BS 6622 XLPE MDPE 6.35/11 (12)kV Cable
Unveiling BS 6622 XLPE MDPE 6.35/11 (12)kV Medium-voltage Power Cable
BS 6622 XLPE MDPE 6.35/11 (12)kV Cable
Category | Details |
|---|---|
Application | Power cables for power networks, underground, and in cable ducting. Suitable for direct burial. |
Voltage Rating | Uo/U (Um): 6.35/11 (12)kV |
Temperature Rating | Fixed: 0°C to +90°C |
Temperature Index | 0°C to +90°C |
Minimum Bending Radius | 12 x overall diameter (10 x overall diameter near joints/terminations with controlled bending using a former) |
Conductor | Class 2 stranded copper conductor |
Conductor Screen | Semi-conductive XLPE (Cross-Linked Polyethylene) |
Insulation | XLPE (Cross-Linked Polyethylene) |
Insulation Screen | Semi-conductive XLPE (Cross-Linked Polyethylene) |
Separator | Water blocking tape |
Metallic Screen | Individual copper wire screen |
Filler | PET (Polyethylene Terephthalate) fibres |
Binding Tape | Separator |
Bedding | PVC (Polyvinyl Chloride) |
Armour | SWA (Steel Wire Armoured) |
Sheath | MDPE (Medium Density Polyethylene) |
Sheath Colour | Red, Black |
Standards | BS 6622, IEC 60502-2, IEC/EN 60228 |
DIMENSIONS
ELAND PART NO. | SHEATH COLOUR | PADS NO. | NO. OF CORES | NOMINAL CROSS SECTIONAL AREA (mm²) | NOMINAL DIAMETER (mm) | NOMINAL WEIGHT (kg/km) |
|---|---|---|---|---|---|---|
Under Armour | Over Armour | |||||
A9M11KV03185-BK | Black | 006/120036 | 3 | 185 | 64.4 | 69.4 |
A9M11KV03185-RD | Red | 006/120037 | 3 | 185 | 64.4 | 69.4 |
CONDUCTORS
Class 2 Stranded Conductors for Single Core and Multi-Core Cables
NOMINAL CROSS SECTIONAL AREA (mm²) | MINIMUM NO. OF WIRES IN CONDUCTOR | MAXIMUM RESISTANCE OF CONDUCTOR AT 20ºC (ohms/km) |
|---|---|---|
Circular | Circular Compacted | |
Cu | Al | |
185 | 37 | 37 |
Electrical Characteristics
Copper Conductor Dimensions and Current Carrying Capacity
NO. OF CORES | NOMINAL CROSS SECTIONAL AREA (mm²) | CONTINUOUS CURRENT RATING (Amps) |
|---|---|---|
In Ground | ||
Trefoil | ||
3 | 185 | 430 |
DE-RATING FACTORS
Air Temperature
AIR TEMPERATURE (°C) | 25 | 30 | 35 | 40 | 45 | 50 | 55 |
|---|---|---|---|---|---|---|---|
DE-RATING FACTOR | 1.00 | 0.96 | 0.92 | 0.88 | 0.83 | 0.78 | 0.73 |
Ground Temperature
GROUND TEMPERATURE (°C) | 10 | 15 | 20 | 25 | 30 | 35 | 40 |
|---|---|---|---|---|---|---|---|
DE-RATING FACTOR | 1.03 | 1.00 | 0.97 | 0.93 | 0.89 | 0.86 | 0.82 |
Ground Thermal Resistivity
GROUND THERMAL RESISTIVITY (km/W) | 0.9 | 1.0 | 1.2 | 1.5 | 2.0 | 2.5 | 3.0 |
|---|---|---|---|---|---|---|---|
DE-RATING FACTOR | 1.06 | 1.04 | 1.00 | 0.92 | 0.82 | 0.74 | 0.68 |
Depth of Laying
DEPTH OF LAYING (m) | 0.80 | 1.00 | 1.25 | 1.50 | 1.75 | 2.00 | 2.50 |
|---|---|---|---|---|---|---|---|
DE-RATING FACTOR | 1.00 | 0.97 | 0.95 | 0.94 | 0.93 | 0.91 | 0.90 |
What is the BS 6622 XLPE MDPE 6.35/11 (12)kV Armored Cable?
At its core, the BS 6622 XLPE MDPE 6.35/11 (12)kV Armored Cable is a medium-voltage power cable engineered for transmitting electricity at voltages up to 12 kV. The nomenclature breaks down as follows: "6.35/11 (12)kV" indicates the voltage rating, where Uo/U (Um) represents the phase-to-ground voltage (6.35 kV), phase-to-phase voltage (11 kV), and maximum system voltage (12 kV). This makes it ideal for distribution networks where power needs to be stepped down from high-voltage transmission lines to end-users.
The "XLPE" stands for cross-linked polyethylene, a thermoset material that provides excellent electrical insulation, resisting heat and moisture far better than traditional alternatives like PVC. "MDPE" refers to medium-density polyethylene, used for the outer sheath, offering toughness against abrasion and environmental stressors. The "armored" aspect involves steel wire armor (SWA), which protects the cable from mechanical damage, rodents, and even deliberate sabotage—a growing concern in regions prone to theft.
This cable adheres to standards like BS 6622, IEC 60502-2, and IEC/EN 60228, ensuring it meets rigorous international benchmarks for safety and performance. It's typically available in three-core configurations, with nominal cross-sectional areas such as 185 mm², making it suitable for high-current applications. In essence, this armored cable is a lifeline for power utilities, enabling the safe burial of lines underground or in ducts, away from the vulnerabilities of overhead systems.
Usage Scenarios: Where It Shines
The BS 6622 XLPE MDPE 6.35/11 (12)kV Armored Cable excels in power networks, underground installations, and ducting, including direct burial. It's perfect for urban areas where overhead lines are impractical, reducing visual clutter and vulnerability to storms.
In industrial settings, it powers factories and mines; in renewables, it connects solar farms to grids. Its armored design suits harsh terrains, like South Africa's mining regions, resisting damage from excavation or wildlife.
The BS 6622 XLPE MDPE 6.35/11 (12)kV Armored Cable stands as a cornerstone of modern power distribution, blending innovation with practicality. In South Africa, it tackles pressing issues like theft and grid expansion, paving the way for a resilient energy future.
