L&T Electrical & Automation GIS GV3N, Руководство по эксплуатации и техническому обслуживанию

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MAINTENANCE
Operation & Maintenance Manual 07
Type GV vacuum circuit breakers require little maintenance
during their normal working life. The pole assembly including
the interrupter is considered maintenance free for the working
life of the interrupter, the mechanism require regular inspection
and little maintenance.
4.0 MAINTENANCE
4.1 - Inspection and Servicing Criteria.
The inspection intervals should be reduced for equipment used
in an adverse environment.
Arbitrary time
Table 4.1: Inspection Intervals
4.1.1. Visual inspection:
4.1.3. Detailed inspection
and major service:
Performed every 10,000 operations or 100 Operations at rated short circuit breaking Current
and rated voltage or when the wipe / snatch gap has reduced to 1mm.
Performed every 3 years or 2000 operations 4.1.2. Ordinary inspection:
Operation
Mechanism
Inspection
Visual Ordinary Detailed
Visual check
Category Check point
Operation
Greasing
Loose bolts and nuts
Dust and foreign matters
Dislocated parts
Filling and chips
Indication of indicator and Counter
Deformation, damage, wear
Resetting operation of trip prop and
closing prop
Movement of rollers and pins
Warping or galling of parts
Check on reset condition
Remove old grease and apply new grease
Check for dislocated connectors and pins
and for deformation and break
Check for loose fastenings of The switch
terminals and for rust
Visual check
Operation of auxiliary switches
Contact state of limit switches
Electrical open-close operation
Check on
mechanical
parts
Control
Circuit
Check on wipe dimension (Must be larger than 1mm)
Number of open-close operations (Replace the interrupter
when 10,000 operations are exceeded)
Abnormal noise
Abnormal smell
Whole circuit
breaker
Vacuum
Interrupter
Others
4.2 - Contents of Inspection
Check points for visual, ordinary and detailed inspections are listed in table 4.2.
Table 4.2: Check points for maintenance and inspection