Abstract
The choice of new signaling and safety equipment for track circuits is dependent on individual railway management organizations. For that reason, before making any decisions, railway management has to be very well informed about all parameters relevant to the electro-magnetic compatibility with return traction current during stationary regimes of operation. An examination is neccesary of external electro-magnetic interference to return traction current on track circuit operations must identify suitable protection measures to ensure secure and reliable track circuit operations. Building on that requirement, this work describes results of mathematical modelling which examined the impact of return traction current through railway tracks on the proper functioning of signaling and safety systems in the track system. This mathematical model has been tested through experimentiion on electrified tracks belonging to the Yugoslav Railways.
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