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. 05, 2006
Filed:
Dec. 17, 2004
Federico Gamba, Bergamo, IT;
Severino Colombo, Dalmine, IT;
Francesco Casalinuovo, Cavernago, IT;
ABB Service S.R.L., , IT;
Abstract
A supply device () for an electronic protection device to be used in a low-voltage circuit breaker. The supply device basically comprises a primary conductor (), a secondary winding (), a first magnetic circuit (), and at least one second magnetic circuit (). The first magnetic circuit () is such as to surround said primary conductor (), which is related to a phase protected by the protection device; at the same time, the first magnetic circuit () constitutes the core of said secondary winding () that is used for supply of the protection device. The second magnetic circuit () is structurally separated from the first magnetic circuit (), but is operatively connected thereto for subtracting part of the first magnetic flux generated within it by the current circulating in the primary conductor ().