GIS is a metal-enclosed switch cabinet, also known as inflatable cabinet, which uses gas in whole or in part but does not use air under atmospheric pressure as the insulating medium.GIS is a high-voltage switch cabinet composed of circuit breaker, bus, isolation switch, voltage transformer, current transformer, lightning arrester and bushing. It is called fully insulated and fully enclosed metal switch equipment.

GIS aeration tank use insulation arcing performance of SF6 gas as insulation and arcing medium, and all the high voltage electrical components in a grounded metal cylinder seal, compared with the traditional open type high voltage switchgear, GIS high-voltage switch cabinet cover an area of an area small, all components and sealing without environmental interference, high reliability and convenient operation and maintenance cycle is long, small maintenance workload, rapid installation, low operation cost, no electromagnetic interference, etc.