This equipment is three phase, alternating current, 50Hz, SF6 full gas insulated and sealed metal-enclosed switchgear which adopts modular design and uses master switches, like vacuum breaker, load switch, load switch fuse combinations and disconnector, etc. as the functional units, which are installed in the sealed gas tank, forming each inflatable compartment unit; its busway can be extended in both right and left directions through busway connector, and the inlet and outlet line adopt plug-in type cable; it will not be impacted by the environment, with high reliability and high safety performance, free of maintenance; it is widely used in industry and civil ring network distribution system and at the terminal of power supply, especially applicable to the small secondary distribution station, switching station of industrial and mining enterprises, urban residential district, airport and railway, etc..