Improvement of the Electrical Performance of Outdoor Porcelain Insulators by Utilization of a Novel Nano-TiO2 Coating for Application in Railway Electrification Systems

The present study aimed to develop the electrical performance of outdoor insulators using a nano-TiO2 coating for railway electrification systems. prototype design porcelain with normal coatings and is based on IEC 60815-1. first test was performed measure low-frequency flashover AC voltage under both dry wet conditions. In addition, other conducted lightning impulse critical-flashover at positive negative polarity dry-normal wet-contaminated X-ray diffraction (X-RD) Scanning electron microscopy (SEM) were used examine micro surface show that adhered insulator exists in an amorphous state. Additionally, it observed discovered scattered strengthens glassy matrix creates sturdy barrier causes be reduced conditions high dielectric strength. Nanostructured ceramic formulations outperform ordinary terms breakdown strength, particularly insulators’ performances However, significant change characteristics not much better when adding insulators.