S&C AS-1A Instructions For Installation Manual page 14

S&C Switch Operators - Type AS-1 A
I
ADJUSTMENTS - Continued
Final Adjustment of Travel-Limit Cams
Step 16
The adjustments described in this step are necessary to
ensure complete opening and closing of the Alduti.-Rupter
Switch. Therefore, attention must now be directed to the
open and closed stops of the switch.
Operate the switch operator electrically to open and
close the Alduti-Rupter Switch. Observe the toggle mecha-
nisms (if applicable) and the open stops on the switch. It
is likely that full opening and closing travel will not have
been attained. This is because the travel-limit cams were
adjusted to limit the extent of output-shaft rotation while
the switch operator was in the decoupled position-i.e., in
a no-load condition. To attain full stop positions (and
over-toggle positions, where applicable) of the Alduti.-
Rupter Switch, refer to Figure 6 and proceed as described
below.
Closing-Stroke 'lravel-Limit Cam. If full closing of
the Alduti-Rupter Switch was not attained, replace the
motor-circuit fuseholder and operate the switch operator
electrically to open the Alduti-Rupter Switch. Remove the
motor-circuit fuseholder.
To increase travel in the closing direction, retard the
closing-stroke travel-limit cam one 4.5-degree increment
(1) in the clockwise direction if the travel-limit cam and
output shaft rotate clockwise to open the Alduti-Rupter
Switch; or (2) in the counterclockwise direction
if
the
travel-limit cam and output shaft rotate counterclockwise
to open the Alduti-Rupter Switch. Replace the motor-cir-
cuit fuseholder and operate the switch operator electri-
cally to close. If full closing travel has not been attained,
repeat the procedure described above until full closing
travel is attained.
Opening-Stroke 'Iravel-Limit Cam. If full opening of
the Alduti-Rupter Switch was not attained, operate the
switch operator electrically to close the switch. Remove
the motor-circuit fuseholder.
769•500
INSTRUCTION SHEET
Page 14 of 23
April 22, 1996
I
To increase travel in the opening direction, retard the
opening-stroke travel-limit cam one 4.5-degree increment
(1) in the counterclockwise direction
if
the travel-limit
cam and output shaft rotate clockwise to open the Alduti-
Rupter Switch; or (2) in the clockwise direction if the
travel-limit cam and output shaft rotate counterclockwise
to open the Alduti-Rupter Switch. Replace the motor-cir-
cuit fuseholder and operate the switch operator electri-
cally to open. If full opening travel has not been attained,
repeat the procedure described above until full opening
travel is attained.
Step 17
When travel-limit cam adjustments have been completed,
it may be necessary to realign the Alduti-Rupter Switch
position indicators on the switch operator output-shaft
collar with the alignment arrow.
With the switch operator in the fully open position and
then in the fully closed position, check the corresponding
switch operator position indicator. In each position, the
corresponding position indicator should be readily visible
from the front of the enclosure.
If
adjustment of either
position indicator is necessary, remove the motor-circuit
fuseholder, loosen the two set screws on the position indi-
cator, and rotate the position indicator to the desired posi-
tion. Retighten the set screws. See Figure 8.
Step 18
The auxiliary switch, which is permanently coupled to the
motor, includes eight contacts (terminals 11 through 26).
If the optional position-indicating lamps are included, six
contacts are available (terminals 13 through 18 and 21
through 26). These contacts are provided so that external
circuits can be established to monitor switching opera-
tions. Each contact is operated by a cam-actuated roller.
The cams are individually adjustable in 4.5-degree incre-
ments. Adjustment of the cams is accomplished in a
manner identical to that indicated in Step 13 for the travel-
limit cams.
S&C ELECTRIC COMPANY• Chicago
Ill
S&C ELECTRIC CANADA LTD.• Toronto