TY JOUR TI MATHEMATICAL MODEL OF IGNITION OF COMBUSTIBLE SUBSTANCES BY METAL PARTICLES OBTAINED AT SHORT CIRCUIT IN ELECTRIC WIRING KW electrical devices KW short circuit KW fire KW wire KW thermal ignition source KW ignition criterion JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Bershadsky, L.A. AU Zgarbul, A.V. AU Khalyavinskaya, N.M. PY 2018 IS 2018 PB Saint-Petersburg University of State Fire Service of Emercom of Russia