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    Thread: Buddhadev
Post: RE: Buddhadev
Very sad to hear sudden demise of young and energetic leader.....RIP BDC......you will be remembered forever for great service to Railway Signalling profession globally.
 nagaraju_dvv Missing categories 2 12,229 13-04-2017, 07:45 PM
    Thread: Is approach release fail safe?
Post: RE: Is approach release fail safe?
Alasdair Wrote: (07-03-2010, 05:42 PM) -- nagaraju_dw, To the best of my knowledge for approach control, we use delta tracks (or position detectors or track circuits) to start a timing relay (JR) ...
 nagaraju_dvv Principles Queries etc 9 57,552 08-03-2010, 06:16 PM
    Thread: Is approach release fail safe?
Post: RE: Is approach release fail safe?
In London Underground, they use Delta Rail Circuit for approach control. Delta Rail Circuit is a 10kHz open circuit superimposed on existing AC track circuit,whose length is small. The Delta Circuit ...
 nagaraju_dvv Principles Queries etc 9 57,552 06-03-2010, 08:21 PM
    Thread: Is approach release fail safe?
Post: RE: Is approach release fail safe?
PJW Wrote: (12-01-2010, 08:42 PM) -- Saraswathi Wrote: (12-01-2010, 07:57 PM) -- Hi guys, An interesting debate on "approach release"...... We approach release the signals to reduce the train ...
 nagaraju_dvv Principles Queries etc 9 57,552 04-03-2010, 09:04 PM