Abstract
Department of Safety Engineering, Korea National University of Transportation, Chungju 380-702, Korea(Received June 20, 2015; Revised June 24, 2015; Accepted June 24, 2015)Abstract: In this study, the frequency properties of electrostatic capacity and dielectric loss for the samples with different types of filler has been measured in through the applied frequency range of 7 kHz ~3,000 kHz at temperature of 80, 110, 140, 170. The results of this study are as follows. When the sample is degradated at the temperature of 80, 110, 140, 170and the frequency range of 7 kHz ~3,000 kHz is applied, It found that the electrostatic capacity of the sample with Polyimide film is larger than the sample with Grass fiber. It found that the dielectric loss for the sample with Polyimide film is larger than the sample with Grass fiber with increasing frequency and temperature in the 80, 110, 140, 170range. Also, the dielectric loss decreased with increasing frequency. In case of the sample with Polyimide film, It found that the electrostatic capacity decreased with increasing temperature, and the dielectric loss gradually decreased with increasing frequency.Keywords:
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