Characteristics of ACSR Conductors at High Temperatures and Stresses

Based on the stress-strain and temperature elongation data obtained on ACSR conductors, a new method of sag calculation is presented to provide improved accuracy at higher temperatures and mechanical loads. Permanent elongation of steel cores at loads above 50 per cent of conductor UTS is found to be an important factor in calculating both the temporary high-temperature sags and permanent sags after heavy loading of steel cores.