Improvements to PD measurements for factory and site acceptance tests of power transformers

The Technical Brochure of Joint Working Group JWG A2/D1.51 deals with possible improvements to partial discharge (PD) measurements for factory acceptance test and site acceptance tests of power transformers. Main proposed improvement is the calibration procedure for UHF measurements to achieve comparable measurement results for a proposed frequency range while using different sensors, measuring devices, cables and amplifiers.