Switch Handle Mechanism - Toshiba JK 400 Series Instruction Manual

Basic Installation and Operation Guide
Switch Handle Mechanism And Interlock
The handle mechanism which operates the isolation switch is adjusted at the factory and under normal
operation requires no further adjustment. Alignment can be checked, however, as follows (Fig. 48):
Hazardous Voltage. Turn off and lock out primary power.
Opening barriers will expose medium voltage.
1) Move the handle to the full OFF position.
2) Observe that the isolation switch blades are in contact with the ground pads.
3) 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. Attach yoke and pin to drive lever and tighten yoke lock nut.
4) Check the position of the handle interlock with the vacuum contactor in the OFF position. The tab
extending from the interlock should clear the notch in the handle, allowing the handle to be moved freely
between OFF and ON. Operate the contactor on test power and check that there is no binding and that the
contactor is able to reach its full travel in both directions.
The moving joints of all linkages should be occasionally lubricated with a light coat of Toshiba B9 grease.
TOSHIBA
Fig. 48 Switch Mechanism and Interlock Adjustment
JK 400 Series Fixed Controllers
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