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Master Transformer Oil (Power Oil)

Sr. No. Characteristics Test Method Specification Test Values
1. Function
1

Viscosity, mm2/s:

at 40 °C

at -30 °C

ISO-3104

ISO-3104

12.0 Max

1800 Max

10.2O

1350
2 Pour Point °C ISO-3016 Minus 40 Max -48
3

Water Content, ppm:

in Bulk

in Drums

IEC-60814

30 Max

40 Max

-

15
4 Breakdown Voltage, kV IEC-60156 30 kV rms. Min 62
5 Density @ 20 °C g/ml ISO-3675 0.895 Max 0.872
Density @ 29.5 °C g/ml ISO-3675 0.867
6 Dielectric Dissipation Factor (Tan δ) @ 90 °C IEC-60247 0.005 Max 0.00087
2. Refining/Stability
1 Appearance - Clear free from sediment and suspended matter Clear free from sediment and suspended matter
2 Color ISO-2049 1.5 Max L 0.5
3 Acidity, mg KOH/g IEC-62021-1 or 2 0.01 Max 0.0010
4 Interfacial Tension, mN/m EN 14210 or ASTM D 971 40 Min (Recommended) 47
5 Corrosive Sulphur ASTM D 12758 Non Corrosive Non Corrosive
Corrosive Sulphur DIN 51353 Non Corrosive Non Corrosive
Corrosive Sulphur IEC-62535 Non Corrosive Non Corrosive
6 DBDS IEC 62697-1 Not Detectable (<5 mg/kg) Not Detectable
7 Inhibitor of IEC-60666 IEC 60666 Not Detectable (<0.01%) Not Detectable
8 Metal Passivator Additives of IEC-60666 IEC 60666 Not Detectable (<5 mg/kg) Not Detectable
9 Other Additives - Does not contain any additives Does not contain any additives
10 2-Furfural Content and Related compounds content, mg/kg IEC 61198 Not Detectable (<0.1 mg/kg) Not Detectable
3. Performance
1

Oxidation Stability (164 hrs) @ 20 °C:

  1. Total acidity, mg KOH/g
  2. Sludge content % by mass
  3. Electric Dissipation Factor @ 90 °C

IEC 61125

METHOD-C

IEC 60247

1.2 Max

0.8 Max

0.5 Max

0.72

0.35

0.17
4. Health Safety and Environment (HSE)
1 Flash Point (PMCC) °C ISO 2719 135 Min 146
2 Polycyclic Aromatic Content, % IP 346 3 Max 1.42
3 PCB Content, ppm IEC 61619 Not Detectable Not Detectable