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.

Date of Patent:
May. 27, 1986

Filed:

Dec. 17, 1984
Applicant:
Inventors:

Shan C Sun, Coral Springs, FL (US);

James P McGivern, Plum Boro, PA (US);

Assignee:

Westinghouse Electric Corp., Pittsburgh, PA (US);

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 68 ; 361 78 ; 361 66 ; 455135 ; 455136 ;
Abstract

A signal quality monitor, and a protective relay system using the monitor, which utilizes both AC and DC signals from the receiver agc stage to monitor a plurality of different signal parameters. A signal responsive to the noise in the communication channel which transmits at least one of the protective relay signals used in a protective relay comparison function, is also used in the trip circuits of the associated circuit interrupter to continuously adapt or modify the trip level in response to channel noise.


Find Patent Forward Citations

Sun, Shan. (1986). Signal quality monitor for protective relay system (U.S. Patent No. 4591940). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4591940

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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