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. 02, 2003
Filed:
Jun. 09, 2000
Stefan Gies, Regensburg, DE;
Reinhard Schmid, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A fault current detection system is provided. The detection system detects a fault current generated on a conductive path supplying power to an electric device and prevents the fault current from being supplied to the electric device. In particular, the detection system contains a detector, a switch, and a controller. The detector detects a fault current generated on the conductive path and outputs a corresponding detection signal. The controller inputs the detection signal and determines predetermined characteristics of the fault current based on said detection signal. Then, the controller identifies the fault current as a first type of fault current based on the predetermined characteristics and sets a trigger current to a first trigger current value when the fault current is identified as the first type of fault current. Also, the controller outputs a control signal to the switch to instruct the switch to isolate the electric device from the conductive network when the fault current is greater than the trigger current. In addition, a software program performed by the fault current detection system is also provided.