MAINTENANCE
Page 45
Open and close the switch and verify
that no excessive force is required.
Observe that the line terminal shutter
opens and closes properly. Lubricate
the moving parts of the handle
mechanism and, if necessary, apply a
light coat of Toshiba B8 grease to the
inside contact surfaces of the switch
blades.
Grease is conductive.
Do not allow grease to
contact the switch
housing or the insulated
shutter.
Examine the current-carrying switch
blades for any sign of discoloration due
to overheating.
Each bolted pressure switch blade assembly is
pre-torqued and adjusted to the proper settings
at the factory. Do not attempt to change the
torque settings or replace individual parts of
this assembly in the field. Should it ever
become necessary to replace the blade
assemblies, contact the nearest Toshiba
representative.
SWITCH HANDLE MECHANISM
The handle mechanism which operates the
isolation switch is adjusted at the factory and
under normal operation requires no further
adjustment. Adjustment can be checked,
however, as follows (Fig. 58):
Move handle to full OFF position.
Observe that isolation switch blades are
in contact with the ground pads.
If adjustment is required, loosen lock
nut securing yoke on handle end of
connecting rod.
Remove pin which
attaches yoke to handle drive lever.
Turn yoke in required direction to
achieve adjustment defined in step 2.
Re-attach yoke and pin to drive lever
and tighten yoke lock nut.
E
E
H
Fig. 58
Switch Mechanism Adjustment
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