TY JOUR TI INCREASING THE PROTECTION EFFICIENCY OF 0.4 KV POWER TRANSMISSION LINES WITH BRANCH LINES FROM SINGLE-PHASE SHORT CIRCUITS DUE TO THE USE OF MULTI-CONTACT SWITCHING SYSTEM MSS-2-3 KW power supply KW power transmission line KW power line sectionalizing KW protective device sensitivity KW multi-contact switching system KW MKS-2-3 JO Vestnik of Kazan State Agrarian University AU Vinogradov, A.V. AU Vinogradova, A.V. AU Psarev, A.I. AU Lansberg, A.A. AU Bol'shev, V.E. PY 2020 IS 15 PB Kazan state agrarian University