GE POWER/VAC 4.16 - Recommended Maintenance Practices; Paint Finish and Refinishing

4
.
Check
primary
disconnecting
device
contacts
for
signs
of
abnormal
wear
or
overheating
.
Discoloration
of
the
silvered
surfaces
is
not
ordinarily
harmful unless
atmospheric
conditions
cause
deposits
such
as
sul
-
The
primary
circuits
of
metal
-
clad
switchgear
are
in
-
sulated
in
order
to
reduce the size
of
the
equipment
.
How
-
ever
,
this
insulation
,
except
in
one
or
two
instances
,
requires
a
certain
amount
of
air
gap
between
phases
and
to
ground
to
complete
the
insulation
.
Inserting
any
object
in
this
air
space
when
equipment
is
energized
,
whether
it
be
a
tool
or
a
part
of
the
body
,
may
under certain conditions
short
cir
-
cuit this
air
gap
and
may
cause
a
breakdown
in
the
primary
circuit
to
ground
and
cause
serious
damage
or
injury
or
both
.
phides
on
the
contacts
.
If
necessary
,
the
deposits
can
be
removed
with
a
good grade
of
silver
polish
.
Sandpaper
,
steel
wool
or
abrasive
cleaners
should
never
be
used
on
silver
-
plated
parts
.
Before
replacing
breaker
,
apply
a
thin
coat
of
contact
lubricant
0282
A
2048
P
009
to
breaker studs
for
lubri
-
cation
.
Care
should be exercised
in
the maintenance and check
-
ing
procedures
that
accidental
tripping
or
operation
is
not
initiated
.
5
.
Check
to
see
that
all
anchor bolts and bolts
in
the
structure
are
tight
.
Check
tightness
and
continuity
of
all
control
connections and
wiring
.
6
.
If
the
switchgear
is
equipped
with
heaters
,
check
to
see
that all
heaters
are
energized
and
operating
.
Inspect
individual heater elements and
replace
any
which
have
failed
.
RECOMMENDED
MAINTENANCE
The
switchgear
structure
and
connections should be
given
the
following
overall
maintenance
at
each
maintenance
period
.
All
maintenance work
must
be done
with
both the
primary
and
control
power
circuits
de
-
energized
.
1
.
Thoroughly
clean
the
equipment
,
preferably using
a
heavy
-
duty
vacuum
cleaner
to
remove
all
dust
and
other
accumulations
.
Wipe
clean
the buses and
sup
-
ports
.
Inspect
the buses and
connections
carefully
for
evidence
of
overheating
or
weakening
of
the insula
-
tion
.
7
.
All
louvered exterior
openings
in
outdoor
equipment
are
furnished with
air
filters
.
The
foam
filter
elements
should be removed
,
washed
in
warm
soapy
water
,
rinsed
,
dried
and then
re
-
assembled
at
least
annually
.
Elements
should
be
inspected
before
re
-
assembly
and
replaced
if
any
signs
of
deterioration
are
evident
.
INDOOR
AND
OUTDOOR
ACRYLIC
PAINT
FINISH
The outside
of
outdoor
switchgear
has
an
acrylic
paint
finish
providing
improved
resistance
to
all
atmospheric
con
-
ditions
,
longer
life
and less
maintenance
than
with
ordinary
paint
finishes
.
2
.
Measure
the
resistance
to
ground
and between
phases
of
the
insulation
of
buses and connections with
a
1000
or
2500
volt
megger
.
Since
definite limits
cannot
be
given
for
satisfactory
insulation resistance values
,
a
record
must
be
kept
of
the
reading
.
Weakening
of
the
insulation
from
one
maintenance
period
to
the
next
can
be
recognized
from
the
recorded
readings
.
The
readings
should
be taken under
similar conditions
each
time
if
possible
,
and
the record should
include
the
temperature
and
humidity
.
High
-
potential
tests
are
not
required
,
but
if
it
seems
advisable
,
based
on
the insulation resistance
tests
or
after
repairs
,
the
test
voltage
should
not
exceed
14
kV
alternating
current
for
4.16
kV
and
27
kV
alternating
current
for
13.8
kV
equipment
.
These
voltages
are
75
percent
of
factory
test
voltages
and
are
in
accordance
with
ANSI
standards
.
PAINT
REFINISH
/
REPAIR
The
STANDARD
exterior finish
for
Indoor and
Out
-
door
equipment
is
acrylic
enamel
ANSI
61
light
gray
,
G
.
E
.
number
(
0282
A
4534
P
001
)
.
SPECIAL
exterior
finishes
(
optional
)
:
ANSI
24
blue
-
gray
(
0282
A
4534
P
002
)
,
Berkshire
(
medium
)
green
(
0282
A
4534
P
003
)
and
ANSI
70
sky
-
gray
(
0282
A
4534
P
004
)
are
acrylic
lacquer
.
If
it
is
necessary
to
refinish
or
repair
the
paint
finish
,
one
of
the
following
procedures
should
be
used
to
secure
the
best
adhesion
of
the
paint
to
the
original
finish
.
A
.
REFINISHING
WITH
ACRYLIC
ENAMEL
After
lightly
sanding
,
feathering
and
cleaning
the
area
to
be
refinished
,
apply
a
coat
of
good
acrylic
enamel
primer
-
sealer
(
0282
A
4534
P
005
)
.
Air
-
dry
the
primer
for
1
/
2
hour
,
then
apply
the
finish
color
coat
of
acrylic
enamel
.
If
the
area
is
to
be
spray
-
coated
,
thin
the
acrylic
enamel
with
(
0282
A
4534
P
006
)
.
(
This
thinning
is
only
necessary
if
the
paint
was
received
in
a
five
gallon
drum
.
)
Use
one
(
1
)
part
Voltage
transformers
and control
power
transformers
,
surge
arresters
and
surge
suppressors
must
be
discon
-
nected
during high
-
voltage
testing
.
3
.
Clean
racking
mechanism
and
lubricate
jack
screws
and
gears
with lubricant
0282
A
2048
P
009
.
A
periodic
overhaul
of
the
racking
system
should be
carried
out
if
more
than
500
operations
are
expected
in
its
lifeline
.
44
Courtesy of NationalSwitchgear.com