Installation - S&C Mark V Instructions For Field Assembly And Installation

S%C Circuit-Switchers
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Mark V
Grounding Switches
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70,000 Amperes Momentary
Outdoor Transmission
I
With 90-degree opening blades
perpendicular to bases when open
For Circuit-Switchers rated 230 kv
INSTALLATION
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Continued
I
to the fully closed position to check three-pole group
operation. In the event that it is necessary to adjust one
or two poles for more or less travel in the closing
direction to attain simultaneity, it can be accomplished
by loosening the clamp bolts which were tightened in
Step 6. Use the geared operating handle to move the
power train in the appropriate direction. Then retighten
the clamp bolts. Note that it is usually necessary, when
closing, that the grounding-switch blade farthest from
the outboard bearing assembly lead the grounding-
switch blades which are nearer, to compensate for lost
motion in the interphase linkage.
Do not attempt to change the open and closed stops
for
the grounding-switch assembly drive levers. These stops are
factory set to provide, for all three blade assemblies, equal
travel as well as the required positive-toggle condition when
closed.
When three-pole group operation is satisfactory,
torque to final tightness the clamp bolts on the flexible
couplings at the grounding-switch assemblies. Then
tighten the piercing set screws, piercing the pipe, and
continue turning until a firm resistance is felt.
Step 9
Check the cranking-direction label located on the front
of the manual geared operating handle. If the "To
Open" and "To Close" cranking directions indicated
are incorrect, remove the screws holding the cranking-
direction label-an alternate-reading label is attached
behind it and should be used instead. See Figure 3 .
Step 10
If a key interlock is not specified, omit Step 10.
The key interlock group includes a Superior Key
Interlock, Type B-4003-1, with stainless-steel locking
bolt, zero bolt projection, and %-inch bolt travel; a
hinged dust cover; an interlock adapter; and an interlock
collar which is bolted to the output shaft of the manual
geared operating handle. The interlock collar is
provided with a slot to accept the key interlock bolt.
If "provision only" for a key interlock is specified, the
interlock will not be included. Proceed as follows:
(a) Using the manual geared operating handle, crank
(b) Remove the bolts which fasten the interlock collar
the grounding switch to its fully open position.
to the output shaft.
(c) Rotate the interlock collar to the position where the
key interlock bolt, when extended, will be centered
in the slot in the collar. Then replace and tighten
the bolts to fasten the interlock collar in that
position. Note that these same bolts are also used
for the "Open" and "Closed" position indicators,
which are to be set as described in Step 11.
Step 11
Using the manual geared operating handle, crank the
grounding switch to its fully open position and set the
"Open" position indicator on the output shaft of the
manual geared operating handle so that this indicator
is visible from the front of the handle. Then fully close
the grounding switch and set the "Closed" position
indicator on the output shaft of the manual geared
operating handle so that this indicator is visible from
the front of the handle.
7 1 1 m630
INSTRUCTION SHEET
Page 4 of 9
S&C ELECTRIC COMPANY
0
Chicago
July 14, 1986
S&C ELECTRIC CANADA LTD: Rexdale