GE AK-50 Series - Page 10

Low
Voltage
Power
Circuit
Breakers
GEK
-
7303
TABLE
I
Intermediate
Contacts
Arcing
Contacts
Main
Contacts
Pres
-
sure
in
Lbs
.
Wipe
No
.
of
Zontacts
Per
Pole
Wipe
No
.
of
Contacts
Per
Pole
Pres
-
sure
In
Lbs
.
Wipe
No
.
of
in
Contacts
Inches
/
Per
Pole
Pres
-
sure
in
Lbs
.
Breaker
Type
in
in
Inches
Inches
4
/
64
to
12
/
64
to
18
/
64
12
/
64
to
18
/
64
12
/
64
to
18
/
64
12
/
64
to
18
/
64
12
/
64
to
18
/
64
12
/
64
to
18
/
64
12
/
64
to
18
/
64
AK
-
50
for
AC
3
55
to
65
31
to
43
55
to
65
2
1
*
7
/
64
1
/
16
to
AK
-
50
for
DC
3
3
31
to
43
55
to
65
55
to
65
1
7
/
64
1
/
16
to
AK
-
75
for
AC
35
to
45
35
to
45
31
to
43
5
3
1
7
/
64
1
/
16
to
AK
-
75
for
DC
35
to
45
5
35
to
45
5
31
to
43
1
*
7
/
64
1
/
16
to
AK
-
100
for
AC
AK
-
100
for
DC
8
25
to
35
25
to
35
31
to
43
2
5
7
/
64
1
/
16
to
AKF
-
2
C
3
55
to
65
55
to
65
2
31
to
43
1
*
7
/
64
(
Outside
Poles
)
25
to
35
1
/
16
to
AKF
-
2
D
(
Outside
AKF
-
2
E
(
Poles
)
55
to
65
31
to
43
5
3
1
7
/
64
AKF
-
2
C
(
Field
AKF
-
2
D
Discharge
Contacts
)
28
/
64
to
40
/
64
0
10
to
16
0
2
*
*
*
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
.
against
the
stationary
arcing
contacts
at
a
point
measured
in
line
with
the
break
between
the
contact
stop
and
the
contact
pivot
block
.
Push
the
contact
backward
until
dimension
"
B
"
recorded
in
item
2
is
reached
.
effect
.
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
.
The
scale
should
then
be
read
.
4
.
If
the
pressure
is
not
within
the
require
-
ments
listed
on
TABLE
I
,
refer
to
the
section
of
these
instructions
dealing
with
ADJUSTING
CONTACT
WIPE
AND
PRESSURE
.
ADJUSTING
CONTACT
WIPE
AND
PRESSURE
(
Fig
.
6
)
1
.
To
obtain
proper
contact
wipe
and
pressure
on
the
center
pole
,
dimension
"
A
"
should
be
increased
to
increase
wipe
and
decreased
to
decrease
wipe
.
2
.
To
change
dimension
"
A
"
remove
the
clevis
pin
(
14
)
and
rotate
the
clevis
as
necessary
.
3
.
To
prevent
overstressing
the
clevis
threads
(
13
)
dimension
,
TAft
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
adjusting
plate
(
10
A
)
center
pole
to
the
right
will
simultaneously
in
-
crease
the
wipe
on
both
outside
poles
;
moving
the
adjusting
plate
to
the
left
will
have
the
reverse
If
the
proper
contact
pressure
NOTE
:
does
not
exist
when
the
contact
wipe
is
within
its
limits
,
the
stationary
contacts
springs
should
be
replaced
.
CONTACT
SEQUENCE
(
Fig
.
6
)
On
the
horizontal
plane
,
the
difference
in
the
making
of
the
arcing
contacts
on
the
same
pole
must
be
no
greater
than
1
/
32
in
.
;
the
difference
be
-
tween
arcing
contacts
on
separate
poles
1
/
16
in
.
If
it
is
desired
to
advance
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
,
using
the
center
pole
as
a
reference
.
Upon
retight
-
ening
adjustment
plate
bolts
,
make
sure
the
lock
-
ing
tabs
are
turned
up
around
bolt
heads
,
locking
the
bolts
securely
in
place
.
on
the
Contact
sequence
in
the
vertical
plane
should
be
such
that
when
the
arcing
contacts
are
just
touching
,
the
intermediate
contact
gap
should
be
10
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