| 摘要 |
Inductive current limitation device for an alternating current consisting of an induction coil (2) comprising at least one winding and through which current flows, a body (3) which is arranged concentrically to the latter and is of central symmetrical form, hollow in the interior, made of a high-temperature ceramic superconductor and a concentrically arranged core (4) made of a soft magnetic material of high permeability located in the interior of this body (3). During normal operation (rated current), the superconductivity of the body (3) is effective and the impedance of the induction coil (2) is very low. In the case of overcurrent (mains short-circuit), the superconductivity disappears and the impedance of the induction coil (2) achieves its maximum, current-limiting value. <IMAGE>
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