Development of a Leak Location System for Use on Underground Electric Power Transmission Cable

摘要

This report describes a study to evaluate methods for locating leaks of dielectric fluid from buried high-voltage cable systems. Two primary types of leak location systems were investigated:(1) systems that will rapidly isolate the leak within a manhole section, typically 1000-m long on a feeder that might be 30-km long, and (2) systems that will then pinpoint the location of the leak.nRapid leak isolation was accomplished by developing an enhanced conductivity oil probe which allows the injection of a small quantity of conductive oil and which indicates the path of the oil as it drifts downstream in the direction of the leak.