GE AK-1-15 Maintenance Manual

1. With outside poles open, loosen adjustment
plate (10) of center pole on crossbar (9 ) by
freein g- .; bolt locking tab and loosening bolts (11).
_ 2. . If center-pole wipe or overlap is to be
increased, move the adjustment plate to the left;
if it is to be decreased, move it to the ri ght.
3. After proper adjus tment is made, ti ghten
adjus
tment plate bolts until plate is snu g. Then
tap adjustment plate in such a way as to bring
lower edge of slot in plate to bear ag ainst bolt.
Tighten
bolt until lockwasher is fully c ompres sed.
Then
form locking tabs over bolt heads so that
bolts are securely held in place.
NOTE: If the above adjustment has been made,
it is necessary to - recheck the outer-pole wipe.
If this is outside the prescribed limits, correct
as described in POLE UNIT ASSEMBLY.
4. If proper wipe cannot be obtained within
the range of the adjus tment described above, it
will be necessary to obtain further adjustment by
_
means of the vertical - shims (14) provided for the
purpose. In order to accomplish this, proceed
as follows: ·
a. Separate the front - frame from the back
frame (see SEPARATION OF FRONT AND REAR
FRAMES).
· b. Loosen - screw (13) and remove bolt (15).
c. Remove vertical shims (14) to decrease .
wipe; add
to increase •.
d. Replace bolt (i5) and· ti g hten screw (13).
e. Re as semble front and back frame .
Adiusting Center-pole Open
Contact G_ap (Fig. 17}
Improper open contact gap of the center pole
may be ad j usted by -the following procedure.
1. Loosen screw (13) and bolt (15).
2. If gap is to be increased, horizontal shims -
(14) should
be remove ·d, . If it is to be decreased ,
they should be added. Shims may be removed by
sliding them to the front of the breaker. They
are · slotted for eas y r_emoval. (Effect of this ad-
j1.:1stmen~ on contact wipe and overlap is negligible.)
3.
Ti ghten hardware.
Contact Replacement ·
-
Stationary Contacts (Fi g. 17 )
- .
1: Remove arc quencher (s ee ARC QUENCHER).
2. Remove screw (5) from braid.
3. Drift out pin (4) and remove co ntacts.
4. Reassemble in reverse ord er wi th new
Low Voltage
Power Circuit Breakers GEK -7 303
contacts.
5. Check contact overlap anc;l wipe, and re-
adjust if necessary (see above).
Movable Contacts (Fi g. 17)
1. Remove arc quencher (see ARC _QUEN-
CHER).
2. Remove tru-ar c r e tainers on right side of
pins (7) and (16).
3. Drift pins (7) and (16) to the.left far enough
to free movable contacts.
4. Reassemble in reverse order with new
contacts.
5. Check contact overlap and wipe and re -
adjust if necessary (see above}.
,--- -- --- 9
,----- --a
---- - 7
,-- --- - 6
r--- - - - 5
,---- 4
Fig. 18 (0133C9020) Auxiliary. switc~ linkag-e
·
-standard breaker -
AUXILIARY SWITCH
AK BREAKERS (Fig, 18)
The auxiliary switch is used to make and break
various control circuits as the circuit breaker is
opened and closed , The auxiliary switch is mounted
on the left side of thefrontframe . As the crossbar
(4) moves, with the contacts, to the open or closed
position
it operates a triangular link (6) through
an operating rod · (5). The triangular link rotates
the operating
shaft (8) of the auxiliary switch, which,
through
cams located on this shaft, opens and closes
the auxiliary switch contacts. The_ top terminals
of the switch are "a" - contacts (open when the
breaker is open) and the bottom terminals are "b"
contacts (closed when U1e bro ak o ;r is open).
Repl~mmenl (Fig. 18)
1. Disconnect all leads to auxiliary switch.
21

GE AK-1-15 Specifications

General

Brand	GE
Model	AK-1-15
Category	Circuit breakers
Language	English