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This paper studies the charge distribution on the transmission line glass insulator surfaces under two different ac voltages viz. 28 kV and 33 kV. A string of four insulator units under dry and clean conditions is taken as the main research object. An attempt to capture the accumulated charge has been made by using radially shaped stainless steel mesh placed axially at a distance of 2 cm from each...
This paper reports an investigation carried out in the laboratory on 45 units of glass insulator samples. The insulator units comprise of 5 groups; new and field-aged insulators with different ageing period (>30, 20, 15 and <10 years) from 132 kV transmission line. The results revealed a correlation between the ratio of the 3rd and 5th harmonic amplitudes with the degree of degradation of the...
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