95
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