Underground Cable Fault Detection Method

There are many locating methods coupled with new detection technologies that make this task much easier and less time consuming.

Underground cable fault detection method.

The surges produced help in pinpointing the fault and tracing the route of the cable when used with acoustic fault locator. High voltage for pressure testing of the underground cables to find out faulty phase and the breakdown voltage with leakage current. But finding the exact location of the cable fault needs special techniques. In this method you inject a specific frequency signal with help of a transmitter and then race it back with a receiver.

Cable detection or fault finding can be done via two methods. Surge generator generates d c. In order to identify the faults in the cable we need to develop special methods which will be discussed in this article. Here the electromagnetic field already present on the utility is detected with the help of a receiver or detector.

1000 joules energy on 5 10 20 kv range. Finding the location of an underground cable fault doesn t have to be like finding a needle in a haystack. Underground cable fault distance locator circuit. Two of the popular techniques are the murray and varley loop tests for locating faults in underground cables this article explains about few other popular techniques for locating faults in underground cables viz.

Before we discuss fault detection methods we shall study the various types of faults occurring in underground cables and their causes.