GE AK-50 - Auxiliary Switch Adjustments and AKF Breakers; Auxiliary Switch Adjustment; AKF Breaker Auxiliary Switch Mounting; AKF Auxiliary Switch Replacement

Low
-
voltage
Power
Circuit
Breakers
Gtl
-
74600
r
2
.
Remove
mounting
hardware
at
(
2
)
and
(
7
)
.
breaker
with
the
maintenance
handle
,
with
the
safety
pin
restraining
the
clos
-
ing
springs
,
and
with
a
bell
set
across
the
"
a
”
terminals
of
the
auxiliary
switch
.
ferent
from
that
of
the
standard
AK
breakers
.
Figures
17
and
19
show the
difference
in
the
mounting
positions
,
with
the
AKF
switches rotated
90
de
-
grees
with
respect
to
the
mounting
po
-
sition
of
the standard breaker
switch
.
There
is
also
a
slight
difference
be
-
tween
the
linkage
ct
the
AKF
breaker
switches
,
however
the
principle
of
op
-
eration
remains the
same
.
3
.
Withdraw
auxiliary
switch
.
4
.
Insert
new
switch
with
arrow
on
shaft
pointing
up
and towards
the
back
of
the
breaker
as
in
Fig
.
17
.
The
closing
of
the
"
a
"
contacts
can
be
advanced
or
retarded
by
extending
or
reducing
the
external
length
of
the
operating
rod
(
5
)
.
The
length
of
the
operating
rod
(
5
)
should be
adjusted
so
that
the switch
"
a
"
contacts
close when
the
arcing
contacts
are
parted
by
1
/
8
to
1
/
4
in
.
The
operating
rod should
also be
aligned
vertically
so
that
it
is
parallel
with
the
sides
of
the
breaker
frame
center
channel and
perpendicu
-
lar
with the crossbar
(
4
)
.
This
align
-
ment
may
be
secured
by
relocating
the
washers
on
the
pin
which
connects
the
operating
rod
to
the crossbar
.
5
.
Replace
mounting
hardware and
wiring
.
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
posi
-
tion
indicator
is
also
operated
by
this
mechanism
through
link
(
12
)
.
r
Adjustments
(
Fig
.
19
)
The
auxiliary
switch
operating
rod
(
5
)
should be
adjusted
so
that
the switch
"
a
"
contacts
close
when the
arcing
con
-
tacts
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
.
The
length
of
the
operating
rod
may
be
varied
by
changing
dimension
"
a
"
(
see
Fig
.
19
)
and
aligning
the
operating
rod
as
de
-
scribed
for
the
standard
breakers
.
AKF
BREAKERS
(
Fig
.
19
)
Replacement
(
Fig
.
19
)
The
auxiliary
switch
mounting
and
linkage
on
the
AKF
breakers
are
dif
-
1
.
Disconnect
all
leads
to
auxiliary
switch
.
ELECTRICAL
CLOSING
DEVICES
AND
CONTROLS
A
closing
switch
and
motor
mecha
-
nism
are
provided
for
closing
the
breaker
electrically
.
springs
and
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
mechanic
-
ally
operated
,
reverting
to
its
origi
-
nal
position
with switch
(
1
)
contact
now
closed
and switch
(
3
)
open
,
thereby
allowing
the
motor to
charge
the
clos
-
ing springs
for
a
subsequent
closing
operation
.
fl
con
H
=
:
m
2
CLOSING
SWITCH
-
r
.
3
The
closing
button
,
when
provided
,
is
mounted
on
the
front
escutcheon
.
When
the
closing
button is
pressed
in
-
ward
it
engages
a
rod which
in
turn
operates
a
switch
,
which is mounted
on
the
front frame
to
the
right
of
the
operating
mechanism
.
c
-
IT
—
ITI
8
t
o
*
VJ
r
'
!
®
'
g
r
\
l
6
t
®
/
:
7
h
V
-
«
£
To
replace
the
closing
switch
,
dis
-
connect
the
wiring
and
remove
the
nuts
which hold
the
switch
to
its
mounting
bracket
.
5
If
the switches
do
not
function
prop
-
erly
,
they
should
be
replaced
by
dis
-
connecting
the
wiring
and
removing
them
from
their
mounting
bracket
.
f
L
_
4
CUT
-
OFF SWITCHES
(
Fig
.
20
)
The
motor
cut
-
off
switches
are
mounted
on
the
side
of
the
front frame
.
When
the
breaker
control
circuit is
energized
the
motor
circuit
is
main
-
tained
through
the
closed
contacts
of
switch
(
1
)
,
thus
charging
the
closing
springs
.
At
the
end
of
the
charging
stroke the
cut
-
off
switch is mechani
-
cally
operated
by
the
charging
of
the
CONTROL
RELAY
The
control
relay
is mounted
on
the
left
side
of
the
front frame
.
It
is used
to
open
and
close the
motor
circuit
.
To
replace
remove
wiring
and
holding
screws
.
Refer
to
Fig
.
1
for
control
relay
circuit connections
.
1
.
'
G
'
Switch
2
.
Insulation
3
.
’
F
1
Switch
4
.
Rod
5
.
Retaining
Ring
6
.
Lever
Bracket
7
.
Mounting
Bracket
8
.
Cover
Fig
.
20
.
Motor
col
-
off
switch
Courtesy of NationalSwitchgear.com