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HXGN-12箱型固定式金属封闭开关柜（简称环网柜）适用于交流50Hz，12KV的网络作为开断负荷和短路及关合短路电流用。本环网柜配用手动、电动弹簧机构来操作负荷开关，接地开关和隔离开关配用手动操作机构。

HXGN-12 tank fixed type metal enclosed switchgear(ring main unit)is used for A.C 50Hz,10kV network as broken loading, short-circuit and closing short-circuit. The ring main unit equiped with manual/electromagnet spring charged operated mechanism to operate loading switch, earthing switch and isolating switch equiped with manual operated mechanism.