Verify the following:
(a)
During the opening sequence, the interrupter target
on the side of each brain housing changes from
gray to yellow when the interrupter is opened, then
back to gray, indicating the normally closed
position of the interrupter. In addition, the
-
interrupter target remains gray when the
Circuit-
Switcher
is
closed, indicating that the interrupter
is closed.
(b) As the Circuit-Switcher reaches either the fully
open or fully closed position, the drive-shaft crank
strikes firmly against the appropriate drive-shaft
crank stop. See Figure 5. Also, note that each
rotating-insulator lever makes contact with its
respective open stop.
(c) The blade crank-arm at the top of each brain rests
against the blade crank-arm stop in the fully open
position.
(d) No more than a
%-inch
gap exists between each
blade crank-arm and its associated blade
crank-
arm stop in the closed position. See Figure 6.
(e) Upon closing, the current-carrying tongue contacts
on each disconnect blade enter the
current-
carrying jaw contacts with equal clearance on each
side. See Figure 7.
Open stop-blade crank-arm
must contact open stop in open position
Closed stop-%-inch
gap allowable in closed
position
\
Blade crank-arm
rlgure
ti.
trtaae
mecnamsm
aerass.
Should any of the foregoing checks indicate that
adjustments are required, contact the nearest S&C
Sales Office.
bumper stop
contacts
Figure 7. Tongue-contact and jaw-contact assemblies
shown in partially closed and fully closed positions.
q
S&C
ELECTRlC
COMPANY
l
Chicago
S&C ELECTRIC CANADA LTD.
l
Toronto
INSTRUCTION SHEET
7
111500
Page 11 of 12
December
16,199i
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