Breakdown voltage of palm oil insulation enhanced with rice husk powder

Siti Sarah Junian; Mohamad Zul Hilmey Makmud; Jedol Dayou.

Palm oil (PO) is a potential alternative to mineral oil for electrical insulation and has previously been studied with rice husk (RH) powder as a filler. Research has shown that RH powder enhances the breakdown voltage (BDV) and hence the dielectric, and physical properties of PO. Additionally, the effect of different preparation methods has been explored, showing further improvements in these properties. In this study, we modified the preparation method by scaling up the sample volume from 500 ml to 800 ml, leading to a positive impact on the properties of PO. To determine the optimal RH concentration for achieving the highest BDV, various concentrations of RH in PO were tested according to the IEC 60156 standard. The results demonstrate that the BDV improved significantly with the 800 ml sample volume compared to previous studies. Moreover, the data revealed a maximum curve trendline in the graph of BDV versus RH concentration. Overall, the modified preparation method yielded better BDV results, with the optimal RH concentration found to be 0.20 g/L, providing the highest BDV value.

KEYWORDS: Palm oil; High voltage; Insulation; Rice husk powder; Dielectric



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