31-03-2015, 05:20 PM
Please send us c code of passward based circuit breaker using 8051 microcontroller.
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ieee papers on circuit breaker using microcontrollers
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Please send us c code of passward based circuit breaker using 8051 microcontroller.
13-03-2017, 11:19 AM
Conventional circuit breaker as MCB is based on the mechanism of firing of the thermal bimetallic lever, so it is very slow and also the trip time depends on the percentage of overload. This project detects the current passing through a series element and the corresponding voltage drop is compared to the predetermined 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 when realizing that conventional circuit breakers, such as MCBs, take longer to shoot. Therefore, for sensitive loads, it is very important to activate the trigger mechanism in the shortest possible time, preferably instantaneously. This project demonstrates the fast firing mechanism against a slower one like the MCB. The electronic circuit breaker relies on voltage drop across a series element proportional to the load current, typically a low value resistor.
This voltage is detected and rectified to the DC which is then compared to a voltage pre-set by a level comparator to generate an output that drives a relay through a MOSFET to trigger the load. The unit is extremely fast and overcomes the drawback of the thermal type. It uses a microcontroller of the PIC16F8 family. In addition, the project can be improved by using a CT for galvanic isolation between the network and the control circuit. Power electronic devices such as thyristors / IGBTs can be used for ultra fast operation compared to all methods.
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