Railway Signalling Concept of Overlap and Isolation | Overlaps | Block Over Lap (BOL) | Signal Over Lap (SOL)

Railway Signalling Concept of Overlap and Isolation | Overlaps | Block Over Lap (BOL) | Signal Over Lap (SOL) Concept of Overlap and Isolation:- Every stop signal by its indication to the driver controls the movement of train upto the next stop signal as the next stop signal will control the movement beyond it. Hence […]

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Railways Gate Signal | Routing Indicator | Junction type route indicator | Multi lamp route indicator

Railways Gate Signal | Routing Indicator | Junction type route indicator | Multi lamp route indicator Gate Signal :-  The Gate stop signal shall be provided with „G‟ marker. Letter „G‟ in black on a yellow circular disc. A semi-automatic stop signal interlocked with a level-crossing gate shall be provided with „G‟ marker disc and […]

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Railway Dead approach locking,Back locking or route locking

Railway Dead approach locking|Back locking or route locking

Railway Dead approach locking|Back locking or route locking Dead approach locking: It is seen that for providing approach locking, a track circuit for a length of 1,2kms. Need to be provided. Provision of such a long track circuit for the purpose of approach locking is a costly proposition. Therefore, the approach locking is provided without the […]

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Railway Isolation - Rules regarding isolation - Methods of Isolation

Railway Isolation Rules regarding isolation Methods of Isolation

Railway Isolation Rules regarding isolation Methods of Isolation Isolation The term isolation denotes the condition in which line for a particular movement of a train is separated from all adjoining lines connected to it in such a manner that it cannot be fouled or interfered with by any movement taking place on the adjoining lines […]

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Railway Point Control And Lever Lock Circuits, Detection Circuits 

Point Control And Lever Lock Circuits Fig 4.1 shows the Point Control and Lever Lock circuits for a set of double-ended flat bottom four foot points. The main ‘W’ fuse has been replaced by a Miniature Circuit Breaker (MCB). The 12V D.C style F3 LPR has been replaced by a 100V A.C QNHX1 plug in […]

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