Analysis of Surge Arrester using FEM

Abstract

This paper presents the voltage distribution study of zno surge arrester. Based of the idea of using the
FEMM 4.2 software whci work on the environment of finite element method. Here FEMM 4.2 software package is used
for analyze voltage distribution along the zno varistor column of the surge arrester. In this paper is effect of grading ring
on distribution of voltage along the zno column of 230 kv surge arrester is investigated using the finite element method
based software. In a zno oxide surge arrester, the voltage distribution, between the high voltage and ground connections, is not
uniform along the discs column. So by the use of grading ring voltage distribution is made uniform. Simulation results shows that
using grading voltage distribution can be made as uniform as possible.