TY JOUR TI Identification of the causes of contact wire fracture on the elements of sectionalizing devices using fractographic study and spectral analysis KW sectional insulator KW coupling KW arc-extinguishing horn KW contact wire KW fractographic study KW spectral analysis KW current collector JO Bulletin of scientific research results AU Tarabin, I.V. AU Murav'ev, D.V. AU Kremlev, I.A. AU Terehin, I.A. PY 2024 IS 2024 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"