The cabinet gas insulated metal enclosed switchgear is the product formed when gas insulated switchgear (GIS) expands to medium-voltage field. Circuit breakers, isolating switches, grounding switches and other high-voltage components are installed in a sealed metal cabinet, which is filled with low pressure insulating gas medium and takes cable terminals as inlet-outlet lines. GIS is one of the main development directions of high-voltage electrical equipments. Suitable for the transmission and distribution system, this equipment is used for receiving or distributing electric energy, controlling, protecting and monitoring normal operation and fault of power system. It is also suitable for construction and transformation of urban and rural power grid, urban subways, light railways, high-rise buildings, plateau substations and other construction projects.