The circuit breaker is an absolutely essential device in the modern world, and one of the most important safety mechanisms in your home. Whenever electrical wiring in a building has too much current flowing through it, these simple machines cut the power until somebody can fix the problem. Without circuit breakers (or the alternative, fuses), household electricity would be impractical because of the potential for fires and other mayhem resulting from simple wiring problems and equipment failures.
This system uses a microcontroller and keypad to control and protect electric power. Keypad is used to enter the password. The password which is entered is compared with the predefined password. If entered password is correct then the corresponding electrical line is turned ON or OFF.
Nowadays, electrical accidents to the line man are increasing, while repairing the electrical lines due to the lack of communication between the electrical substation and maintenance staff. This project gives a solution to this problem to ensure line man safety. In this proposed system the control (ON/OFF) of the electrical lines lies with line man.
This project is arranged in such a way that maintenance staff or line man has to enter the password to ON/OFF the electrical line. Now if there is any fault in electrical line then line man will switch off the power supply to the line by entering password and comfortably repair the electrical line, and after coming to the substation line man switch on the supply to the particular line by entering the password.
The main component in the circuit is 8051 microcontroller. In this project 4×3 keypad is used to enter the password. The password which is entered is compared with the predefined password. If entered password is correct then the corresponding electrical line is turned ON or OFF. In this project a separate password is provided to each electrical line. Activation and deactivation of the line (circuit breaker) is indicated by the load.
The project is designed to control a circuit breaker with help of a password. This proposed system provides a solution, which can ensure the safety of the maintenance staff. EXAMPLE:Line man. The control to turn ON/OFF the line lies with the line man only
This system has an arrangement such that a password is required to operate the circuit breaker (ON/OFF). Line man can turn off the supply and comfortably repair it, and return to the substation, then turn on the line by entering the correct password. The system is fully controlled by a microcontroller IC. If the password entered is correct, then only theØ line can be turned ON/OFF. Activation / deactivation of the circuit breaker is indicated by a lamp (ON/OFF).
1.1 OBJECTIVE OF THE PROJECT
Circuit breaker is designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow. It protects an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city. The main objective of this work is to design a device that can perform these functions using keypad instead of switch to control the ON or OFF of appliances.
1.2 SIGNIFICANCE OF THE PROJECT
Avoids electrical accidents to line manProject is simple and easyUses commonly available components
1.3 APPLICATION OF THE PROJECT
Used in electrical substations to ensure line man safetyThis system is used in buildings and housesUsed in hotels and shopping malls to save the power.
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