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Paper Abstract and Keywords
Presentation 2007-11-14 14:20
An experimental study of influences of contact opening speeds on arcing behaviors of silver contacts
Makoto Hasegawa (Chitose Inst. of Science and Tech.) EMD2007-79
Abstract (in Japanese) (See Japanese page) 
(in English) In order to study the influence of contact opening speeds on break arc behaviors, Ag contacts were operated to break inductive DC load currents from 0.1 A to 0.6 A at 14 V with contact opening speeds of 0.5 mm/s to 10 mm/s in a switching mechanism employing a stepping motor. Occurrence rates of break arcs and their average durations were determined at each current level under the respective contact opening speeds. From the results, irrespective of the opening speed values, the arc occurrence rate was almost 100% at 0.4 A. For all contact opening speeds tested, the conventional minimum arc current level can be considered, not as the lower limit for arc ignition, but rather as the threshold level for arc discharges of certain duration to occur at the rate of almost 100%. Moreover, in the current range from 0.2 to 0.4A, slight differences in the arc occurrence rates were seen with differences in the contact opening speeds. The average arc durations were around 50 μs at the conventional minimum arc current level of 0.4 A, and not influenced significantly by changes in the tested range of contact opening speeds, while arc extinction gaps became larger with increases in the opening speeds.
Keyword (in Japanese) (See Japanese page) 
(in English) arc discharge / minimum arc current / contact opening speed / extinction gap / Ag contacts / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 309, EMD2007-79, pp. 61-66, Nov. 2007.
Paper # EMD2007-79 
Date of Issue 2007-11-07 (EMD) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee EMD  
Conference Date 2007-11-14 - 2007-11-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Actcity Hamamatsu 
Topics (in Japanese) (See Japanese page) 
Topics (in English) International Session on Electro-Mechanical Devices 2007 
Paper Information
Registration To EMD 
Conference Code 2007-11-EMD 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An experimental study of influences of contact opening speeds on arcing behaviors of silver contacts 
Sub Title (in English)  
Keyword(1) arc discharge  
Keyword(2) minimum arc current  
Keyword(3) contact opening speed  
Keyword(4) extinction gap  
Keyword(5) Ag contacts  
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1st Author's Name Makoto Hasegawa  
1st Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Science and Tech.)
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Speaker Author-1 
Date Time 2007-11-14 14:20:00 
Presentation Time 20 minutes 
Registration for EMD 
Paper # EMD2007-79 
Volume (vol) vol.107 
Number (no) no.309 
Page pp.61-66 
#Pages 6 
Date of Issue 2007-11-07 (EMD) 

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