Electricity: electrical systems and devices – Safety and protection of systems and devices – Superconductor protective circuits
Reexamination Certificate
2006-10-23
2009-06-09
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Superconductor protective circuits
Reexamination Certificate
active
07545611
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.
REFERENCES:
patent: 4467384 (1984-08-01), Yuasa
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patent: 64-012438 (1989-01-01), None
patent: 1-185127 (1989-07-01), None
patent: 2000-294068 (2000-10-01), None
Translation of JP 2000-294068. Morita et al. Oct. 2000.
English language abstract of JP 2000-294068.
English language abstract of JP 64-012438.
U.S. Appl. No. 11/427,816 to Lee et al., which was filed on Jun. 30, 2006.
U.S. Appl. No. 11/616,458 to Lee et al., which was filed on Dec. 27, 2006.
English language Abstract of JP 1-185127 A Jul. 24, 1989.
Lee Bang-Wook
Park Kwon-Bae
Clark Christopher J
Greenblum & Bernstein P.L.C.
Jackson Stephen W
LS Industrial Systems Co., Ltd.
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