S&C AS-1A Instructions For Installation Manual page 13

I
ADJUSTMENTS - Continued
Opening-Stroke Travel-Limit Cam. With the selec-
tor handle in the coupled position, manually operate the
switch operator in the opening direction and observe the
opening-stroke travel-limit cam. At the completion of the
switch operator opening stroke, the leading edge of the
opening-stroke travel-limit cam should be engaged with
its roller. If the leading edge is not engaged with its roller,
acljust the opening-stroke travel-limit cam (as described in
Step 13) so that its leading edge touches ( or nearly
touches) the roller. Return the manual operating handle to
its storage position.
Intermediate Adjustment
of
Travel-Limit Cams
Step 15
The adjustments described in this step are required to
obtain a close approximation of the correct travel of the
switch operator in the decoupled position-i.e., in a no-
load condition, in order to avoid inadvertently overdriving
the Alduti-Rupter Switch when the switch operator is first
used for power opening or closing of the switch.
Closing-Stroke Travel-Limit Cam. With the selector
handle in the coupled position, manually crank the Alduti-
Rupter Switch to its fully
closed
position. Return the
manual operating handle to its storage position. Then
place the selector handle in the
decoupled
position and
replace the motor-circuit fuseholder.
Figure 7. Adjustment of cams on auxiliary switch.
S&C ELECTRIC COMPANY• Chicago
S&C ELECTRIC CANADA LTD.• Toronto
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Operate the switch operator electrically to open, and
then to close. If the position-indexing drums are not
numerically aligned, operate the switch operator electri-
cally to open. Remove the motor-circuit fuse holder. Then
acljust the closing-stroke travel-limit cam, as described in
Step 13, the necessary number of increments to attain
numerical alignment of the position-indexing drums at the
completion of a switch operator closing stroke.
Opening-Stroke Travel-Limit Cam. With the selec-
tor handle in the coupled position, manually crank the
Alduti-Rupter Switch to its fully open position. Return the
manual operating handle to its storage position. Then
place the selector handle in the
decoupled
position and
replace the motor-circuit fuseholder.
Operate the switch operator electrically to close, and
then to open. If the position-indexing drums are not
numerically aligned, operate the switch operator electri-
cally to close. Remove the motor-circuit fuseholder. Then
adjust the opening-stroke travel-limit cam, as described in
Step 13, the necessary number of increments to attain
numerical alignment of the position-indexing drums at the
completion of a switch operator opening stroke.
Contact (closed)
Roller
- - - - - - - - Cam (lowered toward
adjacent spring)
Adjacent spring
INSTRUCTION SHEET
769-500
Page 13 of 23
April 22, 1996