Hubbell VERSA-TECH LT - Figure 7-1 Recloser Attached to High Potential Test Set

PSP8620311
Rev. E
42
! CAUTION
! WARNING
7 — Testing
High Potential Withstand
Test
Applying AC 50/60 Hz voltage across the
open contacts of the recloser will test the
dielectric integrity of the vacuum interrupter.
The AC voltage should be applied at 40kV
which is 2/3 of the rated maximum withstand
for 60 seconds.
1. Open the recloser.
2. Connect the test voltage across the
recloser open contacts by attaching one
end of the test transformer to each of the
2-hole NEMA input pads (see Figure
7-1).
3. Ensure both ends have adequate
electrical clearance from each other and
from any ground.
4. Verify the recloser can hold the voltage
across the open contacts for 60 seconds.
During high potential withstand tests, self
extinguishing momentary breakdowns can
occur which do not indicate significant loss
of vacuum.
Hazardous voltages are present during testing. Severe
personal injury or death can occur from contact with
recloser or high voltage transformer during tests.
Recloser and high voltage transformer must be in a grounded test cage
or similar protective barrier to prevent accidental contact with energized
equipment.
X-rays may be emitted from open vacuum interrupter contacts dur-
ing high potential withstand tests.
X-rays may be hazardous to your health.
Maintain a minimum of 3 meters distance from recloser during this high potential with-
stand test.
X-rays emitted by testing at voltages up to 40kV are negligible at the minimum 3 meters
distance, but higher test voltages may result in hazardous x-ray emission.
Figure 7-1 Recloser attached to high potential test set
AC High Potential
Test Set