Ultra Fast Acting Electronic Circuit Breaker


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*Project Report and PPT included
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The project is designed to shut down the power supply when it is overloaded. Conventional circuit breaker like MCB based is on thermal bimetal lever trip mechanism. It is very slow and the trip time is dependent upon the percentage of overload.

This project senses the current passing through a series element and the corresponding voltage drop is compared against the preset voltage proportional to the current by a level comparator to generate an output for the load to trip.

The concept of?electronic circuit breaker?came into focus realizing that conventional circuit breakers such as MCBs take longer time to trip. Therefore, for sensitive loads it is very important to activate the tripping mechanism at the shortest possible time, preferably instantaneously.

This project is demonstrates fast tripping mechanism as against the slow one like MCB. Electronic circuit breaker is based on the voltage drop across a series element proportional to the load current, typically a low value resistor.

This voltage is sensed and rectified to DC which is and then compared with a preset voltage by a level comparator to generate an output that drives a relay through a MOSFET to trip the load. The unit is extremely fast and overcomes the drawback of the thermal type. It uses a microcontroller from 8051 family.

Further the project can be enhanced by using a CT for galvanic isolation between mains and control circuit. Power electronic devices such as thyristors / IGBTs can be used for ultra fast operation compared to all the methods.

Hardware Requirements

  • 8051 series Microcontroller
  • Op-amp
  • Transformer
  • Diodes
  • Capacitors
  • Resistors
  • LED
  • Crystal
  • LCD
  • Voltage Regulator
  • Relay
  • Lamps

Software Requirements

  • Keil compiler
  • Languages: Embedded C or Assembly



Q.What is the validity of the course?
Ans: It will be valid till one month from date of registration.
Q. Will the course cover hardware description?
Ans: Yes. It will cover hardware too.
Q. How many times lectures can be watched?
Ans: You can access a video lecture n no. of times during validity of your course.
Q. Will I get the certificate after completion of my course?
Ans: Yes every candidate will be awarded with certificate of training within two weeks after completion.
Q. Can I use this website in my mobile phone?
Ans: Yes but pc mode will be preferable for better understanding.
Q. Can we learn from other user registration id?
Ans: No. because we will trace the IP address of your pc, laptop, mobile if it is found unmatched with the registered id, registration will cancelled automatically and user will debarred from all services including certification.
Q: Will we get software package.
Ans: Yes u will get software package before proceeding to tutorials with how to install notes.

Block Diagram