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PART B Installation, Operation & Maintenance
4.2.3 High voltage connection
The high voltage connection fasteners shall be preferable
of M12 size stainlessteel bolts/galvanized bolt and nut
and at least one washer and 1 spring washer.
Terminal connectors should be properly cleaned using SS
wire brush to remove the aluminum oxide film and
conducting grease to be applied.
The conductor terminals shall be connected in such a
fashion that clearances are maintained properly.
4.2.4 Low voltage connections
The Auxiliary circuit connections shall be checked as per
relevant schematic diagram for correctness (See Fig. 3,
page no.51 for typical schematics). A removable
gland plate is provided in the bottom of the
control cabinet (Fig.3 pg.51), which can be
suitably drilled as per control cable glands.
4.2.5 Earthing
Earthing connection should be made as shown
in GA drawing (Fig. 3, pg. 51). All earthing
joints should be securely bolted together.
Connections to the station earthing should have
a cross section, not less then that of the earth
connection pad welded on the structure.
Charge the closing spring & operate the breaker
3 to 4 times.
Check the ‘breaker open’ position setting once
again, if it has changed, reset again.
Tighten the nuts on
drive link
and lock with
‘loctite’.
Carry out other pre-commissioning checks as per
instruction manual.
Fix cover on the pipe using M8 hardware.
Composite
Lever
Adjust the drive link length in such a way that special
pin, supplied loose, passes through the setting hole in
the bracket and the composite lever as shown above
Once the punch mark on the composite lever is
matched with the setting hole provided on the bracket,
this decides the OPEN position of the breaker. This
adjustment is to be done carefully.
Tighten the nuts and the check nut on the
drive link
.
Remove the setting pin from the composite lever.
This Bracket is fixed in the
duct
Pin
