METHOD FOR DETERMINATION OF FIRE-HAZARDOUS ELECTRIC SYSTEMS IN HISTORICAL BUILDINGS

Abstract

The analysis of the emergency operation of electrical systems in buildings of historical urban development, in which the saturation of premises with technical life support systems has greatly increased, as a result of which the load of electrical systems and the release of thermal energy in areas with high transient resistances, has increased. Elements of protection against high transient resistances in electrical systems are not provided.

The proposed method makes it possible to determine an emergency electrical systems with a high transient resistance, which converts part of the electrical energy into heat, which leads to the ignition of electrical cables. It is based on comparing the magnitude of the voltage that is supplied to the input of the electrical systems under study, with the magnitude of the voltage at the output of this electrical systems at the terminals of the consumer's electrical appliance. This makes it possible to timely identify a possible electrical source of ignition, an electrical systems with high transient resistances sections, repair it in a timely manner or replace it with a new one, which will reduce the risk of a fire due to the thermal effect of electrical energy.