11-09-2016, 06:05 PM
I am no expert on bonding in any context, however, a project I am working on is adding "Cross-Bonding" to an existing railway with OLE fitted and 3rd rail d.c. power alongside. The reason is to provide better return paths for fault conditions owing to an OLE upgrade.
Tracks in the area are Reed and TI21 (EBI).
Generally a railway of up to 4 tracks will not have the same track frequencies parallel, therefore each cross-bond is between tracks of different frequencies. As PJW says adjacent Cross-bonds, both being bonded to the Return Conductor, could pass that interference along, or there is the scenario with more than 4 parallel tracks. I found out this would be a problem for "normal" Reed track receivers but TI21 and the higher spec Reed tracks we have are OK.
Tracks in the area are Reed and TI21 (EBI).
Generally a railway of up to 4 tracks will not have the same track frequencies parallel, therefore each cross-bond is between tracks of different frequencies. As PJW says adjacent Cross-bonds, both being bonded to the Return Conductor, could pass that interference along, or there is the scenario with more than 4 parallel tracks. I found out this would be a problem for "normal" Reed track receivers but TI21 and the higher spec Reed tracks we have are OK.