S&C Switch Operators
-
Type CS-1 A
I
ADJUSTMENTS
I
step
8
remove the two-pole pull-out fuseholders for the
motor, space-heater, and (if applicable) shunt-trip
circuits and do not reinsert them until so directed.
Manually operate the switch operator to bring it to
the same position
(fully
open or fully closed) as the
Circuit-Switcher. Tighten the flexible coupling clamp
bolts equally so that the clamp pulls down evenly. Then
tighten the associated piercing set screws, piercing the
shaft, and continue turning until a firm resistance is
felt. See Figure 3.
Step
9
With the selector handle in the coupled position, crank
the Circuit-Switcher to the fully open position and then
to the fully closed position, and in each position
accurately align the mechanical Circuit-Switcher
position indicators on the output-shaft collar of the
switch operator with the alignment arrow below. See
Figure 1.
At this time, the drive-shaft crank of each pole-unit
of the Circuit-Switcher should be checked to determine
that it is in an overtoggle position and against its open
or closed stop at the fully open or fully closed position
of the switch operator.
Position-indicating lamps
Figure 5. Views of switch operator
througtl
observation window.
7
1
Q1500
INSTRUCTION SHEET
Page 10 of 21
S&C
ELECTRlC
COMPANY
*
Chiu/jointfilesconvert/277756/bgn
September
7,1993
S&C ELECTRIC CANADA LTD.
l
Toronto
Avoid forcing the power tram beyond the
fully
open
or fully closed Circuit-Switcher stop positions.
Forced cranking against these stops can build up
sufficient spring energy in the vertical and
inter-
,$hase
shafts to cause the manual operating handle
to spin backwards should the grasp on the handle
be accidentally released.
step
10
The cranking direction to close the Circuit-Switcher is
indicated by an arrow plate located near the hub of
the manual operating handle. See Figure 5. This
direction has been predetermined from the erection
drawing for the specific installation and has been
factory-set accordingly. The direction of rotation of the
switch-operator motor has also been set at the factory.
Verify that these directions of rotation are correct
as follows:
(a) With the selector handle in the coupled position,
manually crank the Circuit-Switcher to the fully
open position and then to the fully closed position.
Temporarily mark on the top of the switch operator
enclosure the direction in which the output shaft
rotates to close the Circuit-Switcher.
(b) If the cranking direction required to close the
Circuit-Switcher is opposite to that indicated by the
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