Switch Diamond Crossing

Railway Points and Track circuits 

Railway Points and Track circuits  Railway Points and Track circuits:- Points Normal lie points Points Numbering Track circuits Overlap Replacement Joint Berth track circuit Point Zone TC Numbering Railway Points and Track circuits – Normal lie of points Selection Criteria the most obvious is that whereas the straight route through a set of points can […]

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Minimum Length

Railway Bonding Details in D.C. Electrified Areas

Railway Bonding Details in D.C. Electrified Areas Railway Bonding Details in D.C. Electrified Areas:- Separate Track Plans and Negative Bonding Plans are only used in the former Southern Region. The impedance bond rail connections and the bond to bond connections must be shown on bonding plans. Traction return cross bonding between lines is the responsibility […]

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Railway Insulated Rail Joints

Railway Insulated Rail Joints

Railway Insulated Rail Joints Railway Insulated Rail Joints:- Insulated Rail Joints (IRJs) are required to join together mechanically but no electrically. they are required for the following purposes: to define the limits of jointed track circuits, to provide insulation between rails at S&C, necessitating track circuit transpositions, where transpositions are required for other purposes, to […]

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Axle Counters Fouling Point Clearance point

Railway Use of Axle Counters Fouling Point Clearance point

Railway Use of Axle Counters Fouling Point Clearance point Railway Use of Axle Counters Fouling Point Clearance point:- The Design requirements for train detection systems includes the following: Interface with authorized rail vehicles (positioning of IRJs, minimum track circuit lengths, which may be dependent on permissible speed, and interlocking measures to mitigate against any deficiencies) […]

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Overrun Protection

Railway Route Release Circuits      

Railway Route Release Circuits             Railway Route Release Circuits:- Approach locking Release of Approach locking as per GK/RT0063, para 4.2. Approach locking shall be released, after replacement of the signal to danger, either by. the train passing the signal is detected such that the route or track locking is effective for the route ahead of the […]

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