Natural Ester Transformer Fluids
Renewable Natural Ester for Transformer Sustainability
MIDEL eN 1204 is a rapeseed-based natural ester transformer fluid developed for environmentally conscious transformer applications. Fully biodegradable and derived from renewable sources, this fluid is especially suited for non-free-breathing transformers in colder climates and environmentally sensitive zones.
Features & Functionality
Natural ester fluids are derived from vegetable oils, making them a renewable and environmentally responsible alternative to mineral oil. They are readily biodegradable, significantly reducing environmental risk in the event of a leak or spill—especially important for transformers installed in sensitive or populated areas.
With a high fire point (typically >300°C), natural esters are classified as “K-class” fire-safe fluids. This drastically reduces the risk of transformer fires, improving safety in high-risk locations such as tunnels, buildings, or bushfire-prone areas, and can reduce the need for costly fire suppression systems.
Natural esters are highly hygroscopic, absorbing and retaining moisture without compromising insulation performance. This reduces the risk of paper insulation degradation and prolongs transformer life, especially in non-free-breathing transformer designs where moisture management is critical.
Unlike soy-based alternatives, MIDEL eN 1204 (rapeseed-based) has a pour point of -31°C, making it well-suited for installations in colder climates. This allows utilities and OEMs to specify natural ester fluids with confidence, even in regions with extreme weather conditions.
Where you'll find Insulect Ester Fluids
You'll find Insulect-supplied Ester Fluids products across Australia and New Zealand.
