S&C Omni-Rupter, Руководство по установке

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14 S&C Instruction Sheet 765-500
Step 14
Ç
CAUTION
Adjust the stop plates to remove all excess
play from the operating mechanism and to
attain proper “windup” tension before ener-
gizing the switch.
Slack in the operating pipe may allow
the switch to creep out of the fully-closed
position.
Failure to properly adjust the handle
may cause contact overheating or arcing,
damaging the blade contacts. Injury to
operating personnel may result.
Loosen the bolts which secure the adjustable
stop plates to the foot bearing support plate.
See Figure 9. Place the switch in the fully-open
position and adjust the open-position stop plate
so that the handle, when lowered, fits into the
open-position slot. Mark, on the support plate,
the location of the open-position stop plate.
Fully close the switch and apply sufficient
pressure to the handle in the closing direction
to remove all play in the operating-pipe linkage.
Now adjust the closed-position stop plate so that
the handle will require even greater pressure to
force it into the closed-position slot. Mark, on
the support plate, the location of the closed-
position stop plate.
While holding both stop plates in the previ-
ously marked positions, torque the bolts to
secure the stop plates to the support plate.
Move the handle to the switch-open position
and verify that the handle, when lowered, fits
firmly into the open-position slot.
Then move the handle to the switch-closed
position. Verify that all play in the operating-pipe
linkage has been taken up before the handle can
be lowered into the closed-position slot and,
further, that substantial pressure is required
to force the handle into the closed-position
slot. Attainment of this “windup” tension in the
operating linkage is essential to ensure positive
switch closure.
Step 15
Recheck to be sure that all clamp bolts and
piercing set screws have been torqued to final
tightness.
Installation
Figure 9. Foot bearing assembly and operating-handle assembly.
Foot bearing support plate
Adjustable stop plates