GE AKD-6 - Paint Refinishing Guidelines

Low
Yohoge Switchgeor,
GEK-72101
WARNING:
DE-ENE
RGIZE EQAIPMBNT COM-
PLETELY
BEFORE
DOING MAINTENANCE
WORK
ON ANY DEVICES, CONNECTIONS,
BAS
WORK, BREAKER
OR FEEDER CABLE
COMPARTMENTS.
THIS
INCLUDES
DE-
ENERGIZING ANY
CONNECTIONS TO OUT-
SIDE PRIMART
OR
SECO,NDART SOURCES,
SUCH .eS ?RAIYSFORMERS, TIE
LINES, ETC.
INSTRUMENTS,
INSTRUMENT
TRANSFORMERS
AND RELAYS
Check
and inspect all devices
to see that they
are func-
tioning
properly.
Check that
all electrical connections
are
tight. Check
mounting
of the device.
BREAKER
COMPARTMENT
INTERIORS
a. Thoroughly clean interior of the breaker
and instru-
ment compartments.
IJse a
vacuum cleaner and clean rags
only. Do
not use
steel
wool or oxide
papers.
Blowing with
compressed air is not recommended.
b. Check indicating devices, mechanical and
key
inter-
locks.
c. Check
primary
disconnecting device contacts for
signs of abnormal
wear or overheating, Discoloration of the
silvered
surfaces is
not
ordinarily harmful. These contacts
should be cleaned only by
wiping with
a
lint-free cloth.
Before
replacing the
breaker, check
the alignment
and
wipe ofr the
primary
disconnecting device contacts. Apply
a
thin coat of contact lubricant D50H47
to the house studs
and fingers
and to the
primary
disconnects
on
the
breaker.
BUS
COMPARTMENT
Before
the following can be
performed,
remove
the
steel
formed cover
between units if such covers have been fur-
nished with the equipment.
a. Inspect the buses and connections carefully for
evidence of overheating
or weakening
of
the
insulating
supports.
b. Check all connection
bolts in the bus
compartment
and
all bus mounting and
bracing bolts for
tightness.
c. Wipe and vacuum
clean the buses and supports.
d. Check
the insulation
on the bars
that run from
the
breaker studs
through the
bus
structure
to the cable com-
partment.
e. After
cleaning, megger and
record the
resistance
to
ground
and between
phases
of
all
insulated
bars, and all
buses and
connections.
Disconnect
all control circuits before
checking resistance.
Do not
use over a 1500
volt megger.
Since definite
limits cannot
be
given
for satisfactory in-
sulation
resistance
values,
a record
must be kept
of the
readings.
Weakening
of the insulation
from one mainte-
nance
period
to the next
can be recognized from
the re-
corded
readings. The
readings should
be taken under
simi-
lar conditions
each time, if
possible,
and the record should
include the
temperature and
humidity.
FEEDER
CABLE AND BUSWAY
COMPARTMENT
a. Inspect
all
main cable
connections for signs of over-
heating,
and tighten
all connections.
b. Check all bolts that
hold cable terminals
to the,con-
nection
bars for
tightness.
c. Check neutral
bus and
ground
bus
connection and
mounting
bolts
for
tightness.
d.
Check that all secondary
control
wiring connections
are
tight
and that
all control
cabling is intact.
OVERALT
SWITCHGEAR
a. Clean and inspect
all
painted
surfaces
and retouch
where necessary.
b. Check to
see that all
anchor bolts
and other struc-
tural
bolts are
tight.
c. Check
that
all breaker
and instrument
compartment
door latches
operate
properly.
Under normal
conditions,
the
protective
relays do not
operate;
therefore,
it is important
to
check
the
operation
of
these
devices
regularly.
Refer
to the Relay Instruction
Book
for tletailed instructions.
PAINT
REFINISHING
Indoor
switchgear is finished
with ANSI-61
Gray Glidden
Aqualure
Paint,
Cat. 478-E-02115,
which is applied
with
an electrostatic
spray system
and is oven baked. To re-
finish damaged
areas, remove
all loose
paint,
rust, scale,
oil
or
grease.
Sand any scratches
smooth.
Apply ANSI-61
Gray Glidden
Semi-gloss
Tie-Cote'Lacquer,
Cat.
468-E-
02111,
using
a spray
can
supplied by the factory
for
touch-up
purposes.
Outdoor
switchgear
is
finished
with an
additional
coat
of ANSI-61
gray
paint
over the
baked finish. The
primer
for
the second coat
is ANSI-61
gray
Glidden Semi-gloss
Tie-Cote
Lacquer
Cat. 468-E-02111
and the
final coat is
Diamond
Vogel ANSI-61
Gray Acrylic Lacquer
Cat.
IC-0702.
To
refinish damaged
areas, remove
all loose
paint,
rust, scale,
oil
or
grease.
Sand
any scratches
smooth.
Spray
with ANSI-61
Gray
Glidden Semi-gloss
Tie-Cote
Lacquer
Cat.
468-E-02111
as a
prime
coat,
and finish
coat by spray-
ing
with Diamond
Vogel
ANSI-61
Gray
Acrylic
Lacquer
Cat. IC-0702,
rising spray
cans
supplied
by the factory.
3r