公开(公告)号：DE19808025A1

公开(公告)日：1999-09-02

申请号：DE19808025

申请日：1998-02-26

Applicant: ABB RESEARCH LTD

Inventor： FRIED REINHARD ,  SKINDHOJ JORGEN ,  VEENSTRA MARTIN ,  ETTER PETER

IPC: H01C1/084 ,  H01C1/14 ,  H01C7/02 ,  H02H9/02

公开(公告)号：DE19648381A1

公开(公告)日：1998-06-04

申请号：DE19648381

申请日：1996-11-22

Applicant: ABB RESEARCH LTD

Inventor： STUCK ALEXANDER DR ,  VEENSTRA MARTIN

IPC: H01F38/02 ,  H02H9/02

Abstract: The arrangement includes at least one inductive resistance (1, 2) which increases its resistance value suddenly when reaching a pre-settable current limit. The at least one inductive resistance comprises a coil (1-4) with a core (4) from a hard-magnetic material, whose relative permeability increases suddenly at overstepping of a pre-settable current limit, according to a magnetic field intensity limit. The hard-magnetic material is preferably a hard ferrite, a neodym-iron-boron alloy, a samarium-cobalt alloy, an aluminum-nickel-cobalt alloy, a selenium-cobalt alloy, an iron-cobalt-vanadium alloy, and/or an alloy of cobalt with at least one rear earth metal.