M5N3B 3*300

Description

Description

Standards

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

1-SCOPE

This specification covers three core armoured cables, rated at 12/20 (24) KV conforming to IEC 60502-2 Specifications.
 

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 tape on each core

 

2.4 Separation Sheath

PVC .

 

2.5 Armour

Two layers of black steel tape .
 

2.5 Sheath

PVC .
 

3. TESTS

All tests required by IEC 60502-2 either on Raw material or on finished products.

TEST AT WORKS according to IEC 60502-2 for armored cables

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

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

            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                  :           according to IEC 60502-2           Parag.  17.10

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.

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

Tests certificates will be provided by Liban Cables

MV layers

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Copper
Number of conductors
3
Conductor shape
Circular
Material of the inner semi-conductor
Extruded
Insulation
XLPE
Material of the external semi-conductor
Extruded strippable
Screen
Copper tape
Armour type
Steel tapes
Outer sheath
PVC
Colour
Red
Conductor flexibility
Class 2 IEC 60228

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
300 mm²
Conductor diameter
20.3 mm
Nominal insulation thickness
5.5 mm
Nominal outer sheath thickness
3.9 mm
Nominal outer diameter
85.0 mm
Approximate net weight
14048 kg/km

Electrical characteristics

Electrical characteristics

Test voltage
42 kV
Rated Voltage Uo/U (Um)
12 / 20 (24) kV
Perm current rating in air 30°C
599 A
Permissible current rating when buried
482 A
Max. DC resistance of the conductor at 20°C
0.0601 Ohm/km
A.C. Conductor resist. 50Hz and at 90 °C
0.0792 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
7xD
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
-15 ... 55 °C
Short-circuit max. conductor temperature
250 °C

Resources

Resources

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