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Measuring device having an auxiliary electrode for a gas-insulated encased high-voltage conductor

  • US 5,166,600 A
  • Filed: 09/23/1991
  • Issued: 11/24/1992
  • Est. Priority Date: 03/22/1989
  • Status: Expired due to Fees
First Claim
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1. A measuring apparatus for measuring a voltage of a gas-insulated high-voltage conductor having a casing with a mantle surface and an internal conductor, comprising:

  • a) an auxiliary electrode configured as a tubular projection on the mantle surface of the casing forming a high-voltage capacitor of a capacitive voltage divider with the internal conductor of the gas-insulated high-voltage conductor, said auxiliary electrode being disposed and insulated in the casing;

    b) an inside cone being coupled to said auxiliary electrode and having an angle of inclination;

    c) an outside cone being nested together with said inside cone at a specifiable distance, having an angle of inclination opposite said angle of inclination of said inside cone and forming a low-voltage capacitor with said inside cone, wherein said auxiliary electrode is coupled to the casing via the low-voltage capacitor;

    d) an interstice formed between said inside and outside cones;

    e) a solid dielectric filling said interstice and having a dielectric constant that remains constant even at high frequencies;

    f) a passage in the tubular projection;

    g) a measurement connection emerging out of the tubular projection via said passage in a gas-tight manner and being coupled to said auxiliary electrode, wherein said auxiliary electrode is connectable to a display or measuring device via said measurement connection;

    h) a terminal resistor; and

    i) a gas-tight coaxial connector having an internal conductor coupled to said inside cone, forming a shielded measurement connection via said terminal resistor, and having a contact surface for shielding the shielded measurement connection galvanically coupled to the casing and to said outer cone, wherein said terminal resistor is adapted to a characteristic impedance of the coaxial connector and/or a characteristic impedance of the shielded measurement connection.

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