тангенс кута діелектричних втрат 3 тангенс угла диэлектрических потерь 3 dielectric loss tangent 2 621.314 1 621.315.2 1 621.319 1 XLPE-cable 1 active conductivity 1 complex dielectric permittivity 1 current transformer 1 data processing procedure 1 diagnostics 1 effective electric capacitance 1 effective tangent of dielectric losses angle 1 high voltage insulation 1 high-voltage power cable 1 insulation losses 1 insulation system 1 loss factor 1 moisturizing cables 1 nonlinear substitution circuit 1 polymer insulation 1 power cable 1 processing procedure error 1 relaxation peaks 1 semiconductor coatings 1 solid and foamed polyethylene insulation 1 water clusters 1 water treeing 1 СПЕ-кабель 1