Aspect Sequence Chart Railway Signalling

Aspect Sequence Chart Railway Signalling Definitions: Aspect – any valid visual indication of a signal as displayed to the driver Aspect sequence – The order in which the aspects of successive signals are displayed to the driver Signal spacing – The distance between the signal or lineside sign displaying cautionary aspect and the signal or lineside sign at […]

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Level Crossing Interlocking

Railway Signalling Level Crossing Interlocking Circuits

Railway Signalling Level Crossing Interlocking Circuits • Connected Relays: • LXLR: This relay picks up by proving all concerned ASR/OVSRs of signals in whose route/overlap the L.C. gate falls are free.(i.e., picked up) and UCRs are de-energized (i.e., route is not set). • LXRR: It proves that the gate is free to be opened for […]

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Railway Signalling Track Circuits  Closed TC  Open Track Circuit Fed over track circuit

Railway Signalling Track Circuits | Closed TC | Open Track Circuit| Fed over track circuit

Railway Signalling Track Circuits | Closed TC | Open Track Circuit| Fed over track circuit A track circuit is a vehicle detection device in which the running rails form part of an electrical circuit. The boundaries of track circuit are marked by insulation joints on the rail and rails are bonded at rail joints for better conductivity. Uses […]

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Railway Signalling Selection Table Control Table

Railway Signalling Selection Table / Control Table

Railway Signalling Selection Table / Control Table In the relay interlocking systems, the safety of train movements in the yard has to be ensured in the various electrical signaling circuits that are prepared for the system. The circuits, therefore, have to be prepared carefully and meticulously and checked thoroughly from the point of view of […]

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