Patents by Inventor Ronald T. Harrold

Ronald T. Harrold has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Detection of arcing faults in generator windings
    Patent number: 4156846
    Abstract: A method is provided for detecting the presence of arcing faults in the stator windings of large dynamoelectric machines, such as turbine generators. Arcing faults, such as broken strands in a winding conductor with continued arcing, give rise to high frequency currents which flow in the neutral lead of the generator winding. The presence of the arcing fault can thus be detected by observing the high frequency neutral currents and monitoring them for the presence of the characteristic frequency distribution resulting from the resonance characteristics of the current path.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: May 29, 1979
    Assignee: Westinghouse Electric Corp.
    Inventors: Ronald T. Harrold, Emil M. Fort, Herbert E. Pietsch