XDALT-YT 3x1x 50 Al/28 mm² 12/20 kV

Description

Description

Standards

  • Product
    HD 620; IEC 60502
  • National
    ASE

Applications

This family is designed for underground medium-voltage networks where effective earthing and a reliable screen are required:

  • 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
  • Assembly of three single-core cables
  • Outer sheath made of HDPE
  • 10.4% recycled copper / low-carbon aluminium, CO₂ footprint reduced by up to 40%

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

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor flexibility
Class 2
Conductor material
Aluminum
Conductor shape
Round compacted

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
50 mm²
Conductor diameter
8.1 mm
Average insulation thickness
4.8 mm
Diameter over insulation
18.7 mm
Screen section
28 mm²
Diameter over external conductor / metallic screen
21.1 mm
Average sheath thickness
1.5 mm
Nominal outer diameter
56.6 mm
Approximate weight
199.0 kg/100m
Number of cores
3

Electrical characteristics

Electrical characteristics

Rated Voltage Uo/U (Um)
12/20 kV
Maximum operating voltage
24 kV
Max. DC resistance of the conductor at 20°C
0.641 Ohm/km
Calorific Power
65.9 MJ/m
I max. @ 60°C-buried, trefoil, joined, earthing 1pt, LF1
113 A
I max. @ 60°C-buried, trefoil, joined, earthing 2pts, LF1
113 A
I max. @ 60°C-in the air inside, trefoil, joined, earthing 1pt, LF1
129 A
I max. @ 60°C-in the air inside, trefoil, joined, earthing 2pts, LF1
129 A
I max. @ 90°C-buried, trefoil, joined, earthing 1pt, LF1
145 A
I max. @ 90°C-buried, trefoil, joined, earthing 2pts, LF1
145 A
I max. @ 90°C-in the air inside, trefoil, joined, earthing 1pt, LF1
185 A
I max. @ 90°C-in the air inside, trefoil, joined, earthing 2pts, LF1
184 A
Impedance at 50Hz and 90°C
0.83 Ohm/km
Nominal inductance
0.42 mH/km
Nominal phase capacitance
0.178 µF / km
Permissible short circuit current conductor 0.5s
6.9 kA
Permissible short circuit current conductor 1s
4.9 kA
Permissible short circuit current screen 0.5s
5.6 kA
Permissible short circuit current screen 1s
4.3 kA
Phase reactance 50 Hz - trefoil formation
0.133 Ohm/km

Mechanical characteristics

Mechanical characteristics

Maximum pulling force by laying
3 kN

Usage characteristics

Usage characteristics

Minimum installation temperature
-5 °C
Bending factor when laying
12 (xD)
Bending factor when installed
8 (xD)
Maximum operating temperature
90 °C
Short-circuit max. conductor temperature
250 °C

Resources

Resources

Declaration of Performance

  • Declaration of Performance n° : 1000391-CHCD
  • Certification Date : 3/1/23
  • AVCP (Assessment and Verification of Constancy of Performance) : System 4
  • Declared performance : Fca

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