Detection and location of dielectric fluid leaks on pipe-type cable systems

The feasibility of using a hydrocarbon sensing wire to detect and accurately locate dielectric fluid leaks in power cables is shown. The construction of sensor cables developed for this purpose is described. The tests carried out on the cable are also described, and field trial results are reported. Because retrofitting old and operational feeders requires costly excavations, the system is suitable for installation on new feeders. However, use of boring techniques, which eliminate the disruption and expense of surface excavation by producing a small diameter tunnel beneath the surface, is an alternative option that is presently under investigation