Coot

Description

Description

Standards

  • Product
    ABNT NBR 7270/88

The use of Aluminium as a material for electrical conductors has greatly developed mainly due to its electrical properties. However, Aluminium conductors for most of transmission lines which spans are quite long, it is necessary 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.

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Type of cable
Coot
Type of conductor
Circular, stranded
Conductor material
aluminum / Steel Core
Conductor flexibility
-
Conductor shape
Circular non compacted

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
795 kcmil
Aluminium cross-section
402.71 mm²
Conductor cross-section
413.9 mm²
Number of aluminium wires
36
Diameter of aluminium wires
3.774 mm
Number of steel wires
1
Diameter of steel wires
3.774 mm
Diameter of steel core
3.77 mm
Conductor diameter
26.4 mm
Average geometric radius
0.01092 m
Aluminium content
1110.3 kg/km
Steel content
87 kg/km
Approximate weight
1197.3 kg/km
Nominal outer diameter
26.4 mm
Number of cores
1
Number of round wires
37

Electrical characteristics

Electrical characteristics

Max. DC resistance of the conductor at 20°C
0.071 Ohm/km
Max. electric resisrance AC 60Hz 75°C
0.085 Ohm/km
Inductive reactance
0.3407 Ohm/km
Capacitive reactance
0.2065 MOhm.km
Ampacity
890.0 A

Mechanical characteristics

Mechanical characteristics

Rated breaking load (Class A)
7593 kgf
Rated breaking load (Class B)
7516 kgf
Hardness type
1350-H19

Usage characteristics

Usage characteristics

Length
1840 m
Reel net weight
2200 kg
Packaging
Reel 170/100

Resources

Resources

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