Acceptable Test Values for new 2KV cable.

[EPSarizona]

When testing 2kv Cable (unshielded) that will be used in a 900vdc system, what are the acceptable results for a megger test at 2kvdc? The design engineer calls for a PI as well. One run has a PI of less than 1 but has a ten minute read of 600 Megohms.

 

[jbartos]

Suggestion: Visit

http://www.gmc-instruments.com/resources/p1/m_5000dpi/db_gb.pdf

for PI

http://www.ecmweb.com/ar/electric_understanding_insulation_resistance/

etc. for more info

 

[coingy]

EP,

Our company standards would be a 1kV megger test with a minimum IR of 100 Mohms. It is not a normal test for a PI on a cable and I am not sure why this has been specified. A PI minimum of 2 is for equipment.

Cheers, Coingy

 

[RajT]

I would assume that the 900Vdc system is ungrounded so a value of 600mohm would be quite acceptable.