track circuit interrupter

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Image:Track circuit interrupter.jpg

A track circuit interrupter may be fitted at catch points, trap points or buffer stops to maintain a track circuit in the 'occupied' state in the event of a derailment. The track circuit remains de-energised until the interrupter is replaced.

GK/RT0011 specifies the requirements for the provision of track circuit interrupters.

[http://www.rgsonline.co.uk/docushare/dsweb/Get/Rail-41377/Rt0064.pdf GK/RT0064: Provision of Overlaps, Flank Protection and Trapping] {{Webarchive|url=https://web.archive.org/web/20071211224247/http://www.rgsonline.co.uk/docushare/dsweb/Get/Rail-41377/Rt0064.pdf |date=2007-12-11 }}

Image:Track Circuit Interrupter - Diagram B.jpg on Down Line as blocked (twin red lights).]]