TY JOUR TI Reduction of Economic Losses in the Contact Network and Overhead Lines Electrified with Alternating Current KW Transposition KW six-step transposition KW installation complex KW electromagnetic influence KW asymmetry KW burnout KW contact wire KW insulating coupling device KW step resistances KW overhead line KW contact network JO Proceedings of Petersburg Transport University AU Shevlyugin, M.V. AU Kulikov, A.A. AU Semenova, D.V. PY 2023 IS 20 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"