Optional accessories for the NZM circuit breaker series offer an extensive portfolio of application options for worldwide use. Installation is flexible and easy thanks to modular function groups. Notes: For locking and load shedding circuits as well as for leading connection of the undervoltage release in main switch/EMERGENCY STOP applications. Not in conjunction with undervoltage release NZM..-XU.. or shunt release NZM..-XA.. Leading time when switching on and off (manual operation): approx. 20ms. Can be used for: NZM1(-4), PN1(-4), N(S)1(-4)