HP TRANSFORMER OIL I
Detail Description:
HP TRANSFORMER OIL I is inhibited type transformer oil meeting IS:12463. Inhibited transformer oils can extend the service life of transformer oil.
Physico-chemical Properties:
| Test Method | Typical | |
|---|---|---|
| Appearance | A representative sample of the oil shall be examined in a 100 mm thick layer at 27ºC | Clear and transparent and free from suspended matter or sediments |
| Density at 29.5ºC, g/cc | IS 1448 [P : 16] : 1990 | 0.8279 |
| Kinematic viscosity, at 27ºC at 40ºC |
IS 1448 [P : 25] : 1976 | 16.46 11.76 |
| Interfacial tension at 27ºC, | IS 6104 : 1971 | 0.044 |
| Flash point Pensky-Marten (closed), ºC | IS 1448 [P : 21] : 1992 | 148 |
| Pour point, ºC | IS 1448 [P : 10] : 1970 | -18 |
| Neutralization value a) Total acidity, b) Inorganic acidity/alkalinity |
IS 1448 [P : 2] : 1967 |
Nil Nil |
| Corrosive sulphur | Annex B of IS 335 - 1993 | Non Corrosive |
| Electric strength (breakdown voltage) a) New unfiltered oil, b) After filtration, min |
IS 6792 : 1992 Note 2 |
72 |
| Dielectric dissipation factor (tan δ) at 90ºC, | IS 6262 : 1971 | 0.00025/2.05 DC |
| Specific resistance (resistivity) a) At 90ºC, b) At 27ºC, |
IS 6103 : 1971 | 750 × 1012 ohm-cm 7650 × 1012 ohm-cm |
| Oxidation stability a) Neutralization value after oxidation, b) Total sludge, after oxidation, |
IS 12422 - 1988 | Nil Nil |
| Oxidation stability (Rotating Bomb test), minutes | IS 12958 - 1990 | 210 |
| Oxidation inhibitor, percent by, wt | IS 13631 - 1993 | 0.26 |
| Water content, ppm | IS 13567 - 1992 | 9 |
