Cover-Mounted Above 25 Kv Class - Westinghouse PS-1002 Instruction Book

terminal cap centered on the porcelain. To obtain proper
compression of the gasket the terminal cap is turned 1 /2
turn with a wrench after tightening as much as possible
by hand.
For fu r th e r d e t ail s obtain Instruction Leaflet
48 -06 1 -6 3.
For current ratings above 600 amperes, stud-type
bottom-connected, Type "RJ" bushings are used. (See
Fig. 1 0).
Fig. 10
Type RJ Bottom-Connected Bushing
The con ductor through the center of the bushing has
threaded ends defined in the NEMA Standards.
cap nut soldered to the conductor, and a retained nitrile
gasket between the cap nut and porcelain provide the seal
at the top end. The space between the porcelain and con­
ductor is filled with oil, except for a sufficient gas space
to provide for oil expansion . This oil is retaine d by gas­
ket seals at the porcelain support at the lower end.
48 -06 1 -64.
place on the transformer. The bushing is mounted on a
boss which is welded to the transformer tank cover.
recesse d groove in the boss contains a gasket to seal be­
tween the bushing flange and the boss.
cracking the porcelain or damaging its surface .
5.13.2
SOLDERED
Outdoor Condenser Bushings are used for voltage classes
THREADED JOINT
of 34 .5
T ERMINAL CAP
"RCP", "OS", and "0" are normally supplied. Each bush­
ing consists principally of a cylindrical condenser assem­
bly, protected on its outer end with a porcelain weather
casing made by the wet process. The space between the
condenser and the weather casing is filled with a high di­
electric strength compound or "WEMCO C" transformer
oil depending on the bushing type. Each bushing is
equipped with a power factor test terminal which per­
mits making power factor tests of the bushing while it is
installed by the "Ungrounded Specimen Method" without
disconnecting the bushing from the transformer winding.
Refer to Westinghouse Bushing Manual, T.D. 33-360, for
SILICONE RUBBER
GASKET instructions on how to make bushing test and how to
analyze the test results. During normal operation the
power factor test terminal must be grounded.
GASKET
THE POWER FACTOR TEST TERMINAL MUST BE
SUPPORT WASHER
GROUNDED DURING NORMAL OPERATION. IF THE
POWER FACTOR TERMINAL IS LEFT UNGROUNDED
"O"RING GASKET DURING NORMAL OPERATION, A HAZARDOUS
VOLTAGE WILL BE IMPRESSED ON THE POWER
SPRING WASHER
FACTOR TEST TERMINAL. F AlLURE TO GROUND
CONTACT NUT
THE POWER FACTOR TERMINAL COULD CAUSE
DANGER TO LIFE.
power factor terminal (or voltage tap receptacle) on the
Type RCP and Type 0 bushings.
A metal
terminal of the Type RCP bushing. Note that flange in­
stallation bolts may be installed with the bolt head up or
in the down position
ground washer position. This bolt is a standard flange
bolt that has been provided with a 1 /4-20 threaded hole
F o r fu rth e r d e t a i l s obtain Instruction Leaflet
Type "RJ" bushings are usually shipped mounted in
Care must be taken in handling the bushing to avoid
Cover-Mounted Abol'e
KV and above. Westinghouse bushing Types
Figures 1 1 and 1 2 show the relative location of the
Figure 1 3 is a detail drawing of the power factor test
except
1 3
25 KV Class
for the bolt in the bushing
A