GAS INSULATED SWITCHGEAR

To provide a gas insulated switchgear provided with a grounding switch or a disconnector (including a grounding disconnector) having a movable element that does not have a slit for preventing rotation, and capable of performing an abnormality diagnosis, especially an abnormality diagnosis for the mo...

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Bibliographische Detailangaben
Hauptverfasser: YAMANE YUICHIRO, ROKUNOHE TOSHIAKI, HOSONO TAKAFUMI, NUKAGA ATSUSHI, ARAI ATSUSHI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a gas insulated switchgear provided with a grounding switch or a disconnector (including a grounding disconnector) having a movable element that does not have a slit for preventing rotation, and capable of performing an abnormality diagnosis, especially an abnormality diagnosis for the movable element.SOLUTION: A gas insulated switchgear 10 is provided with at least one of a grounding switch 11, grounding disconnector, and disconnector as a switchgear. The switchgear 11 is provided with: a movable element 4 being linearly movable; a rod-like member 5a connected to the movable element 4 and rotates to linearly move the movable element 4; a motor 6 for rotating the rod-like member 5a; a current measurement device 7 for measuring a load current of the motor 6; and a computer 8 for inputting the load current measured by the current measurement device 7. The computer 8 determines that the movable element 4 is abnormal when a load current is larger than a load current Ia when a normal movable element 4 moves stably for an arbitrarily predetermined time Δt or more in a range of time t in which the normal movable element 4 moves stably.SELECTED DRAWING: Figure 2 【課題】回転防止のスリットを持たない可動子を有する接地開閉器または断路器(接地断路器も含む)を備え、異常診断、特に可動子の異常診断ができるガス絶縁開閉装置を提供する。【解決手段】本発明によるガス絶縁開閉装置10は、開閉装置として接地開閉器11、接地断路器、及び断路器のうち少なくとも1つを備える。開閉装置11は、直線移動可能な可動子4と、可動子4に接続され、回転することにより可動子4を直線移動させる棒状部材5aと、棒状部材5aを回転させるモータ6と、モータ6の負荷電流を測定する電流計測装置7と、電流計測装置7が測定した負荷電流を入力する計算機8とを備える。計算機8は、正常な可動子4が安定して移動する時間tの範囲内において、負荷電流が、任意に定めた所定の時間Δt以上、正常な可動子4が安定して移動するときの負荷電流Iaよりも大きい場合には、可動子4が異常であると判定するように構成されている。【選択図】図2