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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 Track Locking Distance The distance between the track circuit block joint and the tips of the switches is known as the track locking distance and is marked as ‘X’ on. shows the track locking contact incorporated in the point circuit. The track locking distance will vary according to the type of track circuit, […]
Continue ReadingRailway 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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Railway ‘V’ Style Frame Four Foot Point Circuits With Insufficient Track Locking This section shows two complete point circuits demonstrating insufficient track locking. Utilising an extra track circuit V’ Style Frame Four Foot Point Circuits With Insufficient Track Locking Abbreviations Electrical Supplies BX100 – Live side of single-phase 100V AC feed NX100 […]
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Right-hand Turnout, Single End, Without WL Right-hand Turnout, Single End, With WL Right-Hand Turnout, Double Ended, Without WL Right-hand Turnout, Double Ended, WL At ‘A’ End Right-hand Turnout, Double Ended, WL At ‘B’ End Left-hand Turnout, Single End, Without WL Left-hand Turnout, Single End, With WL Left-hand Turnout, Double Ended, […]
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Railway WL Control Circuits If a conventionally wired set of points were thrown from N to R and the Reverse contacts did not make, due to a mechanical fault or a badly adjusted indication arm for example, the WL would drop in to its port and the WKR will not energise. If an attempt is […]
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