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Description
Description
Standards
- 
                                            ProductCEI 20-68; HD 620; IEC 60502-2
Description
Single core cables with aluminium conductor, reduced thickness XLPE insulation, aluminium tape screen, double shock resistant PE sheath.
Application:
Suitable for fixed installation indoor or outdoor, laying in air or directly or indirectly buried. The two special sheaths provide 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).
- First sheath: extruded polyethylene (PE) compound.
- Second sheath: extruded polyethylene (PE) compound. Colour: red.
Functional characteristics
- Rated voltages U0/U: 12/20 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 
                                                            
                                                        
                                                                Inner sheath
                                                            
                                                            
                                                                Extruded PE compound - impacts resistant 
                                                            
                                                        
                                                                Outer sheath
                                                            
                                                            
                                                                Extruded PE compound - impacts resistant 
                                                            
                                                        
                                                                Sheath colour
                                                            
                                                            
                                                                Red 
                                                            
                                                        Dimensional characteristics
Dimensional characteristics
                                                                Number of cores
                                                            
                                                            
                                                                1 
                                                            
                                                        
                                                                Conductor cross-section
                                                            
                                                            
                                                                70 mm²
                                                            
                                                        
                                                                Conductor diameter
                                                            
                                                            
                                                                9.8 mm
                                                            
                                                        
                                                                Minimum insulation thickness
                                                            
                                                            
                                                                4.7 mm
                                                            
                                                        
                                                                Diameter over insulation
                                                            
                                                            
                                                                21.0 mm
                                                            
                                                        
                                                                Screen thickness
                                                            
                                                            
                                                                200 µm
                                                            
                                                        
                                                                Inner sheath thickness
                                                            
                                                            
                                                                2.0 mm
                                                            
                                                        
                                                                Nominal outer sheath thickness
                                                            
                                                            
                                                                2.0 mm
                                                            
                                                        
                                                                Nominal outer diameter
                                                            
                                                            
                                                                33.6 mm
                                                            
                                                        
                                                                Approximate weight
                                                            
                                                            
                                                                900 kg/km
                                                            
                                                        Electrical characteristics
Electrical characteristics
                                                                Rated Voltage Uo/U (Um)
                                                            
                                                            
                                                                12 / 20 (24) kV 
                                                            
                                                        
                                                                Max. DC resistance of the conductor at 20°C
                                                            
                                                            
                                                                0.443 Ohm/km
                                                            
                                                        
                                                                A.C. Conductor resist. 50Hz and at 90 °C
                                                            
                                                            
                                                                0.568 Ohm/km
                                                            
                                                        
                                                                Perm. current rating buried 20°C - trefoil formation
                                                            
                                                            
                                                                185 A
                                                            
                                                        
                                                                Perm. current rating in air 30°C - trefoil formation
                                                            
                                                            
                                                                235 A
                                                            
                                                        
                                                                Permissible short circuit current conductor 1s
                                                            
                                                            
                                                                6.6 kA
                                                            
                                                        
                                                                Permissible short circuit current screen 0.5s
                                                            
                                                            
                                                                1.6 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
                                                            
                                                        Resources
Resources
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