GE ML-14-0 - SPECIFIC ADJUSTMENTS AND CHECKS; CLOSING CAM CLEARANCE; AUXILIARY SWITCH-TYPE SB-12

GEK
7153
Spring
-
charged
Operating
Mechanism
Type
ML
-
14
-
0
W
o
oo
ON
CO
'
w
'
NO
oh
>
«
*
r
1
-
~
'
V
*
«
.
$
)
6
.
Manual
Charging
Stud
and
Wrench
7
.
Driving
Link
8
.
Monitoring
Switch
Mounting
Bracket
9
.
Closing
Coil
(
52
CC
)
10
,
Closing
Coil
Plunger
1
.
Motor
Support
Bolts
2
.
Driving
Motor
3
.
Closing
Latch
Monitoring
Switch
4
.
Ratchet
Wheel
5
.
Eccentric
Fig
.
6
Closing
Devices
is
closed
,
No
adjustment
is
provided
and
a
visual
inspection
is
usually
all
that
is
required
.
If
for
some
reason
the
auxiliary
switch
is
removed
it
must
be
properly
reinstalled
.
The
“
V
”
stamped
on
the
SB
*
12
auxiliary
switch
shaft
must
point
toward
the
switch
terminals
or
180
degrees
away
from
the
terminals
to
pre
-
vent
overlap
of
the
contacts
.
If
“
a
”
and
“
b
”
contacts
overlap
somewhat
during
the
breaker
stroke
the
auxiliary
switch
is
assembled
incorrectly
and
must
be
properly
reset
,
Remove
the
switch
oper
-
ator
from
the
square
shaft
.
Rotate
the
square
shaft
until
the
arrow
on
the
end
of
the
shaft
is
pointing
toward
the
upper
front
corner
of
the
switch
mounting
plate
with
the
breaker
in
the
open
position
.
Install
the
switch
operator
and
make
certain
there
is
no
overlap
between
the
“
a
”
and
“
b
”
contacts
during
the
breaker
stroke
.
er
stroke
is
increased
by
lowering
the
dashpots
and
/
or
the
toggle
setting
at
its
minimum
(
FKA
)
and
/
or
internal
stops
at
their
minimums
(
FK
)
and
/
or
shortening
of
the
vertical
operating
rod
.
AUXILIARY
SWITCH
-
TYPE
SB
-
12
Refer
to
Fig
.
11
and
to
“
L
”
,
Fig
.
15
.
The
auxiliary
switch
(
19
)
,
Fig
.
11
,
is
mounted
on
the
left
side
of
the
operating
mechanism
frame
(
2
)
.
The
linkage
(
59
)
attached
to
the
pin
(
40
)
,
Fig
.
10
,
of
the
output
crank
(
4
)
operates
the
auxiliary
switch
shaft
which
opens
and
closes
the
“
a
”
and
"
b
”
contacts
.
The
“
a
”
contacts
are
open
when
the
breaker
is
open
and
the
“
b
”
contacts
are
open
when
the
breaker
is
closed
.
The
“
a
”
contacts
need
only
to
be
checked
to
make
certain
they
are
open
when
the
breaker
is
open
.
The
“
b
”
contacts
need
only
to
be
checked
to
see
that
they
are
open
when
the
breaker
the
switch
cam
(
6
)
until
the
motor
limit
switch
striker
(
26
)
has
traveled
the
maximum
amount
(
about
180
degrees
rotation
of
the
cam
)
.
Loosen
the
mounting
bolt
(
28
)
and
rotate
the
switch
support
(
16
)
,
Fig
.
4
,
until
the
gap
be
-
tween
the
motor
limit
switch
striker
(
26
)
,
Fig
.
9
,
and
the
switch
support
(
16
)
,
Fig
.
4
,
is
0.032
to
0.005
inch
.
CLOSING
CAM
CLEARANCE
Refer
to
Fig
.
18
.
The
sum
of
"
C
”
plus
“
R
”
should
not
exceed
0
,
170
inch
.
This
clearance
is
affected
by
the
adjust
-
ment
of
the
breaker
opening
dashpots
,
toggle
setting
(
FKA
)
,
internal
stops
(
FK
)
,
and
vertical
operating
rod
length
.
Normal
-
ly
no
adjustment
is
required
;
however
,
this
clearance
should
be
checked
if
the
breaker
settings
are
changed
,
The
closing
cam
clearance
is
reduced
when
the
break
-
10
Courtesy of NationalSwitchgear.com