Thermal Sag Behavior: Knee Points and Material Properties | Line Logic | TS Conductor

Different conductor types exhibit varying thermal sag behaviors based on their "knee point" temperature, where aluminum strands reach zero tension and transfer their load to the core. Traditional ACSR exhibits a knee point around 125°C but can't operate there due to aluminum strand damage, while ACSS shows a lower knee point (70-80°C) but experiences high sag above it due to steel's thermal expansion. TS AECC exhibits minimal thermal sag above its knee point (70-80°C) due to its carbon fiber core's extremely low thermal expansion coefficient.