Patent ID: 7879762

Claim:
A resistive superconducting current-limiting apparatus with a conductor track, comprising: a substrate strip formed of a normally conductive substrate metal; a superconducting layer formed of an oxidic high-T c superconductor material of AB 2 Cu 3 O x where A represents at least one element selected from the group consisting of yttrium and other rare earth metals, and B represents at least one alkaline earth metal; at least one buffer layer, arranged between said substrate strip and said superconducting layer, formed of an insulating oxidic buffer material; and a covering layer, applied to said superconducting layer and formed of a normally conductive covering metal; and at least one contact-making element formed of a normally conductive material on at least one longitudinal side of said apparatus between said covering layer and said substrate strip so as not to completely cover either the covering layer or the substrate strip; and having a relationship in a normally conductive limiting state of the current-limiter device defined by R k >3·R L , where R L is a first electrical resistance of said apparatus without the at least one contact-making element over an entire length of the conductor track, and R K is a second electrical resistance of the at least one contact-making element over the entire length of the conductor track.