1. PASSWORD BASED CIRCUIT
BREAKER CONTROL TO ENSURE
ELECTRIC LINE MAN’S SAFETY

2. ABSTRACT

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

3.  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 PIC16F877A
IC.
 If the password entered is correct, then only the
line can be turned ON/OFF. Activation /
deactivation of the circuit breaker is indicated by
a lamp (ON/OFF).

4. BLOCK DIAGRAM..

5. Hardware & Software
Requirements:
HARDWARE COMPONENTS REQUIREMENTS:
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PIC16F877A Microcontroller
Relay Driver IC
Relays
Matrix Keypad
Resistors
Transformer
Voltage Regulator
Lamps.
SOFTWARE COMPONENTS REQUIREMENTS:
 Keil compiler
 Language: Embedded C or Assembly

7. DESCRIPTION OF COMPONENTS:
PIC16F877A
 PIC16F877A is the flash technology, so that data
is retained even when the power is switched off.
 Easy programming and Erasing are other features
of PIC 16F877A.
 The A/D convertor module in PIC 16877A
has eight inputs .The conversion of analog input
results in a corresponding 10 bit digital output.
The A/D module has four registers.

8. LCD Display (16x2)
 LCD (Liquid Crystal Display) screen is an
electronic display module.
 A 16x2 LCD display is very basic module and
is very commonly used in various devices and
circuits
 A 16x2 LCD means it can display 16
characters per line and there are 2 such lines.
In this LCD each character is displayed in 5x7
pixel matrix. This LCD has two registers,
namely, Command and Data.

9. CONCLUSION
 Thus the mini project ,’’PASSWORD BASED
CIRCUIT BREAKER CONTROL TO
ENSURE ELECTRIC LINE MAN’S SAFETY
THE PIC MICROCONTROLLER’’.
 This proposed system provides a solution,
which can ensure the safety of the maintenance.
 The control to turn ON/OFF the line with the
line man only...
THANK YOU.....