Description
Sinopec Insulated Transformer Oil is a series of products blended using highly refined mineral oil and a selected antioxidant. It is designed for insulating and cooling transformers, oil-immersed switch-gear, and other electrical insulating applications. There are four grades, I-0℃, I-10℃, I-30℃, and I-40℃, which are selected based on their low-temperature performance. None of the grades contain harmful polychlorinated biphenyls (PCBs).
Applications:
Sinopec Insulated Transformer Oil is suitable for use in:
- Oil-filled transformers, operating at 330 kV or less, where it acts as a non-conducting insulating and cooling medium.
- Oil-immersed switch-gear.
- Other electrical insulating applications.
Features and Benefits:
- Excellent dielectric (insulating) properties: Effectively prevent discharge in an electric field.
- Low viscosity and low density: Provide good cooling properties and heat transfer characteristics at room temperature and below, ensuring effective cooling of transformer core and coils.
- Even at very low temperatures, the oil viscosity remains low: Allowing the transformer to be started up under very cold conditions without problems.
- Excellent oxidation stability characteristics: Provided by the stable base oil together with the high-performance oxidation inhibitor system, preventing the formation of acidic material and sludge in service, extending the life of the oil.
- All four grades meet the requirements of IEC 60296:2003 for transformer oils.
Typical Properties and Specifications:
| Property | I-0℃ | I-10℃ | I-30℃ | I-40℃ |
|---|---|---|---|---|
| Kinematic Viscosity, mm²/s, ASTM D 445 | ||||
| cSt @ 40℃ | 8.93 | 9.34 | 9.91 | 9.68 |
| cSt @ -10℃ | – | 116.0 | – | – |
| cSt @ -30℃ | – | – | 423.4 | 753.0 |
| Corrosive Sulfur, ASTM D 1275 B | Not corrosive | Not corrosive | Not corrosive | Not corrosive |
| Dielectric Breakdown (as received), kV, IEC 60156 | 50 | 47 | 50 | 53 |
| Dielectric Dissipation Factor @ 90℃, IEC 60247 | 0.0009 | 0.0007 | 0.0008 | 0.0001 |
| Interfacial Tension, mN/m, ISO6295 | 49.1 | 47.3 | 47.1 | 48.7 |
| Oxidation Stability, 164 h @ 120℃, IEC 61125C | ||||
| Total Acidity, mg KOH/g | 0.09 | 0.02 | 0.0822 | 0.0218 |
| Sludge, wt% | 0.04 | 0.008 | 0.0075 | 0.0175 |
| Pour Point, ℃, ISO 3016 | -39 | -42 | -45 | -54 |
| Flash Point (PMCC), ℃, ISO 2719 | 162 | 153 | 158 | 154 |
| Density @ 20℃, g/mL, ISO 3675 | 0.8486 | 0.8330 | 0.8378 | 0.8354 |
