ABB 1SDA038290R1 Shunt Release — Remote Trip for SACE Breakers
The ABB 1SDA038290R1 is a shunt release (shunt open) designed to remotely trip a circuit breaker by applying a control voltage. It operates on 110 VDC or 120 VAC/DC, making it a standard drop-in accessory for ABB SACE power breakers where a remote trip signal is needed for emergency stop, undervoltage protection, or supervisory control.
The 110 VDC / 120 VAC/DC rating means this shunt release accepts either DC control circuits (common in industrial battery-backed trip systems) or AC control voltage at 120 V — typical for North American panel control transformers. It is not a universal coil; the voltage must match the trip circuit design. The 'SHUNT OPEN' designation indicates it trips the breaker when energized, as opposed to a shunt close which latches it. This is the standard fail-safe approach: loss of control power leaves the breaker untouched; a deliberate signal trips it.