FR3™ Natural Ester Fluid is a leading transformer dielectric and cooling fluid trusted by utilities, OEMs, renewable energy developers, and data centre operators worldwide. With more than 30 years of proven field performance and millions of transformer installations globally, FR3 fluid has become the industry benchmark for transformer safety, reliability, and resilience.
Made from renewable seed oils, FR3 fluid provides a high-performance alternative to conventional mineral oil. Its exceptional fire safety characteristics, superior moisture tolerance, and excellent dielectric properties help extend transformer life, enhance reliability, and enable greater loading flexibility. Rapid biodegradability and a low environmental impact make it well suited for use in urban, critical infrastructure, and environmentally sensitive locations.
Widely adopted across power grids, renewable energy projects, industrial facilities, and data centres, FR3 fluid helps reduce total ownership costs while improving asset performance and operational efficiency. As energy systems continue to evolve, FR3 fluid supports safer, more resilient, and future-ready power networks.