What is the dielectric constant of transformer oil?

The dielectric constant of transformer oil typically ranges between 2.2 and 2.5, depending on the specific formulation and additives used. This property is essential as it reflects the oil’s ability to insulate and prevent electrical breakdown between conductive elements in transformers. A higher dielectric constant indicates better insulating properties, crucial for safe and efficient transformer operation. Regular testing of transformer oil for its dielectric constant is vital to monitor the health and performance of electrical equipment, ensuring it meets the necessary operational standards and reduces the risk of failures.