Title:
PHASE CONTROL SWITCHGEAR
Document Type and Number:
WIPO Patent Application WO/2012/014282
Kind Code:
A1
Abstract:
Disclosed is a phase control switchgear wherein it is possible to inhibit the generation of transient voltages and currents when the phase advancing load circuit is being closed. Specifically disclosed is a phase control switchgear provided with: a residual voltage polarity estimating unit (81a) which determines that the last detected zero point of the voltage on the load side of each phase is the zero point of the voltage on the load side of each phase immediately before each phase was blocked when a subsequent zero point of the voltage on the load side of each phase cannot be detected within a predetermined time period after the previous zero point of the voltage on the load side of each phase was detected and which estimates that the polarity of the time differential value of the voltage on the load side in the zero point of the voltage on the load side of each phase immediately before each phase was blocked is the polarity of the residual voltage of each phase after a breaker (50) is opened; and a closing phase control unit (81b) which controls the breaker (50) such that the breaker (50) is closed at the zero point of the voltage on the load side of each phase at which the polarity of the residual voltage of each phase is inverted to a reverse polarity after the blocker (50) is opened.
Inventors:
TOKOYODA, Sho (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
常世田 翔 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
KINOSHITA, Sadayuki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
木下 定之 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
MORI, Tomohito (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
常世田 翔 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
KINOSHITA, Sadayuki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
木下 定之 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
MORI, Tomohito (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2010/062609
Publication Date:
February 02, 2012
Filing Date:
July 27, 2010
Export Citation:
Assignee:
Mitsubishi Electric Corporation (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
TOKOYODA, Sho (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
常世田 翔 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
KINOSHITA, Sadayuki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
木下 定之 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
TOKOYODA, Sho (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
常世田 翔 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
KINOSHITA, Sadayuki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
木下 定之 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
International Classes:
H01H33/59; H01H9/56
Attorney, Agent or Firm:
SAKAI, Hiroaki (Sakai International Patent Office, Kasumigaseki Building 2-5, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 20, 〒1006020, JP)
Claims:
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