20-07-2010, 07:41 PM
(20-07-2010, 07:29 PM)Archie Wrote: in the case of 'single rail DC track circuits, what is the purpose of the relays from one track circuit to the other abutted to one another?
Not quite sure what you are meaning......
are you asking when a joint between adjacent track sections would have two track relays adjacent at the IRJ?
are you asking when a track relay of one section would be used to cut the feed to the adjacent track section?
something else?
Can youn re-phrase please
PJW