Tests of 100 kW high-T sub(c) superconducting fault current limiter
An inductive superconducting fault current limiter has been built and tested. It mainly consists of a copper coil, a superconducting tube, and an iron core which are concentrically arranged. The device is essentially a transformer with the secondary winding being the tube. The tube has a diameter of...
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Published in | IEEE transactions on applied superconductivity Vol. 5; no. 2; pp. 1059 - 1062 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
01.01.1995
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Online Access | Get full text |
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Summary: | An inductive superconducting fault current limiter has been built and tested. It mainly consists of a copper coil, a superconducting tube, and an iron core which are concentrically arranged. The device is essentially a transformer with the secondary winding being the tube. The tube has a diameter of 20 cm, a height of 35 cm, and is made of Bi2212 ceramic, fabricated by partial melting. The ceramic has the voltage current characteristic V approx. I super( alpha ) with alpha approximately 5. The critical current density defined by the 1 mu V/cm criterion is about 1400 A/cm super(2). Depending on the number of turns of the coil, the nominal current of the device was between 130 A and 250 A. In short circuit tests in a 480 V circuit, the prospective fault current of 8 kA was limited to about 5 times the nominal current. The test results are in good agreement with detailed simulations of both the normal operation (e.g. impedance, AC-losses) and the behaviour under fault conditions (i.e. evolution of the current). |
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Bibliography: | SourceType-Scholarly Journals-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Feature-2 ObjectType-Article-3 |
ISSN: | 1051-8223 |