57 Series Vertical Clamp Type and Horizontal Clamp Type Porcelain Insulator
product detail
Line Post Insulator
57 Series Vertical Clamp Type and Horizontal Clamp Type
Standard: IEC60383, ANSI C29.1, ANSI C29.7
Voltage:15-45kV
Vertical clamp type line post mounted upright on crossarms and structures
Horizontal clamp type line post assemblies for ratings 15 kV through 45 kV.
ANSI CLASS |
57-11 |
57-21 |
57-12 |
57-22 |
57-13 |
57-23 |
Creepage Distance (mm) |
356 |
356 |
559 |
559 |
737 |
737 |
H - Height To Middle of Clamp Assembly |
257 |
276 |
333 |
352 |
400 |
419 |
D - Diameter |
146 |
146 |
160 |
160 |
160 |
160 |
C - Clamp Throat Width |
102 |
102 |
102 |
102 |
102 |
102 |
Dry Arcing Distance(mm) |
165 |
165 |
241 |
241 |
311 |
311 |
Cantilever Strength(kN) |
12.5 |
12.5 |
12.5 |
12.5 |
12.5 |
12.5 |
Low Frequency Flashover Voltage-Dry(kV) |
70 |
70 |
100 |
100 |
125 |
125 |
Low Frequency Flashover Voltage-Wet(kV) |
50 |
50 |
70 |
70 |
95 |
95 |
Critical Impulse Flashover Voltage-Pos.,(kV) |
120 |
120 |
160 |
160 |
200 |
200 |
Test Voltage to Ground(kV) |
15 |
15 |
22 |
22 |
30 |
30 |
Maximum RIV at 1000KHZ(μv) |
100 |
100 |
100 |
100 |
200 |
200 |