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:
May. 30, 2000
Filed:
Nov. 25, 1997
Alain Del Vecchio, Eybens, FR;
Hong Nguyen, Grenoble, FR;
Scheinder Electric Sa, , FR;
Abstract
The electronic trip device comprises in series for each phase of a power system a sampler, a squaring circuit and a finite impulse response (FIR) filter. A maximum circuit is connected to the output of the FIR filters and to the input of an infinite impulse response filter. A comparison circuit for comparison to thresholds is connected to the output of the IIR filter. It is thus possible to obtain both a good precision and good filtering of the harmonics of the frequencies of conventional power systems (50 Hz, 60 Hz and 400 Hz), and to reduce the necessary computing power, and consequently the cost of the trip device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile