Liquid dielectric transformers having a power handling capacity exceeding 10,000 kVA but not exceeding 40,000 kVA, power transformers for substations.

These heavy units need heavy-lift shipping, oil drained with nitrogen filling, and manufacturer-led installation and testing. Transformers and power electronics ship with bushings, radiators and terminals protected, on skids with lifting lugs; state kVA, voltage ratio, cooling class, vector group and efficiency level, provide routine and type test reports, and check destination rules such as EU Ecodesign, BIS and safety marks.