Исследование тока утечки по струе тонкораспылённой воды из автоматической установки пожаротушения на электрооборудование под напряжением

Abstract

Purpose. The article is devoted to the safety issue of applying an automatic fine water spray suppression system for extinguishing fires of live electrical equipment. The study examined the worst-case scenario, in which fire suppression system is manually activated by an operator. The results of a series of experiments to determine the leakage current when discharging extinguishing agent from automatic fire suppression systems onto live electrical equipment are presented. Methods. To achieve the goal of the research the authors used analysis and experiment methods. Findings. An experimental study on automatic water spray fire suppression system was carried out, and as a result of the experiment the values of leakage current on the pumping unit body and nozzle-head were determined. Power and linear regression equations were obtained by the least squares method. Based on regression equations, diagrams of dependence of the leakage current value on the intensity (k-factor) supply of fine water spray to the nozzle-head and the pumping unit body were created. Research application field. The obtained experimental data confirm the possibility of safely using automatic suppression systems with fine water spray for live electrical equipment extinguishment while meeting certain values of the intensity of extinguishing agent supply. Conclusions. Based on the analysis of experimental data and the obtained regression equations, it can be concluded that the intensity of the extinguishing agent supply (k-factor) has a significant impact on the leakage current on the body of an automatic fire suppression system and nozzle-head.