Projects / Electrical / Electrical project 19

Underground Cable Fault Distance Locator

Approx. component budget: Rs. 3,000 - 6,000

Objective

Locate the distance of a fault along a cable model from the measured voltage drop and compare it with the actual fault position.

What you will build

A cable model made from resistor strings for each km, a DC supply, a voltage-divider based sensing circuit, an ADC and a display showing the fault distance for short and open faults.

Results you can expect

• Measured vs actual fault distance
• Error %
• Effect of cable resistance and supply voltage
• Response to different fault types

What you will learn

Fault location methods in power cables, voltage-drop measurement and basic instrumentation.

Tools and notes

Arduino, resistor network, LCD, Excel. Low-voltage DC project, so it is safe for a first electrical build.

Resume points from this project

• Built and tested Underground Cable Fault Distance Locator; objective: locate the distance of a fault along a cable model from the measured voltage drop and compare it with the actual fault position.
• Measured and analysed measured vs actual fault distance and error %; wrote the report and presented the results in a viva. Add your own numbers: [x].

Replace [x] with your own measured results. Write only what you really did.

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