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Switch cabinet is a kind of electrical equipment, the switch cabinet is first inside the cabinet, and then enters the control switch, and each branch is set according to its needs.Such as instruments, automatic control, motor magnetic switch, all kinds of ac contactor, etc., some still have room of high pressure chamber and low pressure switch cabinet, equipped with high voltage bus, such as power plants, some still have to keep low cycle load shedding of the main equipment. The main function of switchgear is to conduct power generation, transmission, distribution and power conversion in the process of power generation, to control and protect electrical equipment.The components in the switch cabinet consist of circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protective devices.There are many ways to classify the switch cabinet, such as the way to install the switch cabinet and the fixed switch cabinet.Or, according to the different structure of the cabinet, can be divided into open and open cabinets, metal sealed open cabinets, and metal sealed and armored switch cabinets;According to different voltage grades, it can be divided into high voltage switch cabinet, medium voltage switch cabinet and low voltage switch cabinet.It is mainly applicable to power plant, substation, petrochemical, metallurgical rolling, light industrial textile, factory mining enterprises and residential quarters, high-rise buildings, etc.