11-07-2017, 09:02 AM
But firstly I'd like to tell why I need exactly a book or any reference book. All the information we can find in the internet, including on the present site, are quite nice and interesting for selfeducation. But can you imagine, for example, that a kind of the texts are refered to in list of referances in some scientific articles. As for Russia I can present two the most respected books: N. F. Kotlyarenko "Electric track circuits" and V. S. Arkatov, A.I. Bazhenov, N. F. Kotlyarenko "Track circuits of main lines".
In Russia in the main approach of designing of track circuits we use the theory of transmission lines and linear 2-ports networks. Such kind of approach can look a little bit overcomplicated, but in fact gives a lot of opportunities like opportunity to optimise the transferring of the energy from feeder to receiver. In the first book I've mentioned above you can find that the input impedance of all the cascades connected directly to rails should be equal to the caracteristic impedance of track for DC. As for AC the input impedance of general load connected to rails should be equal to complex conjugate value of the caracteristic impedance of track.
Now the regimes.
Normal regime is a regime of operating of fualt-free non-occupied track circuite which assurs that track is "non-occupied" is reliable mode. For each regime the wost conditions should be assumed. For normal regime the worst conditions are the min value of ballast (1 ohm km for lines and 0.5 ohm km for stations) resistance and max value of rail resistance. The result of calculation is the U_min of generator that assurs the reliable mode of normal regime.
Sunt regime is a regime of operating of fualt-free occupied track circuite which assurs that track is "occupied" is reliable mode. For shunt regime the worst conditions are the max value of ballast (50 ohm km) resistance, min value of rail resistance, shunt is located on the side of generator or receiver. The result of calculation is the U_max of generator that assurs the reliable mode of shunt regime. Resistance of shunt is normative and equal to 0.06 Ohm (excluding those ones utilising on hamp yards)
Control regime is a regime of operating of track circuite with broken rail which assurs that track is "occupied" is reliable mode. For control regime the worst conditions are the critical value of ballast resistance (calculated specifecly for each TC), max value of rail resistance, rail is broken in the middle of track. The result of calculation is the U_max of generator that assurs the reliable mode of control regime.
Once the shunt and control regimes have been calculated we choose the final U_max. Applyng U_max for normal regime we assure that max value on the receiver will not damage it.
Short circuit regime is a regime of operating of fualt-free occupied track circuite with an axle is at the piont where feeder is connected to. For short circuit regime the worst condition is the final U_max. Generator should not be damaged in short circuit regime.
Continuous cab signalling regime is a regime of operating of fualt-free occupied track circuite that assures the reliable transmission of code on the most remote point of the track
In Russia in the main approach of designing of track circuits we use the theory of transmission lines and linear 2-ports networks. Such kind of approach can look a little bit overcomplicated, but in fact gives a lot of opportunities like opportunity to optimise the transferring of the energy from feeder to receiver. In the first book I've mentioned above you can find that the input impedance of all the cascades connected directly to rails should be equal to the caracteristic impedance of track for DC. As for AC the input impedance of general load connected to rails should be equal to complex conjugate value of the caracteristic impedance of track.
Now the regimes.
Normal regime is a regime of operating of fualt-free non-occupied track circuite which assurs that track is "non-occupied" is reliable mode. For each regime the wost conditions should be assumed. For normal regime the worst conditions are the min value of ballast (1 ohm km for lines and 0.5 ohm km for stations) resistance and max value of rail resistance. The result of calculation is the U_min of generator that assurs the reliable mode of normal regime.
Sunt regime is a regime of operating of fualt-free occupied track circuite which assurs that track is "occupied" is reliable mode. For shunt regime the worst conditions are the max value of ballast (50 ohm km) resistance, min value of rail resistance, shunt is located on the side of generator or receiver. The result of calculation is the U_max of generator that assurs the reliable mode of shunt regime. Resistance of shunt is normative and equal to 0.06 Ohm (excluding those ones utilising on hamp yards)
Control regime is a regime of operating of track circuite with broken rail which assurs that track is "occupied" is reliable mode. For control regime the worst conditions are the critical value of ballast resistance (calculated specifecly for each TC), max value of rail resistance, rail is broken in the middle of track. The result of calculation is the U_max of generator that assurs the reliable mode of control regime.
Once the shunt and control regimes have been calculated we choose the final U_max. Applyng U_max for normal regime we assure that max value on the receiver will not damage it.
Short circuit regime is a regime of operating of fualt-free occupied track circuite with an axle is at the piont where feeder is connected to. For short circuit regime the worst condition is the final U_max. Generator should not be damaged in short circuit regime.
Continuous cab signalling regime is a regime of operating of fualt-free occupied track circuite that assures the reliable transmission of code on the most remote point of the track