How does the oil-paper insulation system work in transformers?

The oil-paper insulation system in transformers functions by combining mineral oil and cellulose paper to provide electrical insulation and cooling. The mineral oil serves as a dielectric medium, preventing electrical breakdown, while also dissipating heat generated during operation. The cellulose paper, impregnated with oil, enhances dielectric strength and mechanical stability. This combination ensures reliable performance, longevity, and efficient heat management in power transformers, crucial for maintaining operational integrity and safety.