Abstract An electrically normal conducting impedance winding is connected in series with one of two inductively interlinked windings of a current limiting device and has an inductivity which is such that approximately the same electric voltage drop occurs at the impedance winding as does at the other of the windings when the current limiting device is operated at a current which is smaller than or equal to the limiting current. The series connection of the impedance winding and the one of the windings of the current limiting device is connected in parallel with the other of the windings of the current limiting device. The two windings, one of which is connected in series with the impedance winding and the other of which is connected in parallel with the series connection, have mutually opposed and substantially equal ampere turns. The one of the windings at least partially comprises superconducting material and has a critical field intensity which is exceeded when the limit value of the current is exceeded and the winding becomes electrically normal conducting.
A current limiting device for limiting short circuit current in energy transfer systems, including two inductively interlinked windings with mutually opposed and substantially equal ampere turns, one of which windings at least partially comprising superconducting material and having a critical field intensity which is exceeded when the limit value of the current is exceeded and the winding becomes electrically normal conducting, said current limiting device comprising an electrically normal conducting impedance winding connected in series with said one of said windings and having an inductivity which is such that approximately the same electric voltage drop occurs at said impedance winding as does at the other of said windings when the current limiting device is operated at a current which is smaller than or equal to the limiting current, the other of the windings being connected in parallel with the series connection of the impedance winding and the one of the windings.
Claim 2
Dependent Claim
151 words
A current limiting device for limiting short circuit current in energy transfer systems, including two inductively interlinked windings with mutually opposed and substantially equal ampere turns, one of which windings at least partially comprising superconducting material and having a critical field intensity which is exceeded when the limit value of the current is exceeded and the winding becomes electrically normal conducting, said current limiting device comprising an electrically normal conducting impedance winding connected in series with said one of said windings and having an inductivity which is such that approximately the same electric voltage drop occurs at said impedance winding as does at the other of said windings when the current limiting device is operated at a current which is smaller than or equal to the limiting current, the other of the windings being connected in parallel with the series connection of the impedance winding and the one of the windings.
Claim 3
Dependent Claim
21 words
A current limiting device as claimed in claim 1, wherein said impedance winding hAs a variable inductivity, to enable adjustment thereof.