10/350μs Crowbar impulse current test system

This article combines theoretical calculation and ATP-EMTP simulation to design the 10/350μs Crowbar impulse current circuit. Parameters that affect peak value and tail time of the 10/350μs current are obtained. Methods to determine the best main circuit parameters are also concerned. with the increase of the main capacitance, the current peak value and the front time also increases; with the increase of the forming inductance, the wave tail time and front time also increase, while the peak value decreases; with the increase of the equivalent resistance of the test sample, the wave tail time decreases. According to the above technical design, the 10/350 μs Crowbar impulse current system is produced, with the main capacitance being 24 μF and forming inductance being 16 μH. This system can generate the standard 10/350 μs lightning current waveform with a maximum current value of 100 kA.