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Optional accessories for the circuit-breaker series NZM offers a comprehensive portfolio of application options for use world wide. The mounting is always flexible and easy thanks to the modular function groups. Notes: Shunt releases with push-in terminals. Switches are tripped by a voltage pulse or by the application of uninterrupted voltage. When the shunt release is live, contact with the circuit-breaker's main contacts on switching on is reliably prevented. Shunt release modules cannot be installed simultaneously with early-make contact NZM…-XHIV, untervoltage release NZM…-XU…, or relais modules NZM...-X2A...