TeSys GV electrical trip unit, MN undervoltage release, 440-480V AC 60Hz, for motor circuit breakers GV4. Opening of the the circuit breaker is ensured when the control voltage drops below 0.35 Uc, and possible between 0.35-0.7 Uc. Closing of the circuit breaker is possible when the control voltage is in limits 0.85-1.1 Uc. To be plugged inside the circuit breaker, connection by spring terminals. Multi standards certified (IEC, UL, CSA), Green Premium compliant (RoHS/REACh).