HXGN□-12 box-type fixed metal-enclosed switchgear (hereinafter referred to as ring network cabinet), rated voltage 12kv, rated frequency 50hz AC high-voltage complete set of equipment, mainly used for three-phase AC ring network, terminal distribution network and industrial electrical equipment , with the function of receiving, distributing electric energy and protecting. The ring main unit has strong completeness, small size, no fire and explosion hazards, and is also suitable for installation in box-type substations.