Electricity: conductors and insulators – Conduits – cables or conductors – Superconductors
Reexamination Certificate
2004-09-09
2009-10-06
Norris, Jeremy C (Department: 2841)
Electricity: conductors and insulators
Conduits, cables or conductors
Superconductors
C505S230000
Reexamination Certificate
active
07598458
ABSTRACT:
A superconducting cable according to the present invention includes a former, a superconducting conductor layer formed around the outer circumference of the former, an electric insulating layer formed around the outer circumference of the conductor layer, a shield layer formed around the outer circumferential of the insulating layer, and a normal-conducting metal layer formed between the insulating layer and the shield layer. The normal-conducting metal layer existing inside shield layer has an inductance greater than that of the shield layer, which can suppress a rise in temperature in the event of accidents such as short-circuits, and also can reduce AC losses since currents flow through shield layer during the passage of normal currents.
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Nishimura Masanobu
Yumura Hiroyasu
Foley & Lardner LLP
Norris Jeremy C
Sumitomo Electric Industries Ltd.
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