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This series of indoor high-voltage vacuum breaker(VCB) is applicable for the electric system, control and protect the power supply and distribution in the industrial and mining enterprises, which is three-phase AC 50HZ, 12KV and other frequent operating places. Its characters are as follows: fast recovery speed of medium strength, high insulting strength, low rate of electric, long endurance, low maintenance energy, no explosion, no pollution, low noise and high applicability and so on..
Main technical parameters | |||||
Rated voltage | KV | 10 | Rated short-circuit duration time | S | 4 |
The highest voltage | KV | 11.5 | Times of rated short-circuit breaking current times | Times | 30 |
Rated short-time frequency endurable voltage | KV | 42 | Breaking times of rated current | Times | 1000 |
Rated lightning impulse endurable voltage( peak voltage) | KV | 75 | Mechanical life | Times | 1000 |
Rated current | A | 630 1250 1600 | Time of reclosing automatically without current | S | 0.3 |
Rated short-circuit breaking current | KA | 12.5 20 31.5 | Reclosing time | S | 0.1 |
Rated short-circuit opening current( peak) | KA | 31.25 50 80 | Opening time | S | 0.06 |
Rated peak endurable current | KA | 31.25 50 80 | Dimensions(width* depth* height) | mm | 768*447*574 |
Rated short-time endurable current | KA | 12.5 20 31.5 | Weight | kg | 100 |
ZN28A -12 indoor high-voltage vacuum circuit breaker(VCB)