With the rapid development of China's railway passenger transport industry, new centralized and fully-powered air-conditioned passenger trains are gradually replacing old passenger trains, and have now become the main body of cross-district passenger trains. In recent years, fire accidents and dangers caused by electrical systems have frequently occurred in air-conditioned passenger trains. The vehicle department has also found a large number of electrical fire hazards during the overhaul of air-conditioned passenger trains. Fire accidents and dangers and hidden dangers have brought a number of adverse effects on the normal railway transportation production. How to grasp the regularity of electric fires in air-conditioned passenger cars and improve the fire prevention and control capabilities of passenger cars has become the key, difficult, and key point in the current fire safety of passenger cars. The author talks about some superficial views. The main reason for the frequent occurrence of electrical fire hazards in air-conditioned buses is that the diversity of air-conditioned buses in terms of voltage, electricity, and power generation greatly increases the probability of occurrence of electrical fire hazards. General 22-type non-air-conditioned passenger car electric system is simple, and lighting fixtures, air-conditioning systems, electric stove, video broadcast, warm water tank, electronic display, axis temperature alarm, refrigerator, dining car exhaust fan and other electrical facilities, electricity load Large, many electrical connector points. Single-seat air-conditioned buses use the diesel generator set of the vehicle; all the air-conditioned buses are mostly powered by a generator car, and two main transmission lines are provided for the three-phase four-wire system. Complex transmission and distribution systems and the application of a large number of electrical facilities and equipment also increase the probability of failures. Some air-conditioned buses were not in compliance with regulations and standards when they were newly built or repaired, leaving hidden fire hazards. First of all, through the analysis of the causes of the fires and fire accidents of air-conditioned passenger trains that have occurred throughout the whole country in recent years, it has been found that the failures and poor insulation of electrical equipment in air-conditioned passenger cars caused by new and reduced-quality repairs are numerous and extremely harmful. Specific performance, the laying of electric lines does not meet the "Ministry of Railways" wiring rules for passenger cars. Some newly-built air-conditioned passenger cars have inadequate fastening of the wire joints, and different types of wires at the top of the passenger car's vehicle and with different voltage levels are bundled together, and there are problems such as no bushing protection line and excessive length of the power line.
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