With a SF6 switch as a master switch, this equipment is a new generation of metal-clad switchgear. The whole cabinet adopts air insulation and applies to power distribution automation. It is compact and extensible. With a simple structure, flexible operation, reliable interlocking and convenient installation, the product can provide satisfying technical solutions for different application occasions and different users’ requirements. The adoption of sensor technology and the latest protection relay, advanced technical performance and flexible assembly scheme can fully meet the changing demand of the market. The master switch can adopt a SF6 load switch. According to users’ needs, vacuum circuit breaker can also be equipped. There are two operating modes: manual and electric modes.