What determines oil transformer price compared to dry-type units?

Oil transformer price is influenced by insulation system complexity, oil volume, tank construction, cooling equipment, and safety systems. Oil-filled transformers generally cost more in installation due to containment pits, fire protection, and oil handling, but are cheaper per MVA at higher ratings. Dry-type units avoid oil systems but become expensive at high voltage or power levels. Lifecycle cost, fire safety requirements, and environmental regulations strongly affect comparative pricing between oil and dry-type transformers.