DBF Digital Breaker Failure - Legacy
Manufacturing for this product has been discontinued. As an alternative, please refer to the 8 Series and UR Family relays.
The DBF is a digital breaker failure relay that provides phase and ground backup protection if the primary circuit breaker fails to clear a system fault.
Two step instantaneous and/or time delayed breaker failurePhase instantaneous overcurrentGround instantaneous overcurrentThree phase direct trip Internal arcing protectionOperation failure detectionThree settings groups14 configurable inputs
Current meteringBreaker health monitoringEvent recorder, last 165 events