(2) When the grounding knife in the high-voltage switchgear is closed, the trolley circuit breaker cannot be closed. (Use grounding wire to prevent closure)
(3) When the vacuum circuit breaker in the high-voltage switch cabinet is closed, the back door of the cabinet is mechanically locked with the grounding knife. (Prevent mistakes from entering the live range).
(4) The vacuum circuit breaker in the high-voltage switchgear is closed at work, and the grounding knife cannot be put into operation. (Prevent live grounding wire)
(5) The vacuum circuit breaker in the high-voltage switchgear can't quit the working position of the trolley circuit breaker when working and closing. (To prevent on-load broaching braking).