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:
Dec. 23, 2003
Filed:
Dec. 28, 2000
Applicant:
Inventors:
Carl J. LaPlace, Raleigh, NC (US);
David G. Hart, Raleigh, NC (US);
William M. Egolf, Apex, NC (US);
Graeme N. McClure, Highett Victoria, AU;
Assignee:
ABB Technology AG, Zurich, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/42 ;
U.S. Cl.
CPC ...
H02H 3/42 ;
Abstract
A three phase trip of a power line is prevented in a power distribution network delivering electrical power through multiple current carrying conductors and a neutral/ground line. The three phase trip is prevented after a change in the current in the neutral/ground line caused by a partial trip of a recloser. A partial trip is detected in the power distribution network, and then a threshold current is automatically adjusted from a first level to a second level for the neutral/ground line.