Figure 3. Schematic of a typical ceramic cap and pin and polymeric insulator with corona rings at both the line end and ground end and modeled in AutoCAD for FEM computations

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