Measurements of External Partial Discharges on Solid Dielectric Prespan in Air

G.K. Soulinaris, D.D. Dimitriadou, M.P. Paisios, P.T. Tsarabaris, and P.D. Bourkas (Greece)


Partial discharges, potential step, solid dielectric.


In this work, high voltage pulses of the form 1.2/50μs were applied on a metal tip - solid dielectric - metal plate combination in the air. The recording of partial discharges in air is a difficult process because the molecules of gasses are volatile and agile. The outbreak of partial discharges above a threshold electric field according to the above combination may come as the result of impact ionization and affects the dielectric aging procedure.

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