power cables силові кабелі 9 cross-linked polyethylene insulation 4 зшито-поліетиленова ізоляція 3 621.315.2 2 621.319 2 system of linear algebraic equations 2 кабельні лінії 2 система лінійних алгебраїчних рівнянь 2 621.315 1 Q factor 1 aggregate measurements 1 aging factors and mechanisms 1 aging of paper impregnated insulation 1 aluminum conductive core 1 asymmetry 1 cable classification criteria 1 cable infrastructure 1 cable lines 1 certified test base 1 coefficient of irregularity of current distribution 1 commutation matrix 1 complex resistance 1 conductor 1 construction industry 1 contact potential difference 1 current frequency 1 current loading 1 current rating computation 1 dielectric loss angle tangent 1