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Paper Abstract and Keywords
Presentation 2018-03-02 13:20
An experiment on reliability of Auxiliary Contacts in Electromagnetic Contactor
Sora Ishiwa, Kazuki Takahashi, Koichiro Sawa, Kiyoshi Yoshida (NIT) EMD2017-58 Link to ES Tech. Rep. Archives: EMD2017-58
Abstract (in Japanese) (See Japanese page) 
(in English) We have carried out an open and close operation experiments to evaluate the contact reliability of the auxiliary contacts of the electromagnetic contactor. The influence of the circuit conditions and the number of operations on the contact resistance Rc, the arc duration time ta, the molten metal bridge time tb and the arc energy Ea was experimented. The contact surface after the experiment was observed with a 3D laser microscope.
As a result, arc discharge occurred in the circuit including the inductance even at DC10V and 1A, and the contact shape was affected. Moreover, from the operation test of 1 million times under the small load condition (DC3V,3mA), it became clear that contact reliability is very high. Because the value of Rc was low and stable. From the surface observation, the transition of the material could not be confirmed.
Keyword (in Japanese) (See Japanese page) 
(in English) Electromagnetic contactor / Electrical contact / Auxiliary contact / Contact resistance / Arc discharge / Contact reliability / Arc energy /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 467, EMD2017-58, pp. 5-8, March 2018.
Paper # EMD2017-58 
Date of Issue 2018-02-23 (EMD) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 EMD2017-58 Link to ES Tech. Rep. Archives: EMD2017-58

Conference Information
Committee EMD  
Conference Date 2018-03-02 - 2018-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Nippon Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2018-03-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An experiment on reliability of Auxiliary Contacts in Electromagnetic Contactor 
Sub Title (in English)  
Keyword(1) Electromagnetic contactor  
Keyword(2) Electrical contact  
Keyword(3) Auxiliary contact  
Keyword(4) Contact resistance  
Keyword(5) Arc discharge  
Keyword(6) Contact reliability  
Keyword(7) Arc energy  
1st Author's Name Sora Ishiwa  
1st Author's Affiliation Nippon Institute of technology (NIT)
2nd Author's Name Kazuki Takahashi  
2nd Author's Affiliation Nippon Institute of technology (NIT)
3rd Author's Name Koichiro Sawa  
3rd Author's Affiliation Nippon Institute of technology (NIT)
4th Author's Name Kiyoshi Yoshida  
4th Author's Affiliation Nippon Institute of technology (NIT)
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Speaker Author-1 
Date Time 2018-03-02 13:20:00 
Presentation Time 15 minutes 
Registration for EMD 
Paper # EMD2017-58 
Volume (vol) vol.117 
Number (no) no.467 
Page pp.5-8 
Date of Issue 2018-02-23 (EMD) 

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