Patents by Inventor David J. Fedirchuk

David J. Fedirchuk 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).

  • Electrical bus protection method & apparatus
    Patent number: 7199991
    Abstract: A protection relay for a power line system that employs current transformers for detecting current on a bus is provided with a fault trip scheme that includes transformer current saturation detection so as to avoid false tripping due to temporary transformer current saturation.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: April 3, 2007
    Assignee: Nxt Phase T & D Corporation
    Inventors: David J. Fedirchuk, Gang Li, Zhiying Zhang, Dean S. Ouellette
  • Electrical bus protection method & apparatus
    Publication number: 20040057175
    Abstract: A protection relay for a power line system that employs current transformers for detecting current on a bus is provided with a fault trip scheme that includes transformer current saturation detection so as to avoid false tripping due to temporary transformer current saturation.
    Type: Application
    Filed: June 26, 2003
    Publication date: March 25, 2004
    Inventors: David J. Fedirchuk, Gang Li, Zhiying Zhang, Dean S. Ouellette