This is a shunt trip(SHT) as the part of remote tripping is used for EasyPact EZC250 circuit breakers. This UVR is worked at 100~120VAC voltage(Un),50/60Hz. This release trips the circuit breaker when control voltage rises above 0.7Un. The control signals can be of the impulse type(>=20ms) or maintained. This installation of SHT is internal mounting.