An Experimental Investigation of Leakage Current on High Voltage Contaminated Insulators

P.T. Tsarabaris, C.G. Karagiannopoulos, and N.J. Theodorou (Greece)


leakage current, flashover, insulator.


This paper deals with leakage current measurements on 20 kV porcelain insulators. The measurements were performed in a time frame of one period (50 Hz) and the insulator was contaminated from a compound of salt and dust. The investigation of the observed phenomena showed that the response to the applied voltage is linear at first and thereafter takes the form of pulses. The study was made via i-u characteristics plotted for one period of operation. Partial discharges and arcs are some of the most possible physical phenomena experimentally detected.

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