GE AK-50 User Manual

GEI
-
7
A
600
Low
-
voltage
Power
Circuit
Breakers
)
'
r
f
,
b
o
Rear
view
of front
frame
—
AK
-
J
-
50
showing
cam
shaft
locking
p
/
ate
being
loosened
Fig
.
12
.
Rear
view
of front frame
—
AK
-
1
-
50
showing
com
shaft
locking
plate
and
cam
shaft
removed
Fig
.
13
.
|
3
.
Disconnect the
leads
from
motor
*
and
remove
the wires attached
to
gear
unit
housing
.
first
tooth of the ratchet
wheel
(
17
)
,
thus
beginning
to
charge
the
closing
springs
.
The
subsequent
closing
han
-
dle strokes
perform
the
same
function
as
the
pawls
(
21
)
engage
the
teeth
in
the ratchet wheel
(
17
)
,
thus
rotating
the
ratchet wheel and
output
crank
(
32
)
and completely
charging
the
closing
springs
.
This
rotation
of
the
ratchet
wheel and
output
crank is
in
a
counter
-
clockwise
direction
from
the lower
po
-
sition
,
through
slightly
more
than
180
degrees
,
to
a
position
just
beyond
dead
center
.
In
this
position
the
closing
springs
are
free
to
release
their
en
-
ergy
,
closing
the
breaker
at
a
high
speed
.
nism
similar
to
the mechanism used
on
the
AK
-
2
-
50
,
-
75
and
-
100
elec
-
trical
breakers
.
The
closing
springs
(
5
)
are
charged by
operating
the manual
closing
handle
(
22
)
on
the
front of
the
breaker
,
instead
of
the
closing
motor
as
is
the
case
with the
electrical
breaker
.
Closing
this breaker
is
ac
-
complished
by
pumping
the
operating
handle
four
complete
cycles
,
first
counterclockwise
through
120
degrees
from
its
normal vertical
position
and
then clockwise back
through
120
de
-
grees
.
When
approximately
70
de
-
grees
of
the
fourth
clockwise
stroke
have
been
completed
,
the
closing
’
springs
,
which have
been
charged
dur
-
ing
the
previous
strokes
of
the
closing
handle
,
are
driven
over
-
center
and
the
breaker
closes
.
4
.
Remove
four
bolts
at
the bottom
of
the
front frame
and
one
bolt
at
top
of
gear
reduction
unit
.
The
motor
and
gear
unit
may
now
be removed
.
NOTE
:
If
it
is
desired
to
re
-
place
only
the
motor
unit
,
dis
-
connect
the
motor
leads
and
re
-
move
only
the
hardware
fasten
-
ing
it
to
the
gear
-
reduction
unit
.
When
removing
the
motor
only
,
the
front frame
should be
placed
front
side
down
to
pre
-
vent
the oil
escaping
from
the
gear
unit
.
Inserting
the
Safety
Pin
(
Fig
.
14
)
If
it
is
desired
to
slowly
close
the
breaker
contacts
to
check
contact
wipe
and
sequence
,
operate
the
closing
han
-
dle
3
1
/
2
complete
cycles
as
described
above
.
At
the end
of
the fourth
coun
-
terclockwise
stroke and
before
per
-
forming
the
fourth
clockwise
stroke
,
insert the
safety
pin
(
3
)
into the hole
(
4
)
in
the
guide
rod
(
6
)
,
thus
prevent
-
ing
the
closing
springs
(
5
)
from
releas
-
ing
their
energy
to
close
the
breaker
contacts
.
The
gear
reduction
unit contains
4
ounces
of
oil
similar
to
Atlantic
Re
-
fining
Company
’
s
Grade
HFS
No
.
3
.
It
should
not
be
necessary
to
add
or
change
oil
except
when the
gear
-
reduc
-
tion unit
and
motor
are
disassembled
.
This mechanism
consists
basically
of
a
closing spring
assembly
,
ratchet
wheel and
output
crank
assembly
,
handle
shaft
and
pawl
assembly
,
and
the
closing
handle
.
STORED
-
ENERGY
MANUAL
MECHANISM
(
Fig
.
14
)
—
AK
-
2
-
50
,
-
75
and
-
100
This
breaker
is
equipped
with
a
spring
-
charged
stored
-
energy
mecha
-
Closing
the
Breaker
(
Fig
.
14
)
The first
stroke
of
the
closing
handle
causes
the
ratchet
pawls
(
21
)
attached
to
the
handle
shaft
(
23
)
,
to
engage
the
Courtesy of NationalSwitchgear.com

GE AK-50 Specifications

General

Brand	GE
Model	AK-50
Category	Circuit breakers
Language	English