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:
Sep. 19, 2006
Filed:
Dec. 17, 2002
Gilles Baurand, Montesson la Borde, FR;
Jean-christophe Cuny, Malakoff, FR;
Stephane Delbaere, Paris, FR;
Gilles Baurand, Montesson la Borde, FR;
Jean-Christophe Cuny, Malakoff, FR;
Stephane Delbaere, Paris, FR;
Schneider Electric Industries SAS, Rueil-Malmaison, FR;
Abstract
In a switching device, a method and device for determining the wear of the pole contacts (C, C, C) actuated by an electromagnet () whose movement is controlled by an excitation coil () by the variation of a contact wear distance travel time (Tu) generated during an electromagnet closing movement, by measuring at least one electrical signal (Ip) representing the conducting state of at least one power pole, by measuring an excitation current (Is) passing through the coil () of the electromagnet and by comparing the electrical signal (Ip) and the excitation current (Is) as a function of time. The measured wear distance travel time (Tu) can then be compared with an initial travel time (Ti) stored in the switching device.