2007 Volume 127 Issue 4 Pages 596-597
The overvoltage waveforms on a medium-voltage (MV) line generated by lightning have a steep front and a short tail due to behavior of protection devices. To discuss the occurrence of sparkover on a MV line, it is necessary to estimate the insulation characteristics of the distribution instruments by using such waveforms. Therefore, it is of practical importance to develop an equivalent circuit of an impulse generator, applicable to the case of generation of such waveforms. In this letter, the authors verify the reproducibility of a steep and short-tailed lightning impulse voltage waveform by the detailed equivalent circuit.