Resistive current limiter and process for producing it

Details Resistive current limiter and process for producing it Resistive current limiter and process for producing it

1992-06-04

1993-07-27

Lateef, Marvin M.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 32S, 361 19, 505 1, H01C 710, H01L 3900

Patent

active

052313697

ABSTRACT:
A resistive current limiter takes the form of a hollow cylinder and is composed of high-temperature superconducting material. In this connection, the high-temperature superconducting material may be a polynary oxide.
To produce said resistive current limiter, a homogeneous melt is prepared from an oxide mixture, suitable for forming high-temperature superconductors, in a specified stoichiometry and said melt is allowed to run, at temperatures above 900.degree. C., into a casting zone which rotates about its horizontal axis. The molding, solidified as a cylinder, is removed from the casting zone. The cylinder is sawn so as to produce a gap extending parallel to its axis. Furthermore, a multiplicity of slits are sawn into the cylinder parallel to the gap. Finally, the cylinder is heat-treated for up to 150 hours at 700.degree. to 900.degree. C. in an oxygen-containing atmosphere.

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von Miller, R., Lexikon der Energietechnik und Kraftmaschinen 6:570 (1965).
Buckel, W., "7.2 Kristische Strome in harten Supraleitern" In Supraleitung, Germany, Grundlagen und Anwendungen, 1984, pp. 172-173.
Patent Abstracts of Japan, vol. 13, No. 483, Nov. 1989.

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