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:
Mar. 25, 2014
Filed:
Apr. 30, 2009
Vladimir Anatolievich Zhukov, Moscow, RU;
Valery Mihailovich Pupin, Moscow, RU;
Vladimir Anatolievich Zhukov, Moscow, RU;
Valery Mihailovich Pupin, Moscow, RU;
Other;
Abstract
A method and device for automatic activation of a backup supply is provided that measures the positive-phase-sequence voltage of the busbars in a backup power source, the linear voltages at the busbars in the primary power source and the angle between the vectors of the positive-phase-sequence voltages of the busbars in both power sources. The method and device also measures the value of the rms current in a phase and the value of the angle between the vector of the complex rms current in the same phase and of the vectorial sum of the complex rms voltage between the two other phases at the busbars in the primary power source and the received portion. The power supply to the busbars is switched from the primary source to the backup source in the event of any of the above-mentioned magnitudes departing from the range of permissible values for these magnitudes.