Australian standard AAAC Conductor(All Aluminum Alloy Conductor) Sulfur Silicon Selenium conductor

  Australian standard AAAC Conductor(All Aluminum Alloy Conductor) Sulfur Silicon Selenium

ALL ALUMINIUM ALLOY CONDUCTOR

General:

These conductors are formed by several aluminium alloy wires , stranded in concentric layers. The centre wire or wires which form the core are made of alloy. Normally the compositions of these conductors are the same as the ones pertaining to the aluminium-steel conductors. In the case of alloy conductors. all the wire have the same nominal diameter. The diameter of the alloy wires can be the same or different. The basic composition of this alloy pertains to the Aluminium-Magnesium-Silicon group. Which is also known in Europe as Almelec or Aldrey.After their drawing they must undergo a thermal treatment at a temperature of approximately 170°c.

Properties:

As regards aluminium ,the wires of this alloy have a double tensile strength .Its electrical conductivity is 15% lower(53% instead of 61%) and the weight is the same. By making use of these characteristics, in many cases an alloy conductor can replace the Aluminium Conductors Steel reinforced with a similar installation cost.

Main applications:

Low, medium ,high and very high voltages lines

CORROSION RESISTANCE:AAAC exhibits excellent corrosion resistance specially in sea coast

areas and in polluted industrial areas due to absence of steel core.

LOWER POWER LOSSES,Since AAAC is homogeneous (with all strands of Aluminium Alloy) with

no steel component the resistance of AAAC is lower as compared to ACSR.

HIGHER AMPACITY,AAAC can carry atleast 15-20% extra current as compared to ACSR of

equal size

LONGER LIFE:Experience in foreign countries shows that All Aluminium Alloy Conductors are

in service for over 60 years, which is about double the life of ACSR Conductors.

SURFACE HARDNESS,The surface hardness of AAAC is 80 BHN as compared to 35 BHN of

ACSR. This reduces the damage to surface during handling and therefore leading to lesser

corona losses and ratio interference at EHV.

THERMAL STABILITY,AAAC are stable upto 90oC against ACSR conductors which are st-

able upto 75oC.

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 sup-

ports and other accessories in transmission line system.