Discussion on tolerance of relative overshoot magnitude of lightning impulse voltage waveforms in impulse test of power transformers
This paper investigates the evaluation criteria for overshoot in lightning impulse voltage withstand tests of power transformers, focusing on the consistency between different editions of the IEC standard (IEC 60060-1:1989 and IEC 60060-1:2010/2025) and provides both theoretical and empirical analyses based on actual test data.