... operation The main technical index : JN4-12 Indoor Plateau Type Earthing Switch , plateau type earthing switch,indoor earthing switch ItemUnitData Rated voltage ... times 2000 Type standard:AC earthing switch for switchgear ,plateau type earthing switch Type standardABCJN4-12G/20-210750210628JN4-12G/20 ... -230792230668JN4-12G/20-250832250708Packing pictures: JN4-12 Indoor Plateau Type Earthing Switch