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Electrical Behaviors of ZnO Elements under Combined Direct and Alternating Voltages
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 Title & Authors
Electrical Behaviors of ZnO Elements under Combined Direct and Alternating Voltages
Yang, Soon-Man; Lee, Bok-Hee; Paek, Seung-Kwon;
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 Abstract
This paper presents the characteristics of leakage currents flowing through zinc oxide (ZnO) surge arrester elements under the combined direct-current (DC) and 60 Hz alternating-current (AC) voltages. The current-voltage characteristic curves (I-V curves) of the commercial ZnO surge arrester elements were obtained as a function of the voltage ratio a. At constant peak value of the combined DC and AC voltage, the resistive leakage current of the ZnO blocks was significantly increased as the voltage ratio increased. The I-V curves under the combined DC and AC voltages were placed between the pure DC and AC characteristics, and the cross-over phenomenon in both the I-V curves and R-V curves was observed at the low current region. The ZnO power dissipation for DC voltages was less than that for AC voltage in the pre-breakdown region and reversed at higher voltages.
 Keywords
ZnO element;Combined DC plus AC voltages;Leakage current;I-V characteristic;Crossover phenomenon;Surge protection;
 Language
English
 Cited by
1.
직류+60[Hz] 교류 중첩전압에 대한 ZnO 피뢰기 소자의 전기적 특성,이복희;양순만;

조명전기설비학회논문지, 2012. vol.26. 4, pp.41-47 crossref(new window)
2.
임펄스전류에 의한 배전용 ZnO 피뢰기 소자의 열화특성,이복희;조성철;양순만;

조명전기설비학회논문지, 2013. vol.27. 3, pp.79-86 crossref(new window)
1.
Deterioration Characteristics of ZnO Surge Arrester Blocks for Power Distribution Systems Due to Impulse Currents, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2013, 27, 3, 79  crossref(new windwow)
2.
Electrical Characteristics of ZnO Surge Arrester Elements Subjected to the Mixed DC and 60[Hz] AC Voltages, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2012, 26, 4, 41  crossref(new windwow)
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