가정용 전기기구의 효과적인 뇌서지 보호기법 = Effective Protection Methods of Household Electric Appliances from Lightning Surges

다국어 초록 (Multilingual Abstract)

This paper deals with the effective protection method for the household electric appliances against lightning surges invading from the power lines. Direct or induced lightning is the main cause of the breakdown of household electric appliance. The most effective protection method is to install SPDs(surge protective devices) at household electric appliances. If SPDs were not installed at most household electric appliances, it is necessary to install SPDs on the mains. Therefore the propagation aspect and protection methods of lighting surges coming into household electric appliances through the mains was experimentally investigated. The in actual-sized test circuits results of protection method for 8 household electric appliances including computer monitors and TV set could be summarized as follows:
The breakdown characteristics of household electric appliances from lightning surges were significantly changed with the their input impedance. Namely, the types of input impedance are classified into infinite, resistive or inductive impedances. Especially, the monitor for computer with inductive input impedance from lightning surges was relatively weak against lightning surges. It was confirmed that the self inductance of branch circuits on the mains have protection effect for household electric appliances against lightning surges invading from the power lines. Also the varistors installed at cabinet panel or circuit-breaker were more effective than multi-tap outlet with varistors. When installed varistors in cabinet panel and multi-tap outlet together, the surge protection effect is much more excellent in technical and economical aspects.

참고문헌 (Reference)

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2 이복희, "정보통신용 뇌서지 보호장치의 효과적인 설치기법" 16 (16): 90-96, September,2002.

3 이승칠, "뇌방전은 어떠한 자연현상인가?" 52 (52): 29-32, April,2003.

4 No 2, "surge in distribution transformers" 7 : 1992.

5 Alexandre Piantini, "Voltage surges transferred to the secondary of distribution transformers" 1999.

6 R. B. Standler, "Protection of Electronic Circuits from Overvoltages" john wiley & sons inc. : 55-77, 1989.

7 M. B. Marz, "Protecting load devices form the effects of low-side surges" 29 (29): 1993.

8 ANSI/IEEE C62, "41-1980 copyright 1980 by The Institute of Electrical and Electronics Engineers by permission of the IEEE Standards Department."