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    • 6. 发明专利
    • Switchgear
    • JP4752678B2
    • 2011-08-17
    • JP2006229553
    • 2006-08-25
    • 三菱電機株式会社
    • 昭彦 今城知孝 矢野太▲げん▼ 金修 高原
    • H01H33/42H01H33/53H01H33/662H01H33/666
    • H01H3/60H01H33/38H01H33/666
    • A switchgear apparatus is provided in which an impact induced by a close operation is mitigated, featuring space saving and high reliability with low costs. The switchgear apparatus includes a switching unit 3 that is composed of a fixed electrode 1 and a movable electrode 2; a movable shaft 4 that is extended from the movable electrode 2; an operating mechanism 5 that produces driving force and transfers the driving force to the movable shaft 4; a switching-unit holder 6 that holds the switching unit 3 and the movable shaft 4 thereinside; and a holder supporting unit 7 that has a fixing plane so as to fix the switching-unit holder 6 thereonto. The switchgear apparatus is arranged in such a manner that the holder supporting unit 7 serving as the fixing plane is constituted of a plurality of plates layered in the axial direction along the movable shaft 4. In a case of the close operation, because kinetic energy in the overall system is consumed by the friction generated between the layered plates owing to distortion of the layered plates, energy that allows the movable electrode 2 to bounce back and forth is lowered, so that it is possible to shorten a chattering time.
    • 7. 发明专利
    • Switchgear
    • JP4682046B2
    • 2011-05-11
    • JP2006017719
    • 2006-01-26
    • 三菱電機株式会社
    • 昭彦 丸山正博 有岡知孝 矢野敏恵 竹内靖 竹内
    • H02B3/00H01H33/00H01H33/66H01H33/662H01H33/668H02B13/025H02B13/065
    • PROBLEM TO BE SOLVED: To provide a switchgear which can detect the existence of abnormality of each part of itself, in condition that power saving is achieved in maintenance inspection and the operation of a main circuit is continued. SOLUTION: A switchgear such as a switchgear mounting an electromagnetic operation system of breaker, or the like is equipped with a sate monitor 400 comprising a drive monitoring circuit which detects the state of a breaker such as the change of any one or two or more points of friction out of the operation mechanism part and the middle mechanism part of a breaker, a main circuit mobile part, and a main circuit contact, the change of the wear amount of the main contact, the change of operation speed, etc. , by analyzing the waveform of the current applied to the drive coil within an electromagnetic operation mechanism 101 at operation of the breaker, based on the input from the drive current sensor 202 of an electromagnetic operation mechanism control circuit 200, and a magnetic flux monitoring circuit which monitors the magnetic density within the electromagnetic operation mechanism by the input from the magnetic sensor 101 arranged within the stator of the electromagnetic operation mechanism. COPYRIGHT: (C)2007,JPO&INPIT
    • 8. 发明专利
    • 真空劣化監視装置
    • 真空劣化监视设备
    • JPWO2014091926A1
    • 2017-01-05
    • JP2014551965
    • 2013-11-27
    • 三菱電機株式会社
    • 井上 直明直明 井上安部 淳一淳一 安部智子 田辺智子 田辺知孝 矢野知孝 矢野暁 吉田暁 吉田
    • H01H33/668H02B13/065
    • H01H33/668H01H33/26H02B13/065
    • 真空遮断器の真空劣化を判定すると共に、放送波や他の機器からの伝導ノイズなどの外来ノイズによる誤動作を防止するため、真空バルブ9の接続線をブッシング4を通して金属製タンク外へ導出する金属製タンク形真空遮断器15の真空劣化監視装置において、ブッシング4は、ローパス機能を有する内部シールド4bを有し、金属製タンク12の内部に設置された第一のアンテナ5、金属製タンク12の外部に設置された第二のアンテナ6、第一のアンテナ5で検出された真空バルブ9の部分放電に起因する電磁波の強度を測定する第一の検知部8A、第二のアンテナ6で検出された金属製タンク12外のノイズに起因する電磁波の強度を測定する第二の検知部8B、および第一の検知部8Aで検知された電磁波の強度と第二の検知部8Bで検知された電磁波の強度とを比較することにより、金属製タンク形真空遮断器15の真空劣化を判定する判定部8Cを備え、第一の検知部8Aおよび第二の検知部8Bは、真空バルブ9の真空劣化時に発生する放電に起因する電磁波の内、内部シールド4bで減衰される周波数帯を通過させる周波数フィルタ81、81a〜81dを備えている。
    • 与确定在真空灭弧室的真空恶化,为了防止误动作由于外部噪声等从广播波或其他设备传输噪声,金属通过套管4的外部导出所述真空阀9在金属罐的连接线 在生产罐型真空断路器15的真空劣化监视设备,套管4具有一个内部屏蔽4b中具有低通功能时,金属容器12内安装了第1天线5,金属罐12的 第二天线6,用于测量电磁波的强度由于通过外部安装的第一天线5检测到的真空阀9的局部放电的第1检测部8A,由第二天线6检测 和第二检测部8B,和由所述检测单元8A的强度和由所述检测单元检测到8B第二电磁波检测出的第一电磁波来测量所产生的电磁波的强度在金属罐12中的噪声的外部 与的实力对比 所述Rukoto,包括金属罐型真空断路器15中,第一检测部8A和第二检测部8B的确定单元8C真空退化包括由所述真空阀9的真空恶化产生的放电 始发电磁波,和一个频率滤波器81,81a〜81d中通过的频带的由内屏蔽4B衰减。