The cost of transformer oil varies depending on the type (e.g., mineral oil, synthetic ester, or natural ester), quality, and market conditions. Typically, prices range from a few dollars per liter for standard mineral oil to higher amounts for specialized or environmentally friendly oils like synthetic or natural esters. For a precise cost, it is advisable to consult with suppliers or check current market prices.

Dielectric oil performs the function of electrical insulation and cooling in high-voltage equipment like transformers. It prevents electrical discharges between components by providing a stable, non-conductive medium. Additionally, dielectric oil helps dissipate heat generated during operation, maintaining the equipment’s temperature and ensuring its efficient and safe performance.