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:
Oct. 22, 2013
Filed:
Jan. 27, 2011
Keisuke Udagawa, Urayasu, JP;
Tadashi Koshizuka, Saitama, JP;
Shiro Maruyama, Yokohama, JP;
Minoru Saito, Kamakura, JP;
Noriyuki Nagayama, Tokorozawa, JP;
Keisuke Udagawa, Urayasu, JP;
Tadashi Koshizuka, Saitama, JP;
Shiro Maruyama, Yokohama, JP;
Minoru Saito, Kamakura, JP;
Noriyuki Nagayama, Tokorozawa, JP;
Kabushiki Kaisha Toshiba, , JP;
Abstract
Inrush current suppression apparatus for suppressing a transformer inrush current including a transformer side voltage measurement unit which measures a voltage at a side of a transformer, a residual magnetic flux calculation unit which calculates three line-to-line residual magnetic fluxes, a power supply side voltage measurement unit which measures a voltage at a side of a power supply, a stable-state magnetic flux calculation unit which calculates three line-to-line stable-state magnetic fluxes, based on the voltage at the side of the power supply, a phase determination unit which determines a phase in which phases of the three line-to-line stable-state magnetic fluxes are respectively the same in polarity as phases of the three line-to-line residual magnetic fluxes, and a closing unit which closes the circuit breaker in the phase determined by the phase determination unit.