TY JOUR TI Mathematical modeling of low-voltage electrical networks for assessing fire hazard parameters KW fire hazard KW low-voltage network KW non-sinusoidal KW load asymmetry KW higher harmonics of current KW current in the zero wire KW regulatory regulation JO Siberian Fire and Rescue Bulletin AU Kozlova, Y.S. AU Isaeva, O.L. PY 2026 IS 0 PB FSBEE HE Siberian Fire and Rescue Academy EMERCOM of Russia