公开(公告)号：JP2000354326A

公开(公告)日：2000-12-19

申请号：JP2000133141

申请日：2000-05-02

Applicant: ABB RESEARCH LTD

Inventor： ZUEGER HARRY ,  BONMANN DEITRICH ,  PAUL WILLI

IPC: H01F6/04 ,  H01F36/00 ,  H02H7/00 ,  H02H9/02

Abstract: PROBLEM TO BE SOLVED: To obtain a current-limiting device capable of continuing to supply electric power to a load, even if a short circuit occurs. SOLUTION: In a current-limiting device based on a superconducting transformer 30, electric power can be supplied to a load 21 without interruption by providing an auxiliary winding 14 parallel to the superconducting primary winding 12 of the transformer 30. The auxiliary winding 14 carries an excess current if a short circuit occurs, thereby enabling the primary winding 12 heated by this current-limiting device to be cooled. The instant the short circuit is removed, the primary winding is made capable of carrying a rated current again without loss. The auxiliary winding 14 made of a normal conducting material has additional stray impedance.