Optional accessories for the NZM circuit breaker series offer an extensive portfolio of application options for worldwide use. Installation is flexible and simple thanks to modular function groups. Notes: For leading connection of the undervoltage release in main switch applications as well as for locking and load shedding circuits. Can be used for EMERGENCY STOP devices in conjunction with EMERGENCY STOP buttons. If the shunt release is live, touching the main switch contacts is safely prevented when attempting to switch it on. Lead of the auxiliary contacts when switching on and off (manual operation): approx. 20ms. Undervoltage release cannot be installed at the same time as leading auxiliary switch NZM..-XHIV.. or shunt release NZM..-XA.. Can be used for: NZM1(-4), N(S)1(-4)