Patent ID: 7825763
Filing Date: 2010-11-02
Classification: G01R,H01F

Abstract:
1. A current transformer comprising at least two partial circuits (CB 1 , CB 2 , . . . , CB n , . . . , CB N ) each comprising a Rogowski type winding (C 1 , C 2 , . . . , C n , . . . , C N ), each of said partial circuits being made in the form of an angular portion of a complete circuit (CB) which surrounds at least one primary conductor ( 10 , 10 A, 10 B, 10 C) of the transformer over 360°, said complete circuit having the function of a Rogowski type secondary circuit for the transformer, the winding (C n ) of each partial circuit (CB n ) comprising a go winding (C n0 ) electrically connected to a return winding (C n1 ), said go and return windings being arranged in an interleaved pattern over a significant portion of an angular extent (θ n ) of the partial circuit (CB n ) but substantially less than an entire angular extent of the complete circuit (CB), wherein, for each partial circuit (CB wherein, for each partial circuit (CB