Title: Electric power circuit protecting apparatus using superconductor
Application Number: 200610143204 Application Date: 2006.10.30
Publication Number: 1976157 Publication Date: 2007.06.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02H3/08;H02H3/06;H02H9/02
Applicant(s) Name: LS Ind Systems Co., Ltd. Address:
Inventor(s) Name: Lee Bang-wook;Park Kwon-bae
Attorney & Agent: litao zhongqiang
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.
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