N2XSY 8,7/15 kV 70 mm2 PH12

Description

Description

Application

Power distribution in medium voltage. As transformer feeders in substations. In power plants, industrial and operation installations, in residential areas and mining installations, in dry or wet locations.

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 wires.

6. Tape: Polyester.

7. Outer sheath: Compound polyvinyl chloride PVC.

Main characteristics

Excellent properties against heat aging. Resistance to abrasion, moisture and sunlight. Adequate resistance to greases and oils. Flame retardant.

Cross section:

From 25 mm2 up to 630 mm2.

Marking:

NEXANS INDECO S.A. N2XSY 8,7/15 kV - Section - PH(Screen section) - Year - Sequential length.

Packing:

Non returnable wooden reels.

Colour:

Insulation: Natural.

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 test.

IEC 60811-409: Mass loss test for thermoplastic insulations and covers.

IEC 60811-501: Test for determining the mechanical properties of insulating and sheating.

IEC 60811-502: Shrinkage test for isolations.

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

IEC 60811-505: Low temperature elongation test for insulations and covers.

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

IEC 60811-507: Hot elongation test for crosslinked materials.

IEC 60811-508: High temperature pressure tests for insulations and covers.

IEC 60811-509: Tests of resistance to cracking of the insulations and covers (thermal shock).

ICEA S-93-639: 5-46 kV Shielded Power Cable for Use in the Transmission and Distribution of Electric Energy. Section 9.4.2: Oil Immersion Test.

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

Calculation of Current Condition Single-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.
Screens bonded at both ends.

In the case of different conditions, the correction factors indicated by this standard must be applied.

RECOMMENDATION - M.V. CABLE ACCESSORIES

Technical information presented herein is for referential purposes. Actual dimensions and construction details will be available only with the test reports for each manufacturing order. For "Make To Stock" products it is recommended to measure relevant dimensions directly on the cable. Nexans will not assume responsibility for connector selection.

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Soft copper
Material of the inner semi-conductor
Extruded
Insulating material
XLPE-TR
Material of the external semi-conductor
Extruded strippable
Screen
Copper wires / 6mm²
Outer sheath
PVC
Sheath colour
Red
Lead free
Yes
Conductor flexibility
Class 2 IEC 60228
Conductor shape
Compact stranded

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
70 mm²
Screen section
12 mm²
Conductor diameter
9.5 mm
Diameter over insulation
19.6 mm
Diameter over screen
22.3 mm
Diameter over Sheath
25.1 mm
Approximate weight
1089 kg/km
Minimum insulation thickness
4.0 mm
Minimum outer sheath thickness
1.2 mm
Number of cores
1
Total number of wires
19

Electrical characteristics

Electrical characteristics

Rated Voltage Uo/U (Um)
8.7 / 15 (17.5) kV
Dielectric strength core to screen AC
30.5 kV
Time of application Dielectric strength core to screen AC
5 min.
Voltage for partial discharge test
15.0 kV
Maximal partial discharge test
10 pC
A.C. Conductor resist. at 90 °C - flat formation
0.3421 Ohm/km
A.C. Conductor resist. at 90 °C - trefoil formation
0.3423 Ohm/km
Impulse voltage
95 kV
Max. DC resistance of the conductor at 20°C
0.268 Ohm/km
Nominal capacitance
243.0 pF/m
Perm. current rating buried 20°C - flat formation
246 A
Perm. current rating buried 20°C - trefoil formation
239 A
Perm. current rating in air 30°C - flat formation
303 A
Perm. current rating in air 30°C - trefoil formation
296 A
Permissible short circuit current screen 0.5s
2.1 kA
Phase reactance 60 Hz - flat formation
0.2122 Ohm/km
Phase reactance 60 Hz - trefoil formation
0.1425 Ohm/km
Resistance of the screen
1.5 Ohm/km

Usage characteristics

Usage characteristics

Oil resistance
ICEA S-93-639
Flame retardant
IEC 60332-1-2; FT1
U.V resistance
UL 2556 - Sunlight Resistance
Maximum operating temperature
90 °C
Overload maximum core temperature
130 °C
Short-circuit max. conductor temperature
250 °C

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