Description
Detail Description
HP TRANSFORMER OIL is designed for human safety and free from carcinogenic Poly chlorinated Bi-phenyls (PCB) and Poly aromatic hydrocarbon (PAH).
PROPOSED USAGE
- Electric transformers
- Switch gears
- Circuit breakers which require insulating fluids
- Has very high oxidation stability
- Excellent ageing properties resulting in long product life
Physico-chemical properties
| PROPERTIES | HP TRANSFORMER OILS |
|---|---|
| Appearance | Clear and transparent and free from suspended matter of sediments |
| Density at 29.5 ºC, g/cc | 0.8279 |
| Kinematic viscosity, cst
At 27ºC At 40ºC |
16.46 11 |
| Interfacial tension at 27ºC | 0.044 N/m |
| Flash point pensky-marten (closed),ºC | 172 |
| Pour point,ºC | -18 |
| Neutralization value, mg KOH/g
a) Total acidity b) Inorganic acidity/alkalinity |
Nil Nil |
| Corrosive sulphur | Non corrosive |
| Electric strength (breakdown voltage) –kV(rms)
a) New unfiltered oil |
72 |
| Dielectric dissipation factor at 90 ºC | 0.00025 |
| Specific resistance (resistivity)
a) A:90 ºC b) A:27 ºC |
750×1012 ohm-cm 11300×1012 ohm-cm |
| Oxidation stability
a) Neutralization value after oxidation, mg KOH/g b) Total sludge after oxidation,% by wt. |
0.4 0.1 |
| AGEING CHARACTERISTICS AFTER AGEING | |
| Open breaker method with copper characteristics | |
| Specific resistance (resistivity)
a) A:27 ºC b) A:90 ºC c) dielectric dissipation factor at 90 ºC d) total acidity e) total sludge |
350×1012 ohm-cm 19×1012 ohm-cm 0.0025/2.08 DC NIL NIL |
| Presence of oxidation inhibitor,% by wt | Absent |
| Water content, mg/kg(ppm) | 50 |
| SK value (%) | 1 |
APPROVALS
HP TRANSFORMER OIL is certified Central Power Research Institute (CPRI), Bangalore and Electrical Research and Development Association (ERDA), Vadodara
