Allis-Chalmers MA-150, Instruction Book

Page: 12 / 48

Ihe
closing springs (4-6)
will charge as soon as the breaker control
�us is ene
r
gi
z
ed
.
Sho�ld the sp�ings not charge, check the motor
ct·toff
adjust;nent.
1.see
Section
3.13)"
The springs ca�
be
manually charged by inserting the charging handle
do�n
guide tube (l-27) to engage the gearmotor. Rotate the handle
ir the
direction
shown
until the spring linkage
is
he
ar
d
to go over
toggle
(see Section
3.l(b}
REMOVE CMARGiNG HANDLE FROM BR�AKER BEFORE ENERGiZING
9REAKE� CC�T�Ol
CIRCU!T.
Wnen the springs are fully charged, the breaker can be closed manually
by
pulling 13nyard ll-26) or electrically by energizing the closing
sircuit. This rotates latch (4-13) allowing the springs (4-6) to
close
the
�reaker.
The breaker can be tripped manually by depressing trip rod (1-43) or
electrically
by
ene1·grzrng the trip circuit. This rotates latch
(4-27) allowing
the
c losing
J
inkage to col lapse and reset.
The tripping action described above can take place at any time during
a closing operation, either manual or electrical, and regardless of
whetner or
not
the armature is energizedo Thus the mechanism is
electrically and mechanically trip-free in any position.
3,5
SlOW-CLOSiNG BREAKER
In
order to check and make contact adjustments, the
breaker can be
closed slowiy
and
mechanically held in any position of the closing
stroke The following procedure should be followed:
a)
Remove breaker fro� cubicle and tilt arc chutes back.
b) Be certain that control circuit is open and closing springs are
dischal'ged.
c}
Insert
mechanism
locking pin into hole (.1-28), it wi
J I
be
necessary
to
rotate lever (1-29) to allow pin
to
pass through
hole The
pin
shoLld pass behind crank
(J-30)
and through
�ole
in �pposite si�e
of operator frame.
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