Design And Construction Of A Password Based Circuit Breaker

Project and Seminar Material For Electrical Electronics Engineering EEE

Design And Construction Of A Password Based Circuit Breaker


Chapter One


Introduction

1.1 General Concepts

In previous years, the problem of lack coordination between the electric power station and the maintenance team that in switch off the circuit breakers during the line men on their work or has not finished yet removing or clearing faults, causing a high damages including injury the team of maintenance with an electric shocks may lead to death or combustion at least, also include damages to the equipments that use.

So there must be a way to secure and gives a protection to the line man or the maintenance team by not returning the circuit breaker while the maintenance team on a work and that by the line man himself and this insurance is in the form of a password entered by a keypad located in the station, or by a sending a message to the controller include the password.


1.2 Problem Statement

To give an environment to the line man about no one can return the line unless he get finished his work we made a circuit breaker based with password to achieve a safely system to the team that work on maintenance whatever it is.

A circuit breaker is an automatically operated electrical switch 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. Unlike a fuse, which operates once and then must be reset (either manually or automatically) to resume normal operation. When operate manually we see fatal electrical accidents to the line man are increasing during the electric line repair due to the lack of communication and coordination between the maintenance staff and the electric substation staff.


1.3 Objectives

The main objectives of this study are to:

  1. Design of Password Based Circuit Breaker circuit.
  2. Implementation of Password Based Circuit Breaker circuit.
  3. Simulate of controlling Password Based Circuit Breaker circuit.

1.4 Methodology

  1. Study all of previous studies.
  2. Research about circuit breaker types.
  3. Research about keypad, LCD and GSM module.
  4. Drawing the block and wire diagram.
  5. Starting with the programming logic.
  6. Design of Password Based Circuit Breaker.

1.5 Project Layout

This project consists of five chapters: Chapter One gives an introduction about the principles of the project, in addition its reasons, motivation and objectives. Chapter Two discusses the theoretical background of Control Systems, global system for mobile (GSM) System, Microcontroller System, circuit breaker Operated. Chapter Three descripe the mechanical part of relay, The electrical part, Software and Hardware. Chapter Four shows the System Implementation and the experimental results. Finally, Chapter five provides the conclusion and recommendations.


Chapter Five


Conclusion and Recommendations

5.1 Conclusion

A perfect protection has been achieved to line man, in whilst of increase of line man accident that happens while repairing the electrical lines due to the lack of communication between electrical substation and maintenance staff nowadays. Finally protective system has given to line man protection.

The solve of this problem clarified on using a password to turn ON/OFF circuit breaker. It is not a teaser to turn OFF circuit breaker the issue is that to turn ON circuit breaker whilst line man on a task that may cause a fire , blast , burning, also we can’t ignore the damage that may cause burning the station this lead to financial losses.

The needle of turn off circuit breaker has represented on adding a buses to station or to treating (lines, transformers, generators … etc). The manual part is using the keypad to entering password that will appear on LCD screen to be absolute about that you enter the password you preselected. The password will store on Arduino’s EEPROM and the output is to rotate a motor that separate a moving contact and break the circuit. Here a safety has provided to the line man because the moving contact will not move unless we entering the same password that line man select. In addition to alarm that has made in case that some one try to turn ON circuit breaker after he entering a wrong circuit breaker.

By using a global system mobile (GSM) an extra feature has gained represented on gaining time just the line man has to send the same password he selected before in a massage and the breaker will restart the circuit. of the above a multi features have introduced to power system generally and particular electrical protection system is to provide electrical protection from risk, burning, and gain time.


5.2 Recommendations

When we implemented to this project some obstacle appeared most of all solved, and little of it remained, therefor a lot of space for further improvement. •The controller can receive a message only from a certain number that actually must be saved in the wizard include the password this will give a more security, no one can try to send a random password from any number because the controller does not receive any massage from any number except the number that saved in the wizard.

Another feature can be added in nameable of reducing cost by use only one controller to control in many relays that depend on adjusting just on code.


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