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Partial discharge sensor

  • US 9,383,402 B2
  • Filed: 02/21/2012
  • Issued: 07/05/2016
  • Est. Priority Date: 02/21/2012
  • Status: Active Grant
First Claim
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1. A partial discharge sensor detecting a partial discharge that occurs in high power equipment provided with:

  • a first conductor tube having a first flange formed on an end portion thereof;

    a second conductor tube having a second flange formed on an end portion thereof;

    an insulating spacer that is sandwiched between the first and the second flanges, and holds a high-voltage cable inside the first and the second conductor tubes;

    a plurality of connection bolts that connect the first and the second flanges with each other,the partial discharge sensor comprising;

    a metal casing disposed on an outer side of the first and the second flanges, having a longitudinal direction in a circumferential direction of the first and the second flanges and also a width direction in a thickness direction of the insulating spacer, and having one surface opened on the side of the first and the second flanges; and

    a bowtie antenna disposed inside the metal casing, and disposed in a direction orthogonal to the circumferential direction of the first and the second flanges, and having an overlapping portion with the first and the second flanges, anda strip metal plate that covers a circumference of the insulating spacer other than an opening of the metal casing,wherein the bowtie antenna includes a first triangular conductor disposed to have a base facing one side of the metal casing in the longitudinal direction and a second triangular conductor disposed to have a base facing the other side of the metal casing in the longitudinal direction.

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