Stilt

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

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
715.5 kcmil
Aluminium cross-section
363.27 mm²
Conductor cross-section
410.15 mm²
Number of aluminium wires
24
Diameter of aluminium wires
4.39 mm
Number of steel wires
7
Diameter of steel wires
2.92 mm
Diameter of steel core
8.76 mm
Conductor diameter
26.32 mm
Average geometric radius
0.01057 m
Aluminium content
1006.5 kg/km
Steel content
366.2 kg/km
Approximate weight
1372.7 kg/km
Nominal outer diameter
26.32 mm
Number of cores
1
Number of round wires
-

Electrical characteristics

Electrical characteristics

Max. DC resistance of the conductor at 20°C
0.0798 Ohm/km
Max. electric resisrance AC 60Hz 75°C
0.096 Ohm/km
Inductive reactance
0.3431 Ohm/km
Capacitive reactance
0.2067 MOhm.km
Ampacity
850.0 A

Mechanical characteristics

Mechanical characteristics

Rated breaking load (Class A)
11563 kgf
Rated breaking load (Class B)
11237 kgf
Hardness type
1350-H19

Usage characteristics

Usage characteristics

Length
1750 m
Reel net weight
2380 kg
Packaging
Reel 170/80

Resources

Resources

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