25
1ZSE 5492-128 en, Rev. 4
fm_00109
3 Repairs and adjustments
2.
Change the upper end stop in the following way:
-
Operate to the new highest position –1.
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Mark up the first hole above the pivoting arm (Fig. 10).
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Operate the on-load tap-changer to a position where the marked hole is accessible
and mount another extra stop screw.
3. Operate the motor-drive mechanism using the hand crank and check that the mechani-
cal end stops work and with motor operation that the electrical limit switches work in
both lower position (Fig. 11) and upper position (Fig. 12).
Upper end stop
Stop screw
Pivoting arm
Lower end stop
Stop screw
Upper end stop
Stop screw
Pivoting arm
Lower end stop
Stop screw
Fig. 12.
Fig. 10.
Pivoting arm
Stop screw
Lower end stop
Stop screw
Upper end stop
Fig. 11.
