Product Range Cables and Conductors Division

AAAC - All Aluminium Alloy Conductors

AAAC, which has been in use for several decades abroad, has been adopted now in India as well. The alloy is based on Aluminum - Magnesium - Silicon System (Al-Mg-Si). Aluminum Alloy Conductor is a generic name rather than the name of a particular conductor. The group generally includes:

  • AAAC - High strength comprising heat treatable aluminum alloy wires
  • AAAC - High Conductivity comprising of heat treatable aluminum alloy wires
  • Aluminum Conductor Alloy Reinforced comprising of EC grade aluminum wires and high strength aluminum alloy wires with adequate conductivity
  • Aerially Bunched Conductors comprising of compacted, bare-insulated, high strength aluminum alloy conductor as neutral messenger wire bunched with three to five insulated EC grade aluminum phase conductors and lighting conductors.

A New concept for Energy Conservation:
ADVANTAGES OF AAAC

  1. CORROSION RESISTANCE: AAAC exhibits excellent corrosion resistance especially in coastal and polluted industrial areas due to absence of steel core.
  2. LOWER POWER LOSSES: Since AAAC is homogeneous (with all strands of Aluminum Alloy) with no steel component, its resistance is lesser in comparison to that of ACSR of same size.
  3. HIGHER AMPACITY: AAAC can carry atleast 15-20% extra current as compared to ACSR of same size.
  4. LONGER LIFE:Experience in foreign countries shows that All Aluminum Alloy Conductors are in service for more than 60 years, which is about twice the life of ACSR Conductors.
  5. SURFACE HARDNESS: The surface hardness of AAAC is 80 BHN as compared to 35 BHN of ACSR. This reduces damage to its surface while handling, and therefore it leads to lesser corona losses and radio interference at EHV.
  6. THERMAL STABLITY: AAAC are stable upto 90˚C against ACSR which are stable upto 75˚C.
  7. HIGHER STRENGTH TO WEIGHT RATIO: Since AAAC has higher strength to weight ratio, span can be increased from 2 to 15% resulting in overall reduction of cost in towers / supports and other accessories in transmission line systems.
PHYSICAL PROPERTIES OF AAAC WIRES:

Melting Temperature : 662˚C
Density : 2.7 kg/dm³
Co-efficient of Linear
Expansion per ˚C : 23 x 10-6
Brinnell Hardness : 80 BHN
Elongation : Min. 4%
(present in 200 mm)
Electrical conductivity at 20˚C
In Percentage IACS
Standard : 53.0
Minimum : 52.6

Electrical resistivity at 20˚C

Standard : 0.0325 ohm-mm²/m
Maximum : 0.0328 ohm-mm²/m

Ultimate Tensile
Strength (Minimum) : 31.5 kg/ mm²

Modulus of elasticity in kg/ mm²
Initial : 5200 to 5600
Final : 6250 to 6450

ALL ALUMINIUM ALLOY CONDUCTORS (AAAC)
AS PER IS-398 PART- 4
Code Name Actual Area Stranding & Wire Diameter Approx. Overall Dia
meter
Approx. Mass Max. Calc. Resist. at 20°C Approx. Calc. Breaking Load
mm² No of Wires / mm mm kg/km Ω/km kN
Mole 15 3/2.50 5.39 40.15 2.304 4.33
Squirrel 22 7/2.00 6 60.16 1.541 6.45
Weasel 34 7/2.50 7.5 94 0.99 10.11
Rabbit 55 7/3.15 9.45 149.2 0.621 16.03
Recoon 80 7/3.81 11.43 218.26 0.425 23.41
Dog 100 7/4.26 12.78 272.86 0.339 29.26
Dog Up 125 19/2.89 14.45 342.51 0.2735 36.64
Coyote 148 19/3.15 15.75 406.91 0.2298 43.5
Wolf 173 19/3.40 17 474.02 0.1969 50.54
Wolf-Up 200 19/3.66 18.3 549.4 0.171 58.66
Panther 232 19/3.94 19.7 636.67 0.1471 68.05
Dog 100 7/4.26 12.78 272.86 0.339 29.26
Panther Up-1 288 37/3.15 22.05 794.05 0.1182 84.71
Panther Up-2 346 37/3.45 24.15 952.56 0.0984 101.58
Kundah 400 37/3.71 25.97 1101.63 0.0855 117.4
Zebra 465 37/4.00 28 1280.5 0.0734 136.38
Zebra-Up 525 61/3.31 29.79 1448.39 0.0651 146.03
Moose 570 61/3.45 31.05 1573.71 0.0598 158.66
Morkulla 604 61/3.55 31.95 1666 0.0568 167.99
Moose-Up 642 61/3.66 32.94 1771.36 0.0534 178.43
Morkulla-Up 695 61/3.81 34.29 1919.13 0.0492 193.25
Bersimis 767 61/4.00 36 2115.54 0.0446 213.01
 
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