This is a shunt trip unit (SHT) used as part of the remote trip for EasyPact EZC100 circuit breakers. This SHT is powered by 24V DC voltage (Un). It is an auxiliary device used for emergency stop or remote opening applications. This auxiliary function switches off the circuit breaker when the control voltage Un rises above 70% of its nominal voltage Un. It complies with IEC 60947-2 standard. The control signals can be of pulse type > 20ms or maintained. This installation of the SHT is an internal installation. The EasyPact EZC device can be equipped with 1 SHT auxiliary device (2 poles) or with 2 SHT auxiliary devices (3/4 poles).