This switch cabinet is suitable for AC 50Hz/60Hz, rated working voltage 380V/400V, 660V, rated current under 5000A and three-phase four-wire and three-phase five-wire power system, which are widely used in  power plants, substations, industrial and mining enterprises, buildings, hotels, airports, wharfs and radio television communication centers. Besides, it can be the PC and MCC (motor control center) in power distribution for power generation, transmission and distribution, and conversion and compensation of electric energy.