240 mm2

Description

Description

Standards

  • Product
    IEC 60228 Class 2 ; IEC 60502-2

Premium Cable

Premium Nexans Medium Voltage Aluminum Power Cable meets all the requirements of the IEC 60502-2 Standard. It has a 1350 aluminum conductor, concentric stranded with humidity blocking, cross-linked polyethylene insulation (XLPE-TR), concentric neutral in copper wires, water blocking tapes before and after the neutral wires, polyethylene jacket, resistant to heat, solar rays, abrasion and humidity. Compounds free of hazardous substances (RoHS).

Application and Features

Power supply of 18/30(36) kV Medium Voltage circuits, mainly the connection between the feeder transformer and the electrical distribution network. Cables suitable for installation in outdoors exposed to sunlight, underground ducts, directly buried, in dry or wet locations.

Main features:

  • Directly buried installation, according to IEC 60502-2 standard.
  • Sunlight resistance, according to ICEA S-93-639 standard.
  • Cable designed to be permanently submerged in water according to the condition AD8, according to the test procedure of the NBR 14039 standard.

Construction

1. Conductor: Compacted Aluminum, class B with moisture blocking.

2. Internal semi-conductor: Extruded compound.

3. Insulation: Cross-linked polyethylene XLPE-TR (Tree retardant). 

4. External semi-conductor: Peelable extruded compound.

These last three components extruded in CV (continuous vulcanization) of triple extrusion in the dry curing process.

5. Concentric Neutral: Made up of copper wires N=16mm2, with water blocking tapes before and after the wires.

6. Outer jacket: LDPE compound resistant to heat, abrasion and humidity, resistant to solar rays (SR), black color.

Ampacity and Reactance Conditions

  • Ampacities of Three Single-Insulated Aluminum Conductors in Air Based on Conductor Temperatures of 90° C and Ambient Air Temperature of 30°C, trefoil configuration. According to IEC 60502-2, Table B.3.
  • Ampacities of Three Single-Insulated Aluminum Conductors Buried direct in the ground, Based on Ambient Earth Temperature of 20°C, Depth of layin of 0.8 m, Thermal resistivity of soil 1.5  K.m/W, Conductor Temperatures of 90°C, screens bonded at both ends According to IEC 60502-2, Table B.3.
  • Inductive Reactance  to 90°C, 60Hz, 3 conductors spaced 1 diameter. Trifoil and flat configuration.

NOTE:

  • The data reported here are nominal and are subject to tolerances according to standards and normal manufacturing practices.
  • Other configurations not specified in this catalog may be available under special request and minimum manufacturing quantitie.

RECOMMENDATIONS FOR THE SELECTION OF ACCESSORIES AND DUCTS

The technical information presented here is for reference purposes only. Actual dimensions and construction details will only be available with the test reports for each manufacturing order. For the selection of accessories and/or ducts, it is recommended to measure directly on the actual dimensions of the cable using the appropriate methods and instruments. Centelsa by Nexans will not assume any responsibility for the selection of such elements.

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Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Stranded aluminum
Conductor shape
Circular compacted
Conductor flexibility
Class 2
Insulation
TR-XLPE (Tree-Retardant Cross-linked Polyethylene)
Screen
Copper wire
Jacket material
LDPE

Dimensional characteristics

Dimensional characteristics

Total number of wires
37
Conductor cross-section
240 mm²
Conductor diameter
18.25 mm
Minimum insulation thickness
7.1 mm
Nominal outer diameter
43.21 mm
Approximate weight
1766.5 kg/km
Minimum outer sheath thickness
1.72 mm

Electrical characteristics

Electrical characteristics

Insulation Level
- %
Maximum operating voltage
18/30(36) kV
Dielectric strength core to screen AC
63.0 kV
Time of application Dielectric strength core to screen AC
5 min.
Maximal partial discharge test
10 pC
Max. DC resistance of the conductor at 20°C
0.124 Ohm/km
Max. Electrical Resistance AC 60Hz 90°C
0.163 Ohm/km
Nominal capacitance
228.2 pF/m
Perm current rating in air 30°C
502 A
Permissible current rating buried/duct 20°C - Trefoil formation
367 A
Phase reactance 60 Hz - flat formation
0.155 Ohm/km
Phase reactance 60 Hz - trefoil formation
0.137 Ohm/km

Mechanical characteristics

Mechanical characteristics

Maximum Pull Tension of Conductor
12 kN
Minimum repeated bending diameter
519 mm
Abrasion resistance
Excellent

Usage characteristics

Usage characteristics

Maximum operating temperature
90 °C
Overload maximum core temperature
130 °C
Short-circuit max. conductor temperature
250 °C
U.V resistance
ICEA S-93-639, (720 hours)
Oil resistance
No
Longitudinal water tightness
ICEA T-31-610
RoHS compliant
Yes
Water proof
AD8 according to ABNT NBR 14039
Flame retardant
IEC 60332-1-2

Resources

Resources

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