Research and implementation on portable metal-oxide arresters performance detection

Abstract

This paper proposed a new portable measurement method for resistive leakage current of MOA (Metal Oxide Arrester). This method mainly utilizes electric field coupling theory to obtain the voltage phase information of MOA, and uses current transformer to get the effective value and phase information of full leakage current from lightning counter, then it obtains the resistance current value by calculation. With above principles, we designed a portable MOA performance detection circuit, and verified the validity. This method is simple, convenient and secure.