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Paper Abstract and Keywords
Presentation 2025-07-18 13:05
Transition Characteristics of Arc Roots of Break Arcs from Electrical Contacts to a Same-Potential Electrode
Ryota Miyazaki, Junya Sekikawa (Shizuoka Univ.) EMD2025-1
Abstract (in Japanese) (See Japanese page) 
(in English) Break arcs were generated during the separation at constant speed of electrical contacts in a resistive DC circuit with a supply voltage of 300 V and a circuit current of 10 A when the contacts were contacted. A same-potential electrode, short-circuited to a fixed contact, was spatially separated. The break arcs were driven by magnetic blowing-out, causing arc spots to transition from the electrical contact to the same-potential electrode P. The polarity of electrode P was set as either cathode or anode, and its height z relative to the contact was varied at 5 mm, 7 mm, and 9 mm. The magnetic flux density B used for magnetic blowing-out was 30 mT. The voltage and current waveforms of the break arcs, as well as the transition characteristics of the break arcs observed by high-speed cameras, were investigated, yielding the following results. When the electrode P was connected to the cathode, the break arcs were lengthened avoiding the P, and the transition of the cathode spots from the contact to the electrode P became difficult. Under conditions where the P was close to the electrical contacts and the magnetic flux density of the transverse magnetic field was high, the cathode spots transitioned unstably to the P. When the P was connected to the anode, the anode spots transitioned stably, being attracted toward the P regardless of the distance from the contacts or the magnetic flux density.
Keyword (in Japanese) (See Japanese page) 
(in English) Break arc / Electrical contacts / High-speed camera / Arc spots / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 123, EMD2025-1, pp. 1-6, July 2025.
Paper # EMD2025-1 
Date of Issue 2025-07-11 (EMD) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EMD2025-1

Conference Information
Committee EMD EMCJ WPT  
Conference Date 2025-07-18 - 2025-07-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2025-07-EMD-EMCJ-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Transition Characteristics of Arc Roots of Break Arcs from Electrical Contacts to a Same-Potential Electrode 
Sub Title (in English)  
Keyword(1) Break arc  
Keyword(2) Electrical contacts  
Keyword(3) High-speed camera  
Keyword(4) Arc spots  
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1st Author's Name Ryota Miyazaki  
1st Author's Affiliation Shizuoka University (Shizuoka Univ.)
2nd Author's Name Junya Sekikawa  
2nd Author's Affiliation Shizuoka University (Shizuoka Univ.)
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Speaker Author-1 
Date Time 2025-07-18 13:05:00 
Presentation Time 25 minutes 
Registration for EMD 
Paper # EMD2025-1 
Volume (vol) vol.125 
Number (no) no.123 
Page pp.1-6 
#Pages 6 
Date of Issue 2025-07-11 (EMD) 

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