Lightning breakdown voltage of dielectric oil ::discussion on measuring setups and standards

Nowadays, more and more studies present the results obtained while testing the lightning impulse breakdown behavior of newly developed, innovative dielectric oils. As showed for industrial frequencies, clear standardized test conditions are mandatory to allow the interpretation of test results without uncertainties. This paper addresses the characteristics of the measuring cell suggested by ASTM and IEC standards and their influence on performing impulse breakdown measurements. As an addition to the results recently published by other research teams, this work intends to discuss several aspects that could be further investigated in a working group. The joint research could provide the ASTM and the IEC standards organizations with a broader view of lightning impulse breakdown (LI) and withstand data that can benefit and improve their regulation