AAC (All Aluminium Conductor)
This kind of conductor is composed by one or more layer of pure aluminium AA1350-H19, hard drawn. The conductivity is 61%IACS. This kind of conductor has a very low value of specific mechanical resistance and it’s used for short lengths (for example next to the stations) and not for long spans.
This kind of conductor has a very good resistance to corrosion and his modulus of elasticity is characterized by a law that consider the formation of the conductor (number of wires and layers).
AAAC (All Aluminium Alloy Conductor)
The material used on these conductor is an aluminium alloy AA-6101. It’s a special alloy with Magnesium and Silicium with an excellent conductivity value (the average is 53%IACS).
The specific mechanical resistance is higher than AAC conductor (more or less the double), maintaining a high corrosion resistance.
Compared to ACSR, this kind of conductor is characterized by a lower diameter and the overloads due to the wind pressure are lower.