The switch cabinet is an electrical device. The outside of the switchgear cabinet first enters the main control switch in the cabinet, and then enters the sub-control switch. Each branch is set according to its needs. Such as instrumentation, automatic control, motor magnetic switch, various AC contactors, etc., some also set up high-voltage room and low-voltage room switchgear, with high-voltage busbars, such as power plants, and some also have a low-cycle to protect major equipment. Reducing load.

The main function of the switch cabinet is to open and close, control and protect the power equipment during the power generation, transmission, distribution and power conversion of the power system. The main components of the switch cabinet are circuit breakers, disconnectors, load switches, operating mechanisms, transformers, and various protection devices. There are many ways to classify switch cabinets. For example, circuit breaker installations can be divided into removable switch cabinets and fixed switch cabinets; or according to different cabinet structures, they can be divided into open switch cabinets, metal-enclosed switch cabinets, and metals. Closed armored switchgear; according to different voltage levels can be divided into high voltage switchgear, medium voltage switchgear and low voltage switchgear. It is mainly applicable to various occasions such as power plants, substations, petrochemicals, metallurgy rolling mills, light industry and textiles, factories and mines, residential quarters and high-rise buildings.