H - Electricity – 01 – L
Patent
H - Electricity
01
L
H01L 39/02 (2006.01) H01L 39/16 (2006.01) H01L 39/24 (2006.01) H02H 9/02 (2006.01)
Patent
CA 2251488
Layered ceramic high-temperature superconductors which are intended to be used as current limiters in alternating-current lines should have a bypass layer whose electrical resistivity is increased by more than 10 times with respect to that of the pure noble-metal bypass layer. Preferably, a base-metal bypass layer of steel whose electrical resistivity is in the range between 10 µ.OMEGA.2 × cm and 100 µ.OMEGA. × cm at 77 K is soldered on or bonded to the superconductor layer. For electrical and thermal reasons, it is essential that the sheet resistance .rho.3/d3 of the base-metal bypass layer satisfies the following equation: (see formula I)
Chen Makan
Lakner Martin
Paul Willi
Abb Research Ltd.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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