Arc Duration and Dwell Time of Break Arcs Magnetically Blown-out in Nitrogen or Air in a 450VDC/10A Resistive Circuit

Akinori ISHIHARA  Junya SEKIKAWA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.9   pp.699-702
Publication Date: 2018/09/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.699
Type of Manuscript: BRIEF PAPER
Category: 
Keyword: 
electrical contact,  electromagnetic relay,  permanent magnet,  high speed camera,  

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Summary: 
Electrical contacts are separated at constant speed and break arcs are generated in nitrogen or air in a 200V-450VDC/10A resistive circuit. The break arcs are extinguished by magnetic blow-out. Arc duration for the silver and copper contact pairs is investigated for each supply voltage. Following results are shown. The arc duration for Cu contacts in nitrogen is the shortest. For Cu contacts, the arc dwell time in air was considerably longer than that of nitrogen. For Ag contacts, the arc duration in nitrogen was almost the same as that in air.