Appendix A, Appendix B, Appendix C, and Appendix D of the "Inverter Emergency Power Supply (GB/T 21225-2007)" are normative appendices, while Appendix E is informative. The "Inverter Emergency Power Supply (GB/T 21225-2007)" was proposed by the China Electrical Industry Association. The "Inverter Emergency Power Supply (GB/T 21225-2007)" is under the jurisdiction of the National Power Electronics Standardization Technical Committee (SAC/TC 60). The drafting units of "Inverter Emergency Power Supply (GB/T 21225-2007)" are Qingdao Economic and Technological Development Zone Chuangtong Technology Development Co., Ltd., Dalian Guobiao Emergency Power Supply Co., Ltd., Qingdao Quality and Technical Supervision Bureau, China Architectural Design and Research Institute, Nanjing Guanya Power Equipment Co., Ltd., Shanghai Fudan Fuhua Technology Co., Ltd., Hefei Sunshine Power Supply Co., Ltd., and Xi'an Power Electronics Technology Research Institute. Five precautions for using inverters: When using inverters, there are five things to pay attention to. Operators must be cautious when using inverters: 1. The DC voltage of the inverters must be the same, and each inverter has a value for the connected DC voltage, such as 12V and 24V. The battery voltage must be the same as the DC voltage of the inverter, For example, if your battery is 12 volts, it is necessary to use a 12 volt inverter to convert AC power in order to use it; 2. The output power of the inverter must be greater than the applied power of the electrical appliances, especially for electrical appliances that compare power when turned on, such as refrigerators, air conditioners, etc; 3. The positive and negative terminals of the inverter must be connected correctly. The DC voltage connected to the inverter is clearly marked with positive and negative poles, with red indicating the positive pole {} and black indicating the negative pole {-}. The positive and negative poles are also marked on the battery. When the inverter is connected to the battery, the positive pole should be connected to the positive pole, and the negative pole should be connected to the negative pole. The connecting line must be thick and depends on the length of the connecting line; 4. The inverter must be placed in a well ventilated and non humid location to avoid getting wet by rain, and there should be a distance of about 20 centimeters between it and surrounding objects. It should be kept away from items that are prone to burning and blasting. Do not place or cover up other items on the inverter, and the temperature of the operating environment should not be higher than 40 ℃; 5. Charging and inverter cannot be carried out together, which means that the inverter cannot plug the charging plug into the electrical circuit output by the inverter during operation
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