GE AM-4.16-250-6 - Page 8

GEI
-
88761
Magne
-
blast
Circuit
Breaker
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
)
.
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
the
interrupter
along
the
diverging
arc
runners
.
This
At
the
time
/
R
24
—
r
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i
'
V
)
>
1
T
I
-
'
v
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'
V
;
I
2
t
K
-
-
:
;
.
v
-
.
f t
cr
M
;
N
,
r
:
j
i
L
'
13
T
K
14
15
/
25
16
/
Fig
.
7
(
0114
C
5320
)
Sectional
Side
View
of
Mechanism
1
.
Handle
2
.
Trip
Coil
Support
3
.
Trip
Coil
4
.
Trip
Armature
5
.
Prop
Reset
Spring
6
.
Cam
Follower
Roller
7
.
Trip
Shaft
8
.
Trip
Latch
9
.
Trip
Latch
Roller
10
.
Trip
Latch
Roller
Support
11
.
Crankshaft
12
.
Cranks
13
.
Prop
Pin
14
.
Prop
15
.
Drive
Shaft
16
.
Cam
.
17
.
Check
Nut
18
.
Stop
Plate
19
.
Spring
Rod
20
.
Spring
21
.
Spring
22
.
Spring
Guide
23
.
Stop
Pin
24
.
Main
Shaft
Bearing
25
.
Cam
Shaft
Bearing
8
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