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Chapter 5
CONTENTS
Maintenance inspections
5-1 Faults and causes ................................................................................................96
5-2 Periodic inspections
5-2-1 Initial inspection ............................................................................................................98
5-2-2 Periodic inspections .....................................................................................................98
5-2-3 Inspection following overcurrent tripping ......................................................................99
5-3 Replacement recommendations
5-3-1 Recommendations for MCCB deterioration diagnosis and replacement ....................100
5-3-2 Recommended replacement guidelines based on switching durability ......................100
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