GE AK-50 Series - Shunt-Tripping Device; Shunt-Tripping Device Adjustments; Shunt-Tripping Device Coil Replacement; Bell Alarm and Lockout Device

GEK
-
7303
Low
Voltage
Power
Circuit
Breakers
12
M
L
.
.
T
7
*
2
/
10
3
9
1
.
SPRING
2
.
PIN
3
.
FRAME
4
.
WEIGHT
5
.
SCREWS
6
.
MAGNET
7
.
COIL
8
.
CLAMP
9
.
ARMATURE
10
.
ARMATURE
ARM
11
.
TRIP
PADDLE
12
.
CLAMP
8
l
!
FH
:
•
i
N
4
u
£
5
li
'
1
!
i
S H E
:
-
-
%
j
4
>
6
I
Fig
.
45
(
0133
C
9021
)
Shunt
tripping
device
3
.
Bend
lower
end
of
clamp
(
8
)
straight
and
remove
.
SHUNT
-
TRIPPING
DEVICE
(
FIG
.
45
)
The
shunt
tripping
device
is
mounted
on
a
bracket
attached
to
the
left
side
of
the
operating
mechanism
(
looking
from
the
front
)
.
A
remote
switch
or
relay
contacts
are
used
to
close
the
circuit
of
the
device
causing
the
armature
(
9
)
to
engage
the
trip
paddle
(
11
)
,
thereby
tripping
the
breaker
.
The
spring
(
2
)
is
used
to
return
the
armature
to
the
neutral
position
after
the
breaker
trips
.
To
prevent
overheating
,
the
coil
(
7
)
is
cut
off
by
contacts
of
the
auxiliary
switch
which
are
open
when
the
breaker
is
open
.
ADJUSTMENTS
From
1
/
32
in
.
to
1
/
16
-
in
.
over
-
travel
of
the
armature
is
required
when
the
breaker
is
tripped
.
If
any
adjustment
is
necessary
to
provide
this
amount
of
overtravel
,
the
trip
lever
is
bent
in
or
out
accordingly
.
REPLACEMENT
OF
COIL
(
Fig
.
45
)
1
.
Disconnect
leads
to
coil
(
7
)
.
2
.
Remove
magnet
(
6
)
and
coil
from
frame
4
.
Remove
coil
and
install
new
coil
in
re
-
verse
order
.
BELL
ALARM
AND
LOCKOUT
DEVICE
(
FIG
.
46
)
The
device
operating
link
(
2
)
is
engaged
with
the
breaker
crossbar
side
-
link
pin
(
1
)
,
thereby
operating
the
device
whenever
the
breaker
is
tripped
by
the
overcurrent
trip
devices
,
the
under
-
voltage
device
or
the
drawout
trip
interlock
.
The
shunt
trip
device
and
the
manual
trip
button
will
defeat
the
device
.
The
bell
alarm
and
lockout
device
can
be
reset
only
by
the
manual
trip
button
on
the
front
escutcheon
,
is
omitted
,
the
device
can
be
reset
by
manual
trip
button
or
by
closing
the
breaker
,
provided
the
fault
has
been
eliminated
.
If
the
lockout
device
Adjustments
1
.
Adjust
the
bell
alarm
-
device
latch
(
4
)
so
that
a
clearance
of
1
/
16
in
.
±
1
/
64
in
.
is
main
-
tained
with
the
catch
(
15
)
when
the
breaker
is
closed
.
2
.
With
the
breaker
fully
open
,
adjust
the
device
adjusting
screw
(
12
)
,
on
the
operating
arm
(
13
)
,
for
an
overtravel
of
1
/
16
to
3
/
32
of
an
in
.
after
the
device
contacts
are
just
touching
This
will
assure
that
the
device
is
operated
when
the
(
3
)
.
44
Courtesy of NationalSwitchgear.com