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AS Trunk line
Bare conductors GOST 839-2019

AS

Bare aluminium conductor steel-reinforced (ACSR) for overhead lines

AS is the main conductor for trunk overhead power lines of all voltage classes. The steel core of galvanised steel wires provides high mechanical strength, while the aluminium wires in the outer layers provide the electrical conductivity. Designation breakdown: A – aluminium, S – steel core.

Conductor Al + steel
Cross-section 10 – 1000 mm²
Continuous t° +70°C
Standard GOST 839-2019
Request a price Size table

PRODUCT RANGE: AS

Sizes with actual technical specifications.

Cross-section Al/steel, mm²Diameter, mmWeight, kg/kmTensile strength, NDC resistance, Ω/km
AS 10/1.84.54240362.815
AS 16/2.75.66562131.777
AS 25/4.26.910092961.146
AS 35/6.28.4148135250.790
AS 50/8.09.6196176710.595
AS 70/1111.4274241300.422
AS 95/1613.5384333700.301
AS 120/1915.2471415220.244
AS 150/1916.8554463080.199
AS 150/2417.0599522800.200
AS 185/2418.8705580750.154
AS 185/2918.9728625660.157
AS 240/3221.6921750500.121
AS 300/3924.01132887600.096
AS 400/5127.514901178500.074
AS 500/6430.618521454400.060
Data are given for standard cross-sections per GOST 839-2019 (for A, AS, M, MG) or from the official TCG catalogue (AT3S, AERO-Z, see PDF pp. 28-30). Intermediate and non-standard cross-sections can be manufactured to special order.

Description of the AS conductor

AS is the most widely used conductor for trunk overhead power lines of all voltage classes from 35 to 750 kV. Its construction of a steel core and aluminium wires combines the high mechanical strength of steel (for long spans and heavy loads) with the good electrical conductivity of aluminium.

The AS designation includes two numbers separated by a slash: the first is the cross-section of the aluminium part (the electrical cross-section), the second is the cross-section of the steel core. For example, AS 240/32 means 240 mm² Al + 32 mm² steel. The Al/steel ratio is selected to suit the mechanical loads of the specific line: more steel for long spans and areas subject to ice loads.

Applications

Trunk overhead lines 35 – 750 kV
High-voltage overhead lines with long spans between supports
Overhead lines in areas with ice and wind loads
6-35 kV distribution networks where mechanical strength is required
Trunk power flows between substations

Construction

1

Steel core

Made of galvanised steel wires in a single-wire or multi-wire lay. Bears the main mechanical load.

2

Aluminium layers

One or more concentric layers of A5E aluminium wires. Carry the electric current.

3

Stranding

Adjacent Al layers are laid in opposite directions to resist unwinding.

Cross-section of AS – steel core in the centre + aluminium layers

Technical specifications

Conductor material A5E aluminium
Core material Galvanised steel
Cross-sections 10/1.8 ... 500/64 mm² (Al/steel)
Continuous temp. +70°C
Overload temp. +90°C
Service life 30+ years
Standard GOST 839-2019

Detailed technical specifications – see the TCG datasheet

Operating conditions

Installation temperature not below -20°C
Operating temperature -60°C … +50°C
Max. conductor t° (continuous) +70°C
Air humidity up to 98% at +35°C
Operating atmosphere types II, III (GOST 15150)
Service life 30+ years (standard), 45 years (AT series and AERO-Z)
Warranty 5 years
Climatic category UHL

DOCUMENTS

TCG product catalogue PDF, 31 MB
GOST 839-2019 PDF, 555 KB

REQUEST A PRICE

Specify the cross-section and quantity and we will prepare a proposal within 1 business day.

+998 (97) 748-80-00

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