Installing The Cs-1A Switch Operator; Connecting High-Voltage Conductors; Checking The Operation - S&C Mark V Circuit-Switchers Installation Manual

Installing the CS-1A Switch Operator

STEP 1� Mount the switch operator as indicated on the
erection drawing.
When more than one switch operator is avail-
able, be sure to select the one intended for the
circuit-switcher installation being made. Make
certain the circuit-switcher serial number,
located on the circuit-switcher nameplate on
the switch operator, matches the serial number
on the nameplate of each pole-unit.
If the erection drawing indicates universal
couplings in the vertical shaft, bolt one to the
switch-operator output shaft and one to the
shaft extending downward from the gearbox.
Alternately, if the erection drawing indicates
flexible couplings in the vertical shaft, bolt one
to the switch-operator output shaft and one to
the shaft extending downward from the gearbox.
Thread the flexible-coupling attachment bolts
through the flexible-coupling plate and through
the coupling flange. Tighten the bolts to draw
the flexible plate flush against the flange; this
will deform the threads in the flexible plate,
resulting in a binding, nonslip connection.
Install and tighten the self-locking nuts. Do
not use lockwashers with the flexible-coupling
attachment bolts.
STEP 2� At the gearbox end of the vertical shaft make
certain the cutting tips of the piercing set
screws do not protrude through the body of
the universal or flexible coupling. See Figures
19 through 21 on pages 23 and 24. Install
the vertical shaft. Tighten the clamp bolts
equally so the clamp pulls down evenly. Then
tighten the associated piercing set screws,
piercing the shaft, and continue turning until a
firm resistance is felt.
STEP 3� Then, couple the lower end of the vertical shaft
to the switch operator, but do not tighten the
clamp bolts or pierce the shaft at this time.
Fasten the free end of the grounding strap
STEP 4�
to the vertical shaft a few inches above the
universal or flexible coupling attached to the
switch operator, using the grounding connector
provided. Then, fasten the other end of the
grounding strap to a suitable earth ground.
STEP 5� Refer to S&C Switch Operator—Type CS-1A
Instruction Sheet 719-500, which is located inside
the door of the switch operator, and proceed as
outlined therein in the "Installation" section.
NOTICE
To avoid damage to the circuit-switcher and switch
operator, electrical operation of the switch operator
should not be attempted until its travel-limit discs have
been properly adjusted as described in S&C Instruction
Sheet 719-500�
STEP 6� Manually operate the switch operator to bring it
to the same position (fully Open or fully Closed)
as the circuit-switcher. Make certain the cutting
tips of the piercing set screws do not protrude
through the body of the universal or flexible
coupling attached to the output shaft of the
switch-operator. Tighten the clamp bolts equally
so the clamp pulls down evenly. Then, tighten
the associated piercing set screws, piercing
the shaft, and continue turning until a firm
resistance is felt.

Connecting High-Voltage Conductors

Connect the high-voltage conductors to their respective
circuit-switcher terminal pads.
WARNING
Before connecting the conductors to the Mark V
Circuit-Switcher, conductors must be de-energized
and grounded in accordance with standard system
operating practice� Then, proceed with the final checks
and adjustments described in the following steps�
Working on an energized circuit-switcher may lead
to equipment damage, personal injury, or death�

Checking the Operation

STEP 1� Using the manual operating handle on the
switch operator, open and close the circuit-
sw itcher to check the three -pole group
operation. The feeling of toggle action and the
increase in opening effort as the stored-energy
sources within the brains are charged will be
similar to that experienced with single-pole
operation.
Check interrupter action by observing the target
STEP 2�
on the side of each brain. During the opening
sequence, each target changes from gray to
yellow when the interrupter opens, then back
to gray, indicating the normally Closed position
of the interrupter. In addition, the interrupter
targets remain gray when the circuit-switcher
is closed, indicating that the interrupters are in
the Closed position.
S&C Instruction Sheet 711-510
Installation
25