The statistical scatter of breakdown voltages of transformer oil – Part I
For the future statistical optimization of power transformer insulation design, more than two hundred publications on transformer oil breakdown voltage (BDV) were reviewed.
by V. Gurin, M. Grisaru
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 column by Vitaly Gurin and Marius Grisaru is intended for young transformer engineers and for teaching undergraduate and postgraduate students about transformers in universities.
#ASTM#breakdown voltage#coefficients of variation#conditioning effect#ester#failure#GOST#IEC#megger#power transformer#statistical scatter#transformer oil
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