This tripping coil is used for the instantaneous remote tripping of the MasterPact MTZ circuit breaker. Tripping occurs instantaneously as soon as the supply voltage drops to a value of 0.7x the nominal voltage. Instantaneous undervoltage release MN diag 380/480V AC MTZ2/3 plug-in unit. This tripping coil contains a communication-capable diagnostic function. This tripping coil can only be ordered in conjunction with a configured circuit breaker.