SBF-1 Circuit Breaker Failure Relay Instruction Leaflet

This document is an instruction leaflet for the ABB Type SBF-1 solid-state circuit breaker failure detection relay, including addendum changes for wiring and schematic updates. It covers the relay's application, construction, and operation, detailing components such as the overcurrent detector, timers, and output relays, along with safety precautions for installation and maintenance.