High voltage characteristics of kraft paper insulator with effect of palm oil and coconut oil

This paper presents the behaviors and properties of Kraft paper used for transformer insulation with effect of palm oil and coconut oil. Palm oil and coconut oil are chosen as a transformer oil because it has the potential to be used as transformer oil which is more environmentally friendly. Three types of Kraft paper which have the same thickness and width have been used in this research. The test conducted in this experiment comprises on analyzing observation of the Kraft paper ageing process, the breakdown High Voltage Direct Current test, Impulse Voltage test, carbon track and erosion analysis. Three samples of Kraft paper have been immersed in palm oil and coconut oil up to 90 days to observe the absorption rate. All samples reach saturation level start at 70 days of immersion. Breakdown test which consist of High Voltage Direct Current test and Impulse Voltage test have been done based on normal, Kraft paper immersed in palm oil and coconut oil condition. Based on the result from breakdown test and analysis of erosion, it was found that Billerud Kraft paper has become the best sample among the Kraft papers in terms of level of damage when immersed in palm oil and coconut oil.