... combination of explosion-proof electromagnetic starter.Main technical parameter:Rated operation voltage: AC50Hz, 380V, 660V, 1140VRated operation current: 250A, 400A, 600A(600V time ... line:250A, 400A, 600ARated voltage of control electric circuit:AC50Hz, 36V, 127V, 220V, 380V.Auxiliary contacts: 3NO, 3NC.Rated operation frequency:(1) AC3 300T ...