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There are static contact and busbar junction panel on the top of post insulator, and there are metal base, operating crank arm and operating insulator between post insulator and porcelain insulator base. The male contact is mounted on the base, and the CS8-5 manual operating mechanism connects with the male contact through the connecting bar, operating insulator and crank arm. It also can match with CJ6 dynamoelectric operating mechanism.
| Type | Rated voltage(KV) | Rated current(A) | Rated short time withstand current(KA/S) | Rated peak value withstand current(KA) | Power frequency withstand voltage(1min)(KV) | Thunder impulse withstand voltage(KV) |
| GW8-40.5 (W) | 40.5 | 400 | 8/3 | 20 | 80 | 185 |
| GW8-72.5(W) | 72.5 | 400 | 8/3 | 20 | 140 | 325 |
| GW8-126(W) | 126 | 400 | 8/3 | 20 | 185 | 450 |