Patents by Inventor Hartmut Mahnert

Hartmut Mahnert 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).

  • Procedure for producing an initiation signal after the current differential protection principle arrangement
    Patent number: 6842319
    Abstract: The invention relates to a method and arrangement for generating a trigger signal according to the current differential protection principle when a fault occurs on a section of an electrical power supply system, in which differential current values and stabilization current values are detected and monitored with regard to exceeding limit values. A trigger signal is generated if positive results of the instances of monitoring are present. The differential current values and the stabilization current values are calculated with instantaneous values of the detected power supply currents as instantaneous values. A first measurement quantity and a second measurement quantity are formed, and a check is made to determine whether the two measurement quantities exceed a predetermined limit value of the differential quotient of the differential current with respect to time. If the instances of evaluation and the instances of monitoring produce positive results, the trigger signal is generated.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: January 11, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hartmut Mahnert, Josef Nibler
  • Method for generating a trigger signal according to the current differential protection principle and current differential protection arrangement
    Publication number: 20020161485
    Abstract: Method for generating a trigger signal according to the current differential protection principle and current differential protection arrangement
    Type: Application
    Filed: February 4, 2002
    Publication date: October 31, 2002
    Inventors: Hartmut Mahnert, Josef Nibler