according to ANSI C29.1, cl. 4.9.1.

Radio-influence Voltage (RIV) Test Results
Station post insulator
b (in Hg)
t (°F)
VT (kV)
242
220
198
176
154
132
110
88
66
0

Sample No.1

Sample No.2

Sample No. 3

29.03
59.7
RIV (µV)
631
355
251
158
126
100
79
5
5
5

29.03
59.7
RIV (µV)
794
501
316
224
126
100
7
5
5
5

29.03
59.9
RIV (µV)
631
447
282
224
126
100
9
5
5
5

Rated value: ma. 1000 µV at 220 kV/1.0 MHz
Measured values of radio-influence voltages on post insulators at test voltage 220kV (1MHz) are less than 1000 µV specified by
ANSI C29.9, Table 2. All test samples met the requirements. Station post insulator TR 369, catalog No. 369ET1300 passed radioinfluence voltage tests according to ANSI C29.9, cl. 7.2.4.

7.2.5 Thermal Shock Test
The test was carried out on three post insulator according to ANSI C 29.9, cl 7.2.5. Each tested post insulator was first
immersed in a hot water bath 150 °F (66 °C) for 10 minutes. Then it was withdrawn and immersed in a cold water bath
39 °F (4 °C) for 10 minutes. After tenth cycle each post insulator was tested for electrical soundness by low-frequency
momentary flashover voltage test.

Thermal Shock Test Results

Test sample #1
Test sample #2
Test sample #3

10 cycles
(150 °F/ 10 min and 39 °F/ 10 min)
No failure
No failure
No failure

Low-frequency Momentary
Flashover Voltage Test
No failure
No failure
No failure

Flashover voltage
(kV)
764
752
760

Result
Passed
Passed
Passed

No Failure occurred during the thermal shock test according to ANSI C29.9, cl. 7.2.5. All test samples met the requirements.
Station post insulator TR 369, Catalog No. 369ET1300 passed thermal shock test according to ANSI C29.9, cl. 7.2.5.

Page 3 of 5

GAMMA-CERISOL Catalog 369ET1300
Design Test Certification
7.2.6 Compression Strength Test
Temperature 68 -71.6 °F (20-22 °C), Minimum failing load 60,000 lbs. (266.880 kN). Smooth increase in load 450 - 900 lbs. /s.
(2 - 4 kN/s), Smooth load up until 89,923 lbs. (400 kN), 3 sec hold on this level and unloading, visual inspection.
Compression Strength Test Results
Load 89,923 lbs. Load (400 kN)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Sample No.
1
2
3

Result (MFL)
Passed
Passed
Passed

7.2.7 Torsional Strength Test
Temperature during test + 73.4 °F (+ 23 °C), Minimum failing load (MFL) 40,000 lb.-in. (4.52 kNm), Smooth increase in load
265.52- 442.54 lb.-in./s (0.03 – 0.05 kNm/s), Smooth load up until 44,253.73 lb.-in. (5 kNm), 3 sec hold on this level and
unloading, visual inspection.

Torsional Strength Test Results
Sample No.
1
2
3

Torsional moment 44,248 lb.-in. (5 kNm)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

7.3.4 Cantilever Strength Test
Temperature during test + 71.6 °F (+ 22 °C), Minimum failing load (MFL) 2,050 lbs. (9.118 kN), Increase in load 9.0 – 15.74 lbs. /s
(0.04 - 0.07 kN/s), smoothly until failure

Cantilever Strength Test Results
Sample No.

Maximum failing load lbs. (kN)

Way of failure

Result (MFL)

1

3,331.67 (14.82)

Failed at bottom part of ceramic core

Passed

2

3,167.56 (14.09)

Failed at bottom part of ceramic core

Passed

3

2,542.59 (11.31)

Failed at bottom part of ceramic core

Passed

Average

3,012.44 (13.4)

Page 4 of 5

GAMMA-CERISOL Catalog 369ET1300
Design Test Certification

7.3.5 Tensile strength
Temperature 68 – 69.8 °F (20-21 °C), Minimum failing load (MFL) 20,000 lbs. (88.960 kN), Increase in load 6.74 – 13.49 lbs./s
(0.3 – 0.6 kN/s), smoothly. Smooth load up until 26,977.07 lbs. (120 kN), 3 sec hold on this level and unloading, visual
inspection.

Tensile Strength Test Results
Sample No.
1
2
3

Load 26,977.07 lbs. (120 kN
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

Tests performed at EGU HV Laboratory a. s., Test No.10060/D/14, and The Klokner Institute, Report No. 55/14/AL.
All test results contained in this document are held on file under drawing number reference H21369EJ.

__________________________________
Frank Escobar
Chief Engineer, GAMMA Insulators Corporation

Page 5 of 5

Design Test Certification
Material Tested

GAMMA-CERISOL Catalog Number 391ST1800

TEST OBJECT:

Station Post Insulator

TYPE SPECIFICATION:

TR 391

TEST STANDARDS:

ANSI C29.9, ANSI C29.1, NEMA No. 107:1993

SCHEDULE OF TESTS
Design Tests, Section 7.2

Page

Test Section Description of Test

Electrical Tests
2

7.2.1

Low-frequency Wet Withstand Voltage

3

7.2.2 & 7.2.3 Critical Impulse Flashover Positive & Impulse Withstand Voltage

5

7.2.4

Radio-influence voltage tests

Mechanical Tests
6

7.2.5

Thermal shock test

7

7.2.6

Compression Strength

8

7.2.7

Torsional Strength

Quality Conformance Tests, Section 7.3
9

7.3.4

Cantilever Strength

10

7.3.5

Tensile Strength

All Electrical tests were performed per the requirements of ANSI test standard C29.9:2012, ANSI C29.1:2012, and
NEMA No. 107:1993. All Mechanical tests were performed per the requirements of ANSI test standard
C29.9 - 1983 (R1996), and ANSI C29.1 – 1988 (R2002).

Page 1 of 5

GAMMA-CERISOL Catalog 391ST1800
Design Test Certification

7.2.1 Low-frequency Wet Withstand Voltage
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.1. The rated wet withstand voltage was
applied on each of the tested post insulator for 10 seconds.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Low-frequency Wet Withstand Voltage Test Results
Station post insulator
Sample No. 1
Sample No.2
Sample No.3
b (in Hg)
29.4
29.4
29.4
t (°F)
59.2
59.2
59.2
r.i. (mm/min)
5.0
5.0
5.0
Rw (Ωm)
200.0
200.0
200.0
VLW (kV)
710
710
710
T (s)
10
10
10
result
No flashover occurred
No flashover occurred
No flashover occurred
No flashover occurred during the test at the rated wet withstand voltage 230 kV specified by ANSI C29.9, Table 2. All test
samples met the requirements. Station post insulator TR 391, Catalog No. 391ST1800 passed low-frequency wet withstand
voltage tests according to ANSI C29.9, cl. 7.2.1.

7.2.2 & 7.2.3 Impulse Withstand Voltage Test and Flashover Voltage
The tests were carried out on the three post insulators according to ANSI C29.9, cl. 7.2.2 and 7.2.3. Three consecutive impulses
of the rated impulse-withstand value of both polarities were applied on each of tested post insulator. The critical impulse
voltages of both polarities were determined by the up and down method with 30 impulses.
The test arrangement was set up according to ANSI C29.1, cl. 3.3

Impulse Withstand Voltage and Flashover Voltage Test Results
Polarity
Test Sample No.
VIW (kV)
Impulses
Flashovers
b (in Hg)
t (°F)
Kh
Kd
VCRS LI (kV)
VCRSA LI (kV)

1
1800
3
0
29.0
60.1
1.001
1.073
2143

+
2
1800
3
0
29.0
60.1
1.001
1.073
2139
2131

3
1800
3
0
29.0
60.1
1.001
1.073
2110

1
1800
3
0
29.0
60.1
1.001
1.064
2316

2
1800
3
0
29.0
60.1
1.001
1.064
2292
2303

3
1800
3
0
29.0
60.1
1.001
1.064
2302

No flashover occurred during the test with three impulses at the rated impulse-withstand voltage 1800 kV specified by ANSI
C29.9, Table 2. All test samples met the requirements. Station post insulator TR 391, Catalog No. 391ST1800 passed impulse
withstand voltage tests according to ANSI C29.9, cl. 7.2.3.
The rated critical-impulse flashover voltage 2000 kV is specified by ANSI C29.9, Table 2. The average values of critical-impulse
flashover voltages are higher than 92 percent of the rated critical-impulse flashover voltage, i.e. 1840 kV. All test samples met
the requirements. Station post insulator TR 391, Catalog No. 391ST1800 passed critical-impulse flashover voltage tests
according to ANSI C29.9, cl. 7.2.2.

Page 2 of 5

GAMMA-CERISOL Catalog 391ST1800
Design Test Certification

7.2.4 Radio-influence Voltage (RIV) Test
The tests were carried out on three post insulators according to ANSI C29.9, cl. 7.2.4. Radio-influence voltage was measured at
the frequency 1.0 MHz in accordance with circuit diagram in Figure 3 – 3a of NEMA No. 107, Section 3.
The test arrangement was set up according to ANSI C29.1, cl. 4.9.1.

Radio-influence Voltage (RIV) Test Results
Station post insulator
b (in Hg)
t (°F)
VT (kV)
350
318
286
254
222
190
158
126
0

Sample No.1

Sample No.2

Sample No. 3

29.03
60.1
RIV (µV)
562
100
56
32
20
5
5
5
5

29.03
60.1
RIV (µV)
562
112
63
28
20
5
5
5
5

29.03
60.1
RIV (µV)
794
89
56
35
18
5
5
5
5

Rated value: ma. 2000 µV at 318 kV/1.0 MHz
Measured values of radio-influence voltages on post insulators at test voltage 318kV (1MHz) are less than 2000 µV specified by
ANSI C29.9, Table 2. All test samples met the requirements. Station post insulator TR 391, Catalog No. 391ST1800 passed
radio-influence voltage tests according to ANSI C29.9, cl. 7.2.4.

7.2.5 Thermal Shock Test
The test was carried out on three post insulator according to ANSI C 29.9, cl 7.2.5. Each tested post insulator was first
immersed in a hot water bath 150 °F (66 °C) for 10 minutes. Then it was withdrawn and immersed in a cold water bath 39 °F
(4 °C) for 10 minutes. After tenth cycle each post insulator was tested for electrical soundness by low-frequency momentary
flashover voltage test.

Thermal Shock Test Results

Test sample #1
Test sample #2
Test sample #3

10 cycles
(150 °F/ 10 min and 39 F/
10 min)
No failure
No failure
No failure

Low-frequency
Momentary Flashover
Voltage Test
No failure
No failure
No failure

Flashover voltage
(kV)

Result

937
945
929

Passed
Passed
Passed

No Failure occurred during the thermal shock test according to ANSI C29.9, cl. 7.2.5. All test samples met the requirements.
Station post insulator TR 391, Catalog No. 391ST1800 passed thermal shock test according to ANSI C29.9, cl. 7.2.5.

Page 3 of 5

GAMMA-CERISOL Catalog 391ST1800
Design Test Certification

7.2.6 Compression Strength Test
Temperature 68 -71.6 °F (20-22 °C), Minimum failing load 60,000 lbs. (266.880 kN). Smooth increase in load 450 - 900 lbs. /s.
(2 - 4 kN/s), Smooth load up until 89,923 lbs. (400 kN), 3 sec hold on this level and unloading, visual inspection.
Compression Strength Test Results
Load 89,923 (400 kN),
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Sample No.
1
2
3

Result (MFL)
Passed
Passed
Passed

7.2.7 Torsional Strength Test
Temperature during test + 73.4 °F (+ 23 °C), Minimum failing load (MFL) 40,000 lb.-in. (4.52 kNm), Smooth increase in load
265.52- 442.54 lb.-in./s (0.03 – 0.05 kNm/s), Smooth load up until 44,253.72 lb.-in. (5 kNm), 3 sec hold on this level and
unloading, visual inspection.

Torsional Strength Test Results
Sample No.
1
2
3

Torsional moment 44,253.72 lb.-in (5 kNm)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

7.3.4 Cantilever Strength Test
Temperature during test + 71.6 °F (+ 22 °C), Minimum failing load (MFL) 1,400 lbs. (6.227 kN), Increase in load
6.74 – 13.49 lbs. /s (0.03 - 0.06 kN/s), smoothly until failure

Cantilever Strength Test Results
Sample
No.

Maximum failing load [kN]

Way of failure

Result
(MFL)

1
2
3

9.26
7.04
7.84

Failed at bottom part of ceramic core
Failed at bottom part of ceramic core
Failed at bottom part of ceramic core

Passed
Passed
Passed

Average

8.05

Page 4 of 5

GAMMA-CERISOL Catalog 391ST1800
Design Test Certification

7.3.5 Tensile strength
Temperature 68 – 69.8 °F (20-21 °C), Minimum failing load (MFL) 20,000 lbs. (88.960 kN), Increase in load 6.74 – 13.49 lbs./s
(0.3 – 0.6 kN/s), smoothly. Smooth load up until 26,977.07 lbs. (120 kN), 3 sec hold on this level and unloading, visual
inspection.

Tensile Strength Test Results
Sample No.
1
2
3

Load 26,977.07 lbs. (120 kN)
Applied for 3 sec
Insulator did not fail
Insulator did not fail
Insulator did not fail

Result (MFL)
Passed
Passed
Passed

Tests performed at EGU HV Laboratory a. s., Test No.10060/E/14, and The Klokner Institute, Report No. 54/14/AL.
All test results contained in this document are held on file under drawing number reference H21391EJ.

__________________________________
Frank Escobar
Chief Engineer, GAMMA Insulators Corporation

Page 5 of 5



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