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.
Railway Signalling Version Control Railway Signalling Version Control :- All types of design details shall be uniquely identifiable. Version is primarily the medium for identification of a drawing and also for keeping track of the changes/alterations, the drawing may undergo over a period of time. Version may be a single letter or double letters followed by […]
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Railways Signalling Equipment Power Calculations Supply to different functions vary according to the type of signaling and type of equipments used . For example, signal heads may be fed at 110/12 V AC, 12 V DC, or maybe of LED type. Normally, the input to signaling installations will be of 650Volts which is stepped down and […]
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Hot Axle Box Detectors HABD – Presentation HOT AXLE BOX DETECTORS HABD – 1 All trains have axle boxes in which there are metal bearings either of the friction type or the roller type. These bear the weight of the train and allow the axle to turn freely, but if they are not kept well […]
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Route Locking Circuit Railway Signalling Locking of Route In free wired interlocking systems, locking of route is bifurcated into two distinct parts :- 1) Approach Locking – Achieved by dropping of ALSR relay at the time of signal clearance. 2)Back Locking which is popularly called ‘Route Locking’ – Achieved by dropping of USR relays in […]
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Railway Train Braking Concepts Introduction to Train Braking – 1 Initially braking was available only from locomotive and other vehicles on freight trains were unbraked. In UK it was a legal requirement to fit continuous brakes on Passenger trains. Vacuum brakes were initially dominant; their principal advantage was that they were easy to engineer […]
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Constraints on Positioning of Stop Signals 1.Position of Signals relative to Facing Points Where a signal reads over facing points, it shall be positioned not more than 800m from the first set of facing points so that risk due to following is minimised: I.Likelihood of the driver forgetting the indicated route II.The ability to accelerate […]
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