Investigation of Time Evolution of Length of Break Arcs Occurring in a 48VDC/50-300A Resistive Circuit


IEICE TRANSACTIONS on Electronics   Vol.E102-C   No.5   pp.424-427
Publication Date: 2019/05/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.2018ECS6025
Type of Manuscript: BRIEF PAPER
Category: Electromechanical Devices and Components
electrical contacts,  electromagnetic relay,  high-speed camera,  arc discharge,  

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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.