Retanking the Regulator
Retank the regulator as follows. Refer to Figure 21.
.
Be sure position indicator shows present position of
the tap-changer.
If not, remove indicator cable in junction box from posi-
tion indicator shaft after loosening set screw. Rotate
indicator shaft until proper position is reached, then
tighten set screw. Verify coordination of position indi-
cator with tap-changer in the neutral position (control
neutral light on). Refer to the
TROUBLESHOOTING
section of this manual for position indicator replace-
ment.
2 .
Check gasket seat surfaces on cover and tank, and
wipe clean. Wipe gasket and position it on tank lip.
3 .
Loosen horizontal, side channel bolts to ensure proper
seating of regulator in tank and proper cover seal.
4 .
Raise cover assembly and attached components over
tank. Make certain of proper orientation.
5 .
Lower unit, rotating channels counter-clockwise into
tank guides.
6 .
Seat unit in tank. Tighten cover clamps or bolts.
NOTE:
On round tanks, tap cover with a rubber hammer
around the edge to assist in providing a good seal
while tightening the cover band.
7 .
Check and retighten the horizontal, side-channel bolts
through the hand hole: torque to 68 N•m (50 ft•lbs).
8 .
Properly reseal hand-hole cover, being careful not to
damage cover or insulation on the hand-hole cover.
.
Connect control cable to connector at the bottom of
the junction box.
A .
If the unit is out of fluid more than four hours, it
must be rebaked at 66 ˚C (150 ˚F). A unit can be
rebaked a maximum of two times over its life.
B .
Within four hours after bake, the unit should be
retanked and filled with fluid.
C .
Retighten all hardware as needed.
It is recommended that a vacuum be pulled on the unit for
at least one hour (2 mm of vacuum or better) after the unit
is completely refilled with fluid. If vacuum processing is not
available, allow the entire internal assembly to soak in fluid
for at least five days before energizing.
SPARE PARTS
Ordering Information
When ordering replacement parts or field-installation acces-
sories for your Cooper Power Systems VR-32 step-voltage
regulator, provide the following information:
• Regulator serial number (found on nameplate)
• Regulator catalog number (found on nameplate)
• Part number
• Description of each part
• Quantity of each part required
Refer to Figure 22 for part identification of high-voltage
bushings.
Refer to Figure 23 for QD-8 Quik-Drive tap-changer parts.
Refer to Figure 24 for QD-5 Quik-Drive tap-changer parts.
Refer to Figure 25 for QD-3 Quik-Drive tap-changer parts.
25
S225-10-30
!
SAFETY
FOR LIFE
Figure 22 .
High-voltage bushing (S, L, and SL) .
TERMINAL CAP
TERMINAL CAP GASKET
COMPLETE BUSHING
ASSEMBLY W/HARDWARE
BUSHING (PORCELAIN)
BOLT
CLAMP RING
TANK COVER
ROD ASSEMBLY
CONICAL SPRING WASHER
WASHER
HEX JAM NUT
BUSHING GASKET
SPRING
