1
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.
