Measurement of Parameters for Transformer Insulating System Oil-Paper by Frequency Method

Experimental analysis and diagnostics of insulating system oil-paper for traction transformer by frequency method is presented in the paper. In the first part of the paper, the base theory about measurement and diagnostics insulating part (oil and paper) of transformers is described. In the other part of the paper, experimental results of the diagnostic measurement for the traction transformer at a constant temperature using to diagnostic method - frequency domain spectroscopy (FDS) are presented. This method is used for the analysis of insulating conditions of high-voltage equipment with insulating oil paper. Quality of paper moisture and oil conductivity of the transformer - before and after its drying was compared.