GE AK-50 Series - Page 14

GEK
-
7303
Low
Voltage
Power
Circuit
Breakers
FIG
-
1
IB
MECHAMSM
IN
RESET
P
03
TICN
MECHANISM
IN
NOTION
BEFORE
RESETTING
AS
SHOWN
IN
FIG
.
-
11
B
15
it
—
15
2
-
3
u
9
1
.
Pin
2
.
Bushing
3
.
Bracket
4
.
Indicator
5
.
Bracket
6
.
Frame
7
.
Crank
Roller
8
.
Gear
Reduc
-
tion
Unit
9
.
Motor
10
.
Crank
11
.
Paddle
12
.
Closing
Cam
Roller
13
.
Closing
Cam
Arm
14
.
Crank
Shaft
15
.
Spring
Charg
-
ing
Arm
16
.
Closing
Spring
17
.
Push
Rod
18
.
Clip
FIG
-
11
C
MECHANISM
IN
CLOSED
POSITION
(
CLOSING
SPRING DISCHARGED
)
1
.
Spring
2
.
Cam
3
.
Link
4
.
Reset
Spring
4
A
.
Spring
Adjusting
Nuts
5
.
Prop
6
.
Adjusting
Screw
7
.
Adjusting
Screw
Stop
Pin
8
.
Prop
Return
Spring
9
.
Roller
10
.
Trip
Latch
11
.
T
rip
Shaft
12
.
Clevis
Pin
13
.
Clevis
14
.
Latch
Buffer
Stop
(
Bronze
Material
)
15
.
Roller
16
.
Prop
Fig
.
10
(
541
E
304
)
Closing
spring
and
charging
mechanism
3
.
As
the crank
turns
,
the roller
pushes
the
paddle
arm
upward
,
thereby
charging
the
closing
springs
through
the
spring
charging
arm
(
15
)
of
the
crank shaft
.
4
.
As
the
charging
roller
approaches
dead
center
a
cut
-
off
switch
opens
,
de
-
energizing
the
motor
circuit
.
Fig
.
11
(
541
E
305
)
Operating
mechanism
Closing
the
Breaker
Electrically
Operated
(
Fig
.
10
)
1
.
With
the
mechanism
in
the
position
described
above
and
the
closing
springs
charged
,
applying
a
closing
signal
will
cause
the
motor to
continue
to
charge
the
closing
springs
allowing
the
mech
-
anism
to reset
,
if
not
already
reset
,
to
the
posi
-
tion shown
in
Fig
.
11
B
.
5
.
The
breaker
is
now
ready
to
close
when
a
closing
signal
is
given
.
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
.
11
B
)
with
respect
to
the
cam
(
2
,
Fig
.
11
B
)
.
14
Courtesy of NationalSwitchgear.com