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In this paper, the surface flashover characteristics of polytetrafluoroethylene (PTFE) under normal atmospheric pressure are studied. The DC power supply voltage is measured under the condition of different pole spacing, and the discharge voltage waveform and current waveform are recorded. In addition, under the same experimental conditions, the air breakdown voltage of the two electrode corresponding to the pole spacing is measured and compared with that of the Teflon surface flashover. The results show that the surface flashover voltage increases with the increase of the electrode spacing, but the surface flashover strength decreases. The surface flashover voltage of PTFE is much smaller than that of the air breakdown voltage, and the air breakdown field strength does not change with the change of the pole spacing.

Study on Surface Flashover of PTFE