GE AK-50 User Manual

GE
1
-
74600
Low
-
voltage
Power
Circuit
Breakers
1
.
Stationary
Arcing
Contact
2
.
Movable
Arcing
Contact
3
.
Stationary
Main
Contact
4
.
Clamp
5
.
Movable
Main
Contact
Fronf
view
of
back
frame
assembly
—
AK
-
50
6
.
Crossbar
7
.
Series
Overcurrent
Device
8
.
Movable
Intermediate
Contact
9
.
Stationary
Intermediate
Contact
1
.
Upper
Contact
Block
2
.
Stationary
Arcing
Contact
3
.
Movable
Arcing
Contact
4
.
Stationary
Main
Contact
5
.
Stationary
Intermediate
Contact
Fig
.
9
.
springs
charged
,
applying
a
closing
signal
will
cause
the
motor
to
continue
to
charge
-
the
closing
springs
allowing
the
mechanism
to
reset
,
if
not
already
reset
,
to
the
position
shown
in
Fig
.
11
B
.
6
.
Lower
Contact
Block
7
.
Movable
Main
Contact
8
.
Movable
Interme
-
diate
Contact
9
.
Crossbar
Front
view
of
back
frame
assembly
—
AK
-
10
C
handle
clockwise
to
its
normal
posi
-
tion
.
It
is
recommended
that
the
clock
-
wise
closing
stroke
be
performed
with
a
relatively
fast
-
snapping
action
to
avoid
burning
of
the
breaker
contacts
,
if
closed
under
load
.
Fig
.
S
.
“
barging
the
Closing
Springs
(
Fig
.
10
)
i
1
.
The
mechanism
in
position
is
shown
in
Fig
.
11
A
.
2
.
The
motor
turns
the
crank
(
10
)
which
is
mounted
on
the
output
shaft
of
the
gear
reduction
unit
.
The
charg
-
ing
roller
,
which
is
on
the
face
of
the
crank
,
has
paddle
arm
(
11
)
bearing
on
Tripping
the
Breoker
(
Fig
.
11
)
2
.
As
the
crank
roller
(
7
)
passes
its
top
dead
-
center
position
,
(
maxi
-
mum
spring
charge
position
)
the
clos
-
ing
springs
are
free
to
discharge
.
Crank
(
10
)
can
be
overdriven
inde
-
pendently
of
the
motor
so
that
roller
(
7
)
assumes
its
bottom
dead
-
center
position
without
restraint
.
Operation
of
any
of
the
trip
devices
rotates
the
trip
shaft
(
11
)
which
allows
the
trip
latch
(
10
)
to
release
the
latch
prop
(
5
)
.
This
allows
the
forces
of
the
contact
and
opening
springs
to
reposi
-
tion
the
operating
mechanism
linkage
to
the
position
shown
in
Fig
.
HA
.
In
this
position
,
the
operating
cycle
may
be
repeated
.
it
.
3
.
As
the
crank
turns
,
the
roller
pushes
the
paddle
arm
upward
,
there
-
by
charging
the
closing
springs
through
the
spring
charging
arm
(
15
)
of
the
crank
shaft
.
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
,
Fig
.
11
)
.
Prop
(
16
,
Fig
.
11
)
holds
cam
(
2
,
Fig
.
11
C
)
in
this
position
.
4
.
As
the
charging
roller
approaches
dead
center
a
cut
-
off
switch
opens
,
de
-
energizing
the
motor
circuit
.
5
,
The
breaker
is
now
ready
to
close
when
a
closing
signal
is
given
.
Adjustments
(
Fig
.
11
)
All
adjustments
should
be
made
with
the
operating
mechanism
in
the
reset
position
as
shown
in
Fig
.
11
B
.
(
The
mechanism
should
be
reset
by
manual
operation
with
the
safety
pin
in
place
.
)
4
.
Raising
clevis
(
13
,
Fig
.
11
C
)
closes
the
breaker
contacts
through
the
pole
base
linkage
.
6
.
With
the
breaker
resting
at
the
precharge
position
,
the
trip
latch
may
or
may
not
be
in
the
reset
position
.
This
depends
on
the
position
of
roller
(
15
,
Fig
.
1
IB
)
with
respect
to
the
cam
(
2
,
Fig
.
11
B
)
.
Closing
the
Breaker
Electrically
Operated
(
Fig
.
10
)
Manually
Operated
(
AK
-
1
-
50
)
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
screw
(
6
)
.
Functionally
,
the
manual
breaker
closing
action
is
the
same
as
the
elec
-
trical
breaker
,
except
the
resetting
action
is
accomplished
by
rotating
the
manual
closing
handle
counterclock
-
wise
to
reset
the
latch
.
The
closing
2
.
The
center
line
of
the
trip
latch
1
.
With
the
mechanism
in
the
po
-
/
*
A
\
_
t
%
J
A
%
—
\
-
.
+
Courtesy of NationalSwitchgear.com

GE AK-50 Specifications

General

Brand	GE
Model	AK-50
Category	Circuit breakers
Language	English