Regular Section
Investigation of Time Evolution of Length of Break Arcs Occurring in a 48VDC/50-300A Resistive Circuit
2019 年 E102.C 巻 5 号 p. 424-427
詳細
2019 年 E102.C 巻 5 号 p. 424-427
Break arcs are generated in a 48VDC resistive circuit. Circuit current I0 when electrical contacts are closed is changed from 50A to 300A. The break arcs are observed by a high-speed camera with appropriate settings of exposure from horizontal direction. Length of the break arcs L is measured from images of the break arcs. Time evolutions of the length L and gap voltage Vg are investigated. The following results are obtained. By appropriate settings of the high-speed camera, the time evolution of the length L is obtained from just after ignition to before arc extinction. Tendency of increase of the length L is similar to that of increase of the voltage Vg for each current I0.
