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: Tripping of the switches occurs with voltage pulses or when a continuous voltage is applied. If the working current release is live, touching the main contacts of the switch during attempts to switch on is safely prevented. The working current release cannot be installed simultaneously with the leading auxiliary switch NZM-XHIV or the undervoltage release NZM-XU. Usable for: NZM1(-4), N(S)1(-4).