To quickly interrupt a ground fault current flowing in a rail from the ground due to a rail potential rise, and prevent an inflow of the ground fault current into incidental equipment being a protection object.SOLUTION: At a railroad wayside, where incidental equipment (for example, railroad crossing equipment) 19 of a rail connected between a rail 4 and an A-type grounding 3a is arranged, a ground fault current interrupting device 50 prevents the railroad crossing equipment 19 from being damaged when a ground fault accident of a feeding circuit occurs. The ground fault current interrupting device 50 includes a fuse 51 for interrupting a ground fault current I. The fuse 51 is connected between a protective device 32 for lightning surge protection that is mounted to the railroad crossing equipment 19, and the A-type grounding 3a, and melts according to a potential rise of the rail 4 resulting from the ground fault accident, by using the ground fault current I flowing from the A-type grounding 3a to the rail 4 through the protective device 32, as a trigger, and thereby interrupts the ground fault current I.SELECTED DRAWING: Figure 1
【課題】レール電位上昇により接地からレールに流れる地絡電流を速やかに遮断して、保護対象となる付帯機器内への地絡電流の流入を抑制する。【解決手段】地絡電流遮断装置50は、レール4とA種接地3aとの間に接続されたレールの付帯機器(例えば、踏切設備)19が配設されている鉄道沿線において、き電回路の地絡事故が生じた際、踏切設備19の損傷を防止するものである。地絡電流遮断装置50は、地絡電流Iを遮断するヒューズ51を有している。ヒューズ51は、踏切設備19に設けられた雷サージ保護用の保安器32とA種接地3aとの間に接続され、地絡事故に起因するレール4の電位上昇により、A種接地3aから保安器32を通してレール4に流れる地絡電流Iをトリガにして溶断し、地絡電流Iを遮断する。【選択図】図1
GROUND FAULT CURRENT INTERRUPTING DEVICE
地絡電流遮断装置
2020-06-18
Patent
Electronic Resource
Japanese
INTERRUPTING DEVICE, INTERRUPTING METHOD, AND COMPUTER PROGRAM
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