In three phase electrical power distribution, ACSR Conductors must be designed to have low electrical impedance in order to assure that the power lost in the distribution of power is minimal. Impedance is a combination of two quantities: resistance and reactance. The resistances of China ASCR Conductors are tabulated for different conductor designs by the manufacturer at DC and AC frequency assuming specific operating temperatures. The reasons that resistance changes with frequency are largely due to the skin effect, the proximity effect, and hysteresis loss. Depending on the geometry of the conductor as differentiated by the conductor name, these phenomena have varying degrees of affecting the overall resistance in the conductor at AC vs DC frequency.
Often not tabulated with ACSR Cable is the electrical reactance of the conductor, which is due largely to the spacing between the other current carrying conductors and the conductor radius. The reactance of the conductor contributes significantly to the overall current that needs to travel through the line, and thus contributes to resistive losses in the line.
