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Porcelain Insulators

Pin Type Insulators

We offer high quality pin type insulators according to IEC ,ANSI,BS standards and customers' specifications .

Voltage class of pin type insulator can be made upto 33 KV ,10 KN.

Especially ANSI Standard pin insulator are in very good finish and high cantilever strength .

for example : 55-2,55-3,55-4,55-5 , 56-1,56-2,56-3,56-4,56-5 etc.

pin insulator 55 serials HIVOLT F.jpg


ANSI class 55-1 55-2 55-3 55-4 55-5
Insulator type Plain Radio Freed Plain Radio Freed Plain Radio Freed Plain Radio Freed Plain Radio Freed
Neck Designation C C C F F
Rating Voltage (U.S.Practice) /(kV) 7.2 7.2 / / /
Creepage   distance(in) 4 5 7 9 12
Dry-arcing   distance(in) 2-1/4 3-3/8 4-1/2 5 6-1/4
Minimum pin   height(in) 4 4 5 5 6
Dimensions D(in) 3-1/4 3-3/4 4-3/4 5-1/2 7
D2(in) 2-1/4±1/8 2-1/4±1/8 2-1/4±1/8 2-7/8±1/8 2-7/8±1/8
R(in) 1/2 5/8 9/16 9/16 9/16
R2(in) / 5/8 9/16 1 1
Cantilever   strength(lb) 3000 2500 2500 3000 3000
Low-frequency flashover voltage dry(kV) 35 35 50 45 65 55 70 65 85 80
wet(kV) 20 20 25 25 35 30 40 35 45 45
Critical impulse flashover voltage positive(kV) 50 50 75 70 100 90 110 105 140 130
negative(kV) 70 70 95 85 130 110 140 130 170 150
Low-frequency   puncture voltage(kV) 50 70 90 95 115
Radio-Influence Voltage Date test voltage,rms   to ground(kV) 5 5 5 5 10 10 10 10 15 15
maximum RIV at 1000kHz(μV) 2500 50 2500 50 5500 50 5500 50 8000 100


pin insulator 56 serials HIVOLT F.jpg

ANSI class 56-1 56-2 56-3 56-4 56-5
Neck Designation J K K / /
Voltage Rating (U.S.Practice) /(kV) 23 23 34.5 46 69
Creepage   distance(in) 13 17 21 27 864
Dry-arcing   distance(in) 6 8-1/4 9-1/2 11-1/4 356
Minimum pin   height(in) 5 7 8 10 318
D(in)
7-1/2 9 10-1/2 12 13-1/2
R(in)
9/16 9/16 9/16 9/16 9/16
R2(in)
3/4 3/4 3/4 3/4 3/4
Cantilever   strength(lb) 2500 3000 3000 3000 3000
Low-frequency flashover voltage dry(kV) 95 110 125 140 175
wet(kV) 60 70 80 95 125
Critical impulse flashover voltage positive(kV) 150 175 200 225 270
negative(kV) 190 255 265 310 340
Low-frequency   puncture voltage(kV) 130 145 165 185 225
Radio-Influence Voltage Date test voltage,rms   to ground(kV) 15 22 30 30 44
maximum RIV at 1000kHz(μV) 100 100 200 200 200


Download Files:
ANSI porcelain pin type insulator catalog.pdf
BS porcelain pin type insulator catalog.pdf
Other Standard porcelain pin type insulator catalog.pdf
Spool insulator Catalog.pdf
Strain insulator catalog.pdf
telephone insulator catalog.pdf