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Evaluation of Leakage Current Measurement for Site Pollution Severity Assessment

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Author(s): Seyyed Mohammad Hossein NABAVI | Ahmad GHOLAMI | Ahad KAZEMI | Mohammad Ali Shercat MASOUM

Journal: Leonardo Electronic Journal of Practices and Technologies
ISSN 1583-1078

Volume: 6;
Issue: 10;
Start page: 39;
Date: 2007;
Original page

Keywords: Reliability | Leakage Current Measurement | Site Pollution Severity | Flashover

ABSTRACT
Flashover of insulators in transmission and distribution systems may cause costly outages for power companies and their customers. Industrial and/or coastal pollution of external insulation is a major cause for such events at the normal power frequency voltage of the systems. The power companies are now facing increasing competition resulting in pressure to lower the cost and to increase the system reliability. Different methods have been applied in the past to overcome or reduce the problems with flashover on insulators. Methods which should provide reliable data under real physical conditions. In this paper several measuring methods to evaluate the pollution levels on outdoor insulators are described. According to this comparison, Leakage Current Measurement ‘LCM’ method is a reliable method for measurement leakage current in outdoor insulators and surge arresters.