NDLI: The Effect of contact material composition of AgWC and Axial Magnetic Field intensity on interrupting capability and chopping current

Content Provider	IEEE Xplore Digital Library
Author	Ochi, S. Miyamoto, S. Koga, H. Kan, N. Harada, T. Ito, T. Koyama, K. Yamade, S.
Copyright Year	2006
Description	Author affiliation: Power Distribution Syst. Center, Mistubishi Electr. Corp., Marugame (Ochi, S.; Miyamoto, S.; Koga, H.; Kan, N.; Harada, T.)
Abstract	Silver tungsten-carbide (AgWC) has been used for contact materials of low surge type vacuum interrupter because of their properties such as low chopping current and low erosion. However the interrupting capability of AgWC is relatively less than CuCr. Generally, in order to increase the interrupting capability, axial magnetic field (AMF) is applied for large rated currents. On the other hand, it is known that the contact materials greatly affect the interrupting capability and chopping current. In this paper, in order to increase the interrupting capability of low surge type vacuum interrupters, the effect of the intensity of AMF and composition of AgWC under AMF on the interrupting capability were investigated. The contents of Ag and WC were varied and cobalt (Co) was added as a third element. Also the chopping currents were investigated. As a result, it was found that an increase of Co and a decrease of Ag content tended to increase the interrupting capability
Starting Page	285
Ending Page	288
File Size	4317573
Page Count	4
File Format	PDF
ISBN	1424401917
ISSN	10932941
DOI	10.1109/DEIV.2006.357287
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-25
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic materials Composite materials Interrupters Surge protection Surges Circuits Current measurement Magnetic fields Coils Conductors
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Software

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