Evaluation of 띠ectrical Uniformity of Zinc Oxide Varistors for Lightning Surge Arresters

초고압 피뢰기용 산화아연소자의 전기적 균일성 평가

This paper presents evaluation of the electrical uniformity of zinc oxide varistors for lightning arresters. Two types of varistors were prepared which are a domestic varistor destroyed in the long duration current impulse withstand test and a new imported varistor. The domestic varistor exhibited good electrical uniformity except destroyed parts, but the imported varistor showed the worse results.