Suppression of Metallic Particle Lift-off in GIS by Nonlinear Resistivity Coating

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  • 非線形抵抗コーティングによるGISの金属異物の浮上抑制
  • ヒセンケイ テイコウ コーティング ニ ヨル GIS ノ キンゾク イブツ ノ フジョウ ヨクセイ

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Abstract

For the suppression of metallic particle lift-off in compact Gas-Insulated-Switchgear (GIS), a coating with nonlinear resistivity characteristic was adapted to the inner surface of GIS tank. Electrical field analysis using the measured current density to electric field (J-E) characteristics indicates that the nonlinear resistivity coating can reduce the field enhancement between metallic particles and the coating effectively to suppress particle lift-off. Experiments using a coaxial GIS bus duct geometry indicate that the nonlinear resistivity coating increases the lift-off electric field of metallic particles with small statistical dispersion compared to a dielectric coating.

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