Siemens WLETU776 Electronic Trip Unit WL Series

Siemens WLETU776 WL Series Electronic Trip Unit is the protection module for WL low-voltage circuit breakers installed in metal-enclosed WL switchgear. It provides long-time (L), short-time (S), and instantaneous (I) overcurrent protection, with optional neutral (N) protection; a ground-fault protection module (GFM A 776) can be added for alarm-only or protective functionality, and Metering Plus delivers local energy readouts. Rated for 200 to 5000 A across WL frames WLS, WLH, WLL, and WLC and up to 600 V, the ETU776 is designed for main and tie-position protection in industrial power distribution. The unit includes an integrated LCD display for trip data and status and supports CubicleBus communications with Modbus or Profibus interfaces for integration with broader protection schemes.