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. The switch cabinet is an electrical device. The external line enters the main control switch in the cabinet first, and then enters the sub-control switch, and each branch Set according to its needs. Such as instrumentation, automatic control, motor magnetic switch, various AC contactors, etc., some also have high-voltage room and low-voltage room switch cabinets, equipped with high-voltage busbars, such as power plants, etc., and some also have low-cycle protection for main equipment Load shedding.

Switchgear AC low-voltage power distribution cabinet is a new type of low-voltage power distribution cabinet designed in accordance with the requirements of the Ministry of Energy, the majority of power users and the design department, in accordance with the principles of safety, economy, reasonableness and reliability. The product has high breaking capacity and good dynamic thermal stability. , Flexible electrical scheme, convenient combination, series, strong practicability, novel structure, high protection level, etc. It can be used as an updated product of low-voltage switchgear.

When the grounding knife in the high-voltage switch cabinet is in the closed position, the trolley circuit breaker cannot be closed. When the vacuum circuit breaker in the high-voltage switch cabinet is closing, the back door of the panel is locked by the mechanism on the grounding knife and the cabinet door, and the high-voltage switch The vacuum circuit breaker in the cabinet is closed when it is working, and the grounding knife cannot be turned on. The vacuum circuit breaker in the high-voltage switch cabinet cannot exit the working position of the trolley circuit breaker when it is closed and running.