hipot testing

[mkgrady]

On the other hand, just because it passes a DC hipot test does not necessarily mean the cable it good either. A DC hipot will only reveal gross installation errors.

So what would you do if a cable passed a hipot test? Wouldn't you assume it is usable? Wouldn't you just leave it in place and use it?

 

[zog]

So what would you do if a cable passed a hipot test? Wouldn't you assume it is usable? Wouldn't you just leave it in place and use it?

Per industry standards we no longer use DC hipots for cable testing. Because the effectiveness of DC hipot testing is unreliable and can be a destructive test. We either do VLF or TD tests.

IEEE std 400 States "even massive insulation defects cannot be detected with DC at the recommended voltage levels"

 

[vegasbaby]

On the other hand, just because it passes a DC hipot test does not necessarily mean the cable it good either. A DC hipot will only reveal gross installation errors.

But is it the test that should be used to test all 9000' of cable that was short out?

 

[zog]

But is it the test that should be used to test all 9000' of cable that was short out?

For what purpose? If you know it is "shorted" what is the point of the DC hipot? To damage the rest of the cable that is not already damaged? DC hipot tests are considered destructive for in service MV cables by IEEE, ANSI, ICEA,.........I feel like a broken record. Call a certified testing company.