Pin Insulator is earliest developed overhead insulator, but still popularly used in power network up to 33 KV system. Pin type insulator can be one part, two parts or three parts type, depending upon application voltage. In 11 KV system ,we generally use one part type insulator where whole pin insulator is one piece of properly shaped porcelain or glass.
Pin type porcelain insulators | ||||||
ANSI Class | | 56-1 | 56-2 | 56-3 | 56-4 | 56-5 |
Dimensions | ||||||
Diameter | mm | 191 | 229 | 267 | 305 | 343 |
Height | mm | 146 | 165 | 191 | 241 | 318 |
Creepage distance | mm | 330 | 432 | 533 | 686 | 865 |
Dry arcing distance | mm | 178 | 210 | 241 | 286 | 356 |
Minimum pin height | mm | 152 | 178 | 203 | 254 | 254 |
Mechanical Values | ||||||
Cantilever strength | kn | 11.4 | 13.6 | 13.6 | 13.6 | 13.6 |
Electrical Values | ||||||
Type application voltage | kv | 23 | 23 | 34.5 | 46 | 44 |
Low frequency dry flashover voltage | kv | 95 | 110 | 125 | 140 | 175 |
Low frequency wet flashover voltage | kv | 60 | 70 | 80 | 95 | 125 |
Critical impulse flashover voltage,positive | kv | 150 | 175 | 205 | 225 | 270 |
Critical impulse flashover voltage,negative | kv | 190 | 225 | 265 | 310 | 340 |
Low frequency puncture voltage | kv | 130 | 145 | 165 | 185 | 225 |
Radio influence Voltage Data | ||||||
Test voltage RMS to ground | kv | 15 | 22 | 30 | 30 | 44 |
Maximum RIV at 1000kHz | μv | 100 | 100 | 200 | 200 | 200 |
Packing and Shipping Data | ||||||
Net weight,approximate | kg | 3.5 | 5.6 | 8.5 | 10.8 | 13.5 |
