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mohsinhamid
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Join Date: May 2011
Posts: 91

DC Voltage for Hi-pot Test in Cables

03/25/2012 10:19 AM

pls some one tell me why we are applying DC voltage for high-voltage test in cables and AC voltage in busbar's...???
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visaseller
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Join Date: Dec 2009
Location: Kota Kinabalu, Malaysia
Posts: 39
#1

Re: why applying DC for hi-pot test in cables

03/25/2012 10:34 AM

To test low insulation
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redfred
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Engineering Fields - Electrical Engineering - Been there, done that. Engineering Fields - Control Engineering - New Member

Join Date: Dec 2008
Location: Long Island NY
Posts: 15600
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#2

Re: why applying DC for hi-pot test in cables

03/25/2012 10:53 AM

Because wire can be coiled in any shape. So the AC impedance of wire is technically not known. A bus bar is rigid and cannot be any other shape. So it can be tested using the waveform it will carry.

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