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: Cannot be used in conjunction with remote operator NZM..-XR.. If the shunt release is live, touching the main switch contacts is safely prevented when attempting to switch it on. Leading auxiliary contact when switching on and off (manual operation): approx. 20ms. Shunt release cannot be installed at the same time as leading auxiliary switch NZM..-XHIV.. or undervoltage release NZM..-XU.. Can be used for: NZM1(-4), N(S)1(-4)