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Masterpact M to Emax 2 Fixed Circuit-Breaker Retrofitting Guide

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This document provides instructions for replacing obsolete Masterpact M fixed version air circuit-breakers (800A to 6300A) with more modern Emax 2 fixed version circuit-breakers of the same size, without modifying the switchgear's live parts. It includes safety procedures, compatibility verification, and conditions for maintaining electrical characteristics such as rated current and breaking capacity.

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