to Transformer oils (insulating oils)
to Properties of fluids
(submitted by the website administration)
| Synthetic transformer oil | ||||
| Organic esters based fluid | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density at 60°F (15.6°C) | 0.970 *10³ | kg/m³ | 60.6 | lb/ft³ |
|---|---|---|---|---|
| Kinematic viscosity at 68°F (20°C) | 70 | cSt | 70 | cSt |
| Kinematic viscosity at 212°F (100°C) | 5.3 | cSt | 5.3 | cSt |
| Fire point | 322 | ºC | 612 | ºF |
| Pour Point | -60 | ºC | -76 | ºF |
| Flash point | 275 | ºC | 527 | ºF |
| Autoignition point | 438 | ºC | 820 | ºF |
| Specific heat capacity | 1880 | J/(kg*K) | 0.448 | BTU/(lb*ºF) |
| Thermal conductivity at 20ºC (68ºF) | 0.144 | W/(m*K) | 0.98 | 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.75 | kV | min.75 | kV |
| Dielectric dissipation factor at 90ºC (194ºF) | max.0.006 | max.0.006 | ||
| Permitivity at 20ºC (68ºF) | 3.2 | 3.2 | ||