Power cables testing

[Melco001]

I have a 5 kV & 15KV new power cable sets to porform HiPot testing and may question is if 2(nominal voltage) + 1 is enough for insulation test on each cable.

Thank you for any support about that.

 

[Zogzog]

MV Cable testing is a specialized feild, if you dont know I highly recommend you hire a certified testing company. DC hipot can be a destructive test on MV cables, you want to do a AC VLF test or better yet a Tan Delta or PD test for initial baseline data for future condition assesment.

 

[petamm]

Zogzog is almost right, I would add sheath test for sure.
We are talking about completly NEW cables - Tan delta is not predicative in this case. We can expect strict cable manufacturer test in the factory, if the sheath test is ok we can expect good insulation and only mounting faults (joints, terminations)possible. Then the best is PD testing. For those who rely on withstand testing is AC or VLF test suitable too - but ONLY as an additional test to PD+sheath testing!Remember this kind of test can be destructive, probably will give you no result if done after successful PD+sheath test. The situation is slightly different with in operation or very old cables.

 

[rbulsara]

Look up NETA-ATS (Acceptance Test Specifications).

 

[Zogzog]

We are talking about completly NEW cables - Tan delta is not predicative in this case.

Agreed, but you can establish some good baseline data for future assesment.

For PD testing, these guys are very good, Don is well known in North America as a PD guru.

http://www.NoOutageElectricalTesting.com