GE AK-50 User Manual

Low
-
voltage
Power
Circuit
Breakers
GCI
-
74600
TABLE
I
r
-
•
*
Intermediate
Contacts
Main
Contacts
Arcing
Contacts
Pres
-
sure
in
Lbs
.
Wipe
No
.
of
Contacts
Per
Pole
Pres
-
sure
in
Lbs
.
No
.
of
Contacts
Per
Pole
Pres
-
sure
in
Lbs
.
No
.
of
Contacts
Per
Pole
Wipe Wipe
Breaker
Type
in
in
in
Inches
Inches Inches
1
/
16
to
16
/
64
to
23
/
64
55
to
65
AK
-
50
for
AC
3
55
to
65
I
2
31
to
43
*
3
/
32
1
/
16
to
16
/
64
to
23
/
64
AK
-
50
for
DC
55
to
65 3 31
to
43
3
55
to
65
1
3
/
32
r
1
/
16
to
16
/
64
to
23
/
64
AK
-
75
for
AC
35
to
45
1
35
to
45 3 31
to
43
5
*
3
/
32
1
/
16
to
16
/
64
to
23
/
64
AK
-
75
for
DC
5
35
to
45
1
35
to
45
5
31
to
43
*
3
/
32
1
/
16
to
16
/
64
to
23
/
64
AK
-
100
for
AC
AK
-
100
for
DC
25
to
35
2
25
to
35
5
*
8 31
to
43
3
/
32
16
/
64
to
23
/
64
1
/
16
to
55
to
65
1
55
to
65
2
AKF
-
1
C
(
Outside
Poles
)
3
*
31
to
43
3
/
32
AKF
-
lD
(
Outside
AKF
-
2
D
Poles
)
1
/
16
to
16
/
64
to
23
/
64
55
to
65
5
55
to
65
1
*
3
31
to
43
3
/
32
AKF
-
1
C
(
Field
AKF
-
ID
Discharge
Contacts
)
3
/
16
to
7
/
16
*
*
2
* *
10
to
16
0
0
c
*
The intermediate
contact
wipe
should be
at
least
1
/
16
in
.
greater
than main
contact
wipe
.
*
*
Left
stationary
contact
extends
approximately
3
/
32
in
.
±
1
/
32
further
than
right
hand
contact
.
least
3
/
16
in
.
,
the
main
contacts
gap
at
least
1
/
4
in
.
ADJUSTING
CONTACT
WIPE
AND
PRESSURE
(
Pig
.
6
)
NOTE
:
If
the
proper
contact
pressure
does
not
exist
when
the
contact
wipe
is
within its
limits
,
the
stationary
contacts
springs
should be
replaced
.
NOTE
:
This
check
can
best be
made
by
means
of
the mainte
-
nance
handle
,
with
the
safety
pin
restraining
the
closing
springs
.
1
.
To
obtain
proper
contact
wipe
and
pressure
on
the
center
pole
,
di
-
mension
"
A
”
should
be
increased
to
increase
wipe
and
decreased
to
de
-
crease
wipe
.
CONTACT
SEQUENCE
(
Pig
.
6
)
On
the horizontal
plane
,
the
dif
-
ference
in
the
making
of
the
arcing
contacts
on
the
same
pole
must
be
no
greater
than
1
/
32
in
.
;
the difference
between
arcing
contacts
on
separate
poles
1
/
16
in
.
If
it
is
desired
to
ad
-
vance
or
retard the
closing
of
the
main
contacts
of
a
pole
,
loosen the bolts
holding
the
adjustment
plate
(
10
A
)
of
that
pole
and
slide
plate
to
the
left
to
advance
contact
closing
,
or
to
the
right
to
retard
contact
closing
.
Make
this
adjustment
on
the
outer
poles
,
us
-
ing
the
center
pole
as
a
reference
.
Upon
retightening
adjustment
plate
bolts
,
make
sure
the
locking
tabs
are
turned
up
around bolt
heads
,
locking
the
bolts
securely
in
place
.
If
the
gap
is
under the
required
mini
-
mum
,
it
is
usually
possible
to
form
the
arcing
contacts
and
obtain
the
re
-
quired
dimensions
.
To
form
the
con
-
tacts
,
place
apiece
of
conduit
approxi
-
mately
two
feet
long
,
over
the
contact
and
form
the
contact
either
forward
or
backward
.
If
the
proper
dimensions
are
still
not
obtained
the movable
arc
-
ing
contacts
should be
replaced
.
2
.
To
change
dimension
MA
”
re
-
move
the
clevis
pin
(
14
)
and
rotate
the
clevis
as
necessary
.
3
.
To
prevent
overstressing
the
clevis threads
(
13
)
dimension
tTA
"
should
not
exceed
3
/
16
in
.
and
space
"
A
"
should
be filled
with
shims
to
0.005
in
.
of
being
solid
.
4
,
With
the
proper
center
pole
wipe
obtained
,
moving
the crossbar
adjust
-
ing
plate
(
10
A
)
on
the
center
pole
to
the
right
will
simultaneously
increase
the
wipe
on
both
outside
poles
;
moving
the
adjusting
plate
to
the
left will
have the
reverse
effect
.
If
it
has been
necessary
to
make
any
adjustments
while
obtaining
proper
contact
sequence
,
the
contact
wipe
and
pressure
must
be
checked
,
and
adjusted
,
if
necessary
.
5
,
To
increase the
wipe
on
either
outside
pole
individually
,
move
the
crossbar
adjusting
plate
of
that
pole
to
the
left
;
to
decrease
the
wipe
move
the
adjusting
plate
to
the
right
.
CONTACT
GAP
(
Fig
.
6
)
Contact
sequence
in
the vertical
plane
should
be
such
that
when the
arc
-
ing
contacts
are
just
touching
,
the
in
-
termediate
contact
gap
should
be
at
When
the breaker is
open
,
the
gap
between the movable
and
stationary
contacts
should
be
between
2
5
/
8
in
.
\
4
Courtesy of NationalSwitchgear.com

GE AK-50 Specifications

General

Brand	GE
Model	AK-50
Category	Circuit breakers
Language	English