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 the NZM..-XR.. remote operator. If the shunt release is live, touching the main switch contacts is safely prevented when attempting to switch on. Leading auxiliary contact when switching on (manual operation): approx. 90ms. The shunt release cannot be installed at the same time as the leading auxiliary switch NZM..-XHIV.. or the undervoltage release NZM..-XU.. Can be used for: NZM4(-4), N(S)4(-4)