ment has been previously set and
should not
®
altered.
Remove wire from terminal
2
on timer module and Insulate.
Open breaker and charge opening springs.
Apply closing voltage and observe light emitting diode
(LED) adjacent to delay adjustment. The "LED" should be
brightly illuminated when the trip latch is fully reset. De·
press latch with manual trip lever an d observe the "LED"
goes out. Release trip lever and the "LED" should come
on. This sequence confirms sensors operation.
Do
not
apply closing control voltage for longer than two minutes
while performing this test.
MANUAL CHARGING OF CLOSI N G SPRINGS
To charge the closing springs manually, disconnect
control power before inserting the manual spring charging
crank in the socket located in the center of the left hand
operator panel. Turn the crank in a counter-clockwise direc·
tion to charge the springs. The effort to charge the closing
springs will fluctuate and will increase to a peak and then
decrease. At the point of least effort an audible click will
be
heard and the effort to turn the crank will drop to near
zero.
The
mechanism is now fully charged. Remove manual
charging crank. The breaker may be closed by pulling the
manual close pull rod.
CAUTI ON
MAINTAIN A FI R M G R I P ON CRANK. The
closing springs
are
charged through the driving
pawl and ratchet wheel and are thereby indexed
by
th
e
holding pawl.
Some springback
can
occur
between
to
o
t
h pos
it
i
o
n
s
o
n th
e r
at
c
h
et
wh
e
el
.
MAl NTENANCE
SLOW
CLOSE
With
the
breaker removed from the cubicle, manually
charge
the closing springs as previously described and
re·
move charging handle. Then, from the rear or stud side of
the
breaker, attach
the
s
p
ri
ng blocking device (Figure 15),
by
fastening
it in
the slots in the closing spring tubes. Insert
the spring blocking device into operator area before setting
up
arc
chute
support.
Stay clear of the breaker contacts and pull the manual
close pull rod at the front of the breaker. This will discharge
the closing springs against the spring blocking device during
which the breaker contacts will move slightly toward the
closed position.
Place the manual spring charging crank back in the
socket. By turning the crank counterclockwise, the breaker
contacts may be slowly closed for checking contact align·
ment.
-24-
CAUTION
MAINTA I N A FI R M GRIP ON CRANK. As
the contacts will close in increments determined
by the teeth on the ratchet wheel, springback
will occur between tooth positions.
REMOVAL OF SPR I N G BLOCKING DEVICE
To remove the closing spring blocking device (Figure
16), the closing spring must be fully charged. The spring
may be charged manually by inserting the charging crank
and continuing counterclockwise rotation. The main con
tacts will go fully closed as the four bar linkage toggles.
Upon continued rotation, the closing springs will be picked·
up as noted by increased effort in cranking. Continue
rotation until the springs are fully charged. A sharp click
will be heard as the spring release rollers engage the close
latch indicating full spring charge has been achieved. The
spring blocking device may now be easily removed by
pulling the blocking portion from the slots in the spring
tubes.
REMOVAL OF C LOSING SPRINGS (SPR INGS MUST BE
DISCHARGED)
The closing springs may be quickly and safely re
moved from the breaker. Remove two of the four bolts
holding the spring beating block at
the
rear of the breaker.
These bolts should be diagonally opposite each other. Insert
studs approximately 6" ( 150 mm) long in place of bolts.
Remove the remaining two bolts by shifting the spring load
to the 6" (150 mm) long studs. The spring bearing block
can
then be backed off by alternating backing off the studs.
To install the closing springs the reverse procedure should
be used. The spring bearing block top surface should be
even with the bracket of the frame. The four bolts should
be torqued to 50 ft. lbs.
(67
.8
N-m).
If the charging ratchet and cams are to be revolved
with springs removed, it is advisable to remove the two
aluminum spring drive hlocks (Item 38, Figure 8) secured
to the ratchet and
cam
crankpins by retaining rings. These
pins if not rerr. ·ved or held essentially in a horizontal posi
tion may
jam
while revolving the cam and ratchet assembly.
Motor Cutoff Switch
-
The 88 motor cutoff switch
assembly (Figure 16) is factory adjusted. If it should
become inoperative, entire unit must be removed and
inspected for contact wear. Replacement may be neces
sary
.
Motor Cutoff Switch Adj ustment - is most conve
niently performed before installing the charging springs.
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. ElectricalPartManuals
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Summary of Contents for FC-10008
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