%0 Journal Article %T COMPLEX ESTIMATE OF RELAY PROTECTION OPERATION OF AC TRACTION CIRCUIT %A Pinchukov, P.S. %A Makasheva, S.I. %A Kostin, A.P. %K system, traction power supply, relay protection, alternating current, heavy-freight motion, short circuit, transient resistance %J Bulletin of Bryansk state technical university %D 2020 %N 2020 %P 11 %I Bryansk State Technical University