Patents by Inventor Randall J. Emanuel

Randall J. Emanuel 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).

  • Impedance-based arc fault determination device (IADD) and method
    Patent number: 8362789
    Abstract: Embodiments according to the present invention provide an Impedance-based Arc-Fault Determination Device (IADD) and method that, when attached to an electrical node on the power system and through observations on voltage, current and phase shift with a step load change, determine the effective Thevenin equivalent circuit or Norton equivalent circuit at the point of test. The device and method determine the expected bolted fault current at the test location of interest, which enables calculation of incident energy and the assignment of a flash-hazard risk category.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: January 29, 2013
    Assignees: Clemson University Research Foundation, Duke Energy Carolina, LLC
    Inventors: Edward Randolph Collins, Jr., Timothy Lee Smith, Randall J. Emanuel
  • IMPEDANCE-BASED ARC FAULT DETERMINATION DEVICE (IADD) AND METHOD
    Publication number: 20100026317
    Abstract: Embodiments according to the present invention provide an Impedance-based Arc-Fault Determination Device (IADD) and method that, when attached to an electrical node on the power system and through observations on voltage, current and phase shift with a step load change, determine the effective Thevenin equivalent circuit or Norton equivalent circuit at the point of test. The device and method determine the expected bolted fault current at the test location of interest, which enables calculation of incident energy and the assignment of a flash-hazard risk category.
    Type: Application
    Filed: October 2, 2009
    Publication date: February 4, 2010
    Inventors: Edward Randolph Collins, JR., Timothy Lee Smith, Randall J. Emanuel
  • Impedance-based arc fault determination device (IADD) and method
    Patent number: 7598751
    Abstract: Embodiments according to the present invention provide an Impedance-based Arc-Fault Determination Device (IADD) and method that, when attached to an electrical node on the power system and through observations on voltage, current and phase shift with a step load change, determine the effective Thevenin equivalent circuit or Norton equivalent circuit at the point of test. The device and method determine the expected bolted fault current at the test location of interest, which enables calculation of incident energy and the assignment of a flash-hazard risk category.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: October 6, 2009
    Assignees: Clemson University Research Foundation, Duke Energy Carolinas, LLC
    Inventors: Edward Randolph Collins, Jr., Timothy Lee Smith, Randall J. Emanuel