A software analysis system that mainly converts oil sampling data (Cw and TTS) into the average water content (Cp weight %) of the transformer cellulose materials. TRACONAL program based on Cp value, enables easy simulation and prediction of any operational state of the given transformer inclusive of the oil dielectric strength. Tracks degradation rate of the paper and suggests preventative measures. Easy, explicit and comprehensible moisture and dielectric diagnostic of power transformers. Records basic description of the dielectric behaviour of the transformer by means of TLC, the Temperature Loading Curve which corresponds to the change of the dielectric strength of the oil with the temperature of the transformer and further verification of the TLC by means of already and directly measured Ud values. Determines the amount of water to be removed. Estimates ageing intensity. Identifies potential sources of the decrease for the dielectric strength of the oil.