Influence of Overload Current on Elongation after Fracture and Percentage Reduction of Area for Copper Conductor

The effects of different overload current and power on time on the elongation after fracture and percentage reduction of area for copper conductor were studied, and the regression equations of overload current and elongation after fracture and percentage reduction of area for copper conductor were established. The results show that the elongation after fracture and percentage reduction of area decrease with the increase of the rated current. Under the same rated current, the elongation after fracture and percentage reduction of area for copper conductor decrease with the extension of power on time. The effect of electrified time on elongation after fracture and percentage reduction of area for copper conductor was less than that of current on elongation after fracture and percentage reduction of area for copper.