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Aluminum Alloy Conductor (AAC, ACSR, AAAC)
AAC, AAAC, ACSR conductors are part of the family of catenaries, transmission conductors and energy distribution conductors. These cables are also known by the following names: “homogeneous pure aluminum conductor” (AAC), “homogeneous aluminum alloy conductor” (AAAC) and “heterogeneous conductor of aluminum and zinc coated steel” (ACSR). These aluminum catenaries are used as power transmission and distribution lines. All aluminum conductors are made from single or multiple strands of aluminum wire, depending on their application.
AAC cable is a stranded conductor of refined aluminum with a metallic purity of at least 99.7%. AAC cables are mainly used in urban areas where spaces are tight and supports are close together. They can be used in coastal regions thanks to their high resistance to corrosion and are frequently used in the railway industries (rail and metro).
AAAC cables are used as bare conductors on overhead circuits that require better mechanical strength than that offered by AAC cables and better corrosion resistance than ACSR. The sag properties and strength-to-weight ratio of AAAC conductor cable are better than those of AAC and ACSR cables.
ACSR cable is available in different steel grades, at concentrations ranging from 6% to 40%, to achieve additional strength. High strength ACSR conductors are generally recommended for river crossings, overhead ground wires and very long distance installations. ACSR conductors can be manufactured with different levels of tensile strength, regardless of the other strength properties of the cable. Thus, a high tensile strength can be combined with a high lightness to be able to cover a longer distance with fewer supports. Thanks to the large diameter of the ACSR conductor, it is possible to increase the critical value of the “corona effect” also called “corona effect”, which is a valuable advantage on high and very high voltage overhead lines. Aluminum conductors are identifiable by their code, which differs depending on the size of the cable. Cable dimensions are expressed in AWG, and in cmill, kcmill and MCM.
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