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PART B Installation, Operation & Maintenance
Part
subjected to
Earthing
connection
Auxiliary
circuit supply
voltage
Operating and
control
elements
Abnormalities noticed
Trace of the oxidation and /
or loose nuts
Check the supply voltage of
the operating mechanism
electrical accessories
Carry out the functional tests
Remedies
Clean with a rough cloth
soaked in a suitable solvent.
Tighten the earthing
connection fully and cover it
with neutral grease
The close/ opening coils
must operate correctly for
values between 85% and
110% of the relative rated
voltage
Replace the damaged or
faulty elements (if
necessary as ABB)
32
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