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:
Apr. 04, 1989
Filed:
Nov. 12, 1987
Stanley B Wilkinson, Havertown, PA (US);
General Electric Company, King of Prussia, PA (US);
Abstract
A phase selector for identifying a faulted phase in a three-phase alternating current electrical current distribution system generates, for each of the three phases, an output signal which includes the phasor sum of a signal related to a fault component of current flowing in the phase, a signal related to a negative sequence component of current flowing in the phase and a signal related to a zero sequence component of current flowing in the phase. The phase selector also generates at least one restraint signal which includes the phasor sum of a signal related to a fault component of current flowing in one of the two other phases of the three phase power distribution system, a signal related to a fault component of current flowing in the other of the two other phases of the three phase electrical power distribution system and a signal related to the negative sequence component of current flowing in the phase. A net operate signal is generated when the magnitude of the operate signal exceeds the magnitude of the restraint signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile