What is the role of power oil in transformer oil for power transformers?

The role of power oil in transformer oil for power transformers is crucial for insulation and cooling. Power oil, typically mineral-based, provides electrical insulation to prevent arcing and dielectric breakdown. Additionally, it dissipates heat generated during operation, maintaining optimal temperature levels within the transformer. The chemical stability of power oil also ensures longevity and reliability, minimizing the risk of degradation and maintaining performance over time.