大電流気中アークにおける消弧グリッド配置時の電圧特性および消弧グリッドの有効利用度改善に向けた検討

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2013/11/01

タイトル(英語): Characteristics of Arc Voltage for High-Current Air Arc under Arrangement of Deion Plates and Approach to Improving Availability of the Plates

著者名: 渡邉　真也（三菱電機（株）先端技術総合研究所），小倉　小倉（三菱電機（株）先端技術総合研究所）

著者名(英語): Shinya Watanabe (Advanced Technology R&D Center, Mitsubishi Electric Corp.), Kentaro Kokura (Advanced Technology R&D Center, Mitsubishi Electric Corp.)

キーワード: 配線用遮断器，大電流アーク，アーク電圧，消弧グリッド，消弧室設計　　circuit breaker，high current arc，arc voltage，deion plate，design of extinguishing chamber

要約(英語): In this study, (i) effect of deion plates on arc voltage and (ii) appropriate arrangement of the plates were investigated in order to develop a design guide of a circuit breaker which is able to interrupt fault current (> several kA). As for evaluation (i), improved effect on arc voltage under arrangement of the plates were evaluated quantitatively in association between arc voltage and the design factors which are current, arc length, internal pressure and number of the used plates. As the result, it was found that arc voltage rises 19.2V by number of split arc between the plates and electrical field in arc rises about 3V/mm under high internal pressure above 0.2MPa-g. Experimental formula constituted by the design factors for estimation of arc voltage was developed on the basis of the improved effect on the voltage. Since the formula is able to estimate actual arc voltage with a margin of error within about 7%, it would be provided as effective guidelines to design arc extinguishing chambers. As for evaluation (ii), dependences of the availability of used plates on electromagnetic force to drive arc were evaluated. As the result, it is found that the plates are used effectively by exerting above a certain electromagnetic force (e. g., above 5N in case of 5kA) on the arc between the electrode and the plate. Therefore, the improvement of magnetic design near the electrodes, especially the movable electrode, or the arranging enough space to drive the arc between the electrode and the plate would be improved availability of the used plates.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.133 No.11 （2013） 特集：開閉保護技術

本誌掲載ページ: 806-817 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/133/11/133_806/_article/-char/ja/