Password Based Load Control System

Password Based Load Control System

Password Based Load Control

Nowadays, electrical accidents to the line man are increasing, while repairing the electrical lines due to miscommunication between the maintenance staff & the electric substation staff. During the electrical fault or short circuit, the power network will suffer from a high stress of fault current in them which may harm the equipment permanently.

To overcome this problem, we introduces password based load control system which is arranged in such a way that maintenance staff or line man has to enter the password to ON/OFF the electrical line. Separate passwords are allocated for every electrical line that access by authorized person only. Now, if there is any mistake in the electrical line then the line man will switch off the power supply to the line by entering password and comfortably repair the electrical line.

Block diagram:

The main component in the circuit is 8051 microcontroller. A 4×4 matrix keypad is used to enter the password. The password which is entered is compared with the predefined password stored in ROM of microcontroller. If entered password is correct, then the corresponding electrical line is turned ON or OFF and display line or load status on LCD. If the password is wrong, then display “wrong password” on the LCD.

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 (Light Bulbs).

Hardware requirements:

·       8051 microcontroller

·       keypad

·       Voltage regulator

·       LCD

·       Power supply

·       Relay driver

·       Relays

·       Lamps

Software requirements:

•           MC Programming Language: Embedded C
•           Keil version IDE
•           Proteus For Circuit & PCB Design