Effect of Nano Filler Concentration on Leakage Current of Hybrid Silicone Rubber Composite Insulators

Electrical insulation materials are indispensable to the electrical power system's continual and reliable operation. Over both indoor and outdoor applications, electrical insulation materials like silicon rubber and epoxy have been employed extensively for the past 25 years. To improve dielectric performance and reliability, researchers working in the field of electrical insulation are concentrating on hybrid composite insulation materials. A typical hybrid composite insulation material combines nanoparticles and base materials. The insulation characteristics of these materials are further improved by adding nano and microparticles. This study investigates silicone rubber composite incorporated with nano and microparticles with different percentages. The ultimate stress was improved by 29.88% in the hybrid sample with 6% nano- and 20% micro-silica, which also had a maximum breakdown strength of 26.6 kV mm1 and 50% weight loss at the highest temperature of 575 °C. The main objective is the effect of filler concentration on leakage current (LC) of hybrid silicone rubber composite insulators.