| 摘要 |
PURPOSE:To increase current-limiting effect, by fitting superconducting material exceeding no critical temperature with rated current, in a current circuit, and by transferring the superconducting material in a normal conduction state at the time of overloading, to increase a resistance value and limit current. CONSTITUTION:In a cylindrical case 4 made of iron material, an insulation 5 is formed, and in its internal section, superconducting materials 1A, 1B are placed between silver electrodes 2A-2C. Both the ends of the case 4 are covered with insulating covers 6A, 6B, and via bushings 7A, 7B, lead wires 9A, 9B and 8A, 8B are connected to the electrodes 2A, 2C, and the electrodes 2A, 2C are retained by springs 3A, 3B. When excess current flows, then the superconducting materials are transferred in a normal conduction state. As a result, the excess current is suppressed, and an external section is not influenced by a magnetic field, and a device is not influenced by the magnetic field from the external section, and the superconducting materials are prevented from being damaged. |
