XKDT-YT 3x1x240 Alrm / 35 CuK mm² 12/20kV

Description

Description

Standards

  • Product
    HD 620; IEC 60502
  • National
    ASE

Halogenfree three-core cables with aluminium conductors, cross-linked PE insulation ( XLPE), copper-wire screens and triangular protection sheath for medium voltage underground networks.
 

 

Applications

  • Underground distribution networks
  • Laying in tubes and direct buried
  • Arises in electrical substations

 
 

Key points

  • Nominal voltage 10 kV / 20 kV / 30 kV
  • Lead sections 95 to 400 mm2

 
 

Construction three-core cables

  • Assembly of 3 XLPE insulated single core cables
  • Outer HDPE-sheath
     

Construction single core cables

  • Aluminium conductor
  • Inner Semiconductor
  • Cross-linkend PE insulation (XLPE)
  • Outer semi-conductor
  • Semi-conductive swelling tape
  • Copper wire screen
  • Swelling tape
  • Outer PE sheath

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

Characteristics

Construction characteristics

Construction characteristics

Conductor flexibility
Class 2
Conductor material
Aluminum
Conductor shape
Round compacted

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
240 mm²
Conductor diameter
18.3 mm
Average insulation thickness
4.8 mm
Diameter over insulation
28.9 mm
Screen section
35 mm²
Diameter over external conductor / metallic screen
32.7 mm
Average sheath thickness
2.2 mm
Diameter over single-core cable
37.4 mm
Diameter over assembly
80.7 mm
Nominal outer sheath thickness
1.5 mm
Nominal outer diameter
84.2 mm
Approximate weight
526.2 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
0.125 Ohm/km
A.C. Conductor resist. 50Hz and at 90 °C
0.161 Ohm/km
I max. @ 60°C-buried, trefoil, joined, earthing 1pt, LF1
305 A
I max. @ 60°C-buried, trefoil, joined, earthing 2pts, LF1
301 A
I max. @ 60°C-in the air inside, trefoil, joined, earthing 1pt, LF1
359 A
I max. @ 60°C-in the air inside, trefoil, joined, earthing 2pts, LF1
355 A
I max. @ 90°C-buried, trefoil, joined, earthing 1pt, LF1
394 A
I max. @ 90°C-buried, trefoil, joined, earthing 2pts, LF1
390 A
I max. @ 90°C-in the air inside, trefoil, joined, earthing 1pt, LF1
514 A
I max. @ 90°C-in the air inside, trefoil, joined, earthing 2pts, LF1
509 A
Impedance at 50Hz and 90°C
0.18 Ohm/km
Nominal inductance
0.18 mH/km
Nominal phase capacitance
0.355 µF / km
Permissible short circuit current conductor 0.5s
32.5 kA
Permissible short circuit current conductor 1s
23.1 kA
Permissible short circuit current screen 0.5s
6.4 kA
Permissible short circuit current screen 1s
4.7 kA
Phase reactance 50 Hz - trefoil formation
0.106 Ohm/km

Mechanical characteristics

Mechanical characteristics

Maximum pulling force by laying
14.4 kN

Usage characteristics

Usage characteristics

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

Resources

Resources

Documentation

Declaration of Performance

  • Declaration of Performance n� : 1000399-CHCD
  • Certification Date : 3/1/23
  • AVCP (Assessment and Verification of Constancy of Performance) : System 4
  • Declared performance : Fca

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