Underground Cable Fault Detection Methods

2 offline method in this method special instrument is used to test out service of cable in the field there are two offline methods as following 1 tracer method in this method fault point is detected by walking on the cable lines fault point.

Underground cable fault detection methods.

Fault points online method for underground cable are less than overhead lines. If the fault is considered to be high resistive or intermittent a dc voltage can be applied to the cable to determine at which voltage the fault breaks down. Syscompact 4000 cable fault location system with integrated tdr and thumper surge generator titron cable test van breakdown detection. This paper proposes fault location model for underground power cable using microcontroller.

Use of the arc reflection method combined with a high capacitance surge generator and state of the art pinpointing devices for underground cable fault locating will find faults in less time and with less risk of damaging good cable than classical techniques. This project uses the simple concept of. Underground cable fault distance locator circuit. The aim of this project is to determine the distance of underground cable fault from base station in kilometers.

The challenge with the existing methods used for locating faults in underground cables is the inaccuracy in calculating the distance where the fault is located and the low durability of such. In 20 years that followed over 2000 fault location vehicles were manufactured more than half of which were intended for the former ussr. Finding the type of a fault in underground cables using a megger should not be a difficult task. Finding the location of an underground cable fault doesn t have to be like finding a needle in a haystack.

Before we discuss fault detection methods we shall study the various types of faults occurring in underground cables and their causes. The van is installed with conventional cable measuring systems for quickly reaching the location of any cable fault. 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. But finding the exact location of the cable fault needs special techniques.

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