TY JOUR TI TRENDS IN THE DEVELOPMENT OF ENERGY-EFFICIENT ELECTRICAL EQUIPMENT AND POWER CABLES KW electrical equipment KW development trends KW energy efficiency JO Modern Technologies and Scientific and Technological Progress AU Konovalov, Y.V. AU Nefedova, R.A. AU Nefedova, S.L. AU Smyshlyaev, V.V. PY 2026 IS 2026 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»