TY JOUR TI Economic Efficiency Assessment of Automated Monitoring Systems for Oil Transformer Technical Condition in Railway Transport KW oil transformers; residual life; predictive maintenance of transformers; automated system; monitoring; diagnostics of technical condition; cost effectiveness of diagnostic systems; payback period of the diagnostic system. JO Transport automation research AU Nikischenkov, S.A. AU Kozmenkov, O.N. AU Safronova, I.A. PY 2025 IS 11 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"