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This paper reported the different leakage current waveforms of discharges on ceramic insulators and RTV coated insulators in the artificial pollution flashover tests. According to the recorded data, the joint time and frequency analysis methods of short-time Fourier transform (STFT) and Gabor transform were used to pick up the characteristics of leakage currents and analyze the development and transition...
Room temperature vulcanized (RTV) silicone rubber coatings are used increasingly on outdoor high voltage (HV) insulators subjected to heavy pollution. An important property of the RTV coatings is the ability to restore the surface hydrophobicity after a pollutant layer has built up on the surface, which can suppress the development of leakage currents, dry band arcing and flashover. The present study...
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