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REF620 V2.0 ANSI Protective Relay Single Line Diagram

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This document is a typical single line diagram and wiring arrangement for an ABB REF620 V2.0 ANSI protective relay, detailing breaker control, trip logic, and bus selection for a dual-bus system. It includes front panel elevation, FT-1 switch arrangements, and connection points for current, voltage, binary I/O, and protective functions such as breaker failure, arc flash, and synchrocheck.

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