Abstract: The superconducting magnetic system comprises a superconducting sectionalized coil. Each section of the coil has a series-connected disconnector with a controlled shunt of superconducting material and normal zone detection unit connected in parallel to the coil section and its disconnector. Said coil is linked inductively with an energy removal device. The latter comprises a heat-insulated compartment cooled to cryogenic temperature. The compartment contains the disconnectors and at least one coil of normal metal and a jumper of superconducting material making up a closed electric circuit. Each controlled shunt and jumper is fitted with a control winding. The control windings of the shunts are linked electrically with the respective normal zone detection unit. The control winding of the jumper is linked electrically with each normal zone detection unit.

Abstract: A multisection superconducting cable for carrying alternating current and comprising a heat insulation envelope, a superconductive shield with a stabilizing substrate and an electrical portion for carrying an electrical current and including at least one conductor assembly of two coaxial cores, one of which cores is made tubular and provided with a superconductive layer and a stabilizing substrate, another core running inside said tubular core. The stabilizing substrates of each section of the electrical portion and of the shield are formed by local segments of a stabilizing material which segments are separated by a material of a lower electrical conductivity than the stabilizing material, the resistance of the stabilizing substrates within each section being in excess of the impedance of the electrical portion of this section.

Abstract: A cooled multiphase ac cable comprising a means for protecting the cable against the effect of the axial magnetic flux, made of a superconducting material in the form of a plurality of closed conductors separately embracing the surfaces of the internal and external layers of stabilized superconducting material of the cable phases. The closed conductors embracing the surface of the external layer of stabilized superconducting material are electrically associated. The proposed multiphase cable is simple in manufacture, reliable in service and adequately protected against the effect of the axial magnetic flux.