GE POWER/VAC GEK 86132A - Page 10

8
.
DIMENSIONAL CHECKS
With
the
breaker
closed
and
the
gag
plate
installed
,
perform
the
following
dimensional
checks
:
Measure
the
distance
between
the
two
lines
.
A
caliper
wi
give
an
accurate
reading
of
the
contact
gap
,
Dimension
0
The
gaps
must
be
between
the
0.600
inch
maximum
and
0
.
S
4
inch minimum
.
It
is
not
necessary
that
all
readings
cOrres
pond
,
A
properly
adjusted
breaker
will
have
more
gap
an
wipe
on
the
center
pole
than
on
the
outside
poles
.
The
following
dimensional
checks
are
in
the
operatin
mechanism which
is
accessible
from
the
bottom
.
To
accommc
date
these checks
,
the
breaker
should
be
turned
on
its
rigb
side
resting
on
two
-
by
-
fours
.
DO
NOT
use
the
portabl
breaker
lift
truck
.
CAUTION
:
do
not
allow
anything
to
com
in
contact
with the interlock
roller
on
the
right
side
of
th
mechanism
.
T
;
V
(
8.1
.
PRIMARY
CONTACT EROSION
With
the
closed
position
,
the erosion
disk
(
5
,
Fig
,
7
)
below
the
operating
rod
insulator
is
aligned
with
a
reference
arm
(
4
,
Fig
.
7
)
on
new
interrupters
.
As
contact
erosion
occurs
,
the
erosion
disk
will
move
upward
from
alignment
with
that
reference
arm
.
This
is
dimension
E
in
Figure
7
,
Detail
A
,
When
erosion
reaches
1
/
8
inch
,
the
POWER
/
VAC
*
inter
-
rupter
^
should be
replaced
.
Do
not
readjust
the
alignment of
the
erosion
indicator
arm
except
when
installing
a
new
vacuum
interrupter
,
8.4
.
CLOSE COIL
PLUNGER
GAP
The close
coil
plunger
gap
is
shown
in
Figure
C
.
With
th
'
closing
spring
discharged
,
operate
the
plunger
to
imak
<
certain
that
the
plunger
moves
freely
over
its
full
stroke
itith
coil
.
To
check
the
closing
coil
plunger
gap
the
breaker
sjbtduh
be
open
and
the
closing spring
charged
and
gagged
.
Dimen
sion
C
is
obtained
depressing
the
close
plunger
button
unti
resistance
is
felt
.
The
gap
between
the
plunger
button and
th
<
coil
housing
should
be
between
0.250
and
0.300
of
an
inch
.
8.5
.
TRIP
COIL
PLUNGER
GAP
8.2
.
SPRING
WIPE
With
the
breaker
closed
and
the
closing spring
gagged
,
measure
with
a
feeler
gauge
and
record
the
distance
between
the
top
of
the
wipe
indicator
and the bottom
of
the
erosion
disk
for
each
phase
(
see
Figure
W
,
Dimension
W
)
,
Trip
the
breaker
with
the
closing
spring
gag
plate
still
installed
and
measure
and record
the
distance
between
the
wipe
indicator
and
erosion disk
.
Subtract
the
closed
position
measurement
from
the
open
position
measurement
.
The
result
is the
amount
of
wipe
on
each
individual
pole
.
The
wipe
,
dimension
W
,
is
to
be
greater
than
0.075
inch
.
Adjustment
is
not
required
until
wipe
is
0.075
inch
or
less
.
If
adjustment
is
required
see
WIPE
ADJUSTMENT
in
MECHANICAL
ADJUST
-
MENTS
section
.
The
ML
-
18
mechanism
is
furnished
with
very
low
gradient
wipe
springs
so
that
adjustment
is
not
a
precision operation
and
considerable
loss
of
wipe
can
be
tolerated without
affecting
performance
.
The
trip
coil
plunger
gap
is
shown
in
Figure
T
.
With
th
<
breaker
in
the
open
position
and the
closing
spring
jn
tin
charged
position
,
make
certain
that
the
trip
linkage
and
trip
shaft
move
freely
over
the
full
plunger
travel
.
To
check
tin
trip
coil
plunger
gap
adjustment
,
the
breaker
is
to
be closet
with
the
closing spring
discharged
.
Dimension
T
between
the
plunger
button
and
the
coil
housing
should
be
between
6.20
C
and
0.250
inch
.
This
dimension
is
obtained
when
the
trip
plunger
button
is
depressed
until
resistance is felt
.
If
the
breaker
is
equipped
with
an
optional
second
trip
coil
;
us
<
same
procedure
.
8.6
.
CONTROL
SWITCH
ADJUSTMENT
•
‘
vV
:
:
;
'
V
'
;
L
7
8.3
.
CONTACT
GAP
The
method
of
measuring
the
contact
gap
is
as
follows
:
With
the
breaker
in
the
open
position
,
the
closing springs
charged
and
the
closing
spring
gag
plate
installed
,
apply
a
piece
of
masking
tape
to
the
surface of
the
operating
rod
insulator
as
shown
in
Figure
G
.
Using
a
reference
block
,
make
a
mark
on
the
tape
near
the
top
on
all
three
poles
.
It
is
also
advisable
to
put
a
reference
mark
on
the
tape
to
identify
to
which
pole
the
tape
is
applied
.
Remove
the
closing
spring
gag
plate
and close
the breaker
,
Using
the
same
procedure
as
above
,
re
-
mark
the
tape
.
This
new
mark
will
be
near
the
bottom
of
the
tape
.
Trip
the
breaker
,
remove
the
tapes
and
re
-
apply
them
to
a
flat
surface
.
The
breaker
is
to
be
in
the
open
position
with
the
opening
and
closing
springs
discharged
.
This
results
in
the
control
switch
plungers
being
in
the
depressed
position
.
The
switches
to
be
checked
.
are
shown
in
Figure
S
.
On
the
LCS
and
stacked
switches
(
SM
/
LS & CHG
)
,
the
plunger
rod
is
to
be
recessed
within
the
rear
of
the
switch
body
and
this
recess
is
to
be
6
to
1
/
32
inch
.
This is
a
visual
check
.
The
CL
/
MS
switch
with
wiring
terminals
on
the side
is
to
be
adjusted
as
described
above
.
For
the
CL
/
MS
switch
with
wiring
terminals
on
the
rear
the
plunger
is
set to
a
dimension
of
0.990
to
1.010
”
from
its
mounting
bracket
.
The
breaker
can now
be
placed
,
in
its
normal
upright
position
.
•
*
V
*
6
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