Claims
- 1. A method of controlling fault current in a transformer, comprising:inducing current in a first winding through a first magnetic circuit magnetically coupled to a primary winding; and inducing current in a second winding, in series opposition to the current generated in the first winding, through a second magnetic circuit magnetically coupled to the primary winding, where the second magnetic circuit includes a closed circuit fault current winding, wherein the current in the second winding is increased, when current induced in the fault current winding exceeds a critical current.
- 2. The method of controlling fault current of claim 1, further comprising:generating an output current based on the current in the first and second windings and the fault current winding.
- 3. The method of controlling fault current of claim 1, wherein the fault current winding is a superconductor.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9819058 |
Sep 1998 |
GB |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a Divisional of application Ser. No. 09/379,607, filed Aug. 24, 1999, now U.S. Pat. No. 6,300,856.
US Referenced Citations (10)
Foreign Referenced Citations (4)
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Date |
Country |
1638516 |
Aug 1971 |
DE |
0273171 |
Jul 1998 |
EP |
268666 |
Jul 1993 |
FR |
2 321 137 |
Jul 1998 |
GB |