在球板电极下对CO2在不同气压、不同气隙距离下的工频击穿电压和雷电冲击电压进行测试和分析,并与同实验条件下的N2工频击穿电压进行了比较。结果表明:对于工频耐压实验,CO2的击穿电压值随气体压力和气隙距离的增加而增大;对于雷电冲击实验,气隙距离是影响CO2耐压水平的主要因素,气压对CO2绝缘性能的提升作用并不明显;在稍不均匀电场中,CO2的耐压水平约为N2的83%。
The breakdown voltage of CO2 was measured in the sphere-plate electrode at different air pres-sure and air gap under power frequency AC voltage and lightning impulse voltage, and then compared with the power frequency breakdown voltage of N2 under the same test condition. The results show that for the power frequency withstand voltage test, the breakdown voltage of CO2 increases with the increase of air pressure and air gap; for the lightning impulse withstand voltage test, the air gap is the main factor influencing the breakdown voltage of CO2, while the air pressure has little effect on promoting the insulating properties of CO2. In the slightly uneven field, the breakdown voltage of CO2 is about 83% of the N2.
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