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.