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:
Jul. 21, 2015
Filed:
Aug. 24, 2012
Sebastian Pedro Rosado, Munich, DE;
Tiziana Bertoncelli, Munich, DE;
Piniwan Thiwanka Bandara Wijekoon, Munich, DE;
Ara Panosyan, Munich, DE;
Manoj Ramprasad Shah, Latham, NY (US);
Paolo Soldi, Munich, DE;
Sebastian Pedro Rosado, Munich, DE;
Tiziana Bertoncelli, Munich, DE;
Piniwan Thiwanka Bandara Wijekoon, Munich, DE;
Ara Panosyan, Munich, DE;
Manoj Ramprasad Shah, Latham, NY (US);
Paolo Soldi, Munich, DE;
General Electric Company, Niskayuna, NY (US);
Abstract
A load tap changer includes a mechanical switch, a semiconductor switch and an impedance branch or an uncontrolled semiconductor switch. The mechanical switch is connected to a power terminal of a voltage conversion device to carry an electric current and is activated to switch from a first tap to a second tap of the voltage conversion device when a tap change signal is received. The semiconductor switch is then connected between the first tap and the power terminal of the voltage conversion device and is disconnected before the mechanical switch is connected to the second tap. The impedance branch or the uncontrolled semiconductor switch is connected between the second tap and the power terminal of the voltage conversion device before the mechanical switch is connected to the second tap. The impedance or the uncontrolled semiconductor switch is disconnected after the mechanical switch is connected to the second tap.