Which grade of mineral oil is used in transformers as transformer oil?

02 February 2014 1 8K Report

There are various grades of mineral oils such as : light(sn70), medium(sn150) and heavy(sn500) mineral oil or naphtenic and paraffinic minearl oil. Which grade of mineral oil is known as standard transformer oil

Haris Ahmed

65NHVI / white oil is used.napthenic. having viscosity from 9-12cSt @40°C. with pour as low as -30°C

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