5
URD CABLE DC LEAKAGE TESTER “Hi-Potting”
WARNING
– see “Meter Set-Up & Testing”, page 4.
Testing De-Energized URD cable
1.
Attach Meter to appropriate length live line tools for the voltage being
worked.
2.
Attach a bushing adapter to the end of the meter probe.
3.
Attach alligator clip to any ground, being sure to observe all safety
methods while doing so.
4.
Isolate both ends of the cable to be tested, use a feed-through bushing
on the near end.
5.
Approach the other side of the feedthrough bushing slowly with the
meter. An audible sound will indicate voltage is still on the line. If
voltage is present, remove the tool and follow appropriate procedures
to isolate the cable to be tested.
6.
If no horn sounds, you can push the meter all the way onto the
feedthrough bushing.
7.
Flip the red safety cover up and then the power switch up to activate
the high voltage test.
8.
A good cable may show a rise as far as the 100% mark but will then go
back down to near 0%.
9.
A bad cable will either show a steady high percentage on the scale or
the meter will continuously bounce up and down.
10.
After completion of the test, flip the red safety switch down, there may
be a horn sound momentarily as the unit is discharging the DC voltage
off the cable.
11.
Remove all equipment and return the tested cable to its normal
configuration.
NOTE 1: The section of cable under test must be isolated on both ends and
cannot be connected to/or through equipment or lighting arrestors.
NOTE 2: The maximum reading during the hi-potting test is 100% which
represents a “bolted” fault. Readings near zero represent a good cable with
little or no cable leakage. Readings in between near zero and 100% could be
high leakage or bad cable.
