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Bare Conductor

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ACSS/TW-Aluminum Conductor Steel Supported Trapezoidal Wire

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ACSS/TW is a composite concentric-lay-stranded conductor. Steel strands form the central core of the conductor with two or more layers of trapezoidal aluminum 1350-0 wires stranded around it.
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Descriptions

ACSS/TW is a composite concentric-lay-stranded conductor. Steel strands form the central core of the conductor with two or more layers of trapezoidal aluminum 1350-0 wires 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 high strength steel core, aluminum clad steel core is also available.


ACSS/TW-Aluminum Conductor Steel Supported Trapezoidal Wire

Applications

ACSS/TW is used 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. 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 selfdamping properties, increased operating temperature and improved corrosion resistance.

Specifications

● ASTM B 857 Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW).

Technical Parameters of ASTM B 857 (1)

Code
Word 		Conductor Size Aluminum
Stranding 		Steel Core Stranding Nominal Mass Rated Strength Nominal Outside Diameter, Nominal DC Resistance at 20℃
No. of Aluminum Wires No. of
Layers 		No. of
Wires 		Individual Strand Wire Diameter GA2/ MA2 GA3/ MA3 AW2
MCM mm kg/km kN kN kN mm Ω/km
Partridge 266.8 18 2 7 2.002 519 39.59 43.15 37.36 14.73 0.2060
Oriole 336.4 17 2 7 2.690 783 65.83 72.50 63.16 17.53 0.1625
Flicker 477.0 18 2 7 2.388 911 57.82 63.16 55.60 19.81 0.1160
Hawk 477.0 18 2 7 2.675 975 69.39 76.06 66.28 20.07 0.1153
Hen 477.0 17 2 7 3.203 1110 93.41 100.97 89.40 21.08 0.1146
Parakeet 556.5 18 2 7 2.578 1062 67.61 73.84 64.94 21.34 0.0990
Dove 556.5 20 2 7 2.891 1137 80.95 88.52 77.84 21.59 0.0987
Rook 636.0 18 2 7 2.756 1217 76.95 84.51 74.28 22.61 0.0867
Grosbeak 636.0 20 2 7 3.089 1299 92.07 99.64 88.52 23.11 0.0863
Tern 795.0 17 2 7 2.250 1326 63.16 67.61 60.05 24.38 0.0697
Puffin 795.0 18 2 7 2.814 1449 84.07 91.63 81.40 24.89 0.0697
Condor 795.0 20 2 7 3.081 1518 96.52 103.64 92.96 25.15 0.0693
Drake 795.0 20 2 7 3.454 1623 115.20 124.54 108.53 25.65 0.0690
Mallard 795.0 22 2 19 2.482 1836 152.57 168.58 146.34 26.67 0.0688
Phoenix 954.0 30 3 7 2.126 1530 63.16 67.61 60.49 26.67 0.0587
Rail 954.0 32 3 7 2.466 1598 74.28 80.06 72.06 26.92 0.0583
Cardinal 954.0 20 2 7 3.376 1826 115.65 124.54 109.42 27.43 0.0577
Snowbird 1033.5 30 3 7 2.212 1658 68.50 72.95 65.83 27.69 0.0540
Ortolan 1033.5 32 3 7 2.565 1731 80.51 86.74 78.28 27.94 0.0540
Curlew 1033.5 21 2 7 3.513 1973 125.43 134.77 116.09 28.70 0.0533
Avocet 1113.0 30 3 7 2.296 1784 72.50 77.84 70.72 28.70 0.0500
Bluejay 1113.0 33 3 7 2.664 1864 86.74 93.41 84.07 28.96 0.0500
Finch 1113.0 38 3 19 2.189 2123 135.22 147.67 128.10 30.23 0.0497
Oxbird 1192.5 30 3 7 2.377 1912 77.84 83.18 75.62 29.72 0.0467
Bunting 1192.5 33 3 7 2.756 1997 92.96 100.08 90.29 29.97 0.0467
Grackle 1192.5 38 3 19 2.266 2275 145.00 157.90 137.00 30.99 0.0467
Scissortail 1272.0 30 3 7 2.456 2040 83.18 88.96 80.95 30.48 0.0440
Bittern 1272.0 35 3 7 2.847 2131 99.19 106.75 96.08 30.99 0.0437
Pheasant 1272.0 39 3 19 2.339 2425 151.68 165.91 145.89 32.00 0.0437
Dipper 1351.5 35 3 7 2.934 2263 105.42 113.42 102.30 32.00 0.0413
Martin 1351.5 39 3 19 2.410 2577 161.02 176.14 155.24 33.02 0.0410
Bobolink 1431.0 36 3 7 3.020 2397 111.64 120.10 108.09 32.77 0.0390

ASTM B 857 (2)

Code
Word 		Conductor Size Aluminum
Stranding 		Steel Core Stranding Nominal Mass Rated Strength Nominal Outside Diameter, Nominal DC Resistance at 20℃
No. of Aluminum Wires No. of
Layers 		No. of
Wires 		Individual Strand Wire Diameter GA2/ MA2 GA3/ MA3 AW2
MCM       mm kg/km kN kN kN mm Ω/km
Plover 1431.0 39 3 19 2.482 2729 170.80 186.37 164.13 34.04 0.0387
Lapwing 1590.0 36 3 7 3.183 2664 124.10 131.66 120.10 34.54 0.0350
Falcon 1590.0 42 3 19 2.616 3033 189.48 207.28 182.81 35.81 0.0350
Chukar 1780.0 37 3 19 2.220 3067 157.01 169.91 149.45 36.83 0.0313
Bluebird 2156.0 64 4 19 2.441 3738 187.26 202.38 181.03 40.89 0.0260

ASTM B 857 (3)

Code
Word 		Conductor Size Aluminum
Stranding 		Steel Core Stranding Nominal Mass Rated Strength Nominal Outside Diameter, Nominal DC Resistance at 20℃
No. of Aluminum Wires No. of
Layers 		No. of
Wires 		Individual Strand Wire Diameter GA2/ MA2 GA3/ MA3 AW2
MCM       mm kg/km kN kN kN mm Ω/km
Mohawk 571.7 18 2 7 2.616 1092 69.39 76.06 66.72 21.59 0.0963
Calumet 565.3 20 2 7 2.911 1155 81.84 89.85 78.73 21.84 0.0973
Mystic 666.6 20 2 7 2.822 1274 80.95 88.52 77.84 23.11 0.0827
Oswego 664.8 20 2 7 3.160 1359 96.52 104.08 92.96 23.62 0.0827
Maumee 768.2 20 2 7 3.035 1469 93.41 102.30 89.85 24.89 0.0717
Wabash 762.8 20 2 7 3.381 1558 110.76 119.21 104.08 25.15 0.0720
Kettle 957.2 32 3 7 2.471 1604 74.73 80.51 72.50 26.92 0.0583
Fraser 946.7 35 3 7 2.931 1696 93.85 101.86 90.29 27.43 0.0587
Columbia 966.2 21 2 7 3.399 1845 117.43 125.88 110.76 27.69 0.0573
Suwannee 959.6 22 2 7 3.792 1960 136.55 147.23 125.43 28.19 0.0573
— 1080.0 20 2 7 2.624 1802 84.07 90.74 81.84 28.70 0.0517
Cheyenne 1168.1 30 3 7 2.352 1873 76.51 81.40 74.28 29.46 0.0477
Genesee 1158.0 33 3 7 2.738 1945 91.18 98.30 88.52 29.72 0.0480
Hudson 1158.4 25 2 7 3.726 2214 138.33 149.01 127.66 30.48 0.0477
Catawba 1272.0 30 3 7 2.456 2040 83.18 88.96 80.95 30.48 0.0440
Nelson 1257.1 35 3 7 2.832 2107 98.30 105.86 95.19 30.73 0.0443
Yukon 1233.6 38 3 19 2.311 2357 147.67 161.46 142.34 31.75 0.0450
Truckee 1372.5 30 3 7 2.550 2201 89.85 95.63 87.18 31.75 0.0407

ASTM B 857 (4)

Code
Word 		Conductor Size Aluminum
Stranding 		Steel Core Stranding Nominal Mass Rated Strength Nominal Outside Diameter, Nominal DC Resistance at 20℃
No. of Aluminum Wires No. of
Layers 		No. of
Wires 		Individual Strand Wire Diameter GA2/ MA2 GA3/ MA3 AW2
MCM       mm kg/km kN kN kN mm Ω/km
Mackenzie 1359.7 36 3 7 2.944 2278 106.31 114.31 102.75 32.00 0.0410
Thames 1334.6 39 3 19 2.398 2546 159.24 173.92 153.46 32.77 0.0417
St.Croix 1467.8 33 3 7 2.644 2356 96.08 102.75 93.41 32.77 0.0380
Miramichi 1455.3 36 3 7 3.048 2439 113.87 120.54 110.31 33.02 0.0383
Merrimack 1433.6 39 3 19 2.484 2735 170.80 186.82 164.58 34.04 0.0387
Platte 1569.0 33 3 7 2.728 2516 102.75 109.42 99.64 33.78 0.0357
Potomac 1557.4 36 3 7 3.152 2610 121.43 128.99 117.87 34.29 0.0357
Rio Grande 1533.3 39 3 19 2.570 2925 183.26 200.16 176.14 35.05 0.0363
Schuylkil 1657.4 36 3 7 3.251 2777 129.44 137.44 125.43 35.31 0.0337
Pecos 1622.0 39 3 19 2.703 3132 200.16 219.29 192.60 36.07 0.0340
Pee Dee 1758.6 37 3 7 3.350 2946 137.44 145.89 130.77 36.32 0.0317
James 1730.6 39 3 19 2.731 3302 206.39 225.96 198.83 37.34 0.0320
Athabaska 1949.6 42 3 7 3.536 3269 152.57 162.35 141.00 38.10 0.0287
Cumberland 1926.9 42 3 19 2.878 3674 229.52 250.87 221.07 39.37 0.0287
Powder 2153.8 64 4 19 2.441 3735 187.26 202.38 181.03 40.64 0.0260
Santee 2627.3 64 4 19 2.697 4558 228.18 247.31 221.07 44.70 0.0213

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