Superconductor current-limiting apparatus
Patent 5250508 Issued on October 5, 1993. Estimated Expiration Date: 
September 16, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 16, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3617807 3629690 3703664 3736439 Superconducting transformer Device for inductive current limiting of an alternating current employing the superconductivity of a ceramic high-temperature superconductor Patent #: 5140290 InventorAssigneeApplicationNo. 760315 filed on 09/16/1991US Classes:505/211, Electrical energy storage device (e.g., accumulator, etc.), inductor, transformer, magnetic switch, magnetic ring, sphere, coil, or magnetic arrangement323/360, Superconductive361/19, Superconductor protective circuits361/58, Impedance insertion505/163, Significant cryogenic refrigeration system having superconductor component as part of the system or having superconductor device or material to be cooled present therewith (e.g., Peltier effect device, etc.)505/850, Protective circuit: (Class 361/19)505/881Resistance device responsive to magnetic field: (Class 338/32S)ExaminersPrimary: DeBoer, Todd E.Attorney, Agent or FirmForeign Patent References
International ClassH02H 009/02Foreign Application Priority Data1990-09-14 FRAbstractThe invention relates to superconductor current-limiting apparatus of the type having a magnetic core around which firstly a superconductor component is disposed, followed by an electric coil made of non-superconducting material, the apparatus being designed to be inserted in a line to be protected (L), the assembly constituted by the magnetic core (6A, 6B), the superconductor component (3A, 3B) and the electric coil (2A, 2B) forming a current-limiting unit which is connected in the line to be protected in series with a circuit-breaker. The apparatus has two current-limiting units contained in a single tank (13) filled with a dielectric cooling fluid (17), each superconductor component being disposed in an insulating cryostat (4A, 4B) filled with a cryogenic fluid, each magnetic core being part of a closed magnetic circuit, the tank having electrical bushings (14, 15, 16) for connecting the electric coils to the line to be protected via circuit-breakers (30A, 30B), the limiting units being assembled in parallel. | |
