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Page 1: Gamma Insulators

Products

Catalog

Page 2: Gamma Insulators

GAMMA INSULATORS CORPORATION is the Electrical Grade Porcelain and Composite

Insulator division of the multinational Corona Group, a 125 year old company with over

10,000 employees, and sales in excess of $1.5 Billion worldwide. Corona is one of the

largest and most stable platforms for insulator manufacturing in the world.

Corona´s state of the art manufacturing facilities utilize the latest technologies and, are

all certified to the most recent ISO 9001, 14001 and OHSAS 18001 standards. We employ

world class manufacturing tools and management systems such as TPM, Lean

Manufacturing, DFSS and Six Sigma, among others to produce the best products with

the least impact on the environment.

LAPP INSULATORS by GAMMA

Lapp Insulators Company is known worldwide for superior performing products,

exacting standards, and an unmatched obsession with quality. So when Lapp chose

GAMMA to manufacture a product that would bear the Lapp name brand, they chose a

company that has experience selling to utilities, OEM´s, and distributors in more than 20

countries worldwide, and could meet their high expectations.

GAMMA has been manufacturing insulators for Lapp's US and Canadian markets for

nearly 10 years.

GAMMA is one of the greenest insulator manufacturers in the world. We are a vertically

integrated company and control the process from the extraction of raw materials, to the

manufacture of the insulator. Few companies can make this claim, but our engineers

have made this possible.

We look forward to being your first choice for high performance electrical grade

insulators.

Sincerely,

Mauricio Yepes

CEO

Page 3: Gamma Insulators

Why GAMMA...

Experience

Time tested and customer approved, Gamma Insulator Company has been supplying insulators

for critical transmission and distribution line applications since 1962. That experience goes into

every insulator we manufacture making Gamma products an internationally recognized

insulator solution.

Quality, Service, and Support

We take pride in our people and our product. We believe that product quality is as dependent on

our people as much as it is in the process. While Gamma employs state of the art equipment and

utilizes the latest continual process techniques, we also invest in our people. The result is a

highly qualified and well trained work force that takes pride in their work, and is proud of the

result.

Location and Logistics

Gamma's manufacturing facility is ideally located to allow for the most responsive order

fulfillment in the industry. With an increasing global supply base, delivery of high quality

insulators can take weeks or even months. That time is shortened for insulators manufactured

by Gamma.

Located in Colombia South America, and nearly on the equator, Gamma's manufacturing facility

provides equal access to both Atlantic and Pacific Ocean ports. Minimal inland transportation

and the ability to ship our product east as easily as to go west, Gamma can react faster to more

customers, than any other insulator manufacturer in the world.

At GAMMA, we understand that the product sale is only the beginning of a relationship based on

total customer satisfaction.

Page 4: Gamma Insulators

Dead Ends

Page 5: Gamma Insulators

Note 2: The insulators can be requested with extra hot-dip galvanized layer in caps and bolts for

contaminated areas

Note 1: ANSI 70 gray is standard. Brown available by request

RADIO INFLUENCE VOLTAGE DATA

Critical impulse flashover, negative

Maximum RIV at 1000 kHz, µVLow-frequency test voltage, RMS to ground

Low-frequency puncture voltage

MECHANICAL VALUES

Leakage distance

Low-frequency wet flashoverLow-frequency dry flashover

Mech, impact strength,inch.poundsCombined M & E strength, pounds

Routine proof test load, poundsTime load test value, pounds

Critical impulse flashover, positive

ELECTRICAL VALUES, kV

Dry arcing distance

CRTICAL DISTANCES, inches

ANSI CLASS (C29.2- 1992)

CATALOG REFERENCE NUMBER

InsulatorsDead Ends

Maximun working load, pounds

507.5

8090

3060

100

74

52-9A

6815-70

52-1

6605-70

100

7.550

80100

3060

6000 60005000 5000

10000 1000045 45

5000 5000

6605-70

11/1

6”

11/1

6”

11/16”

11/16”

5/8

5/8

5 1/2"

1/2"

7/8"6 1/2"

6815-70

4 3/4"

7/8"

6 1/4"

4.57

1/2"

Page 6: Gamma Insulators

Polymer

Dead Ends

Page 7: Gamma Insulators

Clevis - TonguePolymer Dead Ends

Test voltage, kVMaximum RIV 1000 kHz, µV

Length C, inchesNumber of sheds, A

DIMENSIONS ACCORDING TO DRAWING

Total height H, inches

Low-frequency wet flashoverCritical impulse flashover positive

ELECTRICAL VALUES, kV

Typical application voltage

RADIO INFLUENCE DATA

MECHANICAL VALUES

Specified mechanical load (SML) poundsRoutine test load (RTL) poundsTorsional load, lbf.ft

Dry arcing distance

CRITICAL DISTANCES, inches

Leakage distance

ANSI CLASS (C29.13 - 2000)

CATALOG NUMBER

Low-frequency dry flashover

15 20< 10

30

13 16 9/10 20 7/104 6 9

14 3/4 18 5/8 22 3/8

14585

15

215120

25

265150

35

15736 157367868 7868 7868

15736

35 35 35

7 1/216 2/16

11 3/824 13/16

15 3/836

DS-15 DS-28 DS-35

PS015 PS025 PS035

< 10 < 10

95 130 160

1 1/16"

H

A

C

3 1/2"

Note 1: Polymer housing: silicone “high voltage”Note 2: End fitting: nodular iron galvanized

Page 8: Gamma Insulators

Clevis - TonguePolymer Dead Ends

Test voltage, kVMaximum RIV 1000 kHz, µV

Length C, inchesNumber of sheds, A

DIMENSIONS ACCORDING TO DRAWING

Total height H, inches

Low-frequency wet flashoverCritical impulse flashover positive

ELECTRICAL VALUES, kV

Typical application voltage

RADIO INFLUENCE DATA

MECHANICAL VALUES

Specified mechanical load (SML) poundsRoutine test load (RTL) poundsTorsional load, lbf.ft

Dry arcing distance

CRITICAL DISTANCES, inches

Leakage distance

ANSI CLASS (C29.13 - 2000)

CATALOG NUMBER

Low-frequency dry flashover

30 45

24 2910 13

25 11/16 30 3/4

290165

46

360204

69

157367868 7868

15736

35 35

18 9/1642 15/16

2456 1/8

DS-46 DS-69

PS045 PS069

< 10 < 10

205 251

Note 1: Polymer housing: silicone “high voltage”Note 2: End fitting: nodular iron galvanized

1 1/16"

H

AC

Page 9: Gamma Insulators

Ball and SocketPolymer Dead Ends

Test voltage, kVMaximum RIV 1000 kHz, µV

Low-frequency wet flashoverCritical impulse flashover positive

ELECTRICAL VALUES, kV

Typical application voltage

RADIO INFLUENCE DATA

MECHANICAL VALUES

Specified mechanical load (SML) poundsRoutine test load (RTL) poundsTorsional load, lbf.ft

Dry arcing distance

CRITICAL DISTANCES, inches

Leakage distance

ANSI CLASS (C29.13 - 2000)

CATALOG NUMBER

Low-frequency dry flashover

15< 10

14585

15

157367868

35

7 1/2 16 2/16

DS-15

PS015B

95

A

Ø91.0

Note 1: Polymer housing: silicone “high voltage”Note 2: End fitting: nodular iron galvanized

Page 10: Gamma Insulators

Ball and socketPolymer Suspensions

30

265150

35

786815736

35

15 3/836

DS-35

PS035B

< 10

160

3 6/10"

21 1/10"

20 6/10"

Test voltage, kVMaximum RIV 1000 kHz, µV

Low-frequency wet flashoverCritical impulse flashover positive

ELECTRICAL VALUES, kV

Typical application voltage

RADIO INFLUENCE DATA

MECHANICAL VALUES

Specified mechanical load (SML) poundsRoutine test load (RTL) poundsTorsional load, lbf.ft

Dry arcing distance

CRITICAL DISTANCES, inches

Leakage distance

ANSI CLASS (C29.13 - 2000)

CATALOG NUMBER

Low-frequency dry flashover

Note 1: Polymer housing: silicone “high voltage”Note 2: End fitting: nodular iron galvanized

Page 11: Gamma Insulators

Ball and socket

30

265150

35

899217984

35

15 3/836

DS-35

PS035B80

< 10

160

3 6/10"

21 1/10"

20 6/10"

Test voltage, kVMaximum RIV 1000 kHz, µV

Low-frequency wet flashoverCritical impulse flashover positive

ELECTRICAL VALUES, kV

Typical application voltage

RADIO INFLUENCE DATA

MECHANICAL VALUES

Specified mechanical load (SML) poundsRoutine test load (RTL) poundsTorsional load, lbf.ft

Dry arcing distance

CRITICAL DISTANCES, inches

Leakage distance

ANSI CLASS (C29.13 - 2000)

CATALOG NUMBER

Low-frequency dry flashover

Note 1: Polymer housing: silicone “high voltage”Note 2: End fitting: nodular iron galvanized

Polymer Suspensions

Page 12: Gamma Insulators

13 1/2"

11 13/16"

3 1/2"

Tongue - Tongue

Length C, inches 1113/16Number of sheds 3

DIMENSIONS ACCORDING TO DRAWING

Total height H, inches 13 1/2

Low-frequency wet flashover

ELECTRICAL VALUES, kV

Typical application voltage

54

3 (Direct Current)

MECHANICAL VLAUES

Specified mechanical load (SML), poundsRoutine test load (RTL), pounds) 7868

15736

Torsional load, lbf.ft 35

Dry arcing distnace

CRITICAL DISTANCES, inches

Leakage distnace7

12

PS003CATALOG NUMBER

Low-frequency dry flashover 74

Application in metropolitan transportation

systems with direct current

Note 1: Polymer housing: silicone “high voltage”Note 2: End fitting: nodular iron galvanized

Polymer Suspensions

Page 13: Gamma Insulators

Suspensions

Page 14: Gamma Insulators

GAMMA Porcelain Suspension Insulators

Transmission lines are often referred to as the “backbone” of the electrical system, and need rock

solid components to ensure long lasting reliability. Gamma's porcelain suspension insulators,

for use on high voltage and extra high voltage transmission lines, provide utilities with the

flexibility and reliability required for such critical applications.

Designed to meet and exceed both ANSI and IEC specifications, Gamma's porcelain suspension

insulators conform to the most current industry standards* for the greatest degree of flexibility

and consistency. However, that's where being “Standard” ends.

GAMMA MANUFACTURES ITS OWN PRODUCTS!! Gamma does not use subcontractors to

manufacture and brand label its product. Instead we use state of the art equipment and

processes to produce high quality porcelain suspension insulators, consistently, every time.

In addition, Gamma has the unique ability to control nearly every step of the process. In

conjunction with its parent company, “The Corona Group** we extract, transport, and process

much of the raw material used in our insulators. We employ the engineering and technical

expertise required to support our products, and own the equipment necessary to ensure our

porcelain suspension insulators meets our high standards for quality and conformance.

Gamma's start to finish process ownership, state of the art manufacturing, and world class

technical capabilities produces porcelain suspension that utilities can rely on with confidence.

There is no mystery or guesses about where your Gamma Suspension Insulators come from,

they come from GAMMA!

*Standards

Gamma Suspension Insulators conform to

ANSI (C29.1 and C29.2)

**Gamma Insulators Corporation….

is the electrical grade insulator division of THE CORONA GROUP, a 125 year old multinational

corporation with sales in excess of $1.5 billion annually. Corona's state of the art manufacturing

facilities utilize the latest manufacturing technologies, and are all certified to the most recent

ISO 9001, 14001, and OHSAS 18001 standards. We employ world class manufacturing tools and

management systems such as TPM, Lean Manufacturing, DFSS, and Six Sigma, to name a few, in

order to produce the high quality products you've come to expect from Corona Companies.

Page 15: Gamma Insulators

Ball and Socket Type Suspension Insulators

Note 4: Part numbers 8256 and 8257 comform to ANSI Class 52-3 specifications. However they carry higher strength

rating than that required by standard

5010

125

110130

5080

7500

750010000

5515000

5010

5010

5010

125

110130

5080

125

110130

8050

9000

900012000

18000

10000

1000013500

9020000

125

110130

8050

12500

1250015000

9025000

ANSI CLASS (C29.2 - 1992) 52-3

11 13/167 3/4

8255

52-352-3

8256 8257

52-5

8258

5 3/4"

10 3/4"

RADIO INFLUENCE VOLTAGE DATA

Critical impulse flashover, negative

Maximum RIV at 1000 kHz, µVLow-frequency test voltage, RMS to ground

Low-frequency puncture voltage

MECHANICAL VALUES

Leakage distance

Low-frequency wet flashover

Low-frequency dry flashover

Mech, impact strength,inch.poundsCombined M & E strength, pounds

Routine proof test load, poundsTime load test value, pounds

Critical impulse flashover, positive

ELECTRICAL VALUES, kV

Dry arcing distance

CRITICAL DISTANCES, inches

CATALOG REFERENCE NUMBER

Maximum working load, pounds

Note 3: The insulators can be requested with zinc sleeve ball bolt for contaminated areas

Note 2: The insulators can be requested with extra hot-dip galvanized layer in caps and bolts for contaminated areas

Note 1: ANSI 70 gray is standard. Brown available by request

11 13/167 3/4

11 13/167 3/4

11 13/167 3/4

55

Page 16: Gamma Insulators

Clevis TypeSuspension Insulators

Note 3: Part numbers 8265 and 8267, can be requested with zinc sleeve ball bolt for contaminated areas

Note 1: ANSI 70 gray is standard. Brown available by request

Note 2: The insulators can be requested with extra hot-dip galvanized layer in caps and bolts for contaminated areas

110

5010

5080

125130

7500

15000

100007500

55

52-4

7 3/411 13/16

8265

110

1050

50125130

80

1000090

1350010000

20000

7 3/411 13/16

52-4

8267

Note 4: Part number 8267 comform to ANSI Class 52-4 specifications. However it carry higher strengh rating than that

required by standard

RADIO INFLUENCE VOLTAGE DATA

Critical impulse flashover, negative

Maximum RIV at 1000 kHz, µVLow-frequency test voltage, RMS to ground

Low-frequency puncture voltage

MECHANICAL VALUES

Leakage distance

Low-frequency wet flashoverLow-frequency dry flashover

Mech, impact strength,inch.poundsCombined M & E strength, pounds

Routine proof test load, poundsTime load test value, pounds

Critical impulse flashover, positive

ELECTRICAL VALUES, kV

Dry arcing distance

CRITICAL DISTANCES, inches

ANSI CLASS (C29.2- 1992)

CATALOG REFERENCE NUMBER

Maximum, working load, pounds

5 3/4"

10 3/4"

1/2"

11/16"

11/16"

5/8"

11/16"

Page 17: Gamma Insulators

FOG Ball and Socket typeSuspension Insulators

Note 3: The insulators can be requested with zinc sleeve ball bolt for contaminated areas

5010

150

130160

60100

900012000

9018000

5010

5010

150

130160

10060

150

130160

60100

1000013500

2000090

1250015000

9025000

917

8250

917

917

8251 8252

5 3/4"

10 3/4"

9000 10000 12500

Note 2: The insulators can be requested with extra hot-dip galvanized layer in caps and bolts for contaminated areas

Note 1: ANSI 70 gray is standard. Brown available by request

RADIO INFLUENCE VOLTAGE DATA

Critical impulse flashover, negative

Maximum RIV at 1000 kHz, µVLow-frequency test voltage, RMS to ground

Low-frequency puncture voltage

MECHANICAL VALUES

Leakage distance

Low-frequency wet flashoverLow-frequency dry flashover

Mech, impact strength,inch.poundsCombined M & E strength, pounds

Routine proof test load, poundsTime load test value, pounds

Critical impulse flashover, positive

ELECTRICAL VALUES, kV

Dry arcing distance

CRITICAL DISTANCES, inches

CATALOG REFERENCE NUMBER

Maximum working load, pounds

Page 18: Gamma Insulators

130

100

150160

25000

12500

8262

5010

5010

5010

150

130160

10060

900012000

9018000

150

130160

60100

60

1000013500

9020000

15000

90

917

8260 8261

5/8"

10 3/4"

5 3/4"

125009000 10000

FOG Clevis typeSuspension Insulators

Note 3: The insulators can be requested with zinc sleeve ball bolt for contaminated areas

Note 2: The insulators can be requested with extra hot-dip galvanized layer in caps and bolts for contaminated areas

Note 1: ANSI 70 gray is standard. Brown available by request

RADIO INFLUENCE VOLTAGE DATA

Critical impulse flashover, negative

Maximum RIV at 1000 kHz, µVLow-frequency test voltage, RMS to ground

Low-frequency puncture voltage

MECHANICAL VALUES

Leakage distance

Low-frequency wet flashoverLow-frequency dry flashover

Mech, impact strength,inch.pounds)Combined M & E strength, pounds

Routine proof test load, poundsTime load test value, pounds

Critical impulse flashover, positive

ELECTRICAL VALUES, kV

Dry arcing distance

CRITICAL DISTANCES, inches

CATALOG REFERENCE NUMBER

Maximum working load, pounds

917

917

1/2"

11/6"

11/6"

Page 19: Gamma Insulators

Spools

Page 20: Gamma Insulators

SpoolInsulators

CATALOG REFERENCE NUMBER

ANSI CLASS (C29.3-1986 rev. 2002)

Transverse strength

MECHANICAL VALUES, pounds

ELECTRICAL VALUES, kV

53-1

2000

810

8441-70

Low-frequency dry flashoverLow-frequency wet flashover, verticalLow-frequency wet flashover, horizontal

Note: ANSI 70 gray is standard. Brown or white available by request

20

53-2

1215

8442-70

25

3000

53-5

1825

320141-70

35

53-3

1215

8443-70

25

4000

53-4

1215

8444-70

25

4500

-

1012

320333-70

22

3000 6000

8441-70

2 1/4”

1 3/4”

7/8”

11/16”

R 7/16”

2 1

/8”

8443-70

3”

1 3/4”

15/16”

3/4

R 7/16”

3 3

/16

11/16”

8444-70 320141-70

4 1

/8”

1”

2 7/8”

4”

15/16”

R 7/16”

11/16”

320333-70

13/4”

3/4

R 3/8”

3”

45/64”

3”

15/16”

8442-70

3 1/8”

1 3/4”

15/16”

3/4

R 11/16”

11/16”

3”

|

4 1/8”

2 7/8”

15/16”

R 5/8”

3”

3/4

11/16”

Page 21: Gamma Insulators

Guy Strains

Page 22: Gamma Insulators

CATALOG REFERENCE NUMBER

ANSI CLASS (C29.4-1989 rev. 2002) 54-1

1 5/8

8502-70

Low-frequency dry flashover

Note: ANSI 70 gray is standard. Brown available by request

10000

54-2

8504-70

12000

1 7/8

54-3

8506-70

20000

54-4

25 30 35 4012 15 18 23

8451-70

20000

2 1/4 3

CRITICAL DISTANCES, inchesLeakage distance

MECHANICAL VALUES, poundsTensile strength

ELECTRICAL VALUES, kV

Low-frequency wet flashover

Guy StrainInsulators

|

8502-70 8504-70

8506-70 8451-70

1 3/4"

2 1/2"

1 3/4"

3 1/2" 2 1/2"

5/8"

2 7/8"

2 1/8"4 1/4"

2 1/4"

3"

7/8"

2 3/8"

3 3/8"

5 1/2"

3 1/8"

1"

4 1/16"

3 1/2"

2 3/8"

6 3/4"

2 5/8"

1"

4 1/2"

Page 23: Gamma Insulators

Pins

Page 24: Gamma Insulators

Low - Medium Voltage PinInsulators

Note 2: Conductive Glaze - applied to head, side wire grooves and pin hole of one-piece unitsNote 3: Neck Sizes - “C” & “F” conform to industry standardsNote 4: Pin Hole Sizes - Standard 1” to 15 kV and ref. 320275R-70, 1 3/8” for the rest of 23 kV & 35 kV units

Low-frequency test voltage, RMS to ground, kVRADIO INFLUENCE VOLTAGE DATA

Maximum RIV at 1000 kHz, µV

Note 1: ANSI 70 gray is standard. Brown or white available by request

CATALOG REFERENCE NUMBER

ANSI CLASS (C29.5-1984 rev. 2002)

CRITICAL DISTANCES, inches

55-2

6188R-70

Dry arcing distanceLeakage distanceMinimum pin height

MECHANICAL VALUES, poundsCantilever strength

ELECTRICAL VALUES, kV

Low-frequency puncture voltageCritical impulse flashover, negative

Typical application voltageLow-frequency dry flashoverLow-frequency wet flashoverCritical impulse flashover, positive

6184R-70 6184RA-70 6183R-70 7061R-70

4 1/27

4

2500

7.2452570

70

10100

55-3 55-3 55-4 55-5

3 3/8 4 1/2 5 6 1/45 7 9 12

5 5 5 6

2500 2500 3000 3000

85

550

11.5 1513.211.5553090

11090

553090

11090

6535

10513095

8045

130150115

10 10 1550 50 50

6184RA-70

3 3/8”

3 3/4”

4 3/4”

2 1/4”

R 1 7/10”

R 9/16”

7061R-706183R-70

6184R-706188R-70

|

3 1/2"

2 1/4"

3 1/4" 1 1/2"

3 3/4"

R 5/8"

R 5/8"

3 3/8"

4 3/4"

3 3/4" 1 1/2"

2 1/4"

R 6/10"

R9/16"

4"

4 3/8" 1 3/4"

5 19/32"

2 7/8"

R 9/16"

R 1"

4 7/8" 2"

RF 1"

RF 9/16"

4"

2 7/8"

7"

Page 25: Gamma Insulators

Low-frequency test voltage, RMS to ground, kVRADIO INFLUENCE VOLTAGE DATA

Maximum RIV at 1000 kHz, µV

Note 1: ANSI 70 gray is standard. Brown available by request

CATALOG REFERENCE NUMBER

ANSI CLASS (C29.5-1984 rev. 2002 / C29.6-1996 rev. 2002)

CRITICAL DISTANCES, inchesDry arcing distanceLeakage distanceMinimum pin height

MECHANICAL VALUES, poundsCantilever strength

ELECTRICAL VALUES, kV

Low-frequency puncture voltageCritical impulse flashover, negative

Typical application voltageLow-frequency dry flashoverLow-frequency wet flashoverCritical impulse flashover, positive

320275R-70 8248R-70 10435R-70 8190R-70

815

22200

55-6 56-1 56-2 56-3

7 8 1/4 9 1/2 13 17 21

7 1/2 6 7 8

3000 2500 3000 3000

23 34.5232310050

150170135

9560

150190130

11070

175225145

12580

200265165

15 22 30100 100 100

Note 2: Conductive Glaze - applied to head, side wire grooves and pin hole of one-piece unitsNote 3: Neck Sizes - “C” & “F” conform to industry standardsNote 4: Pin Hole Sizes - Standard 1” to 15 kV and ref. 320275R-70, 1 3/8” for the rest of 23 kV & 35 kV units

320275R-70 8248R-70

4 5/8”

R 3/4”R 3/4”

R 9/16”

5 3/4”2”

10435R-70

4”

R 3/4”

R 9/16”

2”

9”

5 1/8”

8190R-70

5 1/4”

R 3/4”

R 9/16”

2”

4”

|

High Voltage PinInsulators

4 3/4"3 1/2"

R 1"

5 1/2" 2 1/4"

R 5/8"

8 3/8"

3 1/2”

Page 26: Gamma Insulators

Posts

Page 27: Gamma Insulators

CATALOG REFERENCE NUMBER

CRITICAL DISTANCES, inches

MECHANICAL VALUES, pounds

ELECTRICAL VALUES, kV

RADIO INFLUENCE VOLTAGE DATA

320331-70

Dry arcing distance 9Leakage distance 15.5

Cantilever strength 3000

Typical application voltage 25Low-frequency dry flashover 100Low-frequency wet flashover 70Critical impulse flashover, positiveCritical impulse flashover, negativeLow voltage puncture voltage

155190160

Low-frequency test voltage, RMS to ground, kV 20Maximum RIV at 1000 kHz, µV 100

Note: ANSI 70 gray is standard. Brown available by request

320331-70

2 7/8”

6”

1”

R 1”

R 3/4”

7 1/2”

|

PinpostInsulators

Page 28: Gamma Insulators

CATALOG REFERENCE NUMBER

CRITICAL DISTANCES, inches

MECHANICAL VALUES, pounds

ELECTRICAL VALUES, kV

RADIO INFLUENCE VOLTAGE DATA

Dry arcing distance 5 5 3/4 7 5/8Leakage distance 7 1/2 11 15

Cantilever strength 2000 2000 1500

Typical application voltage 15 20 27Low-frequency dry flashover 65 80 95Low-frequency wet flashover 40 55 65Critical impulse flashover, positive 100 110 140

Low-frequency test voltage, RMS to ground, kV 10 15 20Maximum RIV at 1000 kHz, µV 50 50 50

Note 1: ANSI 70 gray is standard. Brown available by requestNote 2: Available with short or long stud, sold separately

4315PX-704315X-70

4320PX-704320X-70

4327PX-704327X-70 4335X-70

4335PX-70

8.2718.21

1000

3511080

165

22100

4327PX-70 4327X-70

5 5/32”

9 11/16”

2 1/4”

3/4” - 10 UF

R 1”

R 1”

5 5/32”

9 11/16”

2 7/8”

3/4” - 10 UF

R 1”

R 1”

4320PX-70 4320X-70

5”

9”

3/4” - 10 UF

2 1/4”

R 1”

R 1”

9"

5”

2 7/8”

3/4” - 10 UF

R 1”

R 1”

4315X-70 4315PX-70

4 4/5”

7.8”

2 7/8”

3/4” - 10 UF

R 1”

R 1”

4 4/5”

7.6”

3/4” - 10 UF

2 1/4”

R 1”

R 1”

R1"

R1"

3/4 - 10 UF

11"

2 9/10"

4 5/10"

4335PX-704335X-70

11"

3/4 - 10 UF

2 2/10

5 2/10

R1"

R1"

C Neck F Neck

C Neck F Neck

C Neck F Neck C Neck F Neck

|

Distribution PostInsulators

Page 29: Gamma Insulators

Tie Top Line PostInsulators

57-1

CATALOG REFERENCE NUMBER

CRITICAL DISTANCES, inches

MECHANICAL VALUES, pounds

ELECTRICAL VALUES, kV

RADIO INFLUENCE VOLTAGE DATA

9325X-70

Dry arcing distance 6.5 9.5 12.2Leakage distance 14 22.5 29.5

Cantilever strength 2800 2800 2800

Typical application voltage 25 35 46Low-frequency dry flashover 90 115 135Low-frequency wet flashover 60 70 100Critical impulse flashover, positive 130 179 214

57-2

9335X-70

57-3

9345X-70

ANSI CLASS (C29.7-1996 rev. 2002)

Low-frequency test voltage, RMS to ground, kV 15 22 30Maximum RIV at 1000 kHz, µV 100 100 200

9325X-70

9335X-70 9345X-70

Note 1: ANSI 70 gray is standard, Brown abailable by request

Note 2: The insulators can be requested with M20 thread

Note 3: Available with short or long stud, sold separately

|

2 7/8"

5 7/8"

R 1"

9 3/16"

3/4"-10 UF

R 1"

6 1/8"

R 1"

12 7/16"

3/4"/10 UF

2 7/8"

R 1"

6 5/16"

2 7/8"

R 1"

15"

3/4"-10 UF

R 1"

Page 30: Gamma Insulators

CATALOG REFERENCE NUMBER

CRITICAL DISTANCES, inches

MECHANICAL VALUES, pounds

ELECTRICAL VALUES, kV

RADIO INFLUENCE VOLTAGE DATA

Dry arcing distance 14.5 17.25Leakage distance 40 45

Cantilever strength 2800 2800

Typical application voltage 55 66Low-frequency dry flashover 140 160Low-frequency wet flashover 110 130Critical impulse flashover, positive 230 265

57-4

8416X-70

57-5

8417X-70

ANSI CLASS (C29.7-1996 rev. 2002)

Low-frequency test voltage, RMS to ground, kV 44 44Maximum RIV at 1000 kHz, µV 200 200

Note 1: ANSI 70 gray is standard, Brown abailable by request

Note 2: The insulators can be requested with M20 thread

Note 3: Available with short or long stud, sold separately

8417X-70

7 1/2"

6"

21 1

/4"

3/4” - 10 UF

8416X-70

1 1/2"

1 1/2"

7"

6"

20

1/4

"

3/4” - 10 UF

Tie Top Line PostInsulators

Page 31: Gamma Insulators

Clamp Tops

Page 32: Gamma Insulators

CATALOG REFERENCE NUMBER

CRITICAL DISTANCES, inches

MECHANICAL VALUES, pounds

ELECTRICAL VALUES, kV

RADIO INFLUENCE VOLTAGE DATA

Dry arcing distance 5 6.5 9.5 12.25Leakage distance 10 14 22 29

Cantilever strength 2800 2800 2800 2800

Typical application voltage 20 25 35 45Low-frequency dry flashover 70 80 110 125Low-frequency wet flashover 50 60 85 100Critical impulse flashover, positive 100 130 180 210

Note 1: ANSI 70 gray is standard. Brown available by request

Low-frequency test voltage, RMS to ground, kV 15 15 22 30Maximum RIV at 1000 kHz, µV 50 100 100 200

Note 2: LN = Lock nut / LNC= Lock nut with trunnion bolt

4220 LN-704220-70

4220 LNC-704225 LN-70

4225-70

4225 LNC-704235 LN-70

4235-70

4235 LNC-704245 LN-70

4245-70

4245 LNC-70

ANSI CLASS (C29.7-1996 rev. 2002)

Tensión strength 5000 5000 5000 5000

- 57-11 57-12 57-13

Note 3: Available with short or long stud, sold separately

4220-70

5/8” - 11 NC

5 13/16” 9 5/16”

3/4” - 10 UF

4225-70

5/8” - 11 NC

3/4” - 10 UF

6 1/8”

10 43/64”

4235-70

5/8” - 11 NC

3/4” - 10 UF

6 3/8”

14 5/64”

4245-70

3/4” - 10 UF

5/8” - 11 NC

6 5/8”

16 5/8”

|

Clamp TopInsulators

Page 33: Gamma Insulators

Station Post

Page 34: Gamma Insulators

GAMMA Porcelain Station Post Insulators

Designed to meet and exceed ANSI specifications, Gamma's porcelain Station Post Insulators

conform to the most current industry standards* for the greatest degree of flexibility and

consistency. However, that's where being “Standard” ends.

GAMMA MANUFACTURES ITS OWN PRODUCTS!! Gamma does not use subcontractors to

manufacture and brand label its product. Instead we use state of the art equipment and

processes to produce high quality porcelain Station Post Insulators, consistently, every time.

In addition, Gamma has the unique ability to control nearly every step of the process. In

conjunction with its parent company, “The Corona Group** we extract, transport, and process

much of the raw material used in our insulators. We employ the engineering and technical

expertise required to support our products, and own the equipment necessary to ensure our

porcelain Station Post Insulators meets our high standards for quality and conformance.

Gamma's start to finish process ownership, state of the art manufacturing, and world class

technical capabilities produces porcelain Station Post that utilities can rely on with confidence.

There is no mystery or guesses about where your Gamma Station Post Insulators come from,

they come from GAMMA!

*Standards

Gamma Station Post Insulators conform to

ANSI (C29.1 and C29.9)

**Gamma Insulators Corporation….

is the electrical grade insulator division of THE CORONA GROUP, a 125 year old multinational

corporation with sales in excess of $1.5 billion annually. Corona's state of the art manufacturing

facilities utilize the latest manufacturing technologies, and are all certified to the most recent

ISO 9001, 14001, and OHSAS 18001 standards. We employ world class manufacturing tools and

management systems such as TPM, Lean Manufacturing, DFSS, and Six Sigma, to name a few, in

order to produce the high quality products you've come to expect from Corona Companies.

Page 35: Gamma Insulators

Station PostInsulators

700010000

600010000

2000

7000

1053095

550

ANSI CLASS (C29.9 - 1983) TR-202

CATALOG NUMBER

50

TR-205

8420

2000

8500

12545

110

10

8425

Leakage distance 10 1/2 15 1/2

15Voltage class 7.5

Note 1: Brown glaze or ANSI 70 gray glaze

Note 2: The insulators can be requested with M12 thread

Low frequency withstand, 10 sec. wet

Maximum RIV at 1000 kHz, µVLow frequency test voltage, RMS to ground, kV

Impulse flashover, positive

Cantilever strength, upright, pounds

Tensile strength, poundsTorsion strength, inch - poundsCompression strength, pounds

Impulse withstand

DIMENSIONS, inches

MECHANICAL VALUES

ELECTRICAL VALUES, kV

RADIO INFLUENCE VOLTAGE DATA

Cantilever strength, underhung, pounds 2000 2000

4 THREADØ ½" - 13NC

4 1/4"

3"

7"

7 1/2"

8420

4 THREADØ ½" - 13NC

4 1/4"

3"

7"

10"

8425

4 1/4"

3"

6 1/2"

4 THREADØ ½" - 13NC

14"

8428

8428

800010000

100

TR-208

2000

10000

15

24

15060

17023

2000

1000015000

2000

12000

22580

200

22100

TR-210

8430

37

34.5

2000

3"

4 1/4"

7 1/2"

4 THREADØ ½" - 13NC

18"

8430

Page 36: Gamma Insulators

Small Station PostInsulator

45 50 60

CATALOG NUMBER 8608 8609 8610

Note: ANSI 70 gray is standard. Brown available by request

Low-frequency withstand, 10 sec. wet

Cantilever strength, pounds

CRITICAL DISTANCES, inches

MECHANICAL VALUES

ELECTRICAL VALUES, kV

Tensile strength, poundsTorsion strenght, inch-poundsCompression strenght, pounds

Leakage distance 17 1/2 20 7/8 24 3/8

12001200

3030

86078606

5000500050003000500010000

14 1/413 9/16

1000 9005000 50005000 30005000 5000

1000500050005000

3/8-16 Thread(Galv. Steel) TYP

10"

Ø3 7/10"

1"

2 1/4"

Ø5 1/2"

8610

3/8-16 Thread(Galv. Steel) TYP

9"

Ø3 7/10"

1"

2 1/4"

Ø5 1/2"

8609

Ø3 7/10"

1"

7"8"

3/8-16 Thread(Galv. Steel) TYP

3/8-16 Thread(Galv. Steel) TYP

2 1/4"

Ø5 1/2"

Ø3 7/10"

1"

6 3/4"

3/8-16 Thread(Galv. Steel) TYP

2 1/4"

Ø5 1/2"

Ø3 7/10"

1"

2 1/4"

Ø5 1/2"

860886078606

Page 37: Gamma Insulators

Studs

Page 38: Gamma Insulators

V-010187A

3/4”2.25sq x 0.81 x 0.19

3/4”3/4”

Wood crossarm

CATALOG NUMBER

1 Med type positive lock washer

ACCESORIES

1 Square Washer 1 Standard square nut 1 Lock nut

Notes:

Dimensions in inches

Rating, kV: 35, 45, 55, 66

0.06 FLATBEARINGSURFACE

Ø1.25

SERRATEDSURFACE

R 0.06

1.02

0.81

0.62

3/4 - 10

4.00

3/4” - 10

0.05

0.17

8.75

7.560.19

0.78 (25/32”)HEX MUST PASS

Ø0.81 HOLE

SECTION A - A

Material: C-1038 steelMinimun Brinnell 143Hot dip galvanized

Line Post Long StudFittings

A

A

Page 39: Gamma Insulators

V-011612A

3/4”2 x 2 x 11/16 x 1/8

5/8”5/8”

Wood crossarm

CATALOG NUMBER

1 Med type positive lock washerACCESORIES

1 Square Washer 1 Regular square nut 1 Lock nut

Notes:

Dimensions in inches

Rating, kV: 15, 20, 25

3/4 - 10

1.02

0.81

5/8 - 11

4.0

8.75

0.65REF.

Material: C-1038 steelMinimun Brinnell 143Hot dip galvanized

Line Post Long StudFittings

Ø1.25

SERRATEDSURFACE

A

ASECTION A - A

Page 40: Gamma Insulators

V-74739

3/4”5/8”

2.25 x 2.25 x 0.69 x 0.19

5/8”

Metal crossarm

CATALOG NUMBER

1 LT type positive lock washerACCESORIES

1 LT type positive lock washer 1 Square washer 1 Regular hexagonal nut

Notes:

Dimensions in inches

Rating, kV: 15,20, 25

R 0.06

1.02

0.81

1.56

0.38

5/8” - 11

3/4” - 10

0.05

0.17

3.38

2.195/8” - 11 NUT MUSTPASS OVER HEX.

CORNERS AFTER GALV.

0.44MUST FIT

7/16 WRENCH

Material: C-1038 steelMinimun Brinnell 143Hot dip galvanized

Line Post Short StudFittings

Ø1.25

SERRATEDSURFACE

Page 41: Gamma Insulators

V-301613

3/4”5/8”5/8”

Metal crossarm

CATALOG NUMBER

1 Med type positive lock washerACCESORIES

1 Med type positive lock washer 1 Regular hexagonal nut

Notes:

Dimensions in inches

Rating, kV: 15, 20, 25

R 0.06

1.02

0.811.56 0.38

5/8” - 11

3/4” - 10

0.05

0.17

3.38

2.19 5/8” - 11 NUT MUSTPASS OVER HEX.

CORNERS AFTER GALV.

Material: C-1038 steelMinimun Brinnell 143Hot dip galvanized

Line Post Short StudFittings

0.06 FLATBEARINGSURFACE

Ø1.25

SERRATEDSURFACE

0.44MUST FIT

7/16 WRENCH

Page 42: Gamma Insulators

V-301614

3/4”3/4”

Metal crossarm

CATALOG NUMBER

2 Med type positive lock washerACCESORIES

2 Regular hexagonal nut

Notes:

Dimensions in inches

Rating, kV: 35, 45, 55, 66

Ø1.25

SERRATEDSURFACE

R 0.06

1.02

0.81

1.56

0.12

0.50

3/4” - 10 THREADBOTH ENDS0.05

0.17

3.38

2.19 3/4” - 10 NUT MUSTPASS OVER HEX.

CORNERS

0.56MUST FIT

9/16 WRENCH

0.06 FLATBEARINGSURFACE

Material: C-1038 steelMinimun Brinnell 143Hot dip galvanized

Line Post Short StudFittings

Page 43: Gamma Insulators

V-301616

7/8”7/8”

Metal crossarm

CATALOG NUMBER

2 Lt type positive lock washerACCESORIES

1 Regular hexagonal nut

Notes:

Dimensions in inches

Rating, kV: 88Material: C-1038 steelMinimun Brinnell 143Hot dip galvanized

R 0.06

1.19

1.06

2.81

0.25 0.38

7/8” - 9 THREAD

7/8” - 9 THREAD

0.05

0.17

4.80

3.44 7/8” - 9 NUT MUSTPASS OVER HEX.

CORNERS

0.62MUST FIT

5/8 WRENCH

Line Post Short StudFittings

Ø1.25

SERRATEDSURFACE

0.06 FLATBEARINGSURFACE

Page 44: Gamma Insulators

Fiberglass

Guy Strain

Page 45: Gamma Insulators

GS15 - SeriesFiberglass Guy Strain Insulators

GS1512-XXGS1518-XXGS1524-XXGS1530-XXGS1536-XXGS1542-XXGS1554-XXGS1560-XXGS1578-XXGS1590-XXGS1596-XX

GS15120-XXGS15144-XX

15000 (67) 12" (305)15000 (67) 18" (457)15000 (67) 24" (610)15000 (67) 30" (762)15000 (67) 36" (914)15000 (67) 42" (1067)15000 (67) 54" (1372)15000 (67) 60" (1524)15000 (67) 78" (1981)15000 (67) 90" (2286)15000 (67) 96" (2438)15000 (67) 120" (3048)15000 (67) 144" (3657)

“L”

15.8

8

“RL” STICK

GM

GM

“L” ASSEMBLY

CATALOG NUMBER LENGTH L, inches (mm)MECHANICAL STRENGTH CLASS, lbs (KN)

Note 1: XX code is the type of cast ductile iron, hot dip galvanized end fittings.

T: Thimble Eye

C: Clevis with pin and clip

R: Clevis with roller pin and clip

Example: TC (Thimble eye - Clevis with pin and clip) end

Page 46: Gamma Insulators

GAMMA Insulators Corpwww.gammainsulators.com

www.gamma.com.co