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:
Feb. 15, 2011
Filed:
Sep. 06, 2006
Konrad Spindler, Ursensollen, DE;
Josef Koller, Burglengenfeld, DE;
Markus Meier, Rieden, DE;
Johann Seitz, Amberg, DE;
Andreas Fritsch, Kümmersbruck, DE;
Konrad Spindler, Ursensollen, DE;
Josef Koller, Burglengenfeld, DE;
Markus Meier, Rieden, DE;
Johann Seitz, Amberg, DE;
Andreas Fritsch, Kümmersbruck, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
At least one embodiment of the invention relates to a protective circuit for protection of an appliance, in particular of an electric motor, against thermal overloading. In at least one embodiment, the protective circuit includes a first and a second terminal for connecting a temperature detection element; a detection unit for detecting whether a resistance value of the temperature detector element which is connected between the first and the second terminals, is in a first or a second resistance range; a short-circuit detector for identifying whether there is a short circuit between the first and the second terminals; signaling outputs for emitting signal messages to an evaluation unit when the detected resistance value is in the second resistance range and/or when a short circuit has been identified by the short-circuit detector; and a third terminal, which is connected to the second terminal via a predetermined resistance.