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PROJECT DESCRIPTION

The project is designed to shut down the power supply instantly when it is overloaded. Conventional circuit breaker like MCB is  based on thermal bimetal lever trip mechanism hence it  is very slow and besides the same 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 demonstrates the fast tripping mechanism as against  slower 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 is rectified to DC which is 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 PIC16F8 family.

Furthermore, 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.

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The project is designed to shut down the power supply instantly when it is overloaded. Conventional circuit breaker like MCB is  based on thermal bimetal lever trip mechanism hence it  is very slow and besides the same 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 demonstrates the fast tripping mechanism as against  slower 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 is rectified to DC which is 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 PIC16F8 family.

Furthermore, 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.

PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm IST.
×
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm IST.
BLOCK DIAGRAM
Ultrafast Acting Electronic Circuit Breaker Using PIC Microcontroller
Hardware Requirements
  • PIC16F8 series Microcontroller
  • Op-amp
  • Transformer
  • MOSFET
  • Diodes
  • Capacitors
  • Resistors
  • LED
  • Crystal
  • LCD
  • Voltage Regulator
  • Relay
  • Lamps.
×
  • PIC16F8 series Microcontroller
  • Op-amp
  • Transformer
  • MOSFET
  • Diodes
  • Capacitors
  • Resistors
  • LED
  • Crystal
  • LCD
  • Voltage Regulator
  • Relay
  • Lamps.
Software Requirements
  • CCS C compiler & MPLAB
  • Languages: Embedded C or Assembly
×
  • CCS C compiler & MPLAB
  • Languages: Embedded C or Assembly
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