The product absorbs foreign professional technology, its small size, only 50% of the volume of ordinary switchgear; The circuit breaker has high reliability and good performance. The "five prevention" interlock mechanism has the advantages of reliability and simplicity. The switchgear is an indoor complete set of 3.6, 7.2, 12kV three-phase AC 50Hz single bus segment, which is used for receiving and distributing electric energy. And has the circuit control, protection and monitoring functions, can be used in various types of power plants, substations and industrial and mining enterprises, high-rise buildings and other places, can also be combined with the ring network cabinet applied in the opening and closing.