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:
Nov. 15, 1977
Filed:
May. 04, 1976
Erich Siegfried Friedlander, Birmingham, EN;
Associated Electrical Industries Limited, London, EN;
Abstract
A saturated reactor of the type, for example the treble-tripler reactor, in which groups of 3-phase windings are connected in series to produce multiple flux phases in respective core limbs to achieve harmonic compensation. The windings are connected between the line terminals and a star-point which cannot normally be earthed if large 3rd harmonic components are to be avoided. In this invention the zero-sequence impedance of the reactor is kept at a low value by duplicating the complete primary winding and connecting the two duplicates in zig-zag star. The resulting star point can then be earthed without upsetting the harmonic compensation of the reactor.