Motion of Break Arcs Occurring between Electrical Contacts with Arc Runners Made of Copper or Silver

Haruki MIYAGAWA  Junya SEKIKAWA  

Publication
C - Abstracts of IEICE TRANSACTIONS on Electronics (Japanese Edition)   Vol.J100-C   No.2   pp.98-106
Publication Date: 2017/02/01
Online ISSN: 1881-0217
DOI: 
Type of Manuscript: PAPER
Category: 
Keyword: 
electrical contacts,  high-speed camera,  arc spots,  DC high voltage circuit,  

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Summary: 
To investigate the transfer characteristics of arc spots from surfaces of electrical contacts to other structures, arc runners are fixed on silver electrical contacts. The silver contacts are separated at constant speed and break arcs are generated. Circuit current when contacts are closed is 10A. Supply voltage is changed from 200V to 450V. Materials of the arc runners are copper or silver. The following results are shown. In either cases of copper or silver runners, cathode spots do not run on the runner. In cases of copper runners, when the supply voltage E is over 350V, anode spots stay on the runner. In cases of silver runners, anode spots run on the runners and break arcs are extinguished quickly without relation to supply voltage. Arc duration for break arcs with copper runners is longer than that with silver runners.