ABB YO-1SDA038291R1 is a shunt opening release (shunt trip) accessory designed for ABB low-voltage power circuit breakers.It enables remote electrical tripping of the circuit breaker when a control voltage is applied to the shunt coil. This function is typically used for emergency shutdown, safety systems, and remote control applications. When energized, the shunt release mechanically opens the circuit breaker, disconnecting the circuit.
