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Point Machine Railway Presentation It is a term used to describe the arrangement of rails that allow junctions to be made in the track. In simple terms arrangement of rails where two lines converge or diverge on a track. Components of Point Layout. Stock rails – 2 Switch Rail- 2 Gauge tie plate -1 Nose Crossing […]
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Railway Point Control Circuit Point Control Circuit :- Fig 6.2 shows the Point Control circuit for a right hand turnout set of Clamplocks. The WL detection contacts are cut into the NW and RW control lines to prevent the WL being damaged by the drive lock slide pushing against the thin WL dab. The full […]
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Railway Chairlock Circuit Controller Box Chairlock Circuit Controller Box :- As already discussed in Unit 6, the circuit controller boxes are handed and must be fitted to their correct respective Chairlock units. Here we will look at the physical contact numbering of the circuit controller boxes and their positional relationship to the point switches. Figures […]
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Railway WL Control Railway WL Control :- Contact number one on the open switch is used to control the de-energising of the WL in the same way that the AN & BR contacts are used on a set of Four Foots points. In the Normal position (Fig 5.7) the L.H. WL is locking the points. […]
Continue ReadingPoint 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 The main ‘W’ fuse has been replaced by a Miniature Circuit Breaker (MCB). The 12V D.C style F3 LPR has been replaced by a 100V A.C QNHX1 plug in […]
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Railway ‘N’ Style Frame Four Foot Point Circuits ‘N’ style frames are manually operated and at the time of writing (March 2007) are still in use, mainly on the SSL lines. However these will be gradually phased out as lines are re-signalled. In essence, the circuits used to control the points are very similar to […]
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