HXGN–12 vacuum ring main unit is an indoor ring–net power supply unit and end distributing equipment of AC.3–phase,12KV,50Hz distributing system, mainly used in enterprises,industries,high–buildings,schools and residence areas.The cubicle has capability of breaking or making rated load current and idle current of power transformer. as well as a certain distance overhead circuits, cable circuits or current of capacitor banks.Load switch–fuse combined switchgear can break rated short circuit current disposable,as protecting, distributing and controlling equipment in power supply system.