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Dissolved gas analysis caused by electrical breakdown of liquid impregnated pressboards
Author(s)
Luk-In, Kanchanaporn
Samerpak, Chantapapa
Chumninuan, Nattakrit
Piyapatamin, Nadpakul
Hengcharoensuk, Tassana
Nupinit, Thanapon
Siriworachanyadee, Jompatara
Date Issued
July 1, 2019
Type
Conference Paper
Abstract
The aim of this paper is to analyze the dissolved gases in dielectric liquid caused by electrical breakdown of liquid-impregnated pressboards. The pressboards were prepared with dimension of 100 x 100 x 3.2 mm (W x L x H). First of all, each liquid insulation, mineral oil and natural ester (FR3), was heated at 60°C with 200 mbar for 12 hours. Second, pressboards were heated at 80°C with 200 mbar for 12 hours. Then the heated pressboards were impregnated with the dielectric liquid at 60°C with 200 mbar for 12 hours. The impregnated pressboards were divided into three groups. The first group was tested with AC voltage. The second and third group was tested with positive and negative lightning impulse voltages respectively. From the test results, the type and quantity of generated gases caused by breakdown phenomena is dependent on the type and the number of breakdowns.
Citation
Proceedings of the 16th International Conference on Electrical Engineering Electronics Computer Telecommunications and Information Technology Ecti Con 2019, 349-352, 2019