Uninsulated conductor twisted with steel core and aluminum wires

AS: For transmission of electric power in overhead electric networks, used in I and II type atmospheric air provided that the content of sulphur trioxide in the atmosphere is not more than150mg/m2 per day (1.5mg/m3) and in all microclimatic regions of the land according to standard 15150-69. ASKP and ASKS: Used on the seashores, in industrial regions, salty sandy regions, as well as regions adjoining them in II and III type atmospheric air provided that the content of sulphur trioxide in the atmosphere is not more than150mg/m2 per day (1.5mg/m3) and Chlorine salt not more 200 mg/m2 ,in all microclimatic regions of the land according to standard 15150.The conductor is made by twisting of the steel conductor and aluminum wire. Regarding to the structure, the steel core is single-wire or twisted multi-wire. In case of twisting in layers, the twisting is performed in opposite directions.