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    • 1. 发明授权
    • Voltage measuring device for encapsulated high-voltage installations
    • 封装高压设备电压测量装置
    • US3938039A
    • 1976-02-10
    • US495839
    • 1974-08-08
    • Wolfgang HermsteinGerhard RosenbergerWilli Muller
    • Wolfgang HermsteinGerhard RosenbergerWilli Muller
    • G01R15/24H01F38/20H01F38/38G01R31/00
    • G01R15/241
    • A voltage measuring device is described which is suitable for application to encapsulated, high-voltage switching installations which include an inner conductor surrounded by a grounded metallic outer tube. The device utilizes the fact that an electric field exists between the inner conductor and metallic outer tube. It includes means for widening a portion of the outer tube to thereby form a space for locating certain portions of the measuring device. The device itself includes an electro-optical component, such as a Kerr or Pockels cell which is positioned in the space defined by the widening means, at a distance from the inner conductor which is approximately equal to the distance that the outer tube is located from said inner conductor. A metal layer is positioned on that side of the electro-optical component which is away from the inner conductor. The metal layer is electrically connected to the grounded, metallic outer tube. The presence of the layer insures that the lines of the electric field between the inner conductor and the outer tube are directed through the electrooptical component, perpendicular to the metal layer. A source of polarized light is directed towards said electro-optical component. As the light passes through the cell the plane of polarization of the light is rotated as a function of the electric field intensity. Thus the exiting light becomes a measure of the voltage between the inner conductor and the outer tube. The shifted, polarized light exiting from the electro-optical component is then processed by an optical evaluation device which produces an electrical output proportional to the amount of shift of the plane of polarization of the light.
    • 描述了适用于封装的高压开关装置的电压测量装置,其包括被接地的金属外管包围的内导体。 该装置利用在内导体和金属外管之间存在电场的事实。 它包括用于加宽外管的一部分从而形成用于定位测量装置的某些部分的空间的装置。 该装置本身包括诸如克尔或普克尔斯电池的电光部件,该电光学部件定位在由加宽装置限定的空间中,距离内导体一定距离,该距离大约等于外管所处的距离 内导体。 金属层位于远离内部导体的电光部件的该侧。 金属层电连接到接地的金属外管。 层的存在确保内导体和外管之间的电场线垂直于金属层引导通过电光部件。 偏振光源指向所述电光部件。 当光通过电池时,光的偏振平面作为电场强度的函数旋转。 因此,出射光成为内部导体和外部管之间的电压的量度。 然后从光电部件出射的偏移的偏振光通过光学评估装置进行处理,所述光学评估装置产生与光的偏振面的偏移量成比例的电输出。