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    • 4. 发明申请
    • CURRENT TRANSFORMER
    • 电流互感器
    • WO2012101421A2
    • 2012-08-02
    • PCT/GB2012/050073
    • 2012-01-13
    • RAYLEIGH INSTRUMENTS LIMITEDBROOKES, Matthew
    • BROOKES, Matthew
    • G01R19/15H01F38/30H01F38/32H01F38/38
    • H01F27/40G01M1/00G01R1/00G01R15/185G01R19/0092H01F38/30H01F38/32H01F38/38H02M1/00
    • A current transformer is described which comprises a housing having one or more apertures, each for receiving a primary cable or busbar, one or more magnetic cores enclosed within the housing and being positioned proximate to respective ones of the apertures so that a magnetic field is produced in a magnetic core when a primary current flows through a primary cable or busbar received through the respective aperture, and one or more secondary windings enclosed within the housing, each secondary winding being wrapped around at least a portion of a respective magnetic core so that a secondary current is induced in a secondary winding when a magnetic field is produced in the respective magnetic core. Shunt circuitry is enclosed within the housing and is connected across the secondary windings to generate a respective voltage signal for each secondary winding. A connector socket is integrally mounted to the housing for outputting the voltage signals. In this way, the labour costs incurred during installation of the current transformer can be reduced, a risk of wiring errors can be avoided, and a risk of electrocution from secondary terminals being left open-circuit is removed.
    • 描述了一种电流互感器,其包括具有一个或多个孔的外壳,每个孔用于接收主电缆或母线,一个或多个封装在外壳内的磁芯,并且定位成邻近 以使得当初级电流流经通过相应孔接收的主电缆或母线时在磁芯中产生磁场,以及封闭在外壳内的一个或多个次级绕组,每个次级绕组围绕至少一部分 当在相应的磁芯中产生磁场时,在次级绕组中感应次级电流。 分流电路被封闭在外壳内并跨过次级绕组连接,以为每个次级绕组产生相应的电压信号。 连接器插座一体地安装到壳体上用于输出电压信号。 通过这种方式,可以减少电流互感器安装过程中产生的人工成本,避免接线错误的风险,并且可以消除次级端子触电死亡的风险。