Circuit Breaker Accessories Shunt Trip Circuit BreakersS2, S3 Shunt Tripper Model typeS2, S3 Shunt tripperRated insulating voltage(Ui)500VRated power voltage(Us)AC 400, 230, 125VOver-voltage range70~100% UsContact capacityAC  3A/400V,  6A/260V,  9A/125VDielectric strength2kV/minRated voltage AC(V)125, 300, 400Shunt Trip Circuit BreakersAC  3A/400V,  6A/260V,  9A/125VS2, S3 Shunt TripperShunt Trip Circuit BreakersAC  3A/400V,  6A/260V,  9A/125VS2, S3 Shunt TripperMounting on the right side of MCB/RCBO, used to trip the combined MCB/RCBO by remote controlling device. SD3 Alarm Switch Model typeSDRated insulating voltage(Ui)500VOver-voltage range70~100% UsRated power voltage(Us)AC 400, 230, 125VContact capacityAC  3A/400V,  6A/260V,  9A/125VDielectric strength2kV/minRated voltage AC(V)125, 300, 400Used to connect ON/OFF auxiliary contact, work as circuit breaker ON/OFF indicator in case of faulty (tripping) U2+O2, U3+O3 Over or Under Voltage Tripper Model typeMNRated voltage (Ue)AC 230VRated insulating voltage (Ui)500VOver-voltage tripping range280VUnder-voltage tripping range170VMounted on the right side of circuit breaker, actuate the combined device to trip in case of under-voltage or over-voltage, effectively prevent the device from closing operation under abnormal power voltage condition.