Patents by Inventor Eduard Schneerson

Eduard Schneerson 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 protective gear
    Patent number: 6426856
    Abstract: A method of operating a protective gear is described, in particular a remote protective gear for an electric power grid. In this method, a voltage signal is derived from the line voltage, and a current signal is derived from the line current. To guarantee reliable detection of a fault in the measurement circuit of protective gear, a voltage drop is gated with a current surge. A monitoring device provided for this purpose gates a first detection signal derived from the voltage signal for the voltage drop with a second detection signal derived from the current signal for the current surge. The monitoring function is suitable for both single-phase and multi-phase networks and permits a reliable differentiation between a network fault and a failure of the measuring circuit.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: July 30, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Eduard Schneerson, Thomas Liebach