Information About Axle Counter,Track Structure Point & Crossing,Cable Schematics,CBTC Equipment,Overlaps,Core Plans,Earthing,ERTMS,Headway Calculation,Hot Axle Box Detectors,Interface Design,Level Crossing,Markers & boards,Bonding Plan Electrical Lockings,Route locking,Automatic Warning Systems AWS,Point Circuit,Equipment Treadle,Track Layout,Track Circuit Interrupters,Train Protection Warning System (TPWS),Slip Siding & Catch Siding.
Button Description and Button Nomenclature Individual Button Description • GN – Signal Button Red • UN – Exit or Route Button White or Grey • WN – Individual Point Button Black • NWWN – Common Normal Point Button Black with red dot • RWWN – Common Reverse Point Button Black with red dot • EWN […]
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Railways Signalling Relays | Shelf type Relays Relays Relay is an electromagnetic device which is used to convey messages electrically from one circuit to another circuit through a set of contacts (back or front contacts)and works on the principle of electromagnetism. Relays are classified as : According to the source of power applied – DC […]
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Railway Panel Diagram with Switches / Buttons Conditions to be satisfied before a signal is cleared: * The concerned buttons or knob has been operated by pressing or turning. * The points required on the route, the overlap and isolation are set and locked correctly and the route is locked. * The track is clear […]
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Railway Track Axle Counter Comparison with track circuit. * To detect the presence of vehicle within a prescribed distance is the role of track circuit. * Dropping of track relay is due to shorting of rails by the axles of a vehicle train. Disadvantages of track circuits: * Either wooden or P.S.C. sleepers needed. * […]
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Railway Route Selection Railway Route Selection :- The energisation of GNR & UNR energizes the route selection relay (LR), provided that no conflicting route is set. Thus the basic interlocking is ensured at this first stage itself. LR is designated after the signal number & with route alphabet, if the signal has more than one […]
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Railway Signalling Electrical Detector The electrical detector is an electromechanical device to check the position for correct setting and locking of points through making an electrical contact, which closes a circuit. It has two sets of fixed contacts. In centre, bridging contact assembly on a roller cam shaft, which works in conjunction with the points […]
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