German Grid Operator Installs World’s Largest FR3 Transformer

TransnetBW, a transmission network operator in the German state of Baden-Württemberg, recently installed a 420 kV power transformer in one of its substations in southwest Germany that is cooled and insulated with Envirotemp™ FR3™ Natural Ester Fluid.

The substation transformer, which has a power rating of 300 MVA with an overload condition of up to 400 MVA, is the first in this high voltage category to be filled with a renewable, vegetable-oil-based, natural ester fluid.

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