What affects the price of an oil immersed transformer?

Price depends on MVA rating, voltage class, vector group, impedance, loss guarantees, insulation level, cooling class, accessories, and test scope. On load tap changers, specialized bushings, monitoring packages, and transport constraints can add substantial cost. Manufacturing lead time and commodity pricing for copper and electrical steel heavily influence quotations. Compliance with IEC or IEEE and local grid codes also adds engineering and certification cost.