07-05-2009, 06:31 AM
I would like to ask if for the AC track circuits adjustment, we need to consider some safety margine as we do in DC track circuits?
in adjusting the DC track circuits regulating resistance, usually we consider a factor of 2.5 for the relay P.U.V. in its maximum value of ballast resistance and track power supply and a 1.25 in its minimum values of ballast resistance.
are these factors also valid for AC TCs?
Mirabadi
in adjusting the DC track circuits regulating resistance, usually we consider a factor of 2.5 for the relay P.U.V. in its maximum value of ballast resistance and track power supply and a 1.25 in its minimum values of ballast resistance.
are these factors also valid for AC TCs?
Mirabadi