силовой трансформатор power transformer 3 силовий трансформатор 3 648.3.048.1 2 the power transformer 2 621.3.017 1 621.3.018.32 1 621.3.018.783.3 1 Comsol 1 MATLAB/SIMULINK 1 Matlab/Simulink 1 a lapse 1 aging integral 1 anisotropic steel 1 computer model 1 determining the thermal state 1 diagnostic 1 efficiency 1 inrush current 1 insulation wearing out 1 isotropic steel 1 load capacity 1 losses in a magnetic conductor 1 magnetic field 1 mains transformer 1 mathematic model 1 models of technical condition and operating factors 1 moisture dynamics 1 new laminated cores 1 oil-paper insulation 1