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Transformer Oil of Selective Refinement |
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All-Union State Standards 10121-76
Transformer Oil of Selective Refinement is intended for filling in transformers and oil-filled electric equipment.
Guarantee period of storage – 5 years from the day of manufacture. Index Name | Transformer Oil of Selective Refinement | Kinematic viscosity, mm²/s, not more than: | | - at 50°С | 9 | - at 20°С | 28 | - at minus 30°С | 1300 | Acid number, mg КОN/g, not more than | 0,02 | Temperature, °С: | | - flash temperature in a closed crucible, not lower than | 150 | - solidification temperature, not higher than | −45 | Fraction of total mass, %, not more than: | | - mechanical impurities | None | - water-soluble acids and alkalis | None | - phenol | None | - sulphur | 0,6 | Ash level, %, not more than | 0,005 | Sodium test of acidified alkaline extract in the ditch of 20 mm, absorbance, not more than | 0,4 | Transparency at 5°С | Transparent | Colour, units of CNТ, not more than | 1 | Stability according to the statistical method, not more than: | | - acid number of the oxidized oil, mg КОN/g | 0,3 | - water-soluble acids’ content in the oxidized oil, mg КОN/g | 0,03 | - sediment fraction of total mass in the oxidized oil, % | 0,015 | Tangent of dielectric loss angle at 90°С, %, not more than | 2,6 |
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