Eco-friendly ester liquid transformer designs

Liquid-filled transformers depend on oil for their smooth operation. This transformer oil keeps the transformer cooled, insulated, and lubricated.  Natural esters like FR3 fluid have quickly become the fluid of choice in oil-filled transformers.  

What is FR3 Oil?

FR3 fluid is a natural ester made from seed oils—similar to the vegetable oil in your kitchen. It is a safer, more sustainable alternative to the standard mineral oil found in many older transformers.  Unlike mineral oil, which is derived from petroleum, FR3 fluid is plant-based, making it more environmentally friendly and safer for use in electrical equipment.

FR3 fuid is the original, most tested and proven natural ester in the world. Used for over 25 years in over 3 million distribution and power transformers and validated through hundreds of feld and laboratory tests, FR3 natural ester continues to be trusted by leading OEMs and transformer users around the globe. Derived from over 95% renewable vegetable oil, FR3 natural ester outperforms mineral oil resulting in more reliable, higher performing, and more sustainable transformers. It’s the smartest choice in dielectric fuids—for performance, value, and peace of mind.

Advantages of FR3 Oil

1, Exceptional Reliability

• Continuously dries paper insulation without creating any damaging byproducts or sludge for up to 8X longer paper insulation life
• Easily handles high heat with up to 140°C top fuid temperature

2, More Sustainable

• Carbon neutral and zero global warming potential

• Non-toxic in water, soil, and to wildlife and humans

3, Increased Loading Capacity

• Up to 20% more loading capacity compared to mineral oil without impacting transformer lifespan

• Design a smaller transformer with the same loading capacity, the same sized

  transformer with up to 20% more loading capacity, or any combination in between

4. Superior Fire Safety

• 0 reported fires in over 25 years
• K-class fluid with over 2X higher flash and fire points compared to mineral oil(360°C fire point)

5. Cost Savings

• Design a smaller, more power dense transformer and save on expensive materials like steel, aluminum, copper and insulating paper

• Remove or greatly reduce expensive fire remediation and spill containment

FR3 Fluid Applications

Power Transmission and Distribution

Solar Power

Wind Power

Industrial Transformers

Data Centers

Conclusion

Varelen's factory can provided FR3 oil fluid , can power your transformers more compactand  reliably and more sustainably

Get more loading capacity from your transformers and keep your solar farms operating at their full capacity with FR3 fluid’s ability to easily handle difficult harmonics, high variable load conditions, and extreme heat fluctuations.