AAAC

AAAC
Brief Description:
This conductor is made from aluminium-magnesium-silicon alloy of high electrical conductivity containing enough magnesium silicide to give it better mechanical properties after treatment. These conductors are generally made out of aluminium alloy 6201. AAAC ConDUCTOR has a better corrosion resistance and better strength to weight ratio and improved electrical conductivity than ACSR ConDUCTOR on equal diameter basis.
Applications:
AAAC aluminum alloy conductors are extensively used for overhead distribution and transmission lines adjacent to ocean coastlines where there can be a problem of corrosion in the steel of an ACSR construction. The aluminum alloy conductors are used in place of single-layer ACSR conductors (i.e., #6 to #4/0 AWG) to reduce power losses in overhead distribution and transmission lines. The inductive effect of the ACSR's steel core is eliminated, hence increasing the operating efficiency of the line.
Construction:
Standard 6201-T81 high strength aluminum conductors, conforming to ASTM Specification B-399, are concentric-lay-stranded, similar in construction and appearance to 1350 grade aluminum conductors. Standard 6201 alloy conductors are similar to other alloy conductors commercially known as Ardival, Aldrey or Almelec. They were developed to fill the need for an economical conductor for overhead applications requiring higher strength than that obtainable with 1350 grade aluminum conductors, but without a steel core.
The DC resistance at 20"C of the 6201-T81 conductors and of the standard ACSR of the same diameter are approximately the same. Conductors of the 6201 J81 alloys are harder and, therefore, have a greater resistance to abrasion than conductors of 1350-H 19 grade aluminum.
Features and Benefits:
Aluminum alloy conductors have a number of advantages over the use of the ACSR or all aluminum conductors. Lower power losses than for equivalent single aluminum-
layer ACSR conductors. (The inductive effect of the steel core in the ACSR is eliminated).
• Simpler fittings than those required for ACSR.
• Excellent corrosion resistance in environments conducive to galvanic corrosion in ACSR.
• Strength and sag approximately the same as for equivalent 6/1 and 26/7 ACSR conductors.
• Outside diameters are the same as for standard ACSR conductors, permitting interchangeability of fittings.
• Greater resistance to abrasion than that for 1350 wires in all-aluminum or ACSR conductors.
Key Benefits:
· High tensile strength as compared to AAC conductor.
· Higher conductivity as compared to ACSR conductor.
· Better corrosion resistance than ACSR conductor.
Physical contents of alluminium alloy :
· Density - 2.70 kgm/dm3 at 20°C
· Coefficient of Linear Expansion - 23 x 10-6 / °C
· Resistivity - 0.0326 Ohms mm2/m at 20°C
· Constant Mass Temperature Coefficient (a) - 0.00360/ °C
· Material - Heat treated Al. Mg. Si. Alloy
Package:In coils, wooden drums, steel drums or steel-wooden drums.
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Code number
Area
Number of wires
Diameter
Linear mass
Rated strength
D.C resistance
Wire
Cond
mm2
mm
mm
kg/km
kN
Ohm/km
630
725
61
3.89
35
2000.7
213.9
0.0458
710
817
61
4.13
37.2
2254.8
241.07
0.0407
800
921
61
4.38
39.5
2540.6
271.62
0.0361
900
1036
91
3.81
41.8
2861.1
305.68
0.0321
1000
1151
91
4.01
44.1
3179.0
339.53
0.0289
1120
1289
91
4.25
46.7
3560.5
380.27
0.0258
1250
1439
91
4.49
49.4
3973.7
424.41
0.0231