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Contact Supplier| Rated Insulation level | Highest voltage for equipment kV | Rated separate source AC withstand voltage kV(r.m.s) | Rated lightning impulse withstand voltage kV(peak) |
|---|---|---|---|
| (a)Tapchanger to ground | 12 | 28 | 75 |
| (b)Between phases | 28 | 75 | |
| (c)Over tapping range | 8 | 25 | |
| (d)Between adjacent contacts | 8 | 25 | |
| (e)Between contacts of pre selector | 8 | 25 | |
| Weight of tap changer | 380 kg | ||