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    CURRENT TRANSFORMER FOR LOW VOLTAGE RESIDUAL CURRENT CIRCUIT BREAKERS
    1.
    发明公开
    CURRENT TRANSFORMER FOR LOW VOLTAGE RESIDUAL CURRENT CIRCUIT BREAKERS 有权
    电流互感器的低电压故障断路器

    公开(公告)号：EP3058576A1

    公开(公告)日：2016-08-24

    申请号：EP14795967.0

    申请日：2014-10-14

    申请人： ABB S.p.A.

    发明人： ANTONELLO, Paolo ,  COLOMBO, Franco

    IPC分类号： H01F27/28 ,  H01F38/28

    CPC分类号： H01F38/30 ,  H01F38/32 ,  H01F2038/305

    摘要： A current transformer (1) for low voltage residual current circuit breakers characterized in that it comprises: - a first magnetic core (2); - primary winding means comprising one or more primary conductors (31, 32, 33, 34) passing through said first magnetic core; - secondary winding means comprising one or more first secondary conductors (42) passing through said first magnetic core; - first electric contacts (51, 52, 53, 54) and second electric contacts (61, 62, 63, 64) for connection of said primary conductors to one or more further conductors. The primary conductors (31, 32, 33, 34) are formed by conductive bars each having a first shaped end (311, 321, 331, 341) and a second shaped end (312, 322, 332, 342). The current transformer comprises a first printed circuit (5) comprising one or more first conductive pads (51, 52, 53, 54) arranged to form the first electric contacts of said current transformer. Each of said conductive bars has the first shaped end (311, 321, 331, 341) fixed to said first printed circuit at a respective first conductive pad (51, 52, 53, 54) of said first printed circuit so as to be mechanically supported by said first printed circuit and be electrically connected to said first conductive pad.