Reliable Diagnostics of HV Transfromers Insulation for Safety Assurance of Power Transmission System. REDIATOOL - an European Research Project

Interest is increasing in replacing the traditional way for determining moisture content in pressboard and paper in insulation of power transformers, based on chemical analyses of oil, by new methods utilising dielectric response measurements. One of the main reasons driving ahead the development of the new techniques is related to the inferior accuracy of the former methodology, especially at lower temperatures.