16
in the bolt head.
This bolt must be installed with the bolt
head up so as to accept the power factor check device
cap.
All
bushing flange installation bolts are to be
tightened to a maximum torque of 250 inch-pounds.
Greater torque may damage the bushing flange. Bolts
should be tightened in an alternating diagonal pattern to
properly seat the gasket. For normal operation, the power
factor check device cap is to be tightened down so that
it seats on the bushing flange ground washer.
Note:
Before installing the flange bolt in the ground
washer position, clean the ground washer surface if nec
essary to assure good contact.)
Specific condenser bushing construction is described in
the following Instruction Leaflets:
Outdoor Condenser Bushing, Type RCP-IL48-061-69
"ASA" Condenser Bushing, Type S
&
OS-IL-48-0614
Outdoor Condenser, Type 0, 69 KV-IL-48-061-32
Condenser Bushing Installation
Before installing in the apparatus, wipe the bushing clean
of all dust, grease or particles of packing material using
cloths wrung out of transformer oil, and finish with a dry
cloth.
On Type "OS" bushings, remove the wrapping from
the lower end of the condenser. Do not use knives, scrap
ers or other sharp objects that could damage the con
denser. When cleaning the condenser, use a clean cloth
saturated with transformer oil.
It is recommended that condenser bushings which have
been removed for shipment have the power factor and
capacitance measured before they are installed in the
transformer to find if internal shipping damage has oc
curred. This may avoid expensive disassembly from the
transformer, and later questions of bushing quality when
power factor tests are made on the transformer.
Important:
It should be noted that the normal inherent
power factor of these bushings is so low that the correct
values of the bushing power factor may be greatly dis
torted if either of the porcelain surfaces are dirty or wet,
if tests were made with the bushing near wet or grounded
surfaces, or if external parts are connected to the bush
ings.
TESTING CLIP
POWER FACTOR
T EST TERMINAL
"A" - Cap Removed for Power Factor Test
CONNECTOR
NYLON WASHER
GROUND WASHER
BUSHING FLANGE
BUSHING BOSS
FLAT WASHER
�NUT
"B"
-
Typical Cover Mount Assembly
CONNECTOR
NYLON WASHER
BUSHING FLANGE
BUSHING BOSS
(TAPPED)
"C'' - Typical Wall Mount Assembly in Throat
Fig. 13
Power Factor Test Device of Type RCP Bushings
Transformer bushing bosses are flat with a recess to re
tain the gasket and limit its compression. The side of the
gasket in the recess should be covered with gasket cement