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Structure of main air discharging switch and a crowbar TVS (triggered vacuumswitch) are designed and their triggering characteristics are investigated. The experimental resultsshowed that for TVS the operating voltage range is from 1.3 kV to 120 kV, its maximum delaytime is 400 ns and its jitter is±10 ns. Based on these results the crowbar 10/350 μs (i.e., witha front time of 10 μs and a duration of 350 μs) pulse current circuit and its controlling circuitare designed. With a 10 μF stored capacitor C and a 6 μF waveform forming induction, a pulsecurrent is generated with a maximum of 100 kA, front time of 10 ns and duration of 350 μs. Thispulse waveform can be used for testing SPD (surge protective devices).
Structure of main air discharging switch and a crowbar TVS (triggered vacuumswitch) are designed and their triggering characteristics are investigated. The experimental resultsshowed that for TVS the operating voltage range is from 1.3 kV to 120 kV, its maximum delaytime is 400 ns and its jitter is ± 10 ns. Based on these results of the crowbar 10/350 μs (ie, witha front time of 10 μs and a duration of 350 μs) pulse current circuit and its controlling circuit design. With a 10 μF stored capacitor C and a 6 μF waveform forming induction, a pulse current is generated with a maximum of 100 kA, front time of 10 ns and duration of 350 μs. This pulse waveform can be used for testing SPD (surge protective devices).