6.35/11kV Cables
British Standard cables BS6622, BS7835, and BS7870-4.10 are manufactured in voltages including 6.35/11kV for power distribution networks.
The 6.35/11kV voltage is commonly associated with armoured cable - the aluminium wire armour (AWA) for single core cables and steel wire armour (SWA) for multicore cables providing robust mechanical protection that makes 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.
There are, of course, other medium voltage cables supplied at 6.35/11kV, including unarmoured cables under British Standard BS7870-4.10 which is more commonly used by the utilities networks, buried in the ground in cable ducts.
11kV cables construction
| BS6622 | BS7835 | BS7870-4.10 | |
|---|---|---|---|
| Conductor | Class 2 stranded copper or Class 1 solid /Class 2 stranded aluminium | ||
| Conductor Screen | Semi-conductive Cross-Linked Polyethylene (XLPE) | ||
| Insulation | XLPE | ||
| Insulation Screen | Semi-conductive XLPE | ||
| Metallic Screen | Overall copper tape and/or wires (Single core) or Individual copper tape (three core) | ||
| Filler (as required) | Polyethylene Terephthalate (PET) fibres | ||
| Separator | Binding Tape | ||
| Bedding | Polyvinyl Chloride (PVC) | Low Smoke Zero Halogen (LSZH) compound | N/A |
| Armour | Single core cable: Aluminium Wire Armour (AWA) Multicore cable: Steel Wire Armour (SWA) |
N/A | |
| Sheath | PVC or Medium Density Polyethylene (MDPE) | LSZH | MDPE or LSZH |
These British Standard BS6622, BS7835 armoured and BS7870-4.10 unarmoured cables are also available in 19/33kV voltage. Please refer to the PDF specification sheets for further information.
DNO-Approved 11kV cables - single core, three core and triplex
Eland Cables supplied a range of DNO-approved cables including 6.35/11kV voltages for the UK distribution network operators UKPN, SSE, National Grid Energy Distribution (NGED), Northern Power Grid (NPG), Scottish Power Energy Networks (SPEN) and Electricity Northwest (ENW). These cables are manufactured by G81-approved supplier and conform with the construction requirements of each individual DNO. This includes the 11kV Triplex formation cable for UKPN.
11kV Cable Technical Advice
As Medium Voltage cable specialists, our experts in The Cable Lab can advise on the most appropriate cable for your application and the correlating accessories for the installation environment. Accurate specification aids cable longevity and supports efficient operations. Our DNO MV specialist can also provide assistance for iDNOs and power grid installers and contractors.
Please contact us for more information or support with your project.
11kV Cable
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