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:
Aug. 08, 2006
Filed:
May. 23, 2003
Bernd Siedelhofer, Heidelberg, DE;
Winrich Habedank, Leimen, DE;
Jörg Puhr-westerheide, Rauenberg-Malschenberg, DE;
Heinz Throm, Vierheim, DE;
Walter Kahl, Walldorf, DE;
Klaus Fritsch, Hochdorf-Assenheim, DE;
Bernd Siedelhofer, Heidelberg, DE;
Winrich Habedank, Leimen, DE;
Jörg Puhr-Westerheide, Rauenberg-Malschenberg, DE;
Heinz Throm, Vierheim, DE;
Walter Kahl, Walldorf, DE;
Klaus Fritsch, Hochdorf-Assenheim, DE;
ABB Patent GmbH, Ladenburg, DE;
Abstract
An electrical switching device for fault-current, overcurrent and short-circuit current protection, has a contact point in a current path and a switching mechanism for permanently opening the contact point. The switching device further has a configuration for detecting the fault current, the overcurrent and the short-circuit current, and contains two permanent magnets and a core. The core is disposed between the like poles of the permanent magnets which point toward one another and one of which is fixed and the other is guided such that it can move. The permanent magnets are at least partially surrounded by a coil through which a fault, an overcurrent or a short-circuit current flows. When a current flow occurs in the coil, the magnetic field is changed causing a relative movement of the moving part, and the movement is transmitted to the contact point.