Description
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.
It also meets IS:335-2018 TYPE II INHIBITED.
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 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 |
