Specifications form
Ceramic ANSI 57-3 Line Post Insulator 11KV 33KV
ANSI CLASS | With long stud | 57-1L | 57-2L | 57-3L | 57-4L | 57-5L |
With short stud | 57-1S | 57-2S | 57-3S | 57-4S | 57-5S | |
Fig. No. | 1 | 2 | 3 | 4 | 5 | |
Creepage Distance (mm) | 356 | 559 | 737 | 1016 | 1143 | |
Dry Arcing Distance (mm) | 165 | 241 | 311 | 368 | 430 | |
Cantilever Strength(kN) | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | |
Power Frequency Flashover Voltage | Dry /kV | 70 | 100 | 125 | 140 | 160 |
Wet/kV | 50 | 70 | 95 | 110 | 130 | |
Critical Impulse Flashover Voltage | Positive/kV | 120 | 160 | 200 | 230 | 265 |
Negative/kV | 155 | 205 | 260 | 340 | 380 | |
Radio Influence voltage | Test Voltage to ground/kV | 15 | 22 | 30 | 44 | 44 |
Maximum RIV at 1MHz/uV | 100 | 100 | 200 | 200 | 200 | |
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