TRAIN EXISTING LINE DETECTING MONITOR IN TRACK CIRCUIT

PURPOSE:To reliably detect a train existing line in rainy weather, e.g. which is impossible to detect with a conventional device detecting the train existing line through the operation or restoration of a track relay. CONSTITUTION:The first train existing line detecting monitor sections 5, each of which is provided with a display 18 to measure a supply current Is in a track circuit 3T behind in the moving direction of a train out of adjacent track circuit 2T, 3T and track relay voltage (et) across the front track circuit 2T and to show how the measurements are higher or lower than a rated current and a rated voltage, are set up along the respective track circuits adjacent in sequence in conventional devices. The second train existing line detecting monitor sections 8 each of which is provided with a display to show measurements from the respective first train existing line detecting monitor sections 5 are set up in a maintenance area while being connected to the first train existing line detecting monitor sections 5 via transmission terminal equipment 6.