Title :
Estimation of dc breakdown mechanisms in air gaps containing floating metallic particles
Author :
Kubuki, M. ; Yoshimoto, R. ; Yoshizumi, K. ; Tsuru, S. ; Hara, M.
Author_Institution :
Dept. of Electr. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
2/1/1997 12:00:00 AM
Abstract :
The characteristics of breakdown voltages against the position of floating metallic particles in atmospheric air are investigated experimentally. The breakdown mechanism is estimated on the basis of electric field calculation and visual observation of discharges at different voltages and a set of flow charts for calculation of breakdown voltage is proposed. The studied gaps are needle-to-plane and sphere-to-sphere electrodes of 120 mm in length forming Poissonian and Laplacian fields respectively and the shape of tested floating objects is a needle or sphere. The theoretical breakdown voltages obtained by the flow charts agree reasonably with the experimental ones
Keywords :
air gaps; electric breakdown; 120 mm; DC breakdown; Laplacian field; Poissonian field; air gap; discharge; electric field; floating metallic particles; flow chart; needle-to-plane electrodes; sphere-to-sphere electrodes; Air gaps; Breakdown voltage; Corona; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Flowcharts; Laplace equations; Needles; Shape;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
