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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The Point Control Circuit

Railway Point Control Circuit & Point Indication Circuit

Railway Point Control Circuit & Point Indication Circuit Railway Point Control Circuit & Point Indication Circuit:– Fig 3.2 shows the point control circuit for an ‘N’ style frame. The differences here are the RC and NC lever bands which are used for the energization of the respective Reverse and Normal point auxiliary valves. Note that these lever […]

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Railway Point Detection Circuits 

Railway Point Detection Circuits  ‘V’ Style Frame Chairlock Point Circuits The Point Control, Lever Lock and Indication circuits for Chairlocks are identical to the Four  Foot point circuits already discussed. Detection Unlike Four Foot points, a Chairlock layout uses two separate and independent detection units, one for each rail switch. Each unit proves that its corresponding […]

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