TY JOUR TI ANALYSIS THE REASONS OF 110 kV TRANSFORMERS BREAK DOWN AND THE METHODS OF ITS DIAGNOSTICS KW power transformer KW winding KW failure KW methods KW diagnostic tools KW service life. JO Vestnik of Kazan State Agrarian University AU Rybakov, L.M. AU Belov, V.V. AU Makarova, N.L. AU Ovchukova, S.A. AU Zahvataeva, A.O. AU Kirillov, N.K. AU Zaycev, P.V. PY 2018 IS 13 PB Kazan state agrarian University