The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 1998
Filed:
Aug. 06, 1996
Hiroki Ito, Tokyo, JP;
Takashi Moriyama, Tokyo, JP;
Kenji Kamei, Tokyo, JP;
Minoru Kimura, Tokyo, JP;
Suenobu Hamano, Tokyo, JP;
Takashi Yonezawa, Tokyo, JP;
Etsuo Nitta, Tokyo, JP;
Kazuhiko Arai, Tokyo, JP;
Hiroyuki Sasao, Tokyo, JP;
Naoaki Takeji, Osaka, JP;
Takateru Hashimoto, Kagawa-ken, JP;
Masayuki Hatano, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Chiyoda-ku, JP;
The Kansai Electric Power Co., Inc., Kita-ku, JP;
Shikoku Electric Power Co., Inc., Takamatsu, JP;
Electric Power Development Co., Ltd., Chuo-ku, JP;
Abstract
A DC circuit breaking device is provided for interrupting the transmission of direct currents to an electric power system by making external changes to an arc generated upon contacting or separation of contacts 11 and 12 in order to rapidly extend and vibrate arc currents. In a self-excited commuting DC circuit breaking device, coils 41 and 42 opposed to a fixed and a movable contact 11 and 12, respectively, are disposed around the outer circumferences of the contacts 11 and 12, and currents flowing through a commutation circuit or the contacts 11 and 12 are allowed to flow through the opposed coils 41 and 42 so as to apply magnetic fields to the neighborhood of an arc. This constitution provides the DC circuit breaking device with high performance that it can rapidly extend and vibrate arc currents to thereby interrupt direct currents.