Testing & Monitoring of Partial Discharges allow for the “Online or Offline Detection of Air Voids Inside Solid Insulation and Probable Insulation Failure” in MV/HV/EHV termination, cables, switchgear, transformers, busbars, motors, and generators caused by ionisation of the air, resulting in arcing, tracking, and corona.

To check the integrity of the insulation for offline testing, it is typically done in conjunction with other pertinent tests like Insulation Resistance, Tangent Delta, etc.