Masterpact M to Emax 2 Fixed Circuit-Breaker Retrofitting Guide

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.