Abstract: The present invention relates to a resistive superconducting current limiter with a meandering shape. This current limiter avoids current density peaks at the turning points (12) or corners of the conductor track (10, 11) in that the central path of the fault current when limiting occurs is artificially increased by appropriate design of the turning points. For this purpose, conductor material is removed in the region of the inner edge of the turning points (13), or the electrical bypass is reinforced at its outer edge (14).

Abstract: The present invention relates to a resistive superconducting current limiter with a meandering shape. This current limiter avoids current density peaks at the turning points (12) or corners of the conductor track (10, 11) in that the central path of the fault current when limiting occurs is artificially increased by appropriate design of the turning points. For this purpose, conductor material is removed in the region of the inner edge of the turning points (13), or the electrical bypass is reinforced at its outer edge (14).

Abstract: Film capacitors have a thin carrier film (1) as dielectric. The surfaces of the carrier films are provided with conductor layers (2)—serving as electrodes—made of metal or made of a nonmetallic conductor. If the capacitor is charged during operation, electric fields with large field strengths can arise at the edges of the conductor layers (2), which can lead to breakdowns. The invention is essentially distinguished by the fact that an edge zone coating (3) is present at the edges of the electrode-forming conductor layer (2), which edge zone coating is only partly charged in the time periods—for example of the alternating-current period—which are critical for changes in the applied voltage. To that end, the edge zone coating of the film must have a surface conductivity which is less than the surface conductivity of the conductor layer.

Abstract: The proposed modular transformer concept is based on a production process in two steps, which separates the fabrication of the turns from the assembly of the transformer, and thus combines automation potential and flexibility. Both the high-voltage winding and the low-voltage winding are composed of effectively two-dimensional spiral conductor tracks (21,22). These conductor tracks can be produced in a computer-aided manner, and then just need to be stacked and electrically connected. Special insulator layers (11,12) are inserted between the conductor tracks and on the one hand bear the weight while on the other hand providing optimum electrical insulation, so that the distances between the high-voltage and low-voltage conductor tracks can be reduced, and the losses in the conductors as well as the short-circuit impedance of the winding can be decreased.

Abstract: The present invention relates to a device for terminating cables (1), particularly for underwater termination of high voltage power cable and for conducting high voltage conductors in an electrical underwater apparatus, with the purpose of providing a liquid and water tight termination, at the same time as it provides pressure relief for vital components.

Abstract: The invention relates to a simplified and cost-effective apparatus for injecting signals into electrical power lines at the high-voltage or medium-voltage level. A coupling unit which is simple to assemble and is protected against direct contact is proposed, in which the connecting cable 9 is integrated in the housing 10 of the coupling capacitor 8. In the region where the conductor 20 passes through the grounded housing 10 of the coupling capacitor 8, the electrical field is reduced by means of the housing wall having a special shape 10a. A smooth field distribution is achieved by suitable rounding of the formed region 10a which is provided for the insertion of the connecting cable 9.

Abstract: A current limiting device including at least one superconductor and at least one nonsuperconducting shunt resistor in parallel with each superconductor. Each superconductor has a first main superconductor face in contact with a main shunt resistor face of a shunt resistor so as to form a compound conductor generally in the form of a meandering band having a band width greater than approximately 3.5 times the superconductor thickness. At least one insulator has opposing faces each in contact with a compound conductor. Multiple compound conductors are arranged such that current flows in opposite directions through adjacent compound conductors.

Abstract: In a device for damping blade vibrations of an axial-flow turbomachine, the ends of the rotating blades form a seal toward the flow-limiting wall of a turbine casing. A ring of permanently magnetic material is attached to this flow-limiting wall of the turbine casing in the radial direction opposite the blade ends, which ring consists of at least one or more sectional rings of the same or different magnetic polarization. The blade ends are each provided with a cover plate which is made of a material which is a good electrical conductor.

Abstract: In order to make it possible to produce superconducting coils with small overall height, they are made from a plurality of coil subunits, optionally with a plurality of layers for each coil subunit, in particular in the case of the low-voltage coil of a transformer. The coil subunits contain as electrical conductor a high-temperature superconductor, around which a fibrous glass is spun and which is embedded in a glass-fiber reinforced epoxy resin or in a plastic. The coil subunits are placed around a transformer core in a cryostat.