Sounds like you did not eliminate the problem but made it so you did not detect it anymore.
Where did that current come from (or go to) to make the GFI activate?
I would expect that a good Hipot tester has a well isolated and shielded line input to secondary circuitry, so the tester does not contribute to measured leakage current.

Ahne.


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Blair Hogg
Sent: 08 June, 2013 04:51
To: [log in to unmask]
Subject: Re: [TN] Hipot Testing

Does the Hipot tester give a GFI fault? If so, I think what that means is that some of the current flowing out from the test lead goes somewhere else, and doesn't come back through the return lead. The device you are testing needs to be isolated from earth / building / system ground during the test. I had a similar problem on an automated tester that performed a hipot test, current would leak through system ground and a GFI fault on the tester would trip. Once I isolated the product under test from system ground during hipot testing it went away.

Blair

On Fri, 7 Jun 2013 11:16:40 -0400, Michael Strong <[log in to unmask]> wrote:

>Wondering if I can pick the brain of somebody out there.  When 
>performing Dielectric strength testing most of my failures are the 
>result of a GFI.  I can turn this feature off on my instrument and was 
>wondering if most people who do this testing do the same.  I know this 
>is a safety feature but I'm trying to find a more standardized way of 
>doing this test.  What are the likely consequences of turning this 
>feature off?  Any advice would be appreciated.
>
>
>
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