Hybrid DC Circuit Breaker and Method for Controlling

Oliver Cwikowski (Inventor), Roger Shuttleworth (Inventor), Michael Barnes (Inventor)

    Research output: Patent

    43 Downloads (Pure)


    A circuit breaker and method of controlling Direct Current is disclosed. The circuit breaker has a primary conduction path (202) comprising a positive temperature coefficient (PTC) device with a positive temperature coefficient of resistance and a mechanical switch (204, CB1) is connected in series with the PTC device. There is a secondary conduction path (210) with a semiconductor switch device (211, S1; 212, S2) arranged in parallel with the PTC device. The PTC device is arranged to commutate current to the secondary conduction path in response to an increase in current through the primary conduction path. The semiconductor switch device (211, S1; 212, S2) is controllable to break current flow through the secondary conduction path.
    Original languageEnglish
    Patent numberWO2014177874 A3
    Priority date3/05/13
    Publication statusPublished - 3 May 2013


    • HVDC
    • Circuit Breaker
    • Superconductor
    • PTC
    • VSC-HVDC


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