Pin Insulator for High Voltage
The specification of the porcelain insulator as follows:
| Type | 55-1 | 55-2 | 55-3 | 55-4 | 55-5 | |
| Creepage distance | 102 | 127 | 178 | 229 | 305 | |
| Dry arcing distance | 57 | 86 | 114 | 127 | 159 | |
| Cantilellvler strength | 13 | 11 | 11 | 13 | 13 | |
| Lowe frequency dry flashover voltage | 35 | 45 | 56 | 65 | 80 | |
| Lowe frequency wet flashover voltage | 20 | 25 | 30 | 35 | 45 | |
| Critical impulse flashover pos | 50 | 70 | 90 | 105 | 130 | |
| Critical impulse flashover Neg | 70 | 85 | 110 | 130 | 150 | |
| Power-freequency puncture voltage | 50 | 70 | 90 | 95 | 115 | |
| Test voltage to ground | 5 | 5 | 10 | 10 | 15 | |
| Maximum RIV at 1,000KHZ | 50 | 50 | 50 | 50 | 100 | |
| Net weight eash APPROX | 0.5 | 0.65 | 1 | 1.55 | 2.75 | |
| Number in standard package | 60 | 40 | 30 | 16 | 12 | |
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