
Do you ever wonder which insulating oil to use for your transformer? Performance, safety, and environmental impact are key factors in your search?
If so, then it is a very crucial decision knowing which one of FR3 vs. mineral oil is your best bet. The main differences will make you choose wisely.
We will discuss in this article certain benefits that F3 oil offers vs. mineral oil and how FR3 oil became a favorite choice for new transformers.
What is FR3 Oil?
FR3 oil is a highly insulating fluid prepared on vegetable-based material. It is quite different from the transformer oils because, in addition to biodegradability, it is environment-friendly. Thus, it decomposes in the environment and helps preserve the earth.
Other properties include that FR3 oil is fire resistant. This fluid could withstand much hotter temperatures than common oils; hence, it is safer to use in transformers.
If you are designing a modern transformer, this is the ideal fluid. It is not just an environmental fluid but pretty efficient, hence enabling the transformers to work at a very optimal level and endure for long periods of time. FR3 oil is the smart and green solution to the energy needs of today.
More resource: The complete guide to Transformer Oil
Fr3 Transformer Oil Data Sheet
| Standard test methods | ASTM D6871/IEEEC57.147 | IEC 62770 | FR3 fluid | ||
| ASTM | ISO/IEC | As-received new fluid property requirements | Unused new fluid property requirements | Typical | |
| color | D1500 | ISO 2211 | ≤1.0 | – | 0.5 |
| Flash point PMCC (°C) | D93 | ISO2719 | – | ≥250 | 260-270 |
| Flash point coc (c) | D92 | ISO 2592 | ≥275 | – | 320-330 |
| Fire point (°C) | D92 | ISO 2592 | ≥300 | >300 | 350-360 |
| Pour point (°C) | D97 | ISO 3016 | <-10 | ≤-10 | -18 to -21 |
| Density at 20℃(g/cm³) | – | ISO 3675 | – | ≤1.0 | 0.92 |
| Relative Density(specific Gravity) 15℃ | D1298 | ≤0.96 | – | 0.92 | |
| Viscosity (mm²/s) | D445 | ISO 3104 | |||
| 100℃ | ≤15 | ≤15 | 7.7 – 8.3 | ||
| 40℃ | ≤50 | ≤50 | 32 – 34 | ||
| 0℃ | ≤500 | – | 190 | ||
| -20℃ | 650* | ||||
| Visual Examination | D1524 | IEC62770 4.2.1 | bright and clear | clear, free from sediment and suspended matter | clear, light green |
| Biodegradation | OECD 301B | readily biodegradable | readily biodegradable | readily biodegradable | |
| Aquatic and oral Acute Toxicity | OECD 202, 203, OECD 420 | non-toxic | non-toxic | non-toxic | |
The data source is from cargill.com
FR3 Natural Ester Transformer Oil is biodegradable, high-performance, insulating fluid produced from renewable vegetable-based esters for the stringent demands of modern industrial and environmental standards. It is formulated to be compostable and nontoxic as it is derived from sustainable raw materials geared toward the global green movement.
It is designed for superior fire safety, increased FR3 oil dielectric property that safeguards the inside component of transformers and ensures considerably delayed aging of an insulating paper, implying transformer longevity and stable action.
FR3 oil is renewable in composition. This considerably reduces the carbon footprint of the product compared to traditional mineral oil composition. Applications would ideally be in the renewable energy sector, whether it be sun or wind power, energy storage systems, or data centers.
What is Mineral Oil?
It’s one of the most popular insulating fluids and coolants in transformers for decades and, being petroleum-based, it finds its way into every form of transformer, as that’s what keeps transformers cool and insulated.
However, mineral oil has some downsides. If it leaks, it will become a pollutant of the environment because it does not break down easily. It is also a safety issue, because it poses a hazard in terms of fire. Therefore, if you are weighing and comparing the best oil to put in your transformer, you need to know both the advantages and disadvantages of mineral oil.
Key Benefits of FR3 Oil Over Mineral Oil
Sustainability and Environmental Impact
FR3 oil is different from the other types because it stands out in the FR3 oil is unique in that it excels in the environmental protection industry; mineral oil cannot be degraded because it is non-biodegradable and thus contaminates the earth.
There is less cause for alarm over the lasting damage done to soil or water with a spill. This quality thus places FR3 oil as safer and more environmentally friendly.
Safety and Fire Resistance
FR3 oil is safe in design, and this means that oil is a much better replacement for mineral oil. Some of the advantages include higher flash point as well as the fire point.
This means that it will take much more heat to make FR3 oil ignite as compared to the conventional mineral oil, hence much safer for your transformers. There is no doubt about the risks of fire when using the FR3 oil even in unfavorable conditions.
Performance and Durability
Daelim Transformer recognizes that reliability in performance is a significant factor in the business. This is as such a very big reason we have FR3 oil transformers.
Designed with tough applications and hostile environments, our transformers deliver high efficiency and are robust. Daelim Transformer provides efficient, durable, fire-resistant, and environmentally friendly high-performance transformers.
Temperature Regulation
Has your transformer ever made you worry how it would be when the sun was extremely hot or freezing cold? FR3 oil eliminates all this by working perfectly in a very wide range of temperatures that ensure your transformer keeps working uninterruptedly no matter what the weather will be. Between extreme hot and freezing cold, FR3 oil is the stability and cooling equipment needed to keep your equipment protected.
Cost Effectiveness Over Time
Daelim transformers are planned with special provision to easily remove such obstacles. FR3 oil makes the Daelim transformers operate in the toughest environments with utmost efficiency.
Daelim provides solid dependable power solutions that can endure harsh conditions. The most leading technology and FR3 oil will be matched with the most peace of mind.
When to Choose FR3 Oil or Mineral Oil?
Do you want to choose between FR3 oil and mineral oil for the transformer? FR3 oil is biodegradable as well as safe and ideal for the environmental user as well as for regions demanding utmost safety. Mineral oil, although the budgetary or age-old option poses higher risks to the environment.
Your choice will also depend on parameters such as its application and weather conditions. FR3 oil is highly exemplary for extreme temperature conditions while mineral oil is economical for more obvious applications.
We can help you to choose the right transformer oil that will enable you to reach your goals within a budgeted and required performance.
Conclusion
FR3 oil has several advantages compared to mineral oil, going a long way in defining its advantages in safety, sustainability, and performance. It is greener, safer, and more efficient for modern transformer systems.
Daelim’s series of FR3-compatible transformers on safety, performance and sustainability. Our team awaits to provide expert advice on tailored solutions and competitive quotation for your transformer needs.
Contact us today to schedule an appointment, or learn more through our website. Let Daelim help you find your transformer solution.











