%0 Journal Article %T To the question of rail line maximum length determining at normal minimum value of insulation resistance in the function of the signal frequency of the rail circuit %A Leushin, V.B. %A Smirnova, L.B. %A Yusupov, R.R. %K rail line, rail circuit, operating mode, signal power, frequency of signal carrier waves %J Transport automation research %D 2018 %N 4 %P 14 %I FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"