what is the lowest dielectric strength of transformer oil which is acceptable to the pec?

The lowest acceptable dielectric strength of transformer oil, according to the Power Engineering Committee (PEC), is typically around 30 kV per centimeter. This value ensures that the oil can effectively insulate and prevent electrical breakdown under operational conditions. Maintaining dielectric strength above this threshold is crucial for the safe and reliable operation of transformers, as it helps to prevent failures and prolongs equipment life. Regular testing and maintenance of transformer oil are essential to ensure compliance with this standard.