| Popis: |
The application of a high-Tc superconductor with a high critical current density (Jc) to a fault current limiter has been investigated. When the superconductor changes to the normal conductor, it has a resistance which can limit fault currents. Experiments were made using a current limiting element of a YBaCuO film 0. 2 5 μ m thick. The element has a current limiting portion with 1mm wide and 2mm long to limit fault currents. For a half cycle, an alternating voltage (10 Vp, 5 0 H z) was applied to the element. A typical current limiting waveform was obtained in the experiment. The fault current, with a crest value of 420A, was limited to the crest value of 8A. After that, the current was rapidly decreased and was less than 1.6A. |
