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#20957 - 01/24/03 09:52 PM HyPotting  
Gwz  Offline
Member
Joined: Apr 2002
Posts: 197
What are some of the typical HyPot voltages and time for 1/C 5KV and 15KV cables with shielding ?

Is their a 'Rule of Thumb '?


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#20958 - 01/24/03 11:52 PM Re: HyPotting  
gramps  Offline
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Joined: Aug 2002
Posts: 112
ohio
2 times the rated voltage times 75% for 1 minute....record the reading....take another reading for 10 minutes...record that reading.

divide the first reading into the second reading....EASA recommends the answer should be 2.0 or higher.....but, 1.5 is prolly o.k.


#20959 - 01/25/03 02:45 AM Re: HyPotting  
Bjarney  Offline
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Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
There are different levels for new versus maintenance testing, and 100% or 133% insulation.

One chart is http://www.kerite.com/catalog/catalogfiles/DC_field_testing_power.htm

Be Careful. You’re charging up fairly big capacitor(s) in the process. The test-set instruction manual is a good reference.




[This message has been edited by Bjarney (edited 01-25-2003).]



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