Patents by Inventor Helmut Frielingsdorf

Helmut Frielingsdorf 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).

  • Method for monitoring a capacitor bushing, and monitoring system
    Patent number: 6028430
    Abstract: A capacitor bushing with a tap for a reduced voltage between its capacitor inserts is monitored with the method. The reduced voltage is supplied to a detection device that monitors the reduced voltage for any change. A change and its time interval from a further change are determined, and an error signal corresponding to the frequency of the change in the reduced voltage is generated. The method may be performed with the disclosed monitoring system.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: February 22, 2000
    Assignee: HSP Hochspannungsgeraete Porz GmbH
    Inventor: Helmut Frielingsdorf