"Five Preventions" of High Voltage Switchgear

"Five Preventions" of High Voltage Switchgear

1. After the vacuum circuit breaker trolley in the high voltage switch cabinet is closed at the test position, the trolley circuit breaker cannot enter the working position. (Prevent closing with load)

2. When the grounding knife in the high-voltage switch cabinet is in the closed position, the trolley circuit breaker cannot be closed. (Prevent closing with ground wire)

3. When the vacuum circuit breaker in the high-voltage switch cabinet is closing, the back door of the cabinet is locked with the machine on the grounding knife. (Prevent the charging interval by mistake)

4. The vacuum circuit breaker in the high-voltage switchgear is closed when it is working, and the grounding knife cannot be put in. (Prevent the live ground wire from hanging)

5. The vacuum circuit breaker in the high-voltage switchgear cannot exit the working position of the trolley circuit breaker when it is closed. (Prevent load broach)