XDALT 1x630 Cu/56 mm² 12/20kV

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XDALT 1x630 Cu/56 mm² 12/20kV

The XDALT family – 12/20 kV single-core aluminium-screened medium-voltage cables – is designed to ensure reliable performance in medium-voltage distribution networks. Thanks to their robustness, XLPE insulation, and high resistance to mechanical and environmental stresses, these cables guarantee long-term operation in underground installations and electrical infrastructures.

Nexans ref. : 10507123
EAN : 7611755557003

Datasheet PDF

Description

Standards

Product

HD 620; IEC 60502
National

ASE

Application

This family is designed for single-core medium-voltage connections in critical energy infrastructures:

Underground distribution networks
Installation in ducts and direct buried laying
Electrical substations and MV installations
Infrastructures requiring service continuity and reliability

Key advantages

XLPE insulation with high dielectric strength and low losses
Excellent mechanical and environmental properties
High durability for MV distribution networks
Suitable for direct burial, ducts, and dedicated cable routes
Radial watertightness ensured by bonded aluminium tape
Halogen-free
10.4% recycled copper / low-carbon aluminium, CO₂ footprint reduced by up to 40%

By choosing the XDALT – 12/20 kV single-core aluminium-screened MV cable range, you select a reliable, robust, and durable cable designed to meet the requirements of modern medium-voltage networks.

admissible load MV cables

Currents are indicative and given for normal service conditions.

Permanent charge 24h at 100% LF =1.0
Conductor temperature 90 ° C

For cable laid in earth in tubes

Depth of laying in soil : 1.0 m
Max. soil temperatureempérature : 20 °C
Soil thermal resistivity: 1.0 °C m/W

For cables placed in the open air

Max. air temperature : 30 °C
Protected from direct sunlight
laid on consoles or cable trays

Grounding:

at one end, in this case the induced voltage increases proportionally with the length of the
the link.

Attention, too high induced voltage can cause a breakdown of the outer sheath during overvoltages
transient.
Either at both ends, which generates circulating currents and therefore more or less acceptable losses..

Correction factor

If the terms of service differ from those set out above, allowable currents must be corrected
taking into account all the correction factors that apply to the installation and service conditions encountered.

Main factors to consider are the following:

Variable load, factor taking into account variable load, 10h to 100% and 14h to 60% LF= 0.627

Operating temperature
Ambient Temperature
Thermal soil resistivity, factor taking into account the thermal resistivity of the soil in [°C * m / W]
Magnetic armor

Our engineers are at your disposal to help and advise you.

Characteristics

Construction characteristics

Conductor flexibility

Class 2

Conductor material

Copper

Conductor shape

Round compacted

Dimensional characteristics

Conductor cross-section

630 mm²

Conductor diameter

30.9 mm

Average insulation thickness

4.8 mm

Diameter over insulation

43.5 mm

Screen section

56 mm²

Diameter over external conductor / metallic screen

46.4 mm

Average sheath thickness

2.2 mm

Nominal outer diameter

50.8 mm

Approximate weight

696.9 kg/100m

Number of cores

Electrical characteristics

Rated Voltage Uo/U (Um)

12/20 kV

Maximum operating voltage

24 kV

Max. DC resistance of the conductor at 20°C

0.0283 Ohm/km

I max. @ 60°C-buried, flat, spaced, earthing 1pt, LF1

710 A

I max. @ 60°C-buried, flat, spaced, earthing 2pts, LF1

521 A

I max. @ 90°C-buried, flat, spaced, earthing 1pt, LF1

914 A

I max. @ 90°C-buried, flat, spaced, earthing 2pts, LF1

700 A

I max. @ 60°C-buried, trefoil, joined, earthing 1pt, LF1

614 A

I max. @ 60°C-buried, trefoil, joined, earthing 2pts, LF1

594 A

I max. @ 90°C-buried, trefoil, joined, earthing 1pt, LF1

801 A

I max. @ 90°C-buried, trefoil, joined, earthing 2pts, LF1

779 A

I max. @ 60°C-in the air inside, flat, spaced, earthing 1pt, LF1

810 A

I max. @ 60°C-in the air inside, flat, spaced, earthing 2pts, LF1

744 A

I max. @ 90°C-in the air inside, flat, spaced, earthing 1pt, LF1

1178 A

I max. @ 90°C-in the air inside, flat, spaced, earthing 2pts, LF1

1096 A

I max. @ 60°C-in the air inside, trefoil, joined, earthing 1pt, LF1

792 A

I max. @ 60°C-in the air inside, trefoil, joined, earthing 2pts, LF1

769 A

I max. @ 90°C-in the air inside, trefoil, joined, earthing 1pt, LF1

1152 A

I max. @ 90°C-in the air inside, trefoil, joined, earthing 2pts, LF1

1124 A

Permissible short circuit current conductor 0.5s

128 kA

Permissible short circuit current conductor 1s

90.8 kA

Permissible short circuit current screen 0.5s

11.2 kA

Permissible short circuit current screen 1s

8.6 kA

A.C. Conductor resist. 50Hz and at 90 °C

0.036 Ohm/km

Nominal phase capacitance

0.513 µF / km

Nominal inductance

0.28 mH/km

Phase reactance 50 Hz - trefoil formation

0.09 Ohm/km

Impedance at 50Hz and 90°C

0.09 Ohm/km

Calorific Power

67.5 MJ/m

I max. @ 60°C-buried, trefoil, joined, earthing 1pt, LF0.627

677 A

I max. @ 90°C-buried, trefoil, joined, earthing 1pt, LF0.627

888 A

Mechanical characteristics

Maximum pulling force by laying

37.8 kN

Usage characteristics

Bending factor when laying

15 (xD)

Bending factor when installed

9 (xD)

Minimum installation temperature

-5 °C

Maximum operating temperature

90 °C

Short-circuit max. conductor temperature

250 °C

Fire load

18.8 kWh/m

XDALT 1x630 Cu/56 mm² 12/20kV

Description

Description

Standards

Application

Key advantages

admissible load MV cables

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Dimensional characteristics

Dimensional characteristics

Electrical characteristics

Electrical characteristics

Mechanical characteristics

Mechanical characteristics

Usage characteristics

Usage characteristics

Resources

Resources

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