GE AK-50 User Manual

Low
-
voltage
Power
Circuit
Brmakors
GEI
-
74600
f
points
and
sliding
surfaces
should
be
lubricated
at
the
regular
inspection
periods
with
a
thin
film
of
G
-
E
Lubri
-
cant
D
50
H
15
.
Hardened
grease
and
dirt
should
be
removed
from
latch
and
bearing
surfaces
by
using
kerosene
.
ALL
EXCESS
LUBRICANT
SHOULD
BE
REMOVED
WITH
A
CLEAN
CLOTH
TO
AVOID
ANY
ACCUMU
-
LATION
OF
DIRT
OR
DUST
.
t
CO
lT
>
0
C
c
at
The
use
of
cotton
waste
to
wipe
bearing
surfaces
should
be
avoided
,
as
the
cotton
ravelings
may
become
entangled
under
the
bearing
surfaces
and
destroy
the
surface
of
the
bearing
.
r
On
drawout
breakers
,
the
contact
surface
of
the
disconnect
studs
should
be
greased
with
G
-
E
Grease
Specifica
-
tion
D
50
H
47
.
SEPARATION
OF
FRONT
AND
REAR
FRAMES
To
repair
or
replace
contacts
,
op
-
erating
mechanism
,
or
the
overcurrent
devices
,
the
front
frame
must
be
sepa
-
rated
from
the
back
frame
.
To
sepa
-
rate
the
two
frames
proceed
as
follows
:
1
.
The
breaker
contacts
must
be
open
with
the
safety
pin
in
place
.
(
See
MAINTENANCE
.
)
2
.
Remove
the
two
opening
springs
(
on
lower
part
of
breaker
)
from
the
outside
pole
units
.
3
.
Remove
the
clevis
pin
(
14
,
Fig
.
6
)
(
13
,
Fig
.
7
)
from
the
center
pole
unit
.
1
.
Manual
Maintenance
Handle
2
.
Push
Rod
3
.
Safety
Pin
View
showing
operation
of
AK
-
I
-
50
breaker
with
manual
maintenance
handle
and
installation
of
safety
pin
Fig
.
3
.
Following
the
inspection
period
,
the
closing
springs
must
be
recharged
,
the
safety
pin
removed
from
the
push
rod
,
and
the
pin
placed
in
the
retain
-
ing
spring
clip
adjacent
to
the
push
rod
.
spection
of
the
breaker
should
be
made
including
connections
,
contacts
and
flexible
connectors
.
(
At
all
times
it
is
important
not
to
permit
pencil
lines
,
paint
,
oil
or
other
foreign
materials
to
remain
on
the
in
-
sulating
surfaces
of
the
breaker
as
they
may
cause
low
resistance
between
points
of
different
potential
and
result
in
eventual
electrical
breakdown
.
INSPECTION
Periodic
inspection
of
the
circuit
breaker
is
recommended
at
least
once
a
year
.
More
frequent
inspections
are
recommended
if
severe
load
conditions
,
dust
,
moisture
or
other
unfavorable
conditions
exist
.
A
complete
inspec
-
tion
of
the
breaker
,
including
contacts
and
arc
quenchers
,
should
always
be
made
after
the
breaker
has
interrupted
a
short
-
circuit
.
4
.
Remove
the
six
nuts
from
the
back
frame
using
a
socket
wrench
with
an
extension
.
These
include
the
two
nuts
at
the
top
of
the
frame
.
5
.
Remove
the
auxiliary
switch
op
-
erating
rod
(
5
,
Fig
.
17
)
.
6
.
Check
along
the
trip
shaft
for
a
mechanical
interference
or
connection
between
the
overcurrent
trip
device
and
the
trip
paddles
.
Remove
mechani
-
cal
connection
if
present
,
or
if
inter
-
ference
exists
,
use
extreme
care
when
removing
or
re
-
assembling
front
and
back
frames
to
avoid
mechanical
break
-
age
of
trip
devices
.
In
reassembling
the
front
and
rear
frames
,
the
two
frames
should
be
positioned
vertically
so
that
the
trip
shaft
is
horizontally
aligned
.
The
breaker
should
be
operated
several
times
at
rated
voltage
to
as
-
sure
that
the
control
circuits
are
properly
connected
and
that
all
elec
-
trical
attachments
are
functioning
properly
.
A
complete
contact
inspection
,
in
-
cluding
contact
wipe
and
pressure
,
should
be
made
at
regular
inspection
periods
and
always
after
a
known
short
circuit
current
has
been
interrupted
,
to
determine
whether
the
contacts
are
worn
or
pitted
in
which
case
they
should
be
dressed
or
replaced
.
It
is
necessary
to
remove
the
arc
quenchers
to
properly
inspect
the
contacts
.
Arcing
contacts
and
arc
quencher
barriers
should
be
replaced
when
they
are
eroded
to
half
their
original
thickness
.
At
regular
inspection
periods
the
breaker
should
be
operated
manually
;
(
stored
energy
mechanisms
with
the
safety
pin
restraining
the
closing
spring
force
)
to
observe
the
contact
alignment
and
to
make
sure
all
mecha
-
nism
parts
move
freely
without
binding
or
excessive
friction
.
If
the
breaker
remains
open
or
closed
for
a
period
of
six
months
or
more
,
it
is
recommended
that
arrange
-
ments
be
made
to
open
and
close
it
several
times
in
succession
,
prefer
-
ably
under
load
.
NOTE
:
It
is
recommended
that
the
breaker
be
fastened
to
a
suitable
mounting
base
with
the
front
frame
supported
by
a
sling
or
hook
as
the
bolts
are
LUBRICATION
If
overheating
,
not
caused
by
over
-
current
.
is
observed
,
a
comnletp
in
-
In
general
,
the
circuit
breaker
re
-
miirAfi
mnHprnt
*
*
lnhriratinn
R
^
arino
-
Courtesy of NationalSwitchgear.com

GE AK-50 Specifications

General

Brand	GE
Model	AK-50
Category	Circuit breakers
Language	English