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porcelain line post insulators
- line post insulators are manufactured and tested to the requirements of ANSI Standard C29.7
- Color:brown and gray
MAIN DIMENSTIONS AND STANDARD PARTICULARS
|
ANSI Class |
57 -31 |
57-32 |
57-33 |
57-34 |
57-35 |
||
|
Fig. No. |
1 |
2 |
3 |
4 |
5 |
||
|
Leakage distance/ mm |
356 |
559 |
737 |
1016 |
1143 |
||
|
Dry arcing distance/ mm |
165 |
241 |
311 |
368 |
438 |
||
|
Cantilever strength/ kN |
12.5 |
12.5 |
12.5 |
12.5 |
12.5 |
||
|
Average flashover voltage |
Low-frequency |
Dry/kV |
70 |
100 |
125 |
140 |
160 |
|
Wet/kV |
50 |
70 |
95 |
110 |
130 |
||
|
Critical-impulse |
Positive/ kV |
120 |
160 |
200 |
230 |
265 |
|
|
Negative/ kV |
155 |
205 |
260 |
340 |
380 |
||
|
Radio-influence voltage date |
Test voltage to Ground/ kV |
15 |
22 |
30 |
44 |
44 |
|
|
Maximum RIV at 1.000kc/μV |
100 |
100 |
200 |
200 |
200 |
||
|
Net weight each approx./kg |
9.5 |
12.5 |
15.7 |
18.8 |
21.5 |
||
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