Aluminium Conductors Steel Reinforced (ACSR conductors), as their name suggests, consist of a solid or stranded steel core surrounded by strands of Electrolytic grade aluminium. The steel core imparts high mechanical strength to ACSR conductors, which are therefore suitable to be used for river crossings, overhead transmission lines, installations involving extra long spans etc. For any given resistance, ACSR conductors can be manufactured having a wide range of tensile strength as per customer requirements. The principal advantages of these conductors are high tensile strength and high mechanical strength to weight ratio, and therefore they are used for longer spans with fewer supports and lesser sag at a given tension. ACSR is preferred for it’s capacity to withstand extreme wind loads. Due to the greater diameter of ACSR conductors corona losses are low, resulting in substantial savings in high as well as extra high voltage overhead transmission.