Optional accessories for the NZM circuit breaker series offer a comprehensive portfolio of application possibilities for global use. The installation is flexible and straightforward due to modular functional groups. Notes: Immediate disconnection of the NZM circuit breaker or load disconnect switch N occurs when the control voltage drops below 35-70% of US. Usable for emergency stop devices in conjunction with emergency stop buttons. When the undervoltage release is de-energized, touching the main contacts of the switch during attempts to switch on is safely prevented. The undervoltage release cannot be installed simultaneously with the leading auxiliary switch NZM..-XHIV.. or the working current release NZM..-XA... Usable for: NZM4(-4), N(S)4(-4).