Track Circuits
Track circuits are a vital part of most signalling systems and a significant source of signalling related delays for many railways. CDSRail was the first company to apply remote monitoring principles to derive information about the operating condition of track circuits and has subsequently developed solutions to reliably identify deterioration. Most common types of track circuit equipment can be monitored for early detection of problems like poor shunt quality, ballast contamination and wiring faults.
Track circuit receiver current is monitored non-invasively using a Hall Effect sensor or current transformer installed in a trackside equipment case or signalling room. Sensors are connected to an isolated data logger which applies filtering techniques to remove unwanted noise such as DC traction current in AC tracks and AC noise on DC track circuits. Once acquired the track circuit energising current is analysed using an intuitive multiband alarming regime to determine if the measured value is within acceptable limits and transferred to the database server. Users can access the server over the internet from a standard PC to view alarm logs and graphical profiles of each track circuit operation.
Click here for the Track Circuits datasheet.