Wind Power

Transformers designed to use FR3 fluid are more compact and lighter than other transformer types—critical considerations for wind turbines. In addition, FR3 fluid’s physical properties mean that a transformer with thermally upgraded Kraft (TUK) paper and FR3 fluid can be classified as thermal class of 140 and run with a 130°C hot spot without losing dielectric strength or accelerating the aging of insulation paper. Such smaller and lighter transformers can easily handle high loads over the entire life, providing a benefit to the bottom line.

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Fires involving mineral-oil-filled transformer are more frequent than most people think, and they can cause catastrophic damage to equipment and people. FR3 fluid is a less flammable, high-fire-point, fire-resistant, K-class transformer insulation liquid. It is also classified as non-propagating; it is self-extinguishing and will not continuously burn if ignited. For wind power generation transformers, this can mean significant cost savings, since equipment-damaging or equipment-destroying fires are incredibly unlikely and fire mitigation systems are minimal. In fact, in 25+ years of in-field use, there have been zero reported pool fires in transformers filled with FR3 fluid. 

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Large onshore and offshore wind farms are difficult and expensive to access. Using FR3 fluid can mean minimal transformer maintenance and associated costs. The goal of most maintenance efforts is removing moisture from a transformer’s solid insulation and dielectric fluid. This is not necessary with FR3 fluid. FR3 fluid draws moisture out of a transformer’s insulation paper and “consumes” free water in the fluid—without producing corrosive sludge. This can extend the life of the insulation paper and transformer and can also reduce maintenance.

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Made from vegetable oil, with performance-enhancing additives, FR3 fluid is the industry’s first and leading natural ester dielectric fluid. Unlike mineral oil, it is nonhazardous and nontoxic in water and soil.¹ It is also 100% biodegradable in as little as 10 days. Due to these features, transformers filled with FR3 fluid require simplified spill containment and remediation. In fact, bioremediation in case of a spill typically does not require costly equipment and labor. Not only are FR3-fluid-filled transformers environmentally suited for wind power generation applications, but they also help companies meet sustainability goals.

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