GE AK-50 Series - Page 12

GEK
-
7303
Low
Voltage
Power
Circuit
Breakers
l
STATIONARY
ARCING
CONTACT
2
.
PIN
(
STATIONARY
ARCING
CONTACT
)
3
.
INSULATION
4
MOVABLE ARCING CONTACT
4
A
.
STAT
INTERMEDIATE
CONTACT
5
.
MOVABLE
MAIN
CONTACT
6
SHOULDERED
PIN
7
LINK
a
PIN
(
ARCING
CONTACT
LINK
)
9
.
INSULATING
LINK
IQ
PIN
(
INSULATING
LI N K
)
IOA
.
ADJUSTING
PLATE
11
.
PIN
(
SIDE
LINK
)
12
.
CLEVIS
13
.
CLEVIS
PIN
14
.
LOWER
STUD
15
.
POLE
UNIT
BASE
16
SPRING
(
MAIN
MOVABLE
CONTACT
)
17
.
PIN
(
MOVABLE
MAIN
CONTACT
)
18
PIN
(
MOVABLE
ARCING
CONTACT
)
19
.
SIDE
LINK
20
.
SPRING
(
STATIONARY
MAIN
CONTACT
)
21
.
SPRING
(
STATIONARY
ARCING
CONTACT
)
22
.
UPPER
STUD
23
.
PIN
(
STATIONARY
MAIN
CONTACT
)
24
.
STATIONARY
MAIN
CONTACT
25
.
TOP
CONTACT
BLOCK
)
~
u
Fig
.
7
(
215
D
174
)
Pole
unit
assembly
-
AK
-
75
and
AK
-
100
The
movable
arcing
contacts
(
4
)
should
be
replaced
when
the
stationary
arcing
contacts
are
replaced
.
scribed
above
.
2
.
Remove
screws
(
27
)
and
remove
bracket
which holds
pin
(
25
)
in
place
.
3
.
Remove
main
-
and
intermediate
-
contact
stop
(
20
A
)
which holds
the
lower
part
of
stationary
contact
.
Removal
will
be
facilitated
if
the
force
on
the
contact
springs
(
21
)
is
neutralized
.
This
can
be
accomplished
by
operating
the
breaker
with the
maintenance
handle
,
with the
safety
pin
in
place
,
until
the
load
on
the
contact
stop
is
relieved
.
Separate
the
front
frame
from
the back
frame
as
described
under
SEPARATION
OF
FRONT
AND
REAR
FRAMES
.
1
.
2
.
Remove
pins
(
8
)
and
(
19
)
and
withdraw
the
contacts
.
3
.
Reassemble
parts
in
reverse
order
.
Stationary
,
Intermediate and
Main
Contacts
(
Fig
.
6
)
Remove
stationary
arcing
ctonacts
as
de
-
4
o
Loosen
the
hardware
which
fastens
the
upper
stud
to
the
pole
unit base until the
contact
1
.
12
Courtesy of NationalSwitchgear.com