High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Magnetic blowout
Patent
1996-08-06
1998-11-17
Coggins, Wynn Wood
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Magnetic blowout
218 22, H01H 3318
Patent
active
058379533
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.
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Tokuyama, Shunji, et al., Large DC Current Breaking by Commutating Method Using Negative Resistance Characteristic of Gas Arc, Academy of Electric Engineering, Switch Protective Device Research Group, pp. 41-49. (English abstract provided).
Yoshio Yosida, et al., A Study of DC-Current Interruption for GCB with Parallel Capacitor and Reactor, Conference of the Power and Energy Department of the Electric Society (Japan, 1994), No. 621, pp. 824 and 825 (with an English abstract of the relevent portion).
Arai Kazuhiko
Hamano Suenobu
Hashimoto Takateru
Hatano Masayuki
Ito Hiroki
Coggins Wynn Wood
Electric Power Development Co. Ltd.
Hayes Michael J.
Mitsubishi Denki & Kabushiki Kaisha
Shikoku Electric Power Co., Inc.
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