Insulation Resistance

The insulation resistance test is a direct current evaluation test of the insulation and gives a reliable indication of the presence of moisture, contamination, or breakdown in the insulation. This test also establishes a benchmark for future comparative tests.

Partial Discharge

PD defined is a localized dielectric breakdown within a small portion of an electrical insulation system under stress of high voltage, which does not bridge the space between two conductors.  Partial Discharge is not yet a complete failure of the insulation, however, it is an indication of what is to come.  PD testing determines the presence, and locates PD activity within a system.


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