3WL1112-2CB42-1AA2 SIEMENS

The 3WL1112-2CB42-1AA2 is a robust and reliable fixed-mounted circuit breaker from Siemens, designed for comprehensive circuit protection in industrial and commercial applications. This 4-pole circuit breaker, conforming to IEC standards, is rated for an In=1250A current up to 690V AC at 50/60Hz. It boasts a size I frame and a rear connection for horizontal mounting, optimizing space and installation flexibility. The circuit breaker features an ETU 25 overcurrent release, providing adjustable LSI (Long-time, Short-time, Instantaneous) protection with settings ranging from 0.4 to 1 times the rated current (In). This allows for precise tailoring of protection characteristics to specific load requirements. Equipped with a manual operating mechanism and energy storage, the breaker ensures dependable operation even in the event of power loss. A mechanical request feature is included for enhanced control and monitoring. Auxiliary releases are not included in this model, simplifying the design and reducing potential points of failure. The breaker incorporates 2NO (Normally Open) and 2NC (Normally Closed) auxiliary contacts for signaling and control purposes. With an Icu=55kA at 500V, it provides reliable short-circuit protection, safeguarding equipment and personnel.