Device for measuring alternate current and/or direct current
    1.
    发明公开
    Device for measuring alternate current and/or direct current 有权
    对于AC和/或DC测量装置

    公开(公告)号:EP1610133A3

    公开(公告)日:2006-05-31

    申请号:EP05105026.8

    申请日:2005-06-08

    申请人: ABB Service S.r.l

    IPC分类号: G01R15/18

    CPC分类号: G01R15/185

    摘要: The present invention is related to a device (1) for the detection of direct and/or alternating current to be used in the realisation of highly sensitive amperometric measuring instruments or for the detection of differential faults along with automatic switches. The inventive device comprises a magnetic core (5) disposed in such a manner to surround at least one current-carrying conductor (6). A winding (10) surrounds the magnetic core (5) and is electrically connected to an electrical resistance (60). A voltage source (40) generates a drive voltage (Vexcit) which permits the circulation of a pick-up current (Iexcit) in the said winding (10) and in the said core (5). Amplification means (20) are used to detect the voltage (Vsense) at the terminals of the resistance (60) in order to generate a first signal (Vampl) which is representative of the above defined current (lexcit). The inventive device (1) also comprises a feedback adjustment circuit block (70) which acquires the first input signal (Vampl) in order to generate a second signal which inverts the said drive voltage (Vexcit) when the pick-up current (Iexcit) reaches preset values.

    Device for measuring alternate current and/or direct current
    2.
    发明公开
    Device for measuring alternate current and/or direct current 有权
    MessvorrichtungfürWechselstrom und / oder Gleichstrom

    公开(公告)号:EP1610133A2

    公开(公告)日:2005-12-28

    申请号:EP05105026.8

    申请日:2005-06-08

    申请人: ABB Service S.r.l

    IPC分类号: G01R15/18

    CPC分类号: G01R15/185

    摘要: The present invention is related to a device (1) for the detection of direct and/or alternating current to be used in the realisation of highly sensitive amperometric measuring instruments or for the detection of differential faults along with automatic switches. The inventive device comprises a magnetic core (5) disposed in such a manner to surround at least one current-carrying conductor (6). A winding (10) surrounds the magnetic core (5) and is electrically connected to an electrical resistance (60). A voltage source (40) generates a drive voltage (Vexcit) which permits the circulation of a pick-up current (Iexcit) in the said winding (10) and in the said core (5). Amplification means (20) are used to detect the voltage (Vsense) at the terminals of the resistance (60) in order to generate a first signal (Vampl) which is representative of the above defined current (lexcit). The inventive device (1) also comprises a feedback adjustment circuit block (70) which acquires the first input signal (Vampl) in order to generate a second signal which inverts the said drive voltage (Vexcit) when the pick-up current (Iexcit) reaches preset values.

    摘要翻译: 本发明涉及一种用于检测用于实现高灵敏度电流测量仪器的直流和/或交流电流的装置(1),或与自动开关一起检测差动故障。 本发明的装置包括以围绕至少一个载流导体(6)的方式设置的磁芯(5)。 绕组(10)围绕磁芯(5)并与电阻(60)电连接。 电压源(40)产生驱动电压(Vexcit),其允许在所述绕组(10)和所述芯(5)中循环拾取电流(Iexcit)。 放大装置(20)用于检测电阻(60)的端子处的电压(Vsense),以产生代表上述限定电流(lexcit)的第一信号(Vampl)。 本发明的装置(1)还包括反馈调整电路块(70),其获取第一输入信号(Vampl),以便当拾取电流(Iexcit)(Iexcit))产生使所述驱动电压(Vexcit)反转时的第二信号, 达到预设值。