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Description
Description
Standards
-
ProductCEI 20-68; HD 620; IEC 60502-2
Single core cables with aluminium conductor, reduced thickness XLPE insulation, aluminium tape screen, shock resistant PE outer sheath.
Application:
Suitable for fixed installation indoor or outdoor, laying in air or directly or indirectly buried. The special outer sheath provides an excellent protection against impacts and mechanical stress. Cables shock resistance has been evaluated by the abrasion and impact tests included in CEI 20-68 standard. This type of cable can be directly buried, without additional protections, because it is comparable to an armoured cable.
Construction:
- Conductor: stranded, compacted, round aluminium – Cl. 2 (IEC 60228).
- Conductor screen: extruded semiconducting compound.
- Insulation: extruded polyethylene (XLPE) compound.
- Insulation screen: extruded semiconducting compound – fully bonded.
- Longitudinal watertightness: semiconducting water blocking tape.
- Screen and radial watertightness: aluminium tape longitudinally applied (nominal thickness: 0,2 mm).
- Outer sheath: extruded polyethylene (PE) compound. Colour: red.
Functional characteristics:
- Rated voltages U0/U: 18/30 kV
- Max. operating temperature of conductor: 90°C
- Max. short circuit temperature of conductor: 250°C (max 5s)
- Max. short circuit temperature of screen: 150°C
- Min. installation temperature: -25°C
- Max. tensile strength on the conductor during installation: 50 N/mm2
- Min. bending radius during installation: 14 Dcable
Characteristics
Characteristics
Construction characteristics
Construction characteristics
Conductor material
Aluminum
Conductor shape
Round, stranded and compacted
Conductor flexibility
Class 2 acc. to IEC 60228
Material of the inner semi-conductor
Extruded semiconducting compound
Insulation
Extruded XLPE compound
Material of the external semi-conductor
Extruded semiconducting compound - fully bonded
Material used for longitudinal water tightness
Semiconducting swellable tape
Screen
Aluminium tape
Outer sheath
Extruded PE compound - impacts resistant
Sheath colour
Red
Dimensional characteristics
Dimensional characteristics
Number of cores
1
Conductor cross-section
630 mm²
Conductor diameter
30.0 mm
Minimum insulation thickness
6.2 mm
Diameter over insulation
44.5 mm
Screen thickness
200 µm
Nominal outer sheath thickness
4.0 mm
Nominal outer diameter
58.3 mm
Approximate weight
3360 kg/km
Electrical characteristics
Electrical characteristics
Rated Voltage Uo/U (Um)
18 / 30 (36) kV
Max. DC resistance of the conductor at 20°C
0.0469 Ohm/km
A.C. Conductor resist. 50Hz and at 90 °C
0.063 Ohm/km
Perm. current rating buried 20°C - trefoil formation
617 A
Perm. current rating in air 30°C - trefoil formation
918 A
Permissible short circuit current conductor 1s
59.5 kA
Permissible short circuit current screen 0.5s
2.9 kA
Thermal soil resistivity dry zone
1.5 °K.m/W
Grounding type
Solid bonding
Mechanical characteristics
Mechanical characteristics
Mechanical resistance to impacts
Shocks resistant, acc. to CEI 20-68
Usage characteristics
Usage characteristics
Laying depth, center of system
800 mm
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