報告書番号

181047

タイトル（和文）

限流しゃ断装置の基礎特性（第６報）－水冷エレメントによる高速直流しゃ断特性－

タイトル（英文）

BASIC PROPERTIES OF CURRENT LIMITING INTERRUPTERS (6) -HIGH SPEED DC INTERRUPTION BY CURRENT-THRU ELEMENTS WITH FORCED WATER COOLING-

概要 （図表や脚注は「報告書全文」に掲載しております）

交直変換所の半導体保護用として開発した水冷式限流しゃ断装置の通電能力と高速限流しゃ断特性を検討した。（１）水冷エレメントの通電特性をパイプ状，帯状，線状の３種類について比較した。（２）水冷帯エレメントのしゃ断特性として，アーク電圧，並列ＺｎＯによるエネルギー吸収効果，転流コンデンサによるしゃ断限界電圧の向上効果，負荷電流の影響などを検討した。

概要 （英文）

A NEW TYPE OF A FAST-ACTING CURRENT LIMITINGINTERRUPTER WITH A WATER-COOLED FUSING ELEMENT WAS STUDIED AS ONE MEASURE OF SHORT-CIRCUIT CURRENT PROTECTION FOR SEMICONDUCTORS IN AC-DC SUBSTATIONS.THE FUSING ELEMENT OF SILVER IS SETTLED IN A DIELECTRIC TUBE OF 3.3MM DIAMETER AND ITS SURFACE IS DIRECTLY FORCED-COOLED BY A HIGH-SPEED COOLING WATER WITH VELOCITY OF 0.5 TO 8M/S. (1)MINIMUM FUSING CURRENTS OF TUBULAR, WIRE AND BAND ELEMENTS ARE NEARLY SAME AT LOW SPEED OF COOLING WATER, HOWEVER THAT OF THE TUBULAR ONE IS THE HIGHEST AND THAT OF THE BAND IS THE SECOND AT HIGH SPEED OF COOLING WATER SUCH AS 10M/S.(2)PEAK ARC VOLTAGE BETWEEN THE TERMINALS IS THE HIGHEST IN CASE OF THIN ELEMENT AND NO NOTCHES AND NEARLY PROPORTIONAL TO THE ROOT OF ARC CURRENT. (3)METAL OXIDE ARRESTER,ZNO,CAN BE USED AS AN ENERGY DISSPATING DEVICE IN PARALLEL TO THE ARC. (4)COMMUTATING CAPACITOR IN PARALLEL TO ZNO CAN MAKE THE VOLTAGE LIMIT OF DC LINE TO BE INTERRUPTED HIGHER. (5)THE HIGHER LOAD CURRENT AT THE FAULT TIME,THE SHORTER PRE-ARC TIME OF ELEMENT AND ALSO INTERRUPING TIME OF DC CIRUIT.

報告者

キーワード