GE AK-1-15 Maintenance Manual

. AKF BREAKERS (Fig . 20) .
. The . auxiliary switch mounting and linkage ··
on the .AKF breakers are different . from that of the
standard AK breakers. Figures 17 and 19 show
the difference in the mounting positions, with
the AKF switches rotated 90 degrees with respect
to the mounting position of the standard breaker
switch. There is also a s~ight difference between
the linkage · of the AKF bre·~er . switches, however
the principle of ope r ation remains the same .
When
the breaker operates, the movement of
the crossbar (4) rotates triangular link (11) about
fixed center (1). This rotational motion is trans -
mitted to the auxiliary - switch shaft (3) by the
linkage comprised of links (10), (8) and (6). The
breaker position indicator is also operated by
this mechanism · through link (12). ·
R epla ceiMnt (Fig. 20)
1. Disconnect all leads to . auxiliary switch.
2. - Remove mounting .. bolts _ (2) and (7).
3. Withdraw auxiliary switch. ·
4. Insert new switch with arrowonshaftpoint-
ing up and towards the back of the breaker as in
Fig . 18.
5.
Replace _mounting hardware and wiring.
Adjustments (Fig. 20) _
The auxiliary switc h operating rod (5) should .
be adjusted so that the switch "a" contacts close
when
the arcing contacts of the outer poles are
parted by 1/8 to 1 /4 in . -. This dimension may be
checked
in the same manner described for the
standard breakers . T he length of the operating
rod may be varied by . changing dimension "a"
(see Fig . 19)· and aligning the operating rod as
describ~d for t!_le standar<:I ~reakers.
ELECTRICAL CLOSING DEVICES
AND CONTRO~
-
· A closing switch and motor mechanism are
provided for cl osing the breaker electrically.
CLOSING SWITCH
The closing button, when provided . is mounted
on the front frame behind the escutcheon . A hole is
provided in the escutcheon to allow operation of.the
switch. Remove the escutcheon to gain access
to the switch.
CUT .; OfF SWITCHES (Fig. 21)
The motor cut-off switches are mounted on the
side of the front frame . When the breake r control
circuit is energized the motor circui t is main-
tained .through the cl osed contacts of switch (1), thus
charging the closing springs. At the end of the
charging stroke the cut -off switch is mechanically
operated by the charging of the springs and
Low Voltage
Power Circuit Breakers GEK-7303
through the operating rod (4), thus opening switch
(1) contacts and closing switch (3) . contacts. This
opens the motor circuit until a closing signal
is given. When a closing signal is given the motor
is energized through . switch (3) contact, further
charging . the closing springs and closing the
breaker. When the breaker closes, the cut -off
switch is again mechanically operated, reverting
to its original position with switch (1) contact now
closed and switch (3) open, thereby allowing the
motor to charge the closing springs for a sub-
sequent closing operation. Most breakers have two
normally open auxiliary contacts in series with
the motor circuit to prevent pre - charging the
closing
springs with the breaker closed.
If the switches do not function properly, they
should
be replaced by disconnecting the wiring
and removing them from their mounting bracket.
I
I
- -- -+-- --- 8
cin =r-- -,.. --- 7
6
.: _j '-
L .. - ..
Fig. 21 (242C599) Motor cut -off switch
1. 'G ' Switch
2. Insulation
5. Retaining Ring .
· 6.
Lever Bracket
3. 'F ' Switch
7. Mounting Bracket
4. Rod
8. Cover -
CONTROL RELAY
The control re lay · is mounted on the left side
of the front frame. It is used to open and cl ose
the motor circuit. To r epl ace . remove wiring
and holding
screws. See item 3, Fig. 2. ·
PROTEalVE DEVICES
STATIC TI ME DELAY UNDE .R-
VOL
TAGE TRIPP ING · oE · v1cE
(Fig. 22)
The Static Time Delay Unde rv o lta ge Trippi ng

GE AK-1-15 Specifications

General

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