Track Circuit Capacitors

About the product

API Capacitors offer a range of low frequency AC adjustable track circuit feed/relay end capacitors and high frequency DC fixed capacitors for jointless track circuits used in track-side signalling equipment.

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Long life and high reliability is achieved for both variants using ultra low defect density, high isotactic, metallised polypropylene dielectric film with self-healing capability. Elements are wound on the latest precision edge controlled automatic winding machines. Low frequency AC adjustable track circuit feed/relay end capacitors are manufactured with multiple capacitive sections that can be switched using locking metal switches to match the track circuit conditions.

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Resistors are incorporated into the design to protect against transient peak currents. Capacitive elements are hermetically sealed within polyurethane resin and enclosed in an IP67 rated insulated case. High frequency DC fixed capacitors for jointless track circuits are manufactured to less than 1% tolerance and incorporate a dielectric system that ensures capacitance stability across a wide temperature range.

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Capacitive elements are hermetically sealed within polyurethane resin and enclosed in an aluminium case.