PROBLEM TO BE SOLVED: To provide a ground fault protection system capable of operating a circuit breaker on a substation side to shut off a ground fault current when a high resistance ground fault occurs and a ground fault protection device used for the same.SOLUTION: In a ground fault protection system at a substation for a railroad track to which an impedance bond is connected in the middle of a return wire, where a feed line and the return wire from the substation equipped with a transformer is laid, the substation is provided with a circuit breaker connected between the transformer and the electric wire or the return wire. Between the impedance bond and the earth, a ground fault protection device having discharge means for discharging when a voltage equal to or higher than a predetermined value is applied, and operation detection means capable of detecting operation of the discharge means is provided. The ground fault protection device includes signal sending means for generating a detection signal in response to the operation detection means detecting operation of the discharging means and outputting the detection signal to the substation and shuts off the circuit breaker when the substation receives the detection signal.SELECTED DRAWING: Figure 1
【課題】高抵抗地絡が発生した場合に変電所側において遮断器を動作させて地絡電流を遮断することができる地絡保護システムおよびそれに用いる地絡保護装置を提供する。【解決手段】変圧器を備えた変電所からのき電線および帰線電線が敷設され、帰線電線の途中にインピーダンスボンドが接続されている電鉄路線用変電所における地絡保護システムにおいて、変電所には変圧器とき電線または帰線電線との間に接続された遮断器を設け、インピーダンスボンドと大地との間には、所定値以上の電圧が印加された際に放電する放電手段および該放電手段が動作したことを検出可能な動作検出手段を有する地絡保護装置を設け、地絡保護装置は、動作検出手段が前記放電手段の動作を検出したことに応じて検出信号を生成し変電所へ出力する信号送出手段を備え、変電所が検出信号を受信すると遮断器が遮断されるように構成した。【選択図】図1
GROUND FAULT PROTECTION SYSTEM AND GROUND FAULT PROTECTION DEVICE IN SUBSTATION FOR RAILROAD TRACK
電鉄路線用変電所における地絡保護システム及び地絡保護装置
29.11.2018
Patent
Elektronische Ressource
Japanisch
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