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:
Oct. 24, 1989
Filed:
Nov. 04, 1988
William R Wolfe, Penn Hills, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A composite circuit breaker includes a plurality of circuit breaker modules inserted in paralleled branches of the main conductor. The branch phase currents associated with each breaker module and a signal representative of the total currents in the main conductor are auctioneered to select the largest of the current for application to the trip circuit of the breaker to provide protection for the individual breakers against current hogging while composite protection is provided for the load/source. The signal representative of each phase of the total current is generated by a primary current transformer which feeds series connected auxiliary current transformers each of which is associated with one of the individual breakers.