GE AM-4.16-250-9 - Page 8

H
!
GEK
-
41902
Magne
-
blast
Circuit
Breaker
:
i
I
;
the
contacts
of
the
latch
monitoring
switch
closes
to
permit
the
spring
charging
motor
to
be
energiz
-
ed
and
recharge
the
closing
springs
.
Opening
Operation
The
breaker
can
be
opened
either
electrically
by
energizing
the
trip
coil
(
3
)
Figure
5
,
or
man
-
ually
by
pushing
the
trip
lever
(
8
)
.
In
each
method
the
trip
latch
is
rotated
off
the
trip
latch
roller
,
permitting
the
operating
mechanism
linkage
to
collapse
.
The
energy
stored
in
the
opening
springs
is
released
to
provide
the
required
opening
speed
for
successful
interruption
of
the
circuit
.
As
the
breaker
opens
to
interrupt
a
current
,
the
arc
first
starts
at
the
arcing
contacts
(
6
&
27
)
Figure
8
,
transfers
to
the
arc
runner
(
4
&
10
)
and
energizes
the
blow
-
out
coils
(
3
&
11
)
.
This
action
introduces
a
magnetic
field
between
the
pole
pieces
(
5
&
9
)
of
the
interrupter
that
forces
the
arc
deeper
into
the
arc
chute
(
8
)
.
the
arcing
contacts
part
a
discharge
of
air
is
expelled
through
the
booster
tube
(
28
)
across
the
arc
.
This
air
flow
assists
the
arc
transfer
and
interruption
by
blowing
the
arc
away
from
the
contacts
and
into
the
arc
chute
.
The
magnetic
field
forces
the
arc
deeper
into
thq
interrupter
along
the
diverging
arc
runners
.
i
I
:
At
the
time
;
Fig
.
7
(
0114
C
5320
)
Sectional
Side
View
of
Mechanism
18
.
Stop
Plate
19
.
Spring
Rod
20
.
Spring
21
.
Spring
22
.
Spring
Guide
23
.
Stop
Pin
24
.
Main
Shaft
Bearing
25
.
Cam
Shaft
Bearing
10
.
Trip
Latch
Roller
Support
11
.
Crank
Shaft
12
.
Cranks
13
.
Prop
Pin
14
.
Prop
15
.
Drive
Shaft
16
.
Cam
.
17
.
Check
Nut
1
.
Handle
Trip
Coil
Support
Trip
Coil
Trip
Armature
Prop
Reset
Spring
Cam
Follower
Roller
Trip
Shaft
Trip
Latch
Trip
Latch
Roller
2
.
3
.
4
.
5
.
6
.
I
7
.
8
.
9
,
8
Courtesy of NationalSwitchgear.com