силовий трансформатор power transformer 4 силовой трансформатор 3 621.3.017 1 621.3.018.32 1 621.3.018.783.3 1 648.3.048.1 1 ANFIS 1 aging integral 1 anisotropic steel 1 cellulose insulation 1 defect 1 determining the thermal state 1 diagnosis 1 efficiency 1 electrical equipment 1 fuzzy classifier 1 insulation wearing out 1 inter turn faults 1 isotropic steel 1 load capacity 1 losses in a magnetic conductor 1 mains transformer 1 modeling 1 models of technical condition and operating factors 1 negative sequence currents 1 new laminated cores 1 power transformers 1 prognosis 1 symmetrical components 1