Material Shape
Round Wire
Range of Application
Overhead
Certification
ISO9001, CE, UL, CCC
Specification
SATM/DIN/IEC
ACSS/TW,annealed Aluminium Conductors Steel Supported (ASTM B 857)
Construction
ACSS/TW, a nonhomogeneous conductor, is a trapezoidal shaped wire compact concentriclay- stranded conductor made from aluminum 1350-O wires and round, coated steel core wire(s). ACSS/TW conductors withequal area or equal diameter as compared to ACSS conductors are available for overhead lines. Steel wires are coated with Class A coating of zinc - 5% aluminum mischmetal alloy. Other Classes of coatings are also available for additional protection from corrosion. Standard, High, Extra and Ultra High Strength steel are also available.
Specifications
ACSS/TW conductors are manufactured in accordance with the ASTM specification B857.
Features
ACSS conductors are preferred over ACSR conductors for specific transmission line
applications:
With zinc - 5% aluminum mischmetal alloy coating on steel wires, ACSS conductors can be operated
up to 250 °C.
ACSS conductors carry more current than ACSR conductors due to:
-- Minimum average conductivity of 63% IACS for 1350-O aluminum wires vs. an average conductivity of 61.2% for 1350-H19 aluminum wires in ACSR.
-- ACSS conductors can be operated up to 250 °C vs. the maximum operating temperature for an ACSR conductor does not exceed 100 °C.
ACSS conductors are prone to resist the effects of aeolian vibration due to very little or no mechanical load on the annealed aluminum wires.
Long term creep is not a factor when designing with ACSS conductors. In addition, use of ACSS/TW with the equal area design allows equal ampacity in a conductor with approximately 10% smaller diameter over a standard ACSS with same area. This smaller diameter of equal area ACSS/TW conductors helps reduce the effects of ice and wind loading on the conductor.
Alternatively, use of ACSS/TW with equal diameter design provides a conductor in which the aluminum area is increased by approximately 20% - 25% over a standard ACSS with same diameter. This increase
in the cross-sectional area of the conductor reduces its ac resistance by about 15% - 20% and thus, increases its current carrying capacity by about 10%.
| Code | Size | Type | Stranding | Nominal Overall Diameter | Cross Section |
| Aluminum | Steel |
| AWG or kcmil | No. Al Wires | No. Al Layers | No. of Wires | Diameter | CDR | Steel Core | Al | Total |
| in | in | in2 |
| Flicker/ACSS/TW | 477.0 | 13 | 18 | 2 | 7 | 0.0940 | 0.78 | 0.2820 | 0.3748 | 0.4234 |
| Hawk/ACSS/TW | 477.0 | 16 | 18 | 2 | 7 | 0.1053 | 0.79 | 0.3159 | 0.3745 | 0.4355 |
| Parakeet/ACSS/TW | 556.5 | 13 | 18 | 2 | 7 | 0.1015 | 0.84 | 0.3045 | 0.4372 | 0.4938 |
| Dove/ACSS/TW | 556.5 | 16 | 20 | 2 | 7 | 0.1138 | 0.85 | 0.3414 | 0.4371 | 0.5083 |
| Rook/ACSS/TW | 636.0 | 13 | 18 | 2 | 7 | 0.1085 | 0.89 | 0.3255 | 0.4994 | 0.5641 |
| Grosbeak/ACSS/TW | 636.0 | 16 | 20 | 2 | 7 | 0.1216 | 0.91 | 0.3648 | 0.4996 | 0.5809 |
| Tern/ACSS/TW | 795.0 | 7 | 17 | 2 | 7 | 0.0888 | 0.96 | 0.2664 | 0.6247 | 0.6680 |
| Puffin/ACSS/TW | 795.0 | 11 | 21 | 2 | 7 | 0.1108 | 0.98 | 0.3324 | 0.6241 | 0.6916 |
| Condor/ACSS/TW | 795.0 | 13 | 21 | 2 | 7 | 0.1213 | 0.99 | 0.3639 | 0.6242 | 0.7051 |
| Drake/ACSS/TW | 795.0 | 16 | 20 | 2 | 7 | 0.1360 | 1.01 | 0.4080 | 0.6242 | 0.7259 |
| Phoenix/ACSS/TW | 954.0 | 5 | 30 | 3 | 7 | 0.0837 | 1.04 | 0.2511 | 0.7497 | 0.7882 |
| Rail/ACSS/TW | 954.0 | 7 | 32 | 3 | 7 | 0.0971 | 1.06 | 0.2913 | 0.7493 | 0.8011 |
| Cardinal/ACSS/TW | 954.0 | 13 | 21 | 2 | 7 | 0.1329 | 1.08 | 0.3987 | 0.7492 | 0.8463 |
| Snowbird/ACSS/TW | 1033.5 | 5 | 30 | 3 | 7 | 0.0871 | 1.09 | 0.2613 | 0.8115 | 0.8532 |
| Ortolan/ACSS/TW | 1033.5 | 7 | 33 | 3 | 7 | 0.1010 | 1.10 | 0.3030 | 0.8112 | 0.8673 |
| Curlew/ACSS/TW | 1033.5 | 13 | 21 | 2 | 7 | 0.1383 | 1.13 | 0.4149 | 0.8118 | 0.9170 |
| Avocet/ACSS/TW | 1113.0 | 5 | 30 | 3 | 7 | 0.0904 | 1.13 | 0.2712 | 0.8737 | 0.9186 |
| Bluejay/ACSS/TW | 1113.0 | 7 | 33 | 3 | 7 | 0.1049 | 1.14 | 0.3147 | 0.8746 | 0.9351 |
| Finch/ACSS/TW | 1113.0 | 13 | 39 | 3 | 19 | 0.0862 | 1.18 | 0.4310 | 0.8737 | 0.9845 |
| Oxbird/ACSS/TW | 1192.5 | 5 | 30 | 3 | 7 | 0.0936 | 1.17 | 0.2808 | 0.9361 | 0.9843 |
| Bunting/ACSS/TW | 1192.5 | 7 | 33 | 3 | 7 | 0.1086 | 1.18 | 0.3258 | 0.9368 | 1.0016 |
| Grackle/ACSS/TW | 1192.5 | 13 | 39 | 3 | 19 | 0.0892 | 1.22 | 0.4460 | 0.9369 | 1.0556 |
| Scissortail/ACSS/TW | 1272.0 | 5 | 30 | 3 | 7 | 0.0967 | 1.20 | 0.2901 | 0.9994 | 1.0508 |
| Bittern/ACSS/TW | 1272.0 | 7 | 33 | 3 | 7 | 0.1121 | 1.22 | 0.3363 | 0.9994 | 1.0685 |
| Pheasant/ACSS/TW | 1272.0 | 13 | 39 | 3 | 19 | 0.0921 | 1.26 | 0.4605 | 0.9987 | 1.1252 |
| Dipper/ACSS/TW | 1351.5 | 7 | 33 | 3 | 7 | 0.1155 | 1.25 | 0.3465 | 1.0616 | 1.1350 |
| Martin/ACSS/TW | 1351.5 | 13 | 39 | 3 | 19 | 0.0949 | 1.30 | 0.4745 | 1.0610 | 1.1954 |
| Bobolink/ACSS/TW | 1431.0 | 7 | 33 | 3 | 7 | 0.1189 | 1.29 | 0.3567 | 1.1243 | 1.2020 |
| Plover/ACSS/TW | 1431.0 | 13 | 39 | 3 | 19 | 0.0977 | 1.33 | 0.4885 | 1.1242 | 1.2666 |
| Lapwing/ACSS/TW | 1590.0 | 7 | 36 | 3 | 7 | 0.1253 | 1.36 | 0.3759 | 1.2488 | 1.3351 |
| Falcon/ACSS/TW | 1590.0 | 13 | 39 | 3 | 19 | 0.1030 | 1.40 | 0.5150 | 1.2483 | 1.4066 |
| Chukar/ACSS/TW | 1780.0 | 8 | 38 | 3 | 19 | 0.0874 | 1.45 | 0.4370 | 1.3982 | 1.5122 |
| Bluebird/ACSS/TW* | 2156.0 | 8 | 64 | 4 | 19 | 0.0961 | 1.61 | 0.4805 | 1.6934 | 1.8312 |
| Mohawk/ACSS/TW | 571.7 | 13 | 18 | 2 | 7 | 0.103 | 0.846 | 0.309 | 0.4489 | 0.5072 |
| Calumet/ACSS/TW | 565.3 | 16 | 20 | 2 | 7 | 0.1146 | 0.858 | 0.3438 | 0.4438 | 0.5161 |
| Mystic/ACSS/TW | 666.6 | 13 | 20 | 2 | 7 | 0.1111 | 0.913 | 0.3333 | 0.5236 | 0.5915 |
| Oswego/ACSS/TW | 664.8 | 16 | 20 | 2 | 7 | 0.1244 | 0.927 | 0.3732 | 0.5222 | 0.6073 |
| Maumee/ACSS/TW | 768.2 | 13 | 20 | 2 | 7 | 0.1195 | 0.977 | 0.3585 | 0.6032 | 0.6817 |
| Wabash/ACSS/TW | 762.8 | 16 | 20 | 2 | 7 | 0.1331 | 0.99 | 0.3993 | 0.5989 | 0.6963 |
| Kettle/ACSS/TW | 957.2 | 7 | 32 | 3 | 7 | 0.0973 | 1.06 | 0.2919 | 0.7518 | 0.8038 |
| Suwannee/ACSS/TW | 959.6 | 16 | 22 | 2 | 7 | 0.1493 | 1.108 | 0.4479 | 0.7539 | 0.8764 |
| Cheyenne/ACSS/TW | 1168.1 | 5 | 30 | 3 | 7 | 0.0926 | 1.155 | 0.2778 | 0.917 | 0.9642 |
| Genesee/ACSS/TW | 1158.0 | 7 | 33 | 3 | 7 | 0.1078 | 1.165 | 0.3234 | 0.9094 | 0.9732 |
| Hudson/ACSS/TW | 1158.4 | 13 | 26 | 2 | 7 | 0.1467 | 1.196 | 0.4401 | 0.9096 | 1.0279 |
| Catawba/ACSS/TW | 1272.0 | 5 | 30 | 3 | 7 | 0.0967 | 1.203 | 0.2901 | 0.9993 | 1.0507 |
| Nelson/ACSS/TW | 1257.1 | 7 | 35 | 3 | 7 | 0.1115 | 1.213 | 0.3345 | 0.9875 | 1.0558 |
| Yukon/ACSS/TW | 1233.6 | 13 | 38 | 3 | 19 | 0.091 | 1.25 | 0.455 | 0.9685 | 1.0921 |
| Truckee/ACSS/TW | 1372.5 | 5 | 30 | 3 | 7 | 0.1004 | 1.248 | 0.3012 | 1.0783 | 1.1337 |
| Mackenzie/ACSS/TW | 1359.7 | 7 | 36 | 3 | 7 | 0.1159 | 1.259 | 0.3477 | 1.0674 | 1.1413 |
| Thames/ACSS/TW | 1334.6 | 13 | 39 | 3 | 19 | 0.0944 | 1.29 | 0.472 | 1.0479 | 1.1808 |
| St.Croix/ACSS/TW | 1467.8 | 5 | 30 | 3 | 7 | 0.1041 | 1.292 | 0.3123 | 1.1532 | 1.2127 |
| Miramichi/ACSS/TW | 1455.3 | 7 | 36 | 3 | 7 | 0.12 | 1.299 | 0.36 | 1.1427 | 1.2219 |
| Merrimack/ACSS/TW | 1433.6 | 13 | 39 | 3 | 19 | 0.0978 | 1.34 | 0.489 | 1.1255 | 1.2682 |
| Platte/ACSS/TW | 1569.0 | 5 | 33 | 3 | 7 | 0.1074 | 1.334 | 0.3222 | 1.2328 | 1.2962 |
| Potomac/ACSS/TW | 1557.4 | 7 | 36 | 3 | 7 | 0.1241 | 1.345 | 0.3723 | 1.2237 | 1.3084 |
| Rio Grande/ACSS/TW | 1533.3 | 13 | 39 | 3 | 19 | 0.1012 | 1.379 | 0.506 | 1.2046 | 1.3574 |
| Schuylkill/ACSS/TW | 1657.4 | 7 | 36 | 3 | 7 | 0.128 | 1.386 | 0.384 | 1.3012 | 1.3912 |
| Pecos/ACSS/TW | 1622.0 | 13 | 39 | 3 | 19 | 0.1064 | 1.424 | 0.532 | 1.2736 | 1.4425 |
| Pee Dee/ACSS/TW | 1758.6 | 7 | 37 | 3 | 7 | 0.1319 | 1.431 | 0.3957 | 1.3811 | 1.4768 |
| James/ACSS/TW | 1730.6 | 13 | 39 | 3 | 19 | 0.1075 | 1.47 | 0.5375 | 1.3598 | 1.5322 |
| Athabaska/ACSS/TW | 1949.6 | 7 | 42 | 3 | 7 | 0.1392 | 1.504 | 0.4176 | 1.5318 | 1.6384 |
| Cumberland/ACSS/TW | 1926.9 | 13 | 42 | 3 | 19 | 0.1133 | 1.545 | 0.5665 | 1.5129 | 1.7044 |
| Santee/ACSS/TW* | 2627.3 | 8 | 64 | 4 | 19 | 0.1062 | 1.762 | 0.531 |
