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ABB REF 54_, REM 54_, RET 54_, REC 523 Safety Instructions

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This document provides multilingual safety instructions and manual ordering information for ABB’s REF 54_, REM 54_, RET 54_, and REC 523 protection relay terminals. It covers compliance with EMC and Low Voltage directives, electrostatic discharge precautions, earthing requirements, and authorized installation procedures.

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