S&C Circuit-Switchers
-
Mark V
I
Integer Style
Outdoor Transmission 34.5 kv through 69 kv
SHUNT-TRIP DEVICE
If the optional shunt-trip device has been
specified, the control wiring for the shunt-trip
solenoids should be connected to the terminal
block in the switch operator at this time. See S&C
Instruction Sheet 71 l-600.
Step 8
Because this Circuit-Switcher was carefully adjusted
at the factory, the only field adjustments that should
be required are those described in S&C Instruction
Sheet
719-500.
There are, however, several checks that
should be made to ascertain that no adjustments were
disturbed during shipment.
ing the opening operation an initial peaking of effort
will be required as the drive-shaft crank leaves its
closed, toggle position. Rotation should progress
smoothly but with a noticeable increase in effort as
the blades pass beyond their half-open position. It is
at this position that the stored-energy source within
each brain begins to charge as the interrupter closes.
As the opening continues, this stored-energy source
charges and latches, and a final peaking of effort again
will be required as the drive-shaft crank goes into toggle
against its open stop. The blades will now be in the
fully open position and the interrupters will be closed,
as indicated by the gray interrupter target on the side
of each brain. See Figure 3.
Operate the switch operator with its manual oper-
ating handle to check three-pole group operation.
Dur-
L
Rorarmg-
----
Lnsulator
*..s;
y
Drive-shaft
cran
closed stop
I
-
Shipping
wires-
cut and remove
I
Rotating-ikulator
lever open stop
Flexible conduit and
stop
/
Shunt-trip solenoid housing
I
control wiring for
shunt-trip solenoids
-connects
to conduit
and wiring inside
mounting pedestal (if
furnished)
Figure 5. Mounting-frame weldment details.
7
ljm500
INSTRUCTION SHEET
Page 10 of 12
December
16,199l
S&C ELECTRIC COMPANY
l
Chicago
S&C ELECTRIC CANADA LTD.
l
Toronto
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