AAAC

AAAC / All Aluminum Alloy Conductor

All aluminum alloy Conductor (AAAC) is also called aluminum magnesium silicon alloy overhead Conductor, 110kV aluminum alloy stranded wire. Since it was put into production in 2008, the product quality has been relatively stable, the production efficiency is high, and the market share is high in the international market.

AAAC

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AAAC has high strength and good sag characteristics. AAAC is 21% ~ 26% lighter than ACSR, and its deformation tension is 21% ~ 23% lower. The tensile strength of AAAC is 1.7 ~ 1.8 times that of ordinary conductor. The ratio of total breaking force to weight per unit length of high strength all aluminum alloy stranded wire without strip core is more than 10km, which is higher than that of reinforced steel cored wire in the past (about 9km). Therefore, it can effectively reduce the height of the tower, or increase the erection spacing, and reduce the project investment.

Overhead Cover Final

Advantage:

  1. AAAC has large mechanical resistance than AAC which permits its use as a bare overhead conductor on aerial circuits for power transmission and distribution lines.
  2. AAAC has better sag characteristics and strength to weight ratio as compared to AAC.
  3. AAAC weight per unit and resistance is also lower which gives it advantage over the ACSR. Also, AAAC conductor has better corrosion protection than ASCR conductors.

AAAC All Standard

BS 3242

Code Name Nominal Area
(mm²)
Stranding
(No./mm)
Diameter Of Conductor
(mm)
Linear Mass
(kg/km)
Rated Strength
(kgf)
Box 15 7/1.85 5.55 51 537
Acacia 20 7/2.08 6.24 65 680
Almond 25 7/2.34 7.02 82 861
Cedar 30 7/2.54 7.62 97 1014
   35 7/2.77 8.31 115 1205
Fir 40 7/2.95 8.85 131 1367
Hazel 50 7/3.30 9.9 164 1711
Pine 60 7/3.61 10.83 196 2048
   70 7/3.91 11.73 230 2402
Willow 75 7/4.04 12.12 245 2565
   80 7/4.19 12.57 264 2758
   90 7/4.44 13.32 298 3112
Oak 100 7/4.65 13.95 325 3398
  100 19/2.82 14.1 326 3393
Mulberry 125 19/3.18 15.9 415 4312
Ash 150 19/3.48 17.4 497 5164
Elm 175 19/3.76 18.8 580 6030
Poplar 200 37/2.87 20.09 659 8841
  225 37/3.05 21.35 744 7724
Sycamore 250 37/3.22 22.54 835 8664
Upas 300 37/3.53 24.71 997 10350
Walnut 350 37/3.81 26.67 1162 12053
Yew 400 37/4.06 28.42 1319 13685
Totara 425 37/4.14 28.98 1372 14233
Rubus 500 61/3.50 31.5 1620 16771
Araucaria 700 61/4.14 37.26 2266 23450

DIN 48201

Nominal area
(mm^2)
actual area
(mm^2)
Stranding
(No.xmm)
Overall Diameter
(mm)
Weight
(kg/km)
Rated Strength
(KN)
Electrical
Resistance
(Ω/Km)
Current Rating*
(A)
16 15.89 7/1.70 5.1 43 4.44 2.0742 78
25 24.25 7/2.10 6.3 66 6.77 1.3593 102
35 34.36 7/2.50 7.5 94 9.6 0.9591 126
50 49.48 7/3.00 9 135 13.82 0.666 158
50 48.35 19/1.80 9 133 13.5 0.6849 156
70 65.81 19/2.10 10.5 181 18.38 0.5032 189
95 93.27 19/2.50 12.5 256 26.05 0.3551 234
120 116.99 19/2.80 14 322 32.68 0.2831 269
150 147.11 37/2.25 15.8 406 41.09 0.2256 309
185 181.62 37/2.50 17.5 500 50.73 0.1828 352
240 242.54 61/2.25 20.3 670 67.74 0.1371 420
300 299.43 61/2.50 22.5 827 83.63 0.111 477
400 400.14 61/2.89 26 1104 111.76 0.0831 568
500 499.83 61/3.23 29.1 1379 139.6 0.0665 649
625* 626.2 91/2.96 32.6 1732 174.9 0.0531 742
800* 802.09 91/3.35 36.9 2218 224.02 0.0415 857
1000* 999.71 91/3.74 41.1 2767 279.22 0.0333 971

BS EN50182

Code Stranding
(No.xmm)
Nominal Area
(mm^2)
Overall Diameter
(mm)
Weight
(kg/km)
Rated Strength
(KN)
Electrical
Resistance
(Ω/Km)
Current Rating*
(A)
Box 7/1.85 18.8 5.55 51.4 5.55 1.748 87
Acacia 7/2.08 23.8 6.24 64.9 7.02 1.3828 101
Almond 7/2.34 30.1 7.02 82.2 8.88 1.0926 116
Cedar 7/2.54 35.5 7.62 96.8 10.46 0.9273 129
Deodar 7/2.77 42.2 8.31 115.2 12.44 0.7797 143
Fir 7/2.95 47.8 8.85 130.6 14.11 0.6875 155
Hazel 7/3.30 59.9 9.9 163.4 17.66 0.5494 178
Pine 7/3.61 71.6 10.83 195.6 21.14 0.4591 199
Holly 7/3.91 84.1 11.73 229.5 24.79 0.3913 219
Willow 7/4.04 89.7 12.12 245 26.47 0.3665 228
Oak 7/4.65 118.9 13.95 324.5 35.07 0.2767 272
Mulberry 19/3.18 150.9 15.9 414.3 44.52 0.2192 314
Ash 19/3.48 180.7 17.4 496.1 53.31 0.183 351
Elm 19/3.76 211 18.8 579.2 62.24 0.1568 386
Poplar 37/2.87 239.4 20.09 659.4 70.61 0.1387 416
Sycamore 37/3.23 303.2 22.61 835.2 89.4 0.1095 480
Upas 37/3.53 362.1 24.71 997.5 106.82 0.0917 535
Yew 37/4.06 479 28.42 1319.6 141.31 0.0693 633
Totara 37/4.14 498.1 28.98 1372.1 146.93 0.0666 648
Rubus 61/3.50 586.9 31.5 1622 173.13 0.0567 714
Sorbus 61/3.71 659.4 33.39 1822.5 194.53 0.0505 764
Araucaria 61/4.14 821.1 37.26 2269.4 242.24 0.0406 868
Redwood 61/4.56 996.2 41.04 2753.2 293.88 0.0334 970

ASTM B399

Nominal Area Stranding
(No.xmm)
Overall Diameter
(mm)
Weight
(kg/km)
Rated Strength
(KN)
Electrical
Resistance
(Ω/Km)
Current Rating*
(A)
AWG&MCM mm^2
6 13.2 7/1.55 4.65 36.2 4.18 2.5361 69
4 21.1 7/1.96 5.88 57.9 6.69 1.586 93
2 33.5 7/2.47 7.41 92 10.6 0.9987 123
0 53.5 7/3.12 9.36 146.8 17 0.62592 165
2/0 67.3 7/3.50 10.5 184.8 20.4 0.49738 190
3/0 84.9 7/3.93 11.79 233 25.7 0.3945 219
4/0 107 7/4.42 13.26 294.7 32.5 0.31188 253
250 126 19/2.91 14.55 346.7 38.8 0.26509 280
300 152 19/3.19 15.95 416.7 46.6 0.22059 313
350 178 19/3.45 17.25 487.3 52 0.1886 345
400 203 19/3.69 18.45 557.5 59.5 0.16486 375
450 228 19/3.91 19.55 626 66.8 0.14683 402
500 253 19/4.12 20.6 695 74.2 0.13224 429
550 279 37/3.10 21.7 766.2 83.9 0.11995 455
600 303 37/3.23 22.61 831.9 91 0.11049 478
650 330 37/3.37 23.59 905.5 94.9 0.1015 504
700 354 37/3.49 24.43 971.2 101 0.09464 525
750 381 37/3.62 25.34 1045 109 0.08796 549
800 404 37/3.73 26.11 1109 116 0.08285 569
900 456 37/3.96 27.72 1250 131 0.07351 612
1000 508 37/4.18 29.26 1393 146 0.06597 653
1250 631 61/3.63 32.67 1732 179 0.05306 743
1500 759 61/3.98 35.82 2082 215 0.04414 827
1750 886 61/4.30 38.7 2431 251 0.03781 904

NFC 34125

Code Name Actual section
(mm²)
No. of wire Wire
diameter
(mm)
Conductor diameter
(mm)
Conductor weight
appr.
(kg/km)
Calc. breaking
force
(kN)
Conductor resistance at
20°C
(Ohm/km)
ASTER 22 21.99 7 2 6 60.2 7.15 1,498
ASTER 34.4 34.36 7 2.5 7.5 93.5 11.17 0.959
ASTER 54.6 54.55 7 3.15 9.45 148.9 17.73 0.604
ASTER 75.5 75.54 19 2.25 11.3 207.4 24.55 0.438
ASTER 117 116.98 19 2.8 14 321.2 38.02 0.283
ASTER 148 148.01 19 3.15 15.8 406.6 48.12 0.223
ASTER 181.6 181.62 37 2.5 17.5 500.3 59.03 0.183
ASTER 228 227.83 37 2.8 19.6 627.6 74.04 0.146
ASTER 288 288.34 37 3.15 22.1 794.3 93.71 0.115
ASTER 366 366.22 37 3.55 24.9 1.008.9 115.36 0.09
ASTER 570 570.22 61 3.45 31.1 1.576.0 185.33 0.058
ASTER 851 850.66 91 3.45 38 2.360.7 276.47 0.039
ASTER 1144 1143.5 91 4 44 3.173.4 360.22 0.029
ASTER 1600 1595.9 127 4 52 4.427.5 502.72 0.021

According to the French experience, the span is increased from 350m-400m to 550m, and the construction investment can be saved by 5% – 8% if the high-strength all aluminum alloy wire is used instead of ACSR in the new line;

High conductivity, large transmission capacity and small line loss. The conductivity of AAAC is 6% ~ 11% higher than that of corresponding ACSR, with lower AC impedance and 3% less line loss. When the ACSR is replaced by AAAC, the capacity of the transmission line can be increased without any modification or enhancement of the original supporting tower;

Good corrosion resistance. The steel strand in ACSR has the problem of electric corrosion in operation, especially in the polluted area. The aluminum alloy monofilament used by AAAC is more corrosion-resistant than ordinary aluminum, and AAAC has no steel core, so there is no electric corrosion problem of steel wire;

The surface is resistant to damage. The hardness of the aluminum alloy wire is twice that of the aluminum wire, which can reduce the surface scratch of the wire, improve the construction quality, and reduce the corona loss and radio interference level;

Good creep resistance, high elongation and high temperature characteristics. According to the standard value, the elongation of aluminum wire is 2 times of that of aluminum wire (1.5%), and the actual test value can reach 7% ~ 8%. It has excellent overload capacity and fatigue characteristics. At high temperature, the strength loss is small, and the high temperature operation plays the role of artificial aging, increasing the conductivity by 2% ~ 5%;

Good connectivity, simple and convenient connection. Large torque can be used without considering the cold deformation of conductor;

Compared with ACSR, AAAC has no steel core and is of the same material. Its recyclability is greatly improved and its recycling rate is high, which is beneficial to environmental protection.

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