GE AK-1-15 Maintenance Manual

Fig. 1i (8018989) Rear view of fronnrame-
AK-50 showing cam shaft locking plate
being loosened
~ 2.. As the crank . roller (7) passes its top
dead-center position, (maximu.m spring charge
position) the closing springs are free to discharge.
Crank (10) can be overdriven independently of the
motor so - that roller (7) assumes its bottom dead-
center position without restraint. :-
·
3. As the springs discharge, the rotation of
the
crank shaft '(14) causes roller (15, Fig. 11)
to rotate cam (2, Fig. 11) and raise clevis (13,
F.ig.
11). Prop (16, Fig. 11) holds cam (2, Fig .
llC) in this position ~
4. Raising
clevis (13, Fig. llC) closes the
breaker contacts through the pole base linkage.
Tripping the Breaker (Fig. 11)
·Operation of -any of the trip devices rotates
the trip shaft (11) which ;µlows the trip latch (10)
to release the latch prop (5). This allows the
forces of the· contact and opening springs to
reposition
the operating mechanism linkage to
the
position shown in Fig. llA, In this position,
the operating·
cycle may be repeated.
Adjustments (Fig. 11)
All adjustments should be made with the opera-
ting
mechanism · in the reset position as shown in
Low Voltage
Power Circuit Breakers GEK-7303
' .. . . ' ; .. ~ .. ' : . ... ~. ·· :·· ·•. -
•1: .
.. .!:.:
Fig. 13 (8018984) Rear view of front frame-
AK-50 showing cam shaft locking plate
~nd cam shaft removed -
Fig. llB. (The mechanism should be reset by
manual operation with_ the safety pin in place
and with
roller (15) clear of cam-(2).
1. The gap between.the trip latch (10) .and the
roller (9) of the reset latch should be between
1/64 in , and 1/32 in. This adjustment can be
obtained by
turning sc . rew (6).. - · -
2. · The center line of the trip latch (10)
should
pass through the center of the roller (9). The
latch
buffer stop on the mechanism frame can
be adjusted by loosening the retaining screws to
reposition the latch with respect to the roller.
3. The . distance between ·the roller on link
(3) and prop (5) should be between 1/64 in. and
1/
32 in. To obtain this gap, advance or retard
the nuts (4A) on -the bottom of the ~d ~ing
.the reset spring (4).
Replacement
When replacing the operating mechanism, refer
to the section titled SEPARATION OF FRONT
AND BACK FRAMES under MAINTENANCE in
these instructions.
The motor is mounted on the side of the g ear-
15

GE AK-1-15 Specifications

General

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