GE POWER/VAC GEK 86132A - Page 14

11.6
.
MECHANISM
Check
all
items
covered
in
INSTALLATION
and
readjust
or
tighten
hardware
as
required
.
Lubricate
as
recommended
under
LUBRICATION
.
3
Silvered
primary
contact
surfaces
such
as
the
movable
contact
rod
of
the
interrupter
and
the
primary
disconnect
fingers
should
be
wiped
clean
and
lightly
coated
with
0282
A
2048
P
009
.
Pins
of
the
secondary
disconnect
coupler
should
be
cleaned
and
lightly
coated
with
0282
A
2048
P
009
,
i
.
•
j
11
,
7
.
PRIMARY
INSULATION
PARTS
Using
dry
non
-
linting
cloth
or
industrial
-
type
wipers
,
clean
accessible
insulation
surfaces
on
the
interrupter
supports
and
operating
rod
insulators
.
In
service
locations
where
contami
-
nation
is
heavy
or
external
flashovers
have
occurred
during
interrupter
high
-
potential
testing
,
remove
the
interrupter
assemblies
per
the
procedure
in
REPAIR
AND
REPLACE
-
MENT
and
clean
the
inside
surfaces
of
the
interrupter
supports
and
the
outer
insulation
surfaces
of
the
POWER
/
ACAinterrupters
,
Be
sure
to
discharge
the
interrupter
mid
-
band
ring
before
removing
the
interrupter
assemblies
,
Re
-
moval
and
reassembly
of
interrupter
assemblies
will
normally
not
require
adjustment
due
to
the
design
of
the
interrupter
operating
rod
insulator
connection
,
They
should
be
returned
to
the
same
location
from
which
they
were
removed
.
11
,
9
.
RECOMMENDED
MAINTENANCE
The
following
operations
should
be
performed
at
each
maintenance
check
:
1
.
Perform
a
visual
inspection
of
the
breaker
.
Check
for
loose
or
damaged
parts
.
2
.
Perform
slow
closing
operation
described
under
MECHA
-
NICAL
CHECKING
AND
SLOW
CLOSING
,
3
.
Check
the
erosion
indicator
and
the
wipe
and
gap
as
described
under
DIMENSIONAL
CHECKS
.
4
.
Perform
the
vacuum
interrupter
integrity
test
as
de
-
scribed
under
ELECTRICAL
CHECKS
.
5
.
Lubricate
the
breaker
operating
mechanism
as
described
under
LUBRICATION
.
6
.
Check
the
electrical
operation
Using
the
test
cabinet
(
if
available
)
or
the
test
position
in
the
metalclad
switchgear
.
CA
UTION
REPEATED
OPERATIONS
AT
A
RATE
EX
-
CEEDING
TWO
PER
MINUTE
WILL
CAUSE
CHARG
-
ING
MOTOR
OVERHEATING
AND
SUBSEQUENT
MOTOR
FAILURE
.
7
.
Examine
the
movable
contact
rod
of
the
vacuum
interrupter
,
With
the
breaker
open
,
wipe
the
lubricant
off
the
rod
and
examine
the
silver
surface
.
The
rod
should
have
a
burnished
appearance
without
copper
appearing
through
the
silver
.
If
copper
is
visible
at
more
than
one
location
per
pole
,
or
if
the
silver
plating
is
torn
,
the
interrupter
assembly
should
be
replaced
,
Relubricate
movable
contact
rod
with
0282
A
2048
P
009
grease
.
8
.
If
desired
,
perform
the
additional
electrical
tests
(
Megger
,
Primary
and
Secondary
High
Potential
,
and
Primary
Circuit
Resistance
)
.
See
ELECTRICAL
CHECKS
11
,
8
.
LUBRICATION
Proper
lubrication
is
important
for
maintaining
reliable
circuit
breaker
performance
.
The
ML
-
18
mechanism
uses
sarihgs
which
have
a
synthetic
lining
in
some
locations
,
mese
bearings
do
not
require
lubrication
to
maintain
low
friction
,
but
lubrication
does
not
harm
them
and
oiling
lightly
is
recommended
.
Sleeve
bearings
are
used
in
some
linkage
locations
and
needle
or
roller
bearings
are
used
for
low
friction
on
trip
shaft
and
close
shaft
,
Bearings
are
lubricated
during
factory
assembly
with
grease
and
oil
,
but
all
lubricants
have
a
tendency
to
deterio
-
rate
with
age
.
Providing
a
fresh
lubricant
supply
at
periodic
intervals
is
essential
to
proper
breaker
operation
,
especially
where
frequent
operation
may
forced
lubricant
out
of
the
bearing
surfaces
.
Apply
a
few
jdrops
of
light
synthetic
machine
oil
such
as
Mobile
1
at
each
bearing
.
Apply
a
coat
of
0282
A
2048
P
009
grease
on
the
four
corners
of
the
closing
spring
guide
where
it
enters
inside
the
spring
.
.
.
Metal
-
to
-
metal
contact
surfaces
should
be
cleaned
and
lubricated
with
0282
A
2048
P
009
.
This
grease
is
available
packaged
in
a
pint
can
to
provide
cleanliness
and
prevent
oxidation
.
Electrical
primary
contact
surfaces
also
require
periodic
lubrication
to
inhibit
oxidation
and
minimize
friction
.
At
each
inspection
and
maintenance
interval
,
do
the
following
:
!
•
•
;
>
V
-
-
S
-
t
•
'
-
.
TV
12
.
TIMING
Timing
and
speed
checks
are
optional
and
also
depend
on
the
level
of
maintenance
performed
,
Generally
these
tests
are
not
required
for
normal
maintenance
,
If
a
new
mechanism
has
been
installed
or
extensive
repair
,
replacement
or
major
disassembly
has
been
performed
,
it
is
recommended
that
these
tests
be
performed
.
•
v
.
J
10
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