Patent ID: 7509815

Claim:
A superconducting device, comprising: at least one superconducting appliance with superconductors; a superconducting switch, including a superconducting switching path, formed of superconducting material, electrically connected to the superconductors, and heating means, associated with the superconducting switching path, for controlled changing of the superconducting material of the switching path to a normally conductive state; and a cryosystem with a cryogenic medium, including at least one refrigeration installation cooling the cryogenic medium and having a refrigeration power, a coolant area collecting the cryogenic medium cooling the superconductors of said at least one superconducting appliance, and a pipeline having an open first end connected to the coolant area of the cryogenic medium to access a part of the cooling medium and a closed second end thermally coupled to the superconducting switching path of said superconducting switch, having a constriction with a cross-sectional area such that the refrigeration power transferred by the cryogenic medium located in the coolant area through the cross-sectional constriction is less than the dissipated thermal losses caused on activation of the heating means.