Assuring Compatibility Between Signalling
Systems And Earthing Systems - A New Approach
Author(s)
H.W.M. Smulders, P.G. Gonçalves, H.J. van Dijk,
A. M. Barreto & M.F.P. Janssen
Abstract
In the design of traction return current, earthing and bonding systems the
compatibility between this system and the signalling layer is an important issue.
Very often, Broken Rail Detection is one of the functions desired from the train
detection system. The demand for redundancy in the return current path,
combined with cross-connections between return conductors (needed for human
safety, accessible voltage), conflicts with this demand. Redundancy and cross
connections lead to parallel paths and thus to the loss of Broken Rail Detection.
To ensure the functioning of broken rail detection, an increase of the
impedance of the parallel path is needed at train detection frequencies, while at
the same time a cross
Keywords
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