The Routine Transformer Analysis Tests provide analysis on your transformer oil for:
Colour /Appearance- The colour/appearance to gauge if there is any sudden deterioration in the oil during the time it is being analysed for different species. Colour has also been useful in the past as a cross check of the sample identity. For example, a sudden change from dark to light colour can indicate an oil change or incorrect sample designation.
Acidity - The acidity level of transformer oil is measured to BS2000 Part1:1982 (also IP 1/74 method A). High acidities accelerate the degradation of the paper insulation and causes corrosion of the steel tanks, we would normally suggest changing the oil when the acidity approaches 0.3mgKOH/g, but expresses concern when it reaches 0.1mgKOH/g. It is believed that acidity increases exponentially with time.
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