
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. == Application == === At catch or trap points === Trap points or catch points are designed to intentiona.....
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http://en.wikipedia.org/wiki/Track_circuit_interrupter

a device designed to interrupt the feed current to a track circuit in certain particular cases e.g. derailment of a train at catch points
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=821-03-27
No exact match found.