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:
Jun. 09, 2009
Filed:
Oct. 23, 2006
Bang-wook Lee, Cheongju, KR;
Kwon-bae Park, Daejeon, KR;
Bang-Wook Lee, Cheongju, KR;
Kwon-Bae Park, Daejeon, KR;
LS Industrial Systems Co., Ltd., Seoul, KR;
Abstract
An electric power circuit protecting apparatus using a superconductor in an electric power system needing re-closing within a predetermined time from fault current blocking, comprising a main circuit breaker; a first superconductor element connected in series to the main circuit breaker; a first auxiliary switch to switch a circuit between the first superconductor element and the main circuit breaker; a second superconductor element connected in parallel to the first superconductor element and the first auxiliary switch; a second auxiliary switch to switch a circuit between the second superconductor element and the main circuit breaker; a first monitoring unit for detecting a voltage across the first superconductor element and for supplying a first switching control signal to the first auxiliary switch to be switched to the circuit open position, and a second switching control signal to the second auxiliary switch to be switched to the circuit close position; and a second monitoring unit for detecting a voltage across the second superconductor element, the second monitoring unit for supplying a second switching control signal to the second auxiliary switch to be switched to the circuit open position, and a first switching control signal to the first auxiliary switch to be switched to the circuit close position.