Strong breeze is a major natural disaster that leads to transmission line collapse. In order to reveal the causes of a transmission line tower collapse

the paper recaptures the transmission line fault and damage process based on the field investigation results

data collected by weather surveillance radar and analysis results from the mechanical model of the tower. The analysis results show that the disaster

characterized by discontinuity

multiple scales and small spatial-temporal scale of a strong disaster

tallies with the typical features of downburst in severe convective wind gust which is the direct cause of the collapse. The conclusion of fault analysis can provide a useful reference for the subsequent fault analysis under the same type of wind disaster and the study of transmission line failure mechanism under the action of a downburst.