des project poster

By: Desmond Lai Supervisor: Mr. Matthew Teow

INTRODUCTION & OBJECTIVE FLOWCHART

MAIN CONTROLLERS

AUXILIARY DRIVERS

POWER SUPPLY

PROJECT SPECIFICATION

SCHEMATICS

DESIGN & INNOVATION EXPO 2010 ● ENGINEERING - INSPIRED INNOVATION

TESTING & RESULT

LIGHTNING OCCUR

ELR TRIP

MOBILE PHONE RECEIVE

TRIP NOTIFICATION

REPLY NOTIFICATION

TO RESET ELR

ELR RESET

MOBILE PHONE RECEIVE

UPDATED NOTIFICATION

FURTHER DEVELOPMENT

CONCLUSION

The following is a list of project specifications:

• A valid mobile Sim card to be insert into the

system

• A specific notification receiver mobile number

to be set in the system

• Power supply condition notification sent from

the system

• ELR only be reset when the residual current is

clear

• Residual current limit and trip delay time can

be set manually

• Low power consumption ±25Wh

This project has proposed a promising solution for

remote control of RCCB operations. We are

believed that in the coming near future, this

proposed RCCB remote monitoring and control

solution can be applied in our household

electrical system.

DIP-EEENG ● 2009/2010

A residual current circuit breaker (RCCB) is the

primary electrical protection system that can be

found in every home. As presented in this project

title, this project applies the current state of the

art mobile communication technology, namely,

Instant Messaging (IM) protocol to monitor and

control the RCCB operations. Therefore, this

project aims to improve the standard RCCB by,

firstly, it allows remote monitoring of the RCCB

tripping status that cause by leakage current in

our home electrical circuit. Second, it remotely

controls and reset the RCCB back to a normal

operating condition for restoration of the

electrical circuit activity in our home. However,

this remote control and reset function will only be

worked if a safe level of residual current being

identified by the microcontroller decision making

algorithm.

The following system flowchart shown the

operational steps of the proposed project.

The proposed project can be divided into three (3)

main modules, The figures in below shown the

designed circuits for the proposed project.

Experiment has been carried out to identify the

proposed functions and operation of the project.

Figures in below presented the experimental setup

and testing results.

To increase the efficiency of the operation, a

comparator is proposed to identify power outage

from the distributor, MCB trip or RCCB trip will be

added to the system.

ELR RESET

FAIL

ELR SUCCESSFULLY RESET

WHEN SAFE CONDITION

OF RESIDUAL CURRENT

DETECTED.

ELR UNSUCCESSFUL TO

RESET WHEN UNSAFE

CONDITION OF RESIDUAL

CURRENT DETECTED.