Types VW and VWV Maintenance Instructions
8
D. Turn the closing tool one-quarter turn clockwise to close
the main contacts.
CAUTION
Never use the KA90R closing tool to close an energized
recloser. Forcing the tool beyond the mechanism stop may
shear the pin on the closing shaft.
CAUTION
The mechanism may be damaged if it is "quick-tripped" with
the yellow operating handle while out of oil.
2. To open the recloser.
A. Pull down the yellow operating handle to trip open the
recloser.
NOTE: If the mechanism is partially untanked, and properly sup-
ported, the recloser can be tripped open by pulling down on the
series trip solenoid linkage.
MECHANISM OUT OF OIL
To operate the mechanism out of oil, proceed as follows:
1. To close the recloser.
A. If the mechanism is still mounted in the head use the pro-
cedure for a tanked recloser above (Mechanism in Oil).
B. If the mechanism is removed from the head turn the trip
reset shaft (Figure 10) with a pair of needlenose pliers to
reset the mechanism, then turn the closing shaft clock-
wise with the closing tool to close the main contacts.
Figure 10.
Resetting trip reset.
84616KMA
TRIP
RESET
SHAFT
2. To open the recloser contacts while the mechanism is out of
oil, proceed as follows:
A. Using the T-handle closing tool turn the closing shaft clock-
wise and hold against the stop.
B. Release the trip lever (Figure 11 ) by moving it to the
right.
C. Then slowly allow the closing tool to rotate counterclock-
wise to open the main contacts.
NOTE: This procedure requires two people; one to oper-
ate the closing tool, the other to operate the trip lever.
Figure 11.
Trip lever releases mechanism when opening recloser out of
oil.
86793KMA
TRIP
LEVER
Insulation Level Withstand Tests
High-potential withstand tests provide information on the dielec-
tric condition of the recloser and the vacuum integrity of the
interrupters. Testing is performed at 75% of the rated low fre-
quency withstand voltage (37.5 kv for the VW, 45 kv for the
VWV27 and 52.5 kv for the VWV38).
At voltages up to 45 kv the radiation emitted by the vacuum
interrupter is negligble. However at higher test voltages radi-
ation injurious to personnel may be emitted. See Radiation
Warning Service Information Bulletin S280-90-1 for further
details.
RADIATION
WARNING
TEST 1: Proceed as follows:
1. Manually close main contacts of recloser (see page 6 for pro-
cedure).
2. Ground recloser tank and head.
3. Connect all three source-side bushings (1, 3, 5) together.
4. Apply proper test voltage to source-side bushings.
5. The recloser should withstand the test voltage for 60 seconds.
TEST 2: Proceed as follows:
1. Manually close main contacts of the recloser (see page 6 for
procedure).
2. Ground recloser tank and head.
3. Ground Phase A (bushing 2) and Phase C (bushing 6).
4. Apply proper test voltage to Phase B (bushing 3).
5. The recloser should withstand the test voltage for 60 seconds.
TEST 3: Proceed as follows:
1. Open main contacts of recloser (see page 6 for procedure).
2. Ground recloser tank and head.
3. Connect and ground all three load-side bushings (2, 4, 6).
4. Connect all three source-side bushings (1, 3, 5).
5. Apply proper test voltage to source-side bushings.
6. The recloser should withstand the test voltage for 60 seconds.
7. Reverse the connections: ground source-side bushings (1, 3,
5); apply test voltage to load-side bushings (2, 4, 6) for 60 sec-
onds.
8. The recloser should withstand the test voltage for 60 seconds.
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