TY JOUR TI FEATURES OF THE STANDARD FOR MODERN RELAY PROTECTION AND AUTOMATION TERMINALS KW IEC 61850 KW relay protection KW automation KW reliability KW efficiency JO Modern Technologies and Scientific and Technological Progress AU Konovalov, Y.V. AU Goncharenko, A.A. AU Goncharenko, R.A. AU Ivanov, I.S. PY 2026 IS 2026 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»