Patents by Inventor Marek Hagel

Marek Hagel 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).

  • Monitoring system for high-voltage switches
    Patent number: 7405569
    Abstract: A method and an apparatus are disclosed for measuring contact erosion in an electrical switching device by a dynamic resistance measurement (DRM). To determine an overlap time and a contact erosion in an exemplary switching device, a change in current across the switching device can be measured indirectly by a measurement current being passed across the switching device and a parallel conductor, the change in current in the parallel conductor being measured. Exemplary embodiments relate, to the following: detection of a differential current measurement signal in the parallel conductor with the aid of a Rogowski coil; and selection of a parallel conductor resistance on an order of the switch resistance.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: July 29, 2008
    Assignee: ABB Technology AG
    Inventors: Marek Hagel, Patrick Fehlmann
  • Monitoring system for high-voltage switches
    Publication number: 20070120567
    Abstract: A method and an apparatus are disclosed for measuring contact erosion in an electrical switching device by a dynamic resistance measurement (DRM). To determine an overlap time and a contact erosion in an exemplary switching device, a change in current across the switching device can be measured indirectly by a measurement current being passed across the switching device and a parallel conductor, the change in current in the parallel conductor being measured. Exemplary embodiments relate, to the following: detection of a differential current measurement signal in the parallel conductor with the aid of a Rogowski coil; and selection of a parallel conductor resistance on an order of the switch resistance.
    Type: Application
    Filed: November 30, 2006
    Publication date: May 31, 2007
    Applicant: ABB Technology AG
    Inventors: Marek Hagel, Patrick Fehlmann