TY JOUR TI Justification for Protecting the Overhead Contact System of Urban Land Electric Transport from Low Short-Circuit Currents KW Urban electric transport KW overhead contact network protection KW short circuit KW energy recuperation KW monitoring JO Bulletin of scientific research results AU Agunov, A.V. AU Scherban', A.V. AU Arhipov, D.D. PY 2025 IS 2025 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"