ABB VD4 Addendum Manual page 18

18 V D 4 - 3 6 K V C R A D L E R E T R O F I T S O L U T I O N S E R V I C E I N S T R U C T I O N M A N U A L
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Periodic checking
Table 2.2
Checking operation
1 Carry out five mechanical
opening/closing operations
2 Visual inspection of the poles
(parts in resin)
3 Visual inspection of the
operating mechanism and
transmission
4 Visual inspection of the
isolating contacts
5 Measuring the insulation
resistance
6
Checking interlock operation
Time interval
1 year
1 year or 5000 operations
1 year or 5000 operations
5 years or 5000 operations
5 years or 5000 operations
5 years
Criteria
The circuit-breaker must operate normally without stopping in
intermediate positions.
The parts in resin must be free of any accumulation of dust,
dirt, cracks, discharges or traces of surface discharges.
The elements must be free of any deformation.
Screws, nuts, bolts, etc. must be tight.
The isolating contacts must be free of any deformation or
erosion.
Lubricate the contact elements with industrial Vaseline
grease.
See table 2 1. point 1
The interlocks provided must operate correctly