REF620 V2.0 ANSI Protective Relay Functional Application Drawings

This document is a set of engineering drawings for the ABB REF620 V2.0 ANSI protective relay, detailing its functional application in a distribution feeder with dual-bus and dual-breaker configurations. It includes a single-line diagram, front panel elevation, and FT-1 switch arrangement, specifying binary I/O connections, trip signals, and parameter settings for protection functions such as breaker failure, overcurrent, and voltage monitoring.