Figure 7. Voltage distribution on the discs of ceramic cap and pin insulators at different voltages. Disc numbers increase from the HV end to ground end. a) 765 kV disc insulator with 47 discs. b) 400 kV disc insulator with 25 discs. c) 230 kV disc insulator with 15 discs

From

Comprehensive Analysis for Electric Field and Potential for Polymeric and Ceramic Insulators

Mohamad Saleh Sanjari Nia, Mohammad Altimania, Pourya Shamsi, Mehdi Ferdowsi

American Journal of Electrical and Electronic Engineering. 2020, 8(1), 26-34 doi:10.12691/ajeee-8-1-4