Multi-level Fire Alarming System for Urban High-Voltage Cable Tunnel

Abstract

At present, the research and applications about fire alarming of high-voltage cables tunnel focus on measuring various characteristics of fires through sensors such as smoke, various characteristic gases of fire, videos, etc., so that fire can be detected as soon as possible to avoid greater losses. In order to detect the fire as early as possible, it proposed to build a multi-level early alarm system. Firstly, it established an experimental platform, and found that the cable and it would emit particles with nanometer size during overheating and discharging, so, it presented a method for detecting hidden cable tunnel fire hazards based on thermal-released-particle detection, which can alarm several hours or several days before the fire occurs. Additionally, the CO sensor and other conventional sensors were also used, then a multi-level fire alarming system for high-voltage cable tunnel was introduced, by which the fire can be effectively alarmed in the whole process of fire development.