The TMGF series is a variant of the TMG hermetic distribution transformer with all-copper windings (the "F" suffix denotes the copper material, from Russian fol'ga). It provides somewhat lower load losses than the standard TMG with aluminium windings.
Critical loads where energy efficiency over the transformer's lifetime is a primary economic consideration — industrial plants with continuous operation, data centres, energy-intensive production.
Copper windings, hermetic tank, reduced no-load and load losses, longer service life under high loading conditions.