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HyPotting #20957
01/24/03 08:52 PM
01/24/03 08:52 PM
G
Gwz  Offline OP
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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Re: HyPotting #20958
01/24/03 10:52 PM
01/24/03 10:52 PM
G
gramps  Offline
Member
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.

Re: HyPotting #20959
01/25/03 01:45 AM
01/25/03 01:45 AM
B
Bjarney  Offline
Moderator
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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