Functional electrical test on breaker may be made to confirm sensors operation. The timing modules
nameplate and rated voltage should be checked to insure it matches breaker closing control voltage.
The timers delay adjustment has been previously set and should not be altered. Removed wire from
terminal 2
on
timer module and insulate. Open breaker and charge opening springs.
Apply
closin g
voltage and observe light emitting diode (led} adjacent to delay adjustment. The led
should be brightly illuminated when the trip latch is fully reset. Depress latch with manual trip level
and observe the led goes out. Release trip lever and the led should come on. This sequence confirms
sensor operation. Do not apply closing control voltage for longer than two minutes while performing
the test.
MAN UAL CHA RGI N G OR CLOSI NG SPRI NG S
T o c harge the cl osin g sprin gs manual ly, di sc onn ec t con trol p ower before in serti n g the m anual
c hargi n g crank in the socket l ocated in the cen ter of the l eft han d operator panel . T um the
crank in a c ountercl ockwi se directi on to ch arge the sprin gs. The effort to c har ge the cl osi n g
sprin gs wi l l fluctu ate and wi l l increase to a peak and then decre ase . A t the p oint of l east
effort an audible click wil l be he ard an d the effort to tu m the crank wil l drop to nea r zero.
The mechani sm i s n ow ful l y ch arged. Remove man ual charging crank. T he breaker may be
cl osed by pul lin g the manual cl ose pul l rod .
CAUTI O N ! I
A FI RM G RI P ON CRAN K
The cl osin g springs are ch ar ged throu gh the drivin g pa wl an d ratch et wheel an d are th ereb y
indexed by the hol din g p awl
•
Some sprin gback can occ ur between tooth p osi ti on s on th e ra tch et
wheel .
REMOVAL OF CLOSI NG SPRI N G S
The Closing Springs may be quickly and safety removed from the breaker. Remove two of the four bolts
holding the spring bearing block at the rear of the breaker. These bolts should be diagonally opposite each
other. Insert studs approximately 6"
(
150mm) long in
place
of bolts. Remove the remaining two bolts by
shifting
the spring load
to
the 6"
(
150mm}
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).
CAUTI ON : Han dl e thi s assembl y c areful l y- do n ot throw or drop .
I f the c hargi n g r atche t and c am s are to be revolved with sprin gs removed , i t i s advi sable to
remove tw o alumi num
drive bl ock s (I tem 38, Fig. 8) sec ured to the ratchet and c am
crankpins by retaining rings. These drive blocks
if
not removed or held essentially
in
a horizontal position
may jam while revolving the cam and ratchet assembly.
Motor Cutoff Switch -The
88
motor control switch assembly ( Fig.
1 3)
is factory adjusted. If it should
become inoperative, the entire unit must be removed and inspected. Replacement may be necessary.
Jv\otor Cut off Swi tch
- Thi s ad ju stmen t i s most c onveniently perform ed before i n
sprin gs.
Advance ratc het and c om a ssembl ies
to
p osi ti on shown (Fi g. 13). The b ock up p awl mu st occupy
the ninth (9) tooth p osi ti on on the ratchet a s c oun ted coun tercl ock wi se from area .on ratche t
periphery w hich l acks two teeth.
-11-
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