The switch cabinet is an electrical equipment. The external line of the switch cabinet enters the main control switch in the cabinet first, and then enters the sub control switch. Each sub circuit is set according to its needs. For example, instruments, automatic control, motor magnetic switches, various AC contactors, etc., some are also equipped with high-voltage room and low-voltage room switch cabinets, high-voltage buses, such as power plants, etc., and some are also equipped with low cycle load shedding for main equipment.
Switchgear is mainly used to switch, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. The components in the switch cabinet are mainly composed of circuit breaker, disconnector, load switch, operating mechanism, mutual inductor and various protective devices. There are many classification methods for switchgear. For example, through the installation of circuit breaker, it can be divided into movable switchgear and fixed switchgear; Or according to different cabinet structures, it can be divided into open switchgear, metal enclosed switchgear and metal enclosed armored switchgear; According to different voltage levels, it 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, petrochemical industry, metallurgical steel rolling, light industry and textiles, factories and mining enterprises, residential quarters, high-rise buildings, etc.
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