Tail-Chopped Lightning Impulses Time Parameters Estimated According to Standard IEC 60060-1:2010

The International Electrotechnical Commission (IEC) issued in 2010 a revision of the family of standards IEC 60060, describing, among other requirements, how to calculate the various amplitude and time parameters used to evaluate high-voltage impulse waveforms. However, the standards are not clear in some aspects, especially when describing tail-chopped lightning impulses. This paper aims at describing in detail how to properly estimate the time parameters of such impulses.