A Study on Recovery Voltage during Capacitive Current Interruption on High Resistance Earthed Neutral Systems

Abstract

The recovery voltages between contacts of circuit-breaker during capacitive current interruption on overhead transmission lines with high resistance neutral system were investigated. Conditions were clarified which are to be equivalent on recovery voltage level between high resistance neutral system and effectively earthed neutral system using single line and double line systems. The conditions are tentatively indicated as less than 100km of line length and less than 1 kilo ohms of neutral resistance.