S&C CS-1A Manual

16 S&C Instruction Sheet 719-501
Inspection and MaintenanceInspection and Maintenance
Elective Exercising
To ensure continued proper performance of the Type
CS-1ASwitch Operator and the associated circuit-
switcher, they should be inspected in accordance with
S&C’s recommended schedule and procedures contained
in S&C Instruction Sheet 711-590.
Electively doing a complete circuit-switcher installa-
tion, including the shunt-trip device, when this option is
furnished, may be accomplished without the need to open
the high-voltage circuit by equipping the circuit-switcher
with the optional stick-operated bypass accessory (catalog
number suffix “-B1” or “-B2”).
Even without the bypass accessory, the Type CS-1A
Switch Operator may be decoupled from the circuit-
switcher, thereby permitting elective exercising of the
operator at any time without requiring an outage or switch-
ing to an alternate source. When the switch operator is
in the Decoupled position, the shunt-trip device, when
furnished, is rendered inoperative, thereby enabling the
system protective scheme to be disabled.
Brake Inspection
As indicated in S&C Instruction Sheet 711-590, “S&C Mark V
Circuit-Switcher: Inspection Recommendations,” the brake
in the Type CS-1A Switch Operator should be inspected
every 2,500 operations or ve years, whichever occurs
more often. The inspection procedure is as follows. See
Figure 8 on page 17.
STEP 1� Place the selector handle in the Decoupled
position.
STEP 2� Remove the two-pole pull-out fuseholders for the
motor, space-heater, and (if applicable) shunt-
trip circuits.
STEP 3� Disconnect the linkage rod by removing the
¼–20 x 1¼-inch hex-head screw, lockwasher, at
washer, and spacer-bushing from the end of the
brake lever, as shown in Detail A in Figure 8 on
page 17. Be careful not to lose these parts. Then,
raise the brake lever and measure the vertical
free play, as shown in Detail B in Figure 8 on
page 17. This dimension should be ⅝-inch (16 mm)
to ¾-inch (19 mm). Should the measurement be
outside this range, brake-wear compensation is
required; proceed to Step 4. If the measurement
is within this range, reattach the linkage rod
and tighten the ¼–20 x 1¼-inch hex-head screw
securely, and proceed to Step 9.
STEP 4� Remove the four –18 x 1¼-inch screws used to
attach the motor, withdraw the motor, and care-
fully rest its shaft on the oor of the enclosure.
Be careful not to lose the square key or tubular
spacer (if furnished), which may remain on the
motor shaft.
Note: 115-Vac and 230-Vac motors use a
¼–20 socket head-set screw on the side of the
brake disc hub, as shown in Detail C in Figure 8
on page 17. Loosen this set screw approximately
one-half turn using a ⅛-inch Allen wrench before
removing the motor.
STEP 5� Using a  -inch Allen wrench, loosen the pad
assembly socket head-set screw on the side of
the caliper assembly approximately one-half
turn. See Detail A in Figure 8 on page 17.
STEP 6� Using a -inch Allen wrench, rotate the pad
assembly clockwise until the free play at the end
of the brake lever is ⅝-inch (16 mm) to ¾-inch
(19 mm), as shown in Detail B in Figure 8 on
page 17. Now, tighten the -inch pad assembly
socket-head set screw.
STEP 7� Insert the spacer-bushing through the angle
bracket and brake lever, and reattach the linkage
rod using the ¼–20 x 1¼-inch hex-head screw,
lockwasher, and at washer. Tighten the screw
securely.
STEP 8� Insert the square key in the keyway, as shown in
Detail A in Figure 8 on page 17. Slip the tubular
spacer (if furnished) over the motor shaft and
reinstall the motor. Position the motor so the
two weep holes on the side of the housing face
downward.
STEP 9� Replace the four  –18 x 1¼-inch screws used
to attach the motor and tighten them securely.
On 115-Vac and 230-Vac motors, retighten the
¼–20 socket-head set screw on the side of the
brake disc hub.

S&C CS-1A Specifications

General

Brand	S&C
Model	CS-1A
Category	Switch
Language	English