Partial discharge is best described as a failure of part of an insulation system to withstand the electrical field applied to it. This can be a result of poor design, poor workmanship, defective materials, contamination, or aging. The result of this failure is a high-frequency, unipolar discharge and accompanying current that flows through and on the insulation from the conductor to ground. This current pulse is low energy due to its short (microsecond) duration, but it can negatively affect the insulation and eventually cause catastrophic failure. Thus it is very crucial to perform a partial discharge measurement and localization test of the cable and as the name of the category says this test is conducted when the cable is up and running.
- Partial Discharge Measurement And Localization