... Intrinsically safe with multi-loop vacuum electromagnetic quick plug-in type combination starter ,QJZ1-2000/1140(660)-9(10 ... losing, current leakage interlock, over voltage absorption, triphase imbalance;Real-time display triphase current, system voltage, operation status, loop on- ... others;With functions of fault check, fault memory;Configured in the RS485 system of mining power automatic control and ...