Customer Benefits
- Prolongs transformer life
Low viscosity and low pour point provide excellent fluidity at low temperatures. Excellent conductive heat transfer properties improve cooling of transformer components. Low solvency protects electrical wire enamels. - Maximizes life of oil-immersed switches
Rapid quenching of arcs reduces contact erosion. - Maintains transformer efficiency
High dielectric strength and low dissipation factor provide excellent insulating characteristics. - Long service life
Highly refined base fluids limit the formation of sludges, deposits and soluble compounds which lead to a breakdown of the oil’s electrical properties.
Product features
- Formulated for severe operating conditions.
- Oxidation resistant and thermally stable.
- Extended service life.
- PCB-free
Applications
- Transformers.
- Oil-immersed switchgear.
- Circuit breakers.
- Oil-filled capacitors.
- Tap changers.
- Electrical reclosures.
- Fuses.
Approvals, Performance And Recommendations
Performance standards
- Transformer Oil BSI meets ASTM D3487 Type I requirement
Service Considerations
Delo Grease ESI EP 2 is designed using high viscosity base oils. These oils offer excellent protection in severe duty, high shock load conditions where typical ambient temperatures are above -18°C (0°F). Before using in applications involving onboard automatic grease dispensing systems in severe cold climate conditions, you should first consult with your equipment OEM specialist or Chevron Lubrication Specialist.
Not recommended for unheated shops where centralized automatic dispensing systems or long manual grease runs are the preferred method of lubrication and normal operating temperatures are consistently below -7°C (20°F).
Always confirm that the product selected is consistent with the original equipment manufacturer’s recommendation for the equipment operating conditions and customer’s maintenance practices.
Typical Test Data
| TRANSFORMER OIL BSI* | |
|---|---|
| Product Code | 520602 |
| Breakdown Voltage (Before Treatment), kV | 54 |
| Dissipation Factor @ 100°C | <0.01 |
| Neutralization Value, mgKOH/g | <0.01 |
Kinematic Viscosity
|
10.15 |
| Flash Point, PM, °C | >140 |
| Corrosive Sulphur | Non corrosive |
| Pour Point, °C | 45 |













