Patent ID: 8333349

Claim:
An apparatus for supplying track circuits in a railway line provided with a plurality of individual track circuits adjacent to one another and electrically insulated from one another, each individual track circuit comprising a pair of rails (R) and a transmission block ( 2 ), capable of supplying that individual track circuit with a voltage which causes a current to flow in that individual track circuit, said current that is delivered and absorbed by that individual track circuit being detectable on board a train that is traveling along that individual track circuit, said apparatus being characterized in that it comprises at least one plant-controller electronic card (CdE) of that individual track circuit, which is designed to detect the current absorbed by that individual track circuit and delivered by the transmission block ( 2 ) and to increase the voltage supplied by a predetermined amount if a value of said current that is delivered and absorbed is lower than a value of at least one predetermined lower threshold value and to reduce the voltage supplied by a predetermined amount if the value of said current that is delivered and absorbed is higher than at least one predetermined upper threshold value.