Description
Conductor formed by a steel core and aluminium wires layers.
Standards
National : ABNT NBR 7270/88Description
The use of Aluminium as a material for electrical conductors has greatly application mainly due to its good electrical properties. However, Aluminium conductors for most of transmission and distribution lines requires an additional mechanical support. Commonly it is used galvanized steel wires for cores of ACSR.
APPLICATIONS
Widely used as bare cable for overhead transmission lines and also as primary and secondary bare cable for distribution lines.
CONSTRUCTION
ACSR is concentrically stranded conductor with one or more layers of Aluminium wire hard-drawn 1350-H19 on the galvanized steel wire core. The core may be single wire or stranded depending on the size. Steel wire is available in Class A or B galvanization as corrosion protection.
ACSR is according to electrical and mechanical strength requirements of transmission or distribution lines, can provides an appropriate design combining the quantity of Aluminium and galvanized steel wires.
Conditions for Ampacity calculation
Conductor temperature = 75 °C;
Room temperature = 25 °C;
Wind speed = 1 m/sec, sunny.</P>
Characteristics
Construction characteristics | |
---|---|
Type of conductor | Circular, stranded |
Conductor material | aluminum / Steel Core |
Type of cable | Pigeon |
Dimensional characteristics | |
Conductor cross-section (AWG) | 3/0 |
Aluminium cross-section | 85.12mm² |
Conductor cross-section | 99.31mm² |
Number of aluminium wires | 6 |
Diameter of aluminium wires | 4.25mm |
Number of steel wires | 1 |
Diameter of steel wires | 4.25mm |
Conductor diameter | 12.75mm |
Average geometric radius | 0.00489m |
Aluminium content | 233.5kg/km |
Steel content | 110.4kg/km |
Approximate weight | 343.9kg/km |
Electrical characteristics | |
Max. DC resistance of the conductor at 20°C | 0.337Ohm/km |
Max. electric resisrance AC 60Hz 75°C | 0.474Ohm/km |
Inductive reactance | 0.4012Ohm/km |
Capacitive reactance | 0.2414MOhm.km |
Ampacity | 320.0A |
Mechanical characteristics | |
Rated breaking load (Class A) | 3000kgf |
Rated breaking load (Class B) | 2904kgf |
Hardness type | 1350-H19 |
Usage characteristics | |
Length | 1690m |
Reel net weight | 580.0kg |
Packaging | Reel 100/60 |