The choice of explosion-proof electrical equipment must be compatible with the danger level of the explosive mixture. The so-called dangerous degree of explosive mixture refers to the group of explosion level and ignition temperature of explosive mixture. The selected explosion proof vfd electrical equipment must be compatible with the explosion level, group, and level of the hazardous area of the explosive mixture, otherwise safety cannot be guaranteed. In addition, if there are two or more explosive substances with different fire hazard levels in the same area, an explosion-proof structure that is compatible with the most dangerous explosion level and natural temperature level must be selected. In non-hazardous areas, ordinary electrical equipment is generally used. However, when containers containing explosive substances are placed in non-hazardous areas, there is also the possibility of danger under abnormal conditions. For example, dangerous substances are spilled due to corrosion of containers, or dangerous substances are released due to misoperation of operators, or high temperature and high pressure are formed due to abnormal reactions, which damage devices and containers and leak explosive substances. Therefore, the possibility of accidental hazards must be considered.
The choice of explosion-proof construction must be suitable for use in hazardous areas. What kind of explosion-proof structure must be used in the hazardous area of what nature. According to the explosion proof motor classifications, the explosion-proof performance is due to different structures, so the appropriate explosion-proof type must be selected according to the type of explosive substances, the type of equipment, and the degree of danger of the installation site. The selection of explosion-proof electrical equipment should not only consider the purchase and sale price, but also make a comprehensive analysis and balance of the reliability, life, operating costs, energy consumption and maintenance of the electrical equipment to select the most suitable and economical explosion-proof electrical equipment.
The explosion-proof performance is based on the standard environment as the basic condition. Explosion-proof electrical equipment is divided into "indoor use" and "outdoor use". Equipment used indoors is not suitable for outdoor use with an ambient temperature of 40°C. Equipment used outdoors should be adapted to the open-air environment, and measures such as protection from sunlight, rain and sandstorms are required. In addition, some equipment is used in corrosive or toxic environments, high temperature, high pressure or low temperature environments, and when selecting explosion-proof equipment, special requirements for adapting to these special environments should be considered.
After buying it from the power control equipment company, maintenance and care during use of explosion-proof electrical equipment is extremely important. The simpler the structure of the explosion-proof electrical equipment, the better. At the same time, pay attention to convenient management, short maintenance time, low cost, and normal storage of spare parts and spare parts.