TeSys GV electrical trip, MN undervoltage release, 120-127V AC 50Hz, for motor circuit breakers GV2, GV3.It trips the circuit breaker when the control voltage drops below 0.35 Uc, possible opening between 0.35-0.7 Uc.Closing of the circuit breaker is only possible when the control voltage is applied in the range 0.85-1.1 Uc.To be mounted on right-hand side of the circuit breaker, connection by screw clamp terminals.Multi standards certified (IEC, UL, CSA, CCC, EAC), Green Premium compliant (RoHS/REACh).