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    Interrelation of surface tension, optical turbidity, and color of operational transformer oils

    Year: 2011

    Journal: Power Technology and Engineering 2011, 45 (3) pp 240-244, 20121211

    Authors: S. Yu. L’vov, E. O. Lyut’ko, Ya. V. Lankau, V. B. Komarov, A. F. Seliverstov, V. N. Bondareva, Yu. N. L’vov, M. Yu. L’vov and B. G. Ershov

    Organizations: JSC “Presselektro”, Moscow, Russia; JSC “R & D for Power Engineering”, Moscow, Russia; A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences (IFKhÉ, RAN), Moscow, Russia; JSC “IDGC Holding”, Moscow, Russia

    Measurements of the acidity, optical turbidity, surface tension, and color of transformer oil from 54 power transformers, autotransformers, and shunt reactors are reported. Changes in surface tension, optical turbidity, and color are found to obey adequate linear correlations, while the acidity has no correlation with any of these properties. Numerical criteria for the maximum permissible state (quality) of the oil with respect to optical turbidity and color are obtained. Recommendations to operating staff are provided for cases in which the criteria for optical turbidity and color are exceeded.