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| ANSI line post insulators for high voltage
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| MAIN DIMENSIONS AND STANDARD PARTICULARS |
CLASS ANSI
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57-1S
57-1L |
57-2S
57-2L |
57-3S
57-3L |
57-4S
57-4L |
57-5S
57-5L |
| Fig No. |
3 |
4 |
5 |
1 |
2 |
| Main Dimansions of the pin mm |
M16 |
M20(M16) |
M20 |
M20 |
M20 |
| Creepage distance mm |
356 |
559 |
737 |
1015 |
1145 |
| Dry arcing distance mm |
165 |
241 |
311 |
368 |
438 |
| Cantilever strength kN |
12.5 |
12.5 |
12.5 |
12.5 |
12.5 |
| Low frequency flashover voltage |
Dry flashover kV |
80 |
110 |
125 |
150 |
175 |
| Wet flashover kV |
60 |
85 |
100 |
125 |
150 |
| Critical impulse flashover voltage |
Postive kV |
130 |
180 |
210 |
255 |
290 |
| Negative kV |
155 |
205 |
260 |
340 |
380 |
| Radio influence voltage data |
test voltage to ground kv |
15 |
22 |
30 |
44 |
44 |
| At 1000kHZ Max.RIV μ V |
100 |
100 |
300 |
200 |
200 |
| Weight(kg) |
5 |
9.8 |
12 |
16 |
18 |
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