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EmailSThe aluminium wire armour (AWA) for single core cables and steel wire armour (SWA) for multicore cables provide robust mechanical protection making these 11kV cables suitable for direct burial in the ground. These armoured MV mains power cables are more commonly supplied with copper conductors but they are also available with aluminium conductors upon request to the same standard. The copper conductors are stranded (Class 2) whereas the aluminium conductors are compliant to the standard using both stranded and solid (Class 1) constructions.
Standards:
BS6622
IEC 60502
Characteristics :
Conductor: stranded plain annealed circular compacted copper conductors or aluminium conductor
Insulation: cross link polyethylene (XLPE)
Metallic Screen: individual or overall copper tape screen
Separator: copper tape with 10% overlap
Bedding: polyvinyl chloride (PVC)
Armouring: Steel Wire Armour (SWA), Steel Tape Armour (STA), Aluminium Wire Armour (AWA), Aluminium Tape Armour (ATA)
Sheath: PVC outer sheath
Sheath colour: Red or Black
Construction :
1.Conductor
Compact circular stranded copper conductor complying with BS6360 Class 2.
Conductor Screen
Extruded semi-conducting compound bonded to the insulation and applied in the same
operation as the insulation.
2.Insulation
Extruded cross-linked ployethylene (XLPE) suitable for operation at a conductor temperature of
90°C.
3.Insulation Screen
Extruded semi-conducting compound applied in the same operation as the insulation. Cold
strippable screens are supplied as a standard but fully bonded screens may be provided if
specified.
4.Metallic Screen
Copper tapes applied overlapped to provide an earth fault current path.
5.Laying Up
Three cores laid up with polypropylene string fillers to form a compact circular cable, and
bound with tape.
6.Tape Binder
7.Sheath
Extruded black polyvinyl chloride (PVC) or Low Smoke Zero Halogen (LSOH) compound is
supplied as standard. Alternative materials may be provided if specified.
8.Armouring
Single layer of galvanised circular steel wires.
9.Oversheath
Extruded black polyvinyl chloride (PVC) or Low Smoke Zero Halogen (LSOH) compound is
supplied as standard. Alternative materials may be provided if specified e.g medium density polyethylene (MDPE).
Electrical data:
Maximum conductor operating temperature: 90°C
Maximum screen operating temperature: 80°C
Maximum conductor temperature during S.C: 250°C
Current Ratings Conditions:
Ground Temperature 15°C
Ambient temperature (air) 25°C
Depth of burial 0.8m
Thermal resistance of soil 1.2°C m/W
Single-core -6/10 kV
| Nominal area conductor | Conductor diameter | Insulation thickness | Nominal overall diameter d | Maximum overall diameter | Approximate cable weight kg/km | Minimum bending radius | |
| mm2 | mm | mm | mm | mm | Cu | Al | mm |
| 1x 10 | 3.8 | 3.4 | 17.7 | 18.7 | 403 | 341 | 262 |
| 1x 16 | 4.7 | 3.4 | 19.5 | 20.6 | 581 | 482 | 289 |
| 1x 25 | 5.9 | 3.4 | 21.0 | 22.2 | 664 | 509 | 315 |
| 1x 35 | 7.0 | 3.4 | 22.8 | 23.8 | 819 | 602 | 330 |
| 1x 50 | 8.2 | 3.4 | 24.0 | 25.0 | 993 | 678 | 350 |
| 1x 70 | 9.9 | 3.4 | 25.7 | 26.7 | 1237 | 796 | 370 |
| 1x 95 | 11.5 | 3.4 | 27.3 | 28.3 | 1506 | 908 | 390 |
| 1×120 | 12.9 | 3.4 | 29.0 | 30.0 | 1798 | 1043 | 420 |
| 1×150 | 14.2 | 3.4 | 30.3 | 31.3 | 2113 | 1168 | 440 |
| 1×185 | 16.2 | 3.4 | 32.5 | 33.5 | 2508 | 1343 | 470 |
| 1×240 | 18.2 | 3.4 | 34.7 | 35.7 | 3088 | 1577 | 500 |
| 1×300 | 21.2 | 3.4 | 37.9 | 38.9 | 3802 | 1913 | 540 |
| 1×400 | 23.4 | 3.4 | 40.3 | 41.3 | 4806 | 2286 | 580 |
| 1×500 | 27.3 | 3.4 | 44.4 | 45.4 | 5871 | 2722 | 630 |
| 1×630 | 30.5 | 3.4 | 47.8 | 48.8 | 7187 | 3220 | 680 |
Three-cores-6/10 kV
| Nominal area conductor | Conductor diameter | Insulation thickness | Nominal overall diameter | Maximum overall diameter | Approximate cable weight kg/km | Minimum bending radius | |
| mm2 | mm | mm | mm | mm | Cu | Al | mm |
| 3x 10 | 3.8 | 3.4 | 34.7 | 35.7 | 1088 | 902 | 500 |
| 3x 16 | 4.7 | 3.4 | 37.2 | 38.2 | 1981 | 1683 | 535 |
| 3x 25 | 5.9 | 3.4 | 37.7 | 38.7 | 2058 | 1893 | 542 |
| 3x 35 | 7.0 | 3.4 | 45.2 | 46.2 | 3106 | 2456 | 640 |
| 3x 50 | 8.2 | 3.4 | 47.9 | 48.9 | 3739 | 2795 | 680 |
| 3x 70 | 9.9 | 3.4 | 51.8 | 52.8 | 4614 | 3292 | 740 |
| 3x 95 | 11.5 | 3.4 | 55.5 | 56.5 | 5611 | 3817 | 790 |
| 3×120 | 12.9 | 3.4 | 58.9 | 59.9 | 6620 | 4353 | 840 |
| 3×150 | 14.2 | 3.4 | 61.9 | 62.9 | 7722 | 4887 | 880 |
| 3×185 | 16.2 | 3.4 | 66.4 | 67.4 | 9115 | 5620 | 940 |
| 3×240 | 18.2 | 3.4 | 71.1 | 72.1 | 11108 | 6574 | 1010 |
Armoured three-cores-6/10 kV
| Nominal area conductor | Conductor diameter | Insulation thickness | Nominal overall diameter | Maximum overall diameter | Approximate cable weight kg/km | Minimum bending radius | |
| mm2 | mm | mm | mm | mm | Cu | Al | mm |
| 3x 10 | 3.8 | 3.4 | 38.0 | 39.1 | 1580 | 1394 | 547 |
| 3x 16 | 4.7 | 3.4 | 39.8 | 40.9 | 2876 | 2578 | 573 |
| 3x 25 | 5.9 | 3.4 | 45.2 | 46.3 | 3529 | 3064 | 648 |
| 3x 35 | 7.0 | 3.4 | 50.4 | 51.4 | 4358 | 3707 | 720 |
| 3x 50 | 8.2 | 3.4 | 53.1 | 54.1 | 5079 | 4135 | 760 |
| 3x 70 | 9.9 | 3.4 | 57.0 | 58.0 | 6055 | 4732 | 810 |
| 3x 95 | 11.5 | 3.4 | 60.7 | 61.7 | 7151 | 5356 | 860 |
| 3×120 | 12.9 | 3.4 | 63.9 | 64.9 | 8222 | 5955 | 910 |
| 3×150 | 14.2 | 3.4 | 66.9 | 67.9 | 9416 | 6582 | 950 |
| 3×185 | 16.2 | 3.4 | 71.6 | 72.6 | 10979 | 7484 | 1020 |
| 3×240 | 18.2 | 3.4 | 76.1 | 77.1 | 13042 | 8508 | 1080 |
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