... with multi-loop vacuum electromagnetic quick plug-in type combination starter ,QJZ1-2000/1140(660)-9( ... 11,12) is suitable to the coal mine well with mixed gas containing methane. In the ... status, loop on-line status,insulation status, fault type and others;With functions of fault check, fault ... ,10,11,12StructureContactor: the control box is type of drawerRated Voltage(V)1140,660 Control modesSingle ...