What is the electric field intensity of transformer oil in power transformers?

The electric field intensity of transformer oil in power transformers is a critical parameter that influences the insulation performance. Typically, transformer oil has a dielectric strength ranging from 10 to 30 kV/mm, depending on its purity and condition. The electric field intensity can be calculated based on the voltage applied and the distance between conductive parts, ensuring that it remains below the breakdown threshold to maintain effective insulation and prevent failures.