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    • Last modified Dec 14, 2018
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N2XSEYRY 18/30 kV; for installation in vertical drilling mines

Description

Cable for underground power distribution and subtransmission.

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Description

Cable for underground power distribution and subtransmission.

Standards

International :  IEC 60228; IEC 60332-1-2; IEC 60502-2; IEC 60811-401; IEC 60811-402; IEC 60811-409; IEC 60811-501; IEC 60811-502; IEC 60811-504; IEC 60811-505; IEC 60811-506; IEC 60811-507; IEC 60811-508; IEC 60811-509
National :  NTP-IEC 60228; NTP-IEC 60502-2; UL 2556

Description

 

Application:

Underground power distribution and subtransmission. As transformer feeders in substations. In power plants, industrial and operation installations, in residential areas and mining installations, in dry or wet locations, where mechanical strength is required, for instalation in vertical drilling mines.

 

Construction:

1. Conductor: Compact stranded soft copper, class 2.

2. Inner semi-conductor: Extruded.

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

4. External semi-conductor: Extruded strippable.

These last three components extruded CV (continuous vulcanization) triple extrusion in Dry cure process.

5. Screen: Copper tapes.

6. Separation sheath: Compound polyvinyl chloride PVC.

7. Armour: Galvanized steel wires.

8. Tape: Polyester tape.

9. Outer sheath: Compound polyvinyl chloride PVC.

 

Main characteristics:

Excellent properties against heat aging. Its armour provides additional mechanical protection. Resistance to abrasion and moisture. Adequate resitance to greases and oils. Flame retardant.

Cross section:

95 mm2.

Marking:

INDECO S.A. N2XSEYRY 18/30 kV - Nb. cores x section - Year - Sequential length.

Packing:

Non returnable wooden reels.

Colour:

Insulation: Natural (Core identification with binder tapes: white, black, red).

Outer sheath: Red.

 

National standards

NTP-IEC 60228: Conductors of insulated cables.

NTP-IEC 60502-2: Power cables with extruded insulation and their accessories for rated voltages from 6 kV up to 30 kV.

International standards

IEC 60228: Conductors of insulated cables.

IEC 60502-2: Power cables with extruded insulation and their accessories for rated voltages from 6 kV up to 30 kV.

IEC 60332-1-2: Test for vertical flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame.

UL 2556: Wire and Cable Test Methods. Section 9.3: FT1 (Vertical-Specimen) Flame Test.

IEC 60811-401: Thermal ageing methods. Ageing in an air oven.

IEC 60811-402: Water absorption tests.

IEC 60811-409: Loss of mass test for thermoplastic insulations and sheaths.

IEC 60811-501: Test for determining the mechanical properties.

IEC 60811-502: Shrinkage test for insulations.

IEC 60811-504: Bending test at low temperature for insulation and sheaths.

IEC 60811-505: Elongation at low temperature for insulations and sheaths.

IEC 60811-506: Impact test at low temperature for insulations and sheaths.

IEC 60811-507: Hot set test for cross-linked materials.

IEC 60811-508: Pressure test at high temperature for insulation and sheaths.

IEC 60811-509: Test for resistance of insulations and sheaths to cracking.

UL 2556: Wire and Cable Test Methods. Section 4.2.8.5: Carbon-Arc and Xenon-Arc Tests- Sunlight resistance.

Characteristics

Construction characteristics
Conductor materialSoft copper
Material of the inner semi-conductorExtruded
Insulating materialXLPE-TR
Material of the external semi-conductorExtruded strippable
Individual screenCopper tapes helically applied
Armour typeGalvanized steel wires
Outer sheathPVC
Sheath colourRed
Lead freeYes
Electrical characteristics
Rated Voltage Uo/U (Um)18/30 kV
Dielectric strength core to screen DC, min.63.0kV
Time of application Dielectric strength core to screen DC5min.
Voltage for partial discharge test31.1kV
Maximal partial discharge test10pC
Impulse voltage170kV
Mechanical characteristics
Mechanical resistance to impactsGood
Usage characteristics
U.V resistanceUL 2556 - Sunlight Resistance
Flame retardantIEC 60332-1-2; FT1
Oil resistanceGood
Maximum operating temperature90°C
Overload maximum core temperature130°C
Short-circuit max. conductor temperature250°C
Specific characteristics
See all products
  • Number of cores
  • Conductor cross-section
  • Conductor diameter
  • Diameter over insulation
  • Diameter over screen
  • Diameter over armour
  • Diameter over Sheath
  • Approximate weight

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Selected item(s): Apply
Nexans ref. Name Nb. of cores Cross section (mm²) Conductor diam. (mm) Diam. over insulation (mm) Diam. over screen (mm) Diam. over armour (mm) Diam. over sheath (mm) Approx. weight (kg/km)
P00028117-1 N2XSEYRY 18/30 kV 3x95 mm2 3 95 11.5 27.2 28.8 79.0 85.2 10894
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Docs and info

Armor Conformation

Ref. Nexans

Formation
(mm2)

Armor

Nb
wires

Wire diameter (mm)

P00028117-1

3x95

52

3,15

Conditions for installation in vertical drilling mines

Ref. Nexans

Formation
(mm2)

Length (m)

S.F

P00028117-1

3x95

200

6

  • BENDING RADIUS INSTALLED IN M.V

    R=Dxf

    R:  Bending radius when installed (mm)

    D:  Diameter over sheath (mm)

    f:   Multiplicative factor; given the following table:

     

  • Calculation of Current Condition Multi-core M.V.

    CALCULATION OF CURRENT CONDITION BASED ON NTP-IEC 60502-2 Annex B

    Maximum conductor temperature: 90°C.
    Ambient air temperature: 30°C.
    Ground temperature: 20°C.
    Depth of laying: 0,8 m.
    Thermal resistivity of soil: 1,5 K.m/W.

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