STER - AAAC

AAAC (All Aluminium Alloy Conductors)-Several layers of aluminium alloy (generally Al-Mg-Si) stranded in concentic layers. Designed using a high strength aluminium alloy to achieve a high strength-to-weight ratio; affords better sag characteristics.

 
Application
 
Aluminium Alloy Conductors

All Aluminium Alloy Conductors - STER-AAAC™

All Aluminium Alloy Conductors (AAAC) are extensively used for primary and secondary transmission in bare overhead distribution and transmission lines (11 kV to 800 kV lines) and HV substations. Also, usable in highly polluted industrial areas and coastal regions due to corrosion resistance.

Advantage

AAAC has good corrosion resistance, however due to the absence of steel, its resistance is lower than ACSR. AAAC can carry 15-20% extra current and has a higher life span (60 years) as compared to ACSR of equal size (30 years). The surface hardness of AAAC is 80 BHN while ACSR has hardness 35 BHN. This reduces damage to the surface during handling, thereby leading to lesser corona losses and ratio interference at EHV. AAAC can be operated with stable temperature of 85°C against ACSR conductors which are stable upto 75°C. Since AAAC has higher strength-to-weight ratio, span can be increased by 2-15% resulting in overall reduction of cost in tower supports and other accessories in the transmission line system.

MANUFACTURING CAPABILITY
SR.NO DESCRIPTION RANGE
01 Conductor Area 10.6mm2 to 1095mm2 0.0164 in2 1.6973 in2
02 Conductor construction 7Al Alloy to 91 Al Alloy
03 Conductivity of Aluminium 52.5% to 53%
PHYSICAL PROPERTIES
At a temperature of 20°C (68°F), the density of hard-drawn aluminium has been taken as 2.703 g/cm3 (168.74 lb/cf).

 

SR. NO. CONDUCTOR CONSTRUCTION MODULUS OF MPA ELASTISITY* KSI LINEAR COEFFCIENT*
/OC /OF
01 7 Strands 62000 8992 23.0 X 10-6 12.8 X 10-6
02 19 Strands 60000 8702 23.0 X 10-6 12.8 X 10-6
03 37 Strands 57000 8267 23.0 X 10-6 12.8 X 10-6
04 61 Strands 55000 7977 23.0 X 10-6 12.8 X 10-6
SR. NO. DESCRIPTION RANGE
01 Permissible Temp in continuous operation 85°C 185°F
02 Temp in a short circuit (duration up to 5 s) 200°C 392°F
STANDARDS
IEC, BS, ASTM, CAN-CSA, DIN, IS, AS and relevant national and international standards.
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