MGC series SF6 gas fully insulated compact ring main unit (RMU) is a new type of SF6 gas insulated Medium Voltage Switchgear independently developed by Mercius company. The products adopt modular design and can be arranged arbitrarily according to different design schemes, the perfect combination of common box unit and extended unit is realized to meet the flexible use of compact switchgear in various secondary transmission and distribution substations. MGC series switchgear is a completely sealed system, all its primary components are enclosed in a stainless steel shell, not affected by the environment; It has reliable operation, safe protection, compact structure design, small footprint, maintenance-free, long life and so on. The products have passed the type test of the national high-voltage electrical appliance test center, and are widely used in small secondary power distribution stations, box-type switching stations, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, highways, subways, tunnels and areas with harsh natural conditions.