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7. Typical Uses
˙
Identify and check live cables.
˙
Check and detect live high voltage cables (using
extension hot stick).
˙
Find fault in flexible cables.
˙
Check earth equipment.
˙
Trace live wires.
˙
Check high frequency radiation.
˙
Detect residual or induced voltages.
8. Broken Wires In Cables
Faults in damaged flexible cables are found by applying
low voltage to each conductor. Earthing the remainder
(the wires that do not need to be traced. Do not earth
the live wire, so that they can be detected by the Non-
contact high voltage detector.) and moving the tester
along the cable until the change in condition is obtained.
(Flexible cables, as used in mining
and building industries, are readily repairable when the
break in the cable is located).
9. High Voltage Testing
The rotary switch (attenuator) is used to identify and
differentiate various HV live cables.
The Non-contact
high voltage detector must be used in conjunction
with a long and insulating rod or hot stick when
measuring high voltage (kV).
The Non-contact high voltage detector should never be
in contact with live conductors. Live conductors emit
a radiated field that can be detected by the detector's
sensor.
