... & current over 0 cutoff 2)thyristor over 0 switching 3)contactor switch hasn't consumption Technology parameter1,Environmental requirementAmbient temprature : -45°C ... -resistance:≤0.003ΩRun indication1.working light:after closing the switch , the lights , after swtich off , the lights go out.2 ... , after repaired , the lightsgo out. NFC-401 Mechatronics Integration Complex Switch