to Transformer oils (insulating oils)
to Properties of fluids
(submitted by the website administration)
| Mineral transformer oil | ||||
| Mineral based oil | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density at 60°F (15.6°C) | 0.880 *10³ | kg/m³ | 54.9 | lb/ft³ |
|---|---|---|---|---|
| Kinematic viscosity at 68°F (20°C) | 22 | cSt | 22 | cSt |
| Kinematic viscosity at 212°F (100°C) | 2.6 | cSt | 2.6 | cSt |
| Fire point | 170 | ºC | 338 | ºF |
| Pour Point | -50 | ºC | -58 | ºF |
| Flash point | 160 | ºC | 320 | ºF |
| Autoignition point | 280 | ºC | 536 | ºF |
| Specific heat capacity | 1860 | J/(kg*K) | 0.444 | BTU/(lb*ºF) |
| Thermal conductivity at 20ºC (68ºF) | 0.126 | W/(m*K) | 0.875 | BTU*in/(hr*ft²*ºF) |
| Thermal expansion at 20ºC (68ºF) | 7.5*10-4 | ºCˉ¹ | 4.2*10-4 | in/(in* ºF) |
| Breakdown strength | min.70 | kV | min.70 | kV |
| Dielectric dissipation factor at 90ºC (194ºF) | max.0.002 | max.0.002 | ||
| Permitivity at 20ºC (68ºF) | 2.2 | 2.2 | ||