The project is designed to control a circuit breaker by using a password for the safety of electric man. Critical electrical accidents to line men are on the rise during electric line repair due to lack of communication and co-ordination between the maintenance staff and electric substation staff. The system has two purposes. Firstly, whenever there is overload, the system shuts down automatically. The second purpose is for the electric line man safety which provides a solution that ensures safety of maintenance staff, i.e., line man. The control to turn on/off the line will be maintained by the line man only because this system has an arrangement such that a password is required to operate the circuit breaker (on/off). This system is fully controlled by a microcontroller from the PIC family. A matrix keypad is interfaced to the microcontroller to enter the password. The entered password is compared with the password stored in the ROM of the microcontroller. If the password is correct, then only the line can be turned on/off circuit using relay. If the password is in correct, then the system will send the alert SMS using GSM and line man will send the correct password by resending the SMS to the GSM modem from anywhere in the world. The activation / deactivation of the circuit breaker is indicated by a lamp. Status of loads is displayed on LCD. Buzzer indicates the alerts if the circuit breaks. Furthermore, this project in future can be enhanced by using PIC Microcontroller for the user to change the password for more secured system interaction. Status of loads is displayed on LCD. Buzzer indicates the alerts.              

The features of the project are:  

1. Keypad based password accessing.
2. GSM based SMS alerts.
3. Circuit breaker operation using password access.
4. It will activate the Buzzer for alerts if the circuit breaks.
5. Visible alerts using LCD display.

         

The major building blocks of this project are:  

1. Regulated Power Supply
2. PIC Micro Controller.
3. Keypad.
4. Buzzer.
5. Relays with driver.
6. GSM.
7. Crystal Oscillator.
8. Reset Button.
9. LED indicators.
10. LCD display.

           

Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

             

Regulated Power Supply:                      

Block Diagram:                

video: