M3N4LW 1*300/55//FAL

Description

Description

Standards

  • International
    IEC 60228; IEC 60332-1-2; IEC 60332-3; IEC 60502-2

1-SCOPE

This specification covers single core armoured cables.
 

2. CONSTRUCTION

2.1 Conductor

Plain, annealed electrolytic copper conductors, circular stranded,conforming to the applicable requirements of IEC 60228.

2.2 Insulation

Extruded inner semi conductive layer, XLPE insulation and  extruded outer semi conductive layer .

2.3 Metallic Screen Layer

Copper wires + Open Helix Copper Tape

2.4 Separation Sheath

Special PVC .

2.5 Metal Sheath

Polyester Tape + Lead

2.6 Armour

ALUMINUM WIRES .

2.7 Sheath

Special PVC with Anti-termites .

TEST AT WORKS FIRE RETARDANT MV CABLE ARMORED WITH LEAD SHEATH

Routine Tests

- Max. DC conductors resistance at 20°C acc. to IEC 60228 & IEC 60502-2 parag.16.1& 16.2  

- High voltage test acc. to IEC 60502-2  parag. 16.1& 16.4                                                          

- Max. partial discharge test  at 1.73 Uo acc. to IEC 60502-2  parag.16.1& 16.3  

( The test voltage shall be raised gradually to and held at 2U0 for 10s and than slowly reduced to 1.73U0).  

Liban Cables will carry out these tests on all the lengths and tests certificates will be provided

                                                                       

Sample Tests

- Check of the build - up and color coding of the cable

- Check of dimensions

            Insulation                      :           according to IEC 60502-2                       Parag.  17.5.2

            Metal sheath                 :           according to EEMUA 133                       Table    1

            Separation sheath         :           according to IEC 60502-2                       Parag.  17.5.3

            Armouring                     :           according to IEC 60502-2                      Parag.  17.7

            Oversheath                   :           according to IEC 60502-2                       Parag.  17.5.3

- Hot Set Test for XLPE insulation          according to IEC 60502-2                       Parag.  17.10

- Voltage test for 4 hours.          

 

These tests will be carried out on one length of each size during each inspection .

Tests certificates will be provided by Liban Cables

 

Type Tests

Mechanical characteristics on insulation and sheaths material (tensile strength and elongation at break  ) in accordance with IEC 60502-2.         

Fire retardance test according to IEC 60332-3.                                                               

These tests will be carried out on one length of the order .

Tests certificates will be provided by Liban Cables

drawing AWA+LEAD MV CABLE

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Copper
Conductor shape
Circular
Material of the inner semi-conductor
Extruded
Insulation
XLPE
Material of the external semi-conductor
Extruded fully bonded
Screen
Copper wires + copper tape
Lead Sheath
Yes
Armour type
Aluminium Wire
Outer sheath
Special PVC compound
Colour
Yellow

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
300 mm²
Conductor diameter
20.3 mm
Nominal insulation thickness
3.4 mm
Lead sheath thickness nominal
1.6 mm
Screen section
55 mm²
Nominal armour wire diameter
2.5 mm
Nominal outer sheath thickness
2.5 mm
Nominal outer diameter
47.0 mm
Approximate net weight
6731 kg/km

Electrical characteristics

Electrical characteristics

Test voltage
21 kV
Rated Voltage Uo/U (Um)
6 / 10 (12) kV
Perm current rating in air 30°C
735 A
Permissible current rating when buried
526 A
Max. DC resistance of the conductor at 20°C
0.0601 Ohm/km
A.C. Conductor resist. 50Hz and at 90 °C
0.0791 Ohm/km
Permissible short circuit current conductor 1s
43.4 kA
Maximal partial discharge test
10 pC
Thermal soil resistivity wet zone
1.5 °K.m/W

Mechanical characteristics

Mechanical characteristics

Cable flexibility
10xD
Mechanical resistance to impacts
Good

Usage characteristics

Usage characteristics

Laying depth, center of system
800 mm
Ambient air temperature
30 °C
Ambient ground temperature
20 °C
Max. conductor temperature in service
90 °C
Operating temperature, range
-25 - 55 °C
Short-circuit max. conductor temperature
250 °C
Fire retardant
IEC 60332-3-22 Cat.A
Resistant to termites
Yes

Resources

Resources

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