The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2016
Filed:
May. 06, 2011
Joerg Blumschein, Berlin, DE;
Michael Claus, Nuremberg, DE;
Volker Henn, Erlangen, DE;
Matthias Kereit, Berlin, DE;
Gustav Steynberg, Igensdorf, DE;
Yilmaz Yelgin, Berlin, DE;
Joerg Blumschein, Berlin, DE;
Michael Claus, Nuremberg, DE;
Volker Henn, Erlangen, DE;
Matthias Kereit, Berlin, DE;
Gustav Steynberg, Igensdorf, DE;
Yilmaz Yelgin, Berlin, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A first protective device monitors a first section of a power supply network for a symmetrical short-circuit and a second protective device monitors a second section for a symmetrical short-circuit. The second protective device is a reserve protective device, which emits a shut-off command to a power switch after a time lag when a symmetrical short-circuit in the first section is recognized. An oscillation recognition unit emits an oscillating signal which blocks the shutoff command if an oscillation in the power supply network has been recognized. External symmetrical short-circuits can be disconnected independently of an occurring oscillation, when the second protective device has recognized a symmetrical short-circuit in the first section, before the oscillation recognition unit recognizes an oscillation in the power supply network, the shut-off command is emitted independently of the presence of an oscillating signal if the lag time has elapsed.