XKDT-YT 3x1x240 Cu/35 mm² 12/20 kV

Description

Description

Standards

  • Product
    HD 620; IEC 60502
  • National
    ASE

Halogenfree three-core cables with copper conductors, cross-linked PE insulation (XLPE), copper-wire screens and triangular protection sheath for underground medium voltage 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 50 to 240 mm2

 
 

Construction three-core cables

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

 

Construction single core cables

  • Copper 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
Copper
Conductor shape
Round compacted

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
240 mm²
Conductor diameter
18.4 mm
Average insulation thickness
4.8 mm
Diameter over insulation
29.0 mm
Screen section
35 mm²
Diameter over external conductor / metallic screen
32.8 mm
Average sheath thickness
2.2 mm
Diameter over single-core cable
37.5 mm
Diameter over assembly
80.9 mm
Nominal outer sheath thickness
1.5 mm
Nominal outer diameter
84.4 mm
Approximate weight
976.1 kg/100m
Number of cores
3

Electrical characteristics

Electrical characteristics

Rated Voltage Uo/U (Um)
12 / 20 (24) kV
Maximum operating voltage
24 kV
Max. DC resistance of the conductor at 20°C
0.0754 Ohm/km
I max. @ 60°C-buried, trefoil, joined, earthing 1pt, LF1
373 A
I max. @ 60°C-buried, trefoil, joined, earthing 2pts, LF1
366 A
I max. @ 90°C-buried, trefoil, joined, earthing 1pt, LF1
481 A
I max. @ 90°C-buried, trefoil, joined, earthing 2pts, LF1
474 A
I max. @ 60°C-in the air inside, trefoil, joined, earthing 1pt, LF1
459 A
I max. @ 60°C-in the air inside, trefoil, joined, earthing 2pts, LF1
451 A
I max. @ 90°C-in the air inside, trefoil, joined, earthing 1pt, LF1
658 A
I max. @ 90°C-in the air inside, trefoil, joined, earthing 2pts, LF1
650 A
Permissible short circuit current conductor 0.5s
49 kA
Permissible short circuit current conductor 1s
34.8 kA
Permissible short circuit current screen 0.5s
6.4 kA
Permissible short circuit current screen 1s
4.7 kA
A.C. Conductor resist. 50Hz and at 90 °C
0.097 Ohm/km
Nominal phase capacitance
0.31 µF / km
Nominal inductance
0.34 mH/km
Phase reactance 50 Hz - trefoil formation
0.106 Ohm/km
Impedance at 50Hz and 90°C
0.14 Ohm/km

Mechanical characteristics

Mechanical characteristics

Maximum pulling force by laying
28.8 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

Documentation

Declaration of Performance

  • Declaration of Performance n� : 1000400-CHCD
  • Certification Date : 3/1/23
  • AVCP (Assessment and Verification of Constancy of Performance) : System 4
  • Declared performance : Fca

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