This study examines the design and construction of AC Electronics load surge protection in order to carry electric surge load arisen from faults in low voltage electricity system (single phase/220V) by using the principle of electronics load clamping voltage during induction period so that electric voltage could go through to safe load and continue to work. The qualification of the designed device could prevent both transient over voltage and voltage swell. Both will work in cooperation, resulting in the ability to improve and modify the quality of electrical power in Thailand electricity distribution system more effective than the past and help increase the lifetime of electric appliances, electric devices, and electricity protection equipments.
 Sangkasaad ,Samruay, Dr., High Voltage Engineering, Department of Electrical Engineering, Faculty of Engineering, Chulalongkorn University, 2004.
 Chalartsakul, Thanawat, Power System Analysis ,Technology Promotion Association (Thailand-Japan), 2004.
 Hokierti ,Jamnarn, Assoc. Prof. Dr., Voltage Swell in Low Voltage Electricity System, Department of Electrical Engineering, Faculty of Engineering, Kasetsart University.
 Hokierti ,Jamnarn, Assoc. Prof. Dr., Questions and Answers about Electrical Power ,Department of Electrical Engineering, Faculty of Engineering, Kasetsart University.
 Provincial Electricity Authority ,Manual: Questions and Answers about Techniques for Industrial Electrical Quality ,May, 2 005.
 Golde, R.H. editor, Lighning, Dover Publiccation, 1984.
 Vladimir A. Rakor and Martin A. uman, Lighning Physic and Effects, First Pulished, 2003.
 IEEE std 1159-1995, IEEE Recommended practice for Monitoring Electric Power Quality.
 Roger C. Dugan, Mark F. McGranaghan and H. Wayne Beaty, Electrical Power Systems Quality.
 Peter Hasse, Overvoltage Protection of Low Voltage Systems, 2nd Edition, IEE Power and Energy Series 33, 2000.
 IEEE Std C62.41-1991, IEEE Recommended Practice on Surge Voltage in Low-Voltage AC Power Cicuit,1991.
 IEEE Std C62.45-1992, IEEE Guide on Surge Testing for Equipment Connected in Low-Voltage AC Power Cicuit,1992.
 IEC 6100-4-5, Electromagnetic Compatibility (EMC), Part 4-5, Testing and measurement techniques, Surge immunity test, 2000.