Projects / Electrical / Electrical project 49

Electronic Circuit Breaker (E-Fuse) with Adjustable Trip Curve

Approx. component budget: Rs. 4,000 - 8,000

Objective

Build a resettable electronic breaker that trips on overload and short circuit, and measure its trip times against a conventional fuse.

What you will build

A MOSFET or relay switch in series with the load, a current sensor with a fast comparator and a microcontroller that implements adjustable trip level and delay with a reset, and a display.

Results you can expect

• Trip time vs current
• Adjustable trip curve
• Short-circuit response time
• Comparison with a fuse and a thermal breaker

What you will learn

Overcurrent protection, fast sensing and trip logic, and how semiconductor breakers are used in EVs and DC systems.

Tools and notes

Arduino/STM32, MOSFET or relay, shunt or Hall sensor, oscilloscope, Excel. Keep the test supply at low DC voltage, and use a fuse in series as a backup.

Resume points from this project

• Built and tested Electronic Circuit Breaker (E-Fuse) with Adjustable Trip Curve; objective: build a resettable electronic breaker that trips on overload and short circuit, and measure its trip times against a conventional fuse.
• Measured and analysed trip time vs current and adjustable trip curve; 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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