BS 6622 XLPE PVC 6.35/11 (12)kV Cable
BS 6622 CU XLPE AWA/SWA PVC 6.35/11 (12)kV Cable
BS 6622 CU XLPE AWA/SWA PVC 6.35/11 (12)kV Cable
Application
Power cables for power networks, underground, and in cable ducting.
Characteristics
Property | Value |
|---|---|
Voltage Rating Uo/U (Um) | 6.35/11 (12)kV |
Temperature Rating | |
Maximum conductor operating temperature | 90°C |
Initial temperature at S.C.C for metallic screen | 80°C |
Maximum conductor temperature during S.C | 250°C |
Minimum Bending Radius | |
Single core | 15 x overall diameter |
Multi core | 12 x overall diameter |
Construction
Component | Description |
|---|---|
Conductor | Class 2 Stranded Circular Compacted Copper |
Conductor Screen | Extruded Inner Semi Conductor (Bonded Type) |
Insulation | XLPE (Cross-Linked Polyethylene) |
Outer Semi Conductor | Extruded Outer Semi Conductor (Strippable Type) |
Metallic Screen | Copper tape with 10% overlap |
Inner Sheath | PVC (Polyvinyl Chloride) |
Armour | Single core: AWA (Aluminium Wire Armoured) |
Outer Sheath | PVC (Polyvinyl Chloride) |
Standards
BS 6622
IEC 60502-2
IEC/EN 60228
Flame Retardant according to IEC/EN 60332-1-2
Dimensions
Part No. | No. of Cores | Nominal Cross Sectional Area (mm²) | Nominal Insulation Thickness (mm) | Nominal Sheath Thickness (mm) | Nominal Overall Diameter (mm) | Nominal Weight (kg/km) | Sheath Colour |
|---|---|---|---|---|---|---|---|
A9M11KV01070* | 1 | 70 | 3.4 | 1.9 | 28.9 | 1424 | Red (RD), Black (BK) |
A9M11KV01095* | 1 | 95 | 3.4 | 1.9 | 30.2 | 1707 | Red (RD), Black (BK) |
A9M11KV01120* | 1 | 120 | 3.4 | 2.0 | 32.3 | 2046 | Red (RD), Black (BK) |
A9M11KV01150* | 1 | 150 | 3.4 | 2.1 | 33.9 | 2363 | Red (RD), Black (BK) |
A9M11KV01185* | 1 | 185 | 3.4 | 2.1 | 35.4 | 2735 | Red (RD), Black (BK) |
A9M11KV01240* | 1 | 240 | 3.4 | 2.2 | 38.0 | 3376 | Red (RD), Black (BK) |
A9M11KV01300* | 1 | 300 | 3.4 | 2.3 | 40.6 | 4012 | Red (RD), Black (BK) |
A9M11KV01400* | 1 | 400 | 3.4 | 2.4 | 44.6 | 5042 | Red (RD), Black (BK) |
A9M11KV01500* | 1 | 500 | 3.4 | 2.5 | 48.2 | 6154 | Red (RD), Black (BK) |
A9M11KV01630* | 1 | 630 | 3.4 | 2.6 | 53.3 | 7718 | Red (RD), Black (BK) |
A9M11KV01800* | 1 | 800 | 3.4 | 2.8 | 57.6 | 9616 | Red (RD), Black (BK) |
A9M11KV03070* | 3 | 70 | 3.4 | 2.7 | 54.6 | 5760 | Red (RD), Black (BK) |
A9M11KV03095* | 3 | 95 | 3.4 | 2.8 | 57.6 | 6732 | Red (RD), Black (BK) |
A9M11KV03120* | 3 | 120 | 3.4 | 3.0 | 61.0 | 7789 | Red (RD), Black (BK) |
A9M11KV03150* | 3 | 150 | 3.4 | 3.1 | 64.6 | 8916 | Red (RD), Black (BK) |
A9M11KV03185* | 3 | 185 | 3.4 | 3.2 | 68.3 | 10290 | Red (RD), Black (BK) |
A9M11KV03240* | 3 | 240 | 3.4 | 3.4 | 75.7 | 13367 | Red (RD), Black (BK) |
A9M11KV03300* | 3 | 300 | 3.4 | 3.4 | 81.5 | 15736 | Red (RD), Black (BK) |
A9M11KV03400* | 3 | 400 | 3.4 | 3.8 | 87.7 | 18907 | Red (RD), Black (BK) |
Note: Replace * in Part No. with colour code (e.g., A9M11KV01070RD = 70mm² Red).
Voltage and Temperature Ratings
The BS 6622 cable is rated for a voltage of 6.35/11 (12)kV, making it ideal for medium voltage applications in power distribution networks. Its conductor can operate at a maximum temperature of 90°C, with a short-circuit temperature tolerance of up to 250°C, ensuring durability under high-stress conditions. During a short-circuit, the metallic screen maintains stability at an initial temperature of 80°C, safeguarding the cable’s integrity.
Construction Details
The cable’s robust construction is tailored for reliability:
Conductor: Made of Class 2 stranded circular compacted copper, offering excellent conductivity and flexibility.
Conductor Screen: An extruded inner semi-conductor (bonded type) ensures uniform electric field distribution.
Insulation: Cross-Linked Polyethylene (XLPE) provides superior thermal and electrical properties, resisting degradation over time.
Outer Semi-Conductor: A strippable extruded layer facilitates easy jointing and termination.
Metallic Screen: Features copper tape with a 10% overlap for effective fault current handling.
Inner Sheath: Polyvinyl Chloride (PVC) offers mechanical protection and moisture resistance.
Armour: Single-core cables use Aluminium Wire Armour (AWA), while multi-core cables employ Galvanised Steel Wire Armour (SWA), enhancing mechanical strength.
Outer Sheath: A durable PVC layer, available in red or black, protects against environmental factors.
Bending Radius
The cable’s flexibility is defined by its minimum bending radius: 15 x overall diameter for single-core cables and 12 x overall diameter for multi-core cables, ensuring ease of installation in confined spaces like ducts or trenches.
Standards Compliance
The BS 6622 cable adheres to international standards, including BS 6622, IEC 60502-2, IEC/EN 60228, and is flame-retardant per IEC/EN 60332-1-2, making it a trusted choice for safety-critical applications.
Dimensions and Variants
The cable is available in single-core and three-core configurations, with nominal cross-sectional areas ranging from 70 mm² to 800 mm² for single-core and 70 mm² to 400 mm² for three-core cables. Insulation thickness remains consistent at 3.4 mm, while sheath thickness varies slightly depending on the cable size. Nominal weights range from 1424 kg/km for a single-core 70 mm² cable to 18907 kg/km for a three-core 400 mm² cable, reflecting the robust materials used.
Applications in South African Power Networks
The BS 6622 cable is a workhorse in South Africa’s power infrastructure, used in:
Urban Power Grids: Supplying electricity to residential and commercial areas in cities like Cape Town and Durban, where underground cabling reduces visual clutter and enhances reliability.
Industrial Facilities: Powering heavy machinery in mining and manufacturing sectors, particularly in Gauteng and Mpumalanga.
Renewable Energy Projects: Connecting solar and wind farms to the national grid, supporting South Africa’s push for sustainable energy.
Rural Electrification: Delivering power to remote communities, addressing energy access challenges in provinces like the Eastern Cape.
Its ability to withstand harsh conditions, including moisture, mechanical stress, and temperature fluctuations, makes it ideal for South Africa’s varied climates and terrains.
Frequently Asked Questions (FAQs)
1. What makes the BS 6622 cable suitable for South African conditions?
The cable’s XLPE insulation withstands high temperatures and moisture, while its AWA/SWA armour protects against mechanical damage, making it ideal for South Africa’s diverse environments.
2. What is the difference between AWA and SWA armour?
AWA (Aluminium Wire Armour) is used in single-core cables to prevent eddy currents, while SWA (Steel Wire Armour) is used in multi-core cables for enhanced mechanical strength.
3. How does the cable’s flame-retardant property benefit installations?
The cable meets IEC/EN 60332-1-2 standards, reducing fire risks in urban and rural settings, especially in fire-prone regions like the Western Cape.
The BS 6622 CU XLPE AWA/SWA PVC 6.35/11 (12)kV cable is a vital component in South Africa’s quest for reliable and sustainable power distribution. Its advanced construction, adherence to international standards, and versatility make it a top choice for urban grids, industrial applications, and renewable energy projects. As South Africa navigates its energy challenges, from load shedding to rural electrification, this cable plays a pivotal role in building a resilient power infrastructure.
