Cable fault detection using a high voltage alternating polarity

Details Cable fault detection using a high voltage alternating polarity Cable fault detection using a high voltage alternating polarity

1993-12-30

1995-09-05

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324544, G01R 3108

Patent

active

054481767

ABSTRACT:
Test apparatus for a high voltage cable installation includes a high AC voltage source having the frequency range intended to be carried by the cable installation and a high DC voltage source. A switch alternately passes positive and negative polarities of the DC voltage, and the AC voltage source and the alternating polarity DC voltage output from the switch are coupled while isolating the voltage sources from each other. The resulting alternating polarity DC-biased AC voltage is injected into the cable installation to produce indications of incipient faults.

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