Abstract: The superconducting current-limiting device contains at least one coil (61), the conductive track of which is formed from at least one band-shaped superconductor (17), where a holding element (2, 41, 10 51, 62) is located between adjacent coil windings. The holding element (2, 41, 51, 62) is constructed wider than the superconductor (17) in the axial direction of the coil (61). The holding element (2, 41, 51, 62) further includes a flat strip (11) and an undulating strip (12, 42, 52). The flat strip (11) extends essentially parallel to the band-shaped superconductor (17) at an essentially constant distance (22) therefrom. The undulating strip (12, 42, 52) extends essentially parallel to the flat strip (11), and in the longitudinal direction periodically has regions (15, 43, 53) distant from and regions (13) close to the flat strip (11). The regions (13) of the undulating strip (12, 42, 52) near to the flat strip have a mechanical connection (21) to the flat strip (11).

Abstract: A strip-shaped superconductor has a conductor structure containing at least one metallic substrate strip, a layer made of oxidic high Tc superconducting material of the AB2Cu3OX type; an oxidic buffer layer, which is arranged therebetween and which has adapted crystalline dimensions, and; a normal-conductive top layer that is applied to the superconductive layer. The buffer layer should be formed so that a transition resistance of no greater than 10?3 ?cm2 is formed at least in partial areas between the superconductive layer and the substrate strip. For example, suitable materials are of the La—Mn—O or Sr—Ru—O or La—Ni—O or In—Sn—O type.

Abstract: The conductive path of the current-limiting device is made of a strip-shaped super conductor, whereby the structure thereof has a metallic strip, at least one oxidic buffer, a type AB2Cu3Ox super conductive layer and a metal cover layer which is arranged thereon. An intrinsically stable bifilar coil is embodied with said super conductor, and a distance is maintained between adjacent coil windings, wherein a distance maintainer is arranged which is transparent to the coolant.

Abstract: A superconductor has a conductive path with a metallic substrate strip, a super-conductive layer made of a AB2CU3Ox type high-Tc-super conductive material, at least one insulating buffer layer which is arranged therebetween, and a metallic cover layer which is arranged thereon. At least one contacting element made of a normal conductive contacting material and arranged at least on one longitudinal side of the structure between the cover layer and the substrate strip enables a predetermined normally conductive limitation of the current-limiting device to be obtained.

Abstract: The resistive current limiter contains an electrically insulating support body and at least one conductor track structure arranged thereon and having a conductor track made of high-Tc superconductor material. The conductor track has straight and curved conductor track segments. A maximum radii ratio v of 7 (v=ra/ri where ra=external radius, ri=internal radius) is to be maintained for the curved conductor track segments. The conductor track is advantageously patterned from a layer which is made of the high-Tc superconductor material and is applied on the support body.

Abstract: An apparatus for delivering current to a cooled electrical device. The apparatus includes at least one electrical line having a first end at a first temperature and a second end at a second temperature being lower than the first temperature. The second end is provided for connection to the cooled electrical device to deliver current to the cooled electrical device. The cooled electrical device is preferable a superconducting device. At least a portion of the electrical line includes a part of a cold head. The part of the cold head is preferably a regenerator or a pulse tube of a pulse tube cooler.