±HVDC Tracking Characteristics of Cycloaliphatic Epoxy/Epoxidized Soybean Oil(ESBO)/Microsilica Composite

Recently, in accordance with the “2050 Carbon Neutral” and “Green New Deal policies,” research has begun to curb the use of petrochemical substances as part of reducing greenhouse gas emissions and instead use eco-friendly bio-epoxy as an outdoor electrical insulator. A sample was prepared by mixing Epoxidized Soybean Oil (hereinafter referred to as ESBO), which was developed by epoxidizing vegetable oil with eco-friendly characteristics, with Cycloaliphatic Epoxy (hereinafter referred to as CAE), an outdoor petrochemical product, according to the stoichiometric composition ratio. Six types of physical mixing ratios of the manufactured samples, namely CAE:ESBO=Contents Ratio(100:0, 90:10, 80:20, 70:30, 60:40, 50phr:50phr)/W12est_65wt% were prepared. Six types of samples were tested in an outdoor environment using a (+)HVDC IPT (Inclined Plate Tracking Erosion) system under the conditions of HVDC_3.5kV and a flow rate of fouling liquid of 0.3ml/min. The IPT measurement measured the size of leakage current, surface temperature using a thermal imaging camera within the tracking length, and real-time tracking discharge by setting up a video camera. And the erosion depth and erosion amount were investigated to evaluate the IPT characteristics of CAE+ESBO/W12est_65wt% Composites in an outdoor environment.