Electrical Performance of Porcelain Surge Arrester in 22 kV Distribution System under Contaminated Conditions

Prakasit  Sritakaew; Wichet  Thipprasert

doi:10.4236/jpee.2015.35007

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JPEE Vol.3 No.5 , May 2015

Electrical Performance of Porcelain Surge Arrester in 22 kV Distribution System under Contaminated Conditions

Wichet Thipprasert, Prakasit Sritakaew

Abstract: Stability and reliability of distribution system are able to be improved by many protective devices including insulators, relay and surge arrester (SA). SA is used for protection of lightning and switching surge in Provincial Electricity Au-thority (PEA). This paper presents an experimental investigation of 22 kV distribution SA electrical performances under pollution conditions according to IEC 60507. The experimental results of leakage currents more than 6 mA at Equiva-lent Salt Deposit Density (ESDD) 0.6 mg/cm2 at nominal voltage. These data will be useful to be guideline for solving problems and reducing power loss from leakage current on the surface of SAs as a result of surface dirt and pollution. Moreover, it will be useful to select or design suitable SAs for using in places with salt conditions, high rainfall, high wind speeds and high humidity.

Keywords: Polluted Condition, Equivalent Salt Deposit Density, Lightning Surge, Switching Surge

Cite this paper: Thipprasert, W. and Sritakaew, P. (2015) Electrical Performance of Porcelain Surge Arrester in 22 kV Distribution System under Contaminated Conditions. Journal of Power and Energy Engineering, 3, 75-81. doi: 10.4236/jpee.2015.35007.

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