Transformers Magazine, Vol. 11 No. 4, 2024.
Original scientific paper
The statistical scatter of breakdown voltages of transformer oil - Part I
Vitaly Gurin
Marius Grisaru
Abstract
For the future statistical optimization of power transformer insulation design, more than two hundred publications on transformer oil breakdown voltage (BDV) were reviewed. Data were extracted where possible, and coefficients of variation (CV%) were calculated. The first part of the article discusses the conditions under which the test is considered valid, in accordance with ASTM D877, ASTM D1816, GOST 6581-75, and IEC 60156 standards, as well as the conditioning effect. The article is intended for young transformer engineers and for teaching undergraduate and postgraduate students about transformers in universities.
Keywords
ASTM; breakdown voltage; conditioning effect; coefficients of variation; ester; GOST; failure; IEC; MEGGER; power transformer; statistical scatter; transformer oil
Hrčak ID:
321321
URI
Publication date:
8.10.2024.
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