The distinction between the steel cores of ACSR/AW and ACSR is this. Galvanized steel wire is twisted to create the steel core of ACSR. Bimetallic steel wire with an aluminum coating is used in ACSR/AW. The electrical aluminum is constantly extruded and coated on the high-strength steel wire using high temperature and high pressure, forming an 8um thick layer of aluminum-steel bonding penetration between the steel and aluminum. The aluminum and steel are distorted in the same proportion when the steel wire covered with the aluminum layer is repeatedly dragged by the light bimetal synchronous deforming machine, resulting in a more consistent and robust aluminum-steel bonding penetration layer.
The main difference between ACSR and AW and standard ACSR is in the core, where AW (aluminum clad steel) wires are used instead of galvanized steel wires. When compared, it often has superior qualities to those of a traditional conductor.
What distinguishes ACSR/AW from ACSR in particular?
1. Characteristics of electromechanical systems
Although ACSR/AW and ACSR share the same mechanical characteristics and structural dimensions, ACSR/AW weighs approximately 5% less per unit length than ACSR. We can deduce that while the vertical load of the former is approximately 5% less than the vertical load of the latter, the horizontal wind load of the two is equal.
At 20°C, ACSR/AW has a DC resistance that is approximately 3.2% lower than ACSR’s, and its guaranteed computed breaking force is approximately 5.5% lower than ACSR’s.
2. Resistance to corrosion
The atmosphere can cause galvanic corrosion to occur in above conductors. Electrochemical corrosion occurs in ACSR when the aluminum wire and coating on the steel core come into contact. The covering corrodes more quickly than aluminum due to its lower potential, while the steel core corrodes when exposed to the atmosphere. Furthermore, once the coating has completely corroded, the aluminum wire and steel core come into contact to generate electrochemical corrosion. Because aluminum has a lower potential than iron, this causes the aluminum wire to corrode once more.
Because of the strong metallurgical bond between the steel and aluminum in the aluminum-clad steel wire, the stranded wire’s single wires are all in contact with aluminum, preventing electrochemical corrosion between different metals. As a result, the corrosion rate of the wire in ACSR/AW can be significantly slowed down, extending its service life.
One could argue that the greatest benefit of ACSR/AW is its resistance to corrosion.
Post time: Mar-05-2024