TY JOUR TI Diagnostics of Traction Motor Insulation by Partial Discharge Measuring Method KW Traction electric motor KW insulation KW partial discharges KW reliability of electric machines KW diagnostics of traction electric motors JO Proceedings of Petersburg Transport University AU Shrayber, M.A. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"