Main Article Content
This article presents an approach to identify the electrical appliances with leakage current in a low voltage 220VAC network by frequency analysis. A voltage with particular frequency that corresponds to each electrical appliance is injected into its ground point when leakage current occurs. A particular frequency will be found at the ground link in the main distribution board (MDB) using the Fast Fourier Transform (FFT) technique. The performance of this method is verified by using the simulation program PSpice. Moreover, the prototype hardware with program LabVIEW is also implemented with the electrical appliances to show the effectiveness of this method.
 The Electro-Technical Council of Ireland. 2005. .Guide to the Selection & Use of Residual Current Devices, Edition 1. In: The Electro-Technical Council of Ireland Limited. 2006.
 Sleva AM. Protective Relay Principles. USA: CRC Press, Taylors & Francis Group; 2009.
 Luo X, Du Y, Wong XH, Chen ML. Tripping Characteristics of Residual Current Devices under Non-Sinusoidal Currents. In: IEEE Industry Applications Society Annual Meeting. Houston: TX; 2010. p. 1–6.
 Abd Azzis AZH, Nor NM, Ibrahim T. Automated Electrical Protection System for Domestic Application. In: Proceedings of the 7th IEEE
International Power Engineering and Optimization Conference (PEOCO). Malaysia; 2013. p. 3–4.
 Rajaram J, Nor NM, Ibrahim T, Daud H, Shaikh PH. A Novel Supervisory Control for Residential Building Protection System. In: Proceedings of the 2014 IEEE 8th International Power Engineering and Optimization Conference (PEOCO). Malaysia; 2014. p. 286–290.
 Joshi N. Microcontroller based Fault Detector. International Journal of Advancements in Research & Technology. 2012; 1: 281–288.
 Chen D, Zhao Q, Chen F, Luo S. Adaptive Residual Current Circuit Breaker Based on Microcontroller. In: Proceedings of the 2nd International Conference on Digital Manufacturing & Automation. Hunan; 2011. p. 159–162.
 Circulator SA. Earth Leakage Protection and Monitoring Solution, Technical document, Barcelona, Spain.
 Carr JJ. Electronic Circuit Guide Book, Vol. 6: Oscillator. Chennai: Prompt publication; 1999.