ACSS

Aluminum Conductor, Steel Supported. Bare.
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Application

Southwire's ACSS/TW is designed for overhead distribution and transmission lines. It is designed to operate continuously at elevated temperatures up to 250°C without loss of strength, it sags less under emergency electrical loadings than ACSR/TW, excellent self-damping properties, and its final sags are not affected by long-term creep of aluminum. Southwire's ACSS/TW is available in equal area and equal diameter design. The equal area design allows equal ampacity in a smaller diameter conductor when compared with a standard ACSS conductor. The equal diameter design allows more ampacity in an equal diameter conductor when compared with a standard ACSS conductor. ACSS/TW also provides many design opportunities for new line construction: i.e., reduced tower cost, decreased sag, increased self-damping properties, increased operating temperature and improved corrosion resistance.

Specifications

measurement
imperial metric
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Conductor
No. of Conductors Size (AWG or kcmil) No. of Strands Nom. OD (mils) (mm) Nominal Total Weight (lbs/1000') (kgs/km) Allowable Ampacity
687947 0 0 336.4 KCMIL 336.4 KCMIL 26 26 720 18.29 462 688
478248 0 0 397.5 KCMIL 397.5 KCMIL 26 26 782 19.88 546 813
614771 0 0 477 KCMIL 477 KCMIL 30 30 882 22.42 746 1111
611930 0 0 556.5 KCMIL 556.5 KCMIL 26 26 926 23.54 765 1139
662053 0 0 605 KCMIL 605 KCMIL 26 26 965 24.53 831 1237
506022 0 0 636 KCMIL 636 KCMIL 26 26 990 25.16 874 1301
613183 0 0 666.6 KCMIL 666.6 KCMIL 24 24 1000 25.40 858 1277
612172 0 0 795 KCMIL 795 KCMIL 54 54 1091 27.73 1022 1521
610361 0 0 954 KCMIL 954 KCMIL 54 54 1196 30.38 1227 1826
606708 0 0 1033.5 KCMIL 1033.5 KCMIL 45 45 1212 30.78 1163 1730
612094 0 0 1113 KCMIL 1113 KCMIL 45 45 1258 31.97 1254 1865
611266 0 0 1192.5 KCMIL 1192.5 KCMIL 45 45 1302 33.08 1342 1998
611205 0 0 1272 KCMIL 1272 KCMIL 54 54 1381 35.09 1634 2431
678698 0 0 1351.5 KCMIL 1351.5 KCMIL 54 54 1423 36.16 1735 2582
611439 0 0 1590 KCMIL 1590 KCMIL 45 45 1503 38.20 1790 2664
602207 0 0 2156 KCMIL 2156 KCMIL 84 84 1762 44.76 2508 3732

Standards & References

Southwire's ACSS/TW conductor meets or exceeds the following ASTM specifications:

  • B500 Metallic Coated Stranded Steel Core for Aluminum Conductors, Steel Reinforced.
  • B609 Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes
  • B802 Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum Conductors, Steel Reinforced.
  • B803 High-Strength Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum and Aluminum-Alloy Conductors, Steel Reinforced.
  • B857 Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW).

Construction

ACSS is a composite concentric-lay-stranded conductor. Steel strands form the central core of the conductor with one or more layers of 63% minimum average conductivity aluminum 1350-0 wire stranded around it. The steel core carries most or all of the mechanical load of the conductor due to the "0" (fully annealed or soft) temper aluminum. Steel core wires are protected from corrosion by Galfan® , zinc-5% aluminum-mischmetal alloy coating. High strength steel core, aluminized, and aluminum clad steel core is also available.

Resources

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