Information About Axle Counter,Track Structure Point & Crossing,Cable Schematics,CBTC Equipment,Overlaps,Core Plans,Earthing,ERTMS,Headway Calculation,Hot Axle Box Detectors,Interface Design,Level Crossing,Markers & boards,Bonding Plan Electrical Lockings,Route locking,Automatic Warning Systems AWS,Point Circuit,Equipment Treadle,Track Layout,Track Circuit Interrupters,Train Protection Warning System (TPWS),Slip Siding & Catch Siding.
The Detection Circuit Figs 1.12 and 1.13 show a typical detection circuit for a single ended right-handed set of Four Foots. To change the phasing of the ‘R’ side the BX and NX feeds need to be changed by 180º (R1 and R2 feeds swapped around). In the detection circuit this is achieved by using […]
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Railway Electromagnetic screening Induced voltage in the cable core E = – ZI Kr Kc Km, where Z = j ω M and ω=2 π f E = Induced voltage in Cable Conductor/KM ω = angular frequency Z= mutual impedance between OLE & S&T conductor per unit length (in ohms) M = Mutual inductance between […]
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Railway Overhead Line Equipment Overhead Line Equipment (OLE) includes Wires suspended over the railway line for supplying electricity to electric trains, including associated: Fittings Insulators Feeders Switches Jumpers Return conductors OLE wires Catenary wire and Contact wire 1. Catenary wire is carried on insulators or insulated supports attached to the structures. 2. Contact wire is […]
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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 Point Operation Of The Ground Lock (WL) Railway Point Operation Of The Ground Lock (WL) :- With the controlling lever (Fig 1.24) and the points laying Normal, the feed from the W fuse passes over the TR contact (not shown) and the NC band to the BR contact (Fig 1.25). As the points are […]
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Railway Point Lever Lock Circuit & The Indication Circuit Lever Lock Circuit Every set of points which has a passenger move over them, must be track locked as discussed in 9.17. Another way of achieving this is to prevent the controlling point lever from moving. In many situations, both methods are used to prevent the […]
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