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:
Dec. 18, 2007
Filed:
Mar. 02, 2005
Thomas Driehorn, Berlin, DE;
Andreas Krauss, Berlin, DE;
Andreas Pancke, Berlin, DE;
Ilka Redmann, Falkensee, DE;
Wolfgang Röhl, Berlin, DE;
Thomas Driehorn, Berlin, DE;
Andreas Krauss, Berlin, DE;
Andreas Pancke, Berlin, DE;
Ilka Redmann, Falkensee, DE;
Wolfgang Röhl, Berlin, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A three or four pole low-voltage power switch is disclosed wherein the switch is partly provided with a device for detecting ground faults. For this purpose, the current vectorial sum must be produced in the three or four conductors of a monitored network. For the switches of this type, output signals received from Rogowski coils are directed via resistances to an integration capacitor whose voltage forms an input signal of another measuring amplifier representing the current sum of a monitored network. The output signal of the measuring amplifier is, afterwards processed in a known manner in the microprocessor of an excess-current trip.