ABB 290B311A25 Relays

ABB 290B311A25 TR-1 Auxiliary Tripping and Indicating Relay is a legacy ABB/Westinghouse protection accessory designed to provide an auxiliary trip signal and a clear indication of trip status within protection circuits. The catalog number 290B311A25 identifies this specific TR-1 variant, part of the TR-1 family that has traditionally completed the interface between protective relays and trip/control hardware in protection assemblies. In operation, the unit accepts a control or trip signal from a protective relay and closes its output to trip a circuit-breaker, while also driving an indicator or status contact to alert operators of the fault condition. This combination of actuation and indication makes the TR-1 relay suitable for protection schemes in power distribution equipment where reliable trip confirmation and visible status are essential. As a TR-1 style accessory, the 290B311A25 is used in established ABB protection architectures and is referenced in distributor catalogs and legacy system inventories as a replacement or service part for maintaining uninterrupted protection schemes. The result is a compact, compatible module that interworks with older relay strings and control circuits, ensuring coordinated protection across protection relays and breaker control equipment.