Patents Assigned to Schweitzet Engineering Laboratories, Inc.
  • Distance protective relay using a programmable thermal model for thermal protection
    Patent number: 7239496
    Abstract: The system includes a distance protective relay for power lines which includes a logic capability which is responsive to settings entered into the relay by an end user to implement the value of those settings into stored thermal model equations which emulate the temperature of the power line conductor. The logic within the relay is organized and has the capability of receiving the setting values entered by the user and to use those in the logic equations to determine the temperature of the conductor.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: July 3, 2007
    Assignee: Schweitzet Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Gabriel Benmouyal, Michael B. Bryson