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DC testing

LIPA

April 2, 2012

LIPA Q: I have read a paper from the conference record of the 2008 IEEE International Symposium on Electrical Insulation (ISEI) by some folks at Powertech Labs …

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DC Testing to sectionalize faults – Warranty Impact

April 14, 2010

Q: We use a 10kV hipot DC to sectionalize URD faults. We actually use this on several sections at a time so it will go through good sections of cable until it reaches the bad section. We split the run of cables fed by a common fuse in half and hipot one way (could be 4 or 5 sections of cable) and if it is not found we hipot in the other direction. Do we have to wait 120 days after this and if so how do we track it?

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