What is the dielectric value of transformer oil in power transformers?

The dielectric value of transformer oil in power transformers is a critical parameter that indicates its insulating properties. Typically, the dielectric strength of transformer oil ranges from 30 to 70 kV per centimeter, depending on the oil’s purity and condition. This high dielectric value is essential for preventing electrical breakdown and ensuring the safe operation of power transformers under high voltage conditions. Regular testing of the dielectric value is necessary for maintenance.