GE POWER/VAC GEK 86132A - Page 8

trip
buttons
on
the
circuit
breaker
.
The
closing
spring
may
be
manually
charged
,
and
a
method
for
slow
closing
the
primary
contacts
is
available
when
the
circuit
breaker
is
withdrawn
from
the
metalclad
cubicle
.
See
MECHANICAL
CHECK
-
ING
AND
SLOW
CLOSING
,
The
mechanism
will
operate
at
the
a
-
c
or
d
-
c
voltage
indicated
on
the
circuit
breaker
nameplate
.
Manual
pumping
of
the
handle
advances
the
ratchet
wheel
and
the
holding
pawl
prevents
counter
-
rotation
while
,
the
handle
is
returning
for
another
stroke
.
Six
to
eight
complete
strokes
of
the
manual
handle
are
required
for
one
complete
spring
-
charging
operation
.
When
the
spring
charge
indicatoj
(
9
,
Fig
.
3
)
shows
“
CHARGED
”
,
MANUAL
CHARGING
MUST
BE
DISCONTINUED
TO
AVOID
MECHANISM
DAMAGE
.
5.2
.
CLOSING
OPERATION
.
(
REFER
TO
FIG
.
9
)
By
either
energizing
the
close
solenoid
or
depressing
the
manual
close
button
,
the
close
latch
(
8
,
view
C
)
is
rotated
,
releasing
the
closing
spring
(
1
,
view
B
)
.
This
action
releases
the
'
energy
in
the
closing
spring
and
transmits
it
to
the
closing
cam
(
9
,
view
D
)
and
closing
roller
(
10
,
view
D
)
arid
causes
the
linkage
to
rise
until
the
prop
(
1
l
,
view
D
)
can
Slip
under
the
close
roller
(
10
,
view
D
)
and
hold
the
linkage
in
place
.
As
the
linkage
moves
,
the
output
crank
(
12
,
view
D
)
rotates
the
cross
shaft
(
13
,
view
D
)
which
in
turn
rotates
the
phase
bell
cranks
(
14
,
view
E
)
on
all
three
poles
.
The
rotation
of
the
phase
bell
cranks
compresses
the
two
opening
springs
(
15
,
view
E
)
on
poles
1
and
3
,
closes
the
vacuum
interrupters
and
compresses
the
wipe
springs
(
16
,
view
E
)
on
each
pole
.
The
rotation
of
the
cross
shaft
(
13
,
view
D
)
also
changes
the
auxilliary
switch
(
17
,
view
D
)
position
and
the
position
flag
on
the
front
panel
will
then
indicate
“
CLOSED
”
.
After
the
breaker
is
closed
,
the
charging
motor
is
again
energized
and
the
closing
spring
is
charged
as
described
under
“
CLOSE
SPRING
CHARG
-
ING
”
.
Spring
charging
is
possible
when
the
breaker
is
in
the
closed
position
because
the
linkage
is
held
in
place
by
the
prop
.
C
-
s
5.1
,
CLOSE
SPRING
CHARGING
Figure
9
shows
a
front
view
of
the
ML
-
18
in
a
schematic
form
.
The
primary
contacts
are
open
and
the
closing
springs
charged
.
The
closing
spring
charging
system
consists
of
a
closing
spring
(
l
.
view
B
)
mounted
on
the
left
side
of
the
breaker
and
the
electrical
charging
system
mounted
on
the
right
side
of
the
breaker
.
Both
components
are
fastened
to
the
cam
shaft
(
2
,
view
B
)
,
A
manual
charging
system
(
3
,
view
A
)
is
provided
so
that
the
mechanism
can
be
slow
closed
and
the
closing
spring
can
be
charged
if
there
is
a
loss
of
electrical
control
power
.
Spring
charging
is
accomplished
electrically
by
a
rotating
eccentric
on
the
output
shaft
of
the
gear
motor
driving
pivoted
charging
arms
(
4
,
view
C
)
that
oscillate
about
the
centerline
of
a
ratchet
wheel
(
5
,
view
C
)
.
A
driving
pawl
(
6
,
view
C
)
,
mounted
within
the
charging
arms
,
oscillates
with
the
charging
arms
.
Starting
from
its
rear
-
most
position
,
as
the
charging
arms
rotate
forward
,
a
spring
forces
engagement
of
the
driving
pawl
with
a
tooth
on
the
ratchet
wheel
.
The
ratchet
wheel
is
advanced
by
the
rotating
charging
arms
and
pawl
assembly
.
Advancement
of
one
tooth
spacing
is
provided
for
each
oscillation
of
the
system
,
The
ratchet
motion
is
restricted
to
one
direction
by
a
spring
-
loaded
holding
pawl
that
prevents
the
ratchet
wheel
from
going
backwards
as
the
charging
arms
oscillate
back
to
pick
up
the
next
tooth
.
Thirteen
complete
cycles
of
the
charging
arms
are
needed
for
a
full
charge
of
the
closing
spring
.
The
efficient
,
compact
gear
motor
accomplishes
this
action
in
just
about
two
seconds
.
When
the
charging
cycle
is
.
^
omplete
,
the
ratchet
wheel
is
positioned
so
that
a
missing
to
.
oth
is
adjacent
to
the
driving
pawl
and
any
motor
overspin
will
not
drive
the
ratchet
wheel
,
thus
preventing
damage
to
the
system
,
When
the
spring
is
completely
charged
,
the
assembly
is
retained
in
that
position
by
the
close
latch
,
until
it
is
desired
to
close
the
circuit
breaker
.
The
closing
coil
cannot
be
electrically
energized
unless
the
closing
spring
is
completely
charged
.
This
action
is
prevented
by
the
52
CHG
switch
in
the
closing
circuit
.
The
manual
charging
system
(
3
,
view
A
)
works
directly
on
the
cam
shaft
where
a
one
-
way
clutch
(
7
,
view
A
)
driven
by
a
manual
handle
provides
rotation
of
the
ratchet
wheel
.
i
5.3
.
OPENING
OPERATION
.
(
REFER
TO
FIG
.
9
)
By
either
energizing
the
trip
solenoid
(
18
,
view
.
B
)
or
depressing
the
manual
trip
button
(
23
,
view
B
)
,
the
trip
,
latch
(
19
,
view
D
)
is
rotated
,
permitting
the
linkage
to
collapse
and
the
vacuum
interrupter
contacts
to
open
under
the
force
of
the
wipe
springs
(
16
,
view
E
)
and
opening
springs
(
15
,
view
E
)
,
At
the
end
of
the
opening
stroke
the
center
phase
wipe
spring
assemble
hits
the
stop
on
the
frame
that
limits
overtravel
and
rebound
,
Rotation
of
the
cross
shaft
from
the
closed
to
the
open
position
operates
the
auxiliary
switch
(
17
,
view
D
)
which
opens
the
trip
coil
circuit
.
If
the
closing
spring
has
been
recharged
,
the
linkage
will
be
reset
and
the
trip
latch
will
be
in
place
on
the
trip
roller
ready
for
another
closing
operation
.
V
*
?
:
>
"
*
:
v
If
the
closing
spring
has
not
been
recharged
,
the
trip
latch
may
be
held
out
of
position
.
A
latch
-
checking
switch
(
21
.
,
view
C
)
will
not
close
unless
the
latch
is
in
its
normal
position
!
The
contacts
of
this
latch
-
checking
switch
are
in
the
closing
circuit
so
that
electrical
closing
is
blocked
when
the
trip
latch
not
reset
.
4
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