Importance of the consideration of electrical gradient force in the deactivation of free conducting particle under DC voltage

This paper discusses the importance of the consideration of the electrical gradient force (or dielectrophoretic force) which has not been adequately considered in the particle deactivation methods in Gas Insulated System (GIS). The particle motion on bare and coated electrode in the presence of the electrical gradient force is investigated under DC voltage in atmospheric air. On the basis of the obtained results, the effectiveness of the particle traps installed on the spacer surface and in the grounded electrode is confirmed experimentally.