Abstract:The impact of SF6 greenhouse gas on global climate change in electrical equipment is increasingly receiving attention. The new insulating medium, C5F10O, has become a research hotspot in this field due to its excellent environmental performance. C5F10O has a high liquefaction temperature and is not suitable for direct use in electrical equipment. It needs to be mixed with a buffer gas with a lower liquefaction temperature. The physicochemical properties, insulation properties, discharge decomposition properties, and compatibility with common metal materials inside electrical equipment of C5F10O mixed gases are summarized. It is found that C5F10O gas mixture have excellent decomposition characteristics, and by selecting a suitable mixing scheme and materials that are compatible with C5F10O,C5F10O gas mixture has the potential to be used as insulating medium in electrical equipment. At present, there are engineering demonstration applications of environmentally friendly C5F10O gas mixture insulating equipment at home and abroad. The relevant achievements can provide support for the expansion of C5F10O gas mixture equipment applications and promote the green and low-carbon transformation of energy industry in China.