Three Core Medium Voltage Power Cable – 3.6/6.6kV to 19/33kV, XLPE/SWA/PVC – BS 6622 / BS 7835

Industrial Cables Medium Voltage (MV) Cables BS Standard Cables
Description
Specifications

Product Overview

These three-core medium voltage power cables are designed for the distribution of electrical power at nominal voltages from 3.6/6.6 kV to 19/33 kV, 50 Hz. Manufactured in accordance with BS 6622, BS 7835, and IEC 60502-2, they are suitable for a wide range of installations including power supply stations, indoor and outdoor ducts, direct burial, underwater, and cable tray systems in industrial plants, switchboards, and power stations.

Applications

  • Power distribution networks at medium voltage (3.6/6.6 kV to 19/33 kV)

  • Installation in power supply stations

  • Indoor and outdoor cable ducts

  • Direct underground burial

  • Underwater installations

  • Cable trays in industries, switchboards, and power stations

Standards

  • BS 6622

  • BS 7835

  • IEC 60502-2

Specifications at a Glance

Property Detail
Voltage range 3.6/6.6 kV to 19/33 kV
Frequency 50 Hz
Conductor materials Plain annealed copper or aluminium
Insulation XLPE (Cross-Linked Polyethylene)
Metallic screen Copper tape or copper wire
Armour Steel wire armour
Outer sheath PVC or MDPE

Cable Construction

  1. Conductor
    Plain annealed copper or aluminium, complying with IEC 60228 / BS 6360.

  2. Inner layer
    Semi-conductive conductor screen.

  3. Insulation
    XLPE (Cross-Linked Polyethylene).

  4. Outer layer
    Semi-conductive core screen.

  5. Metallic screen
    Copper tape screen or copper wire screen.

  6. Inner sheath
    Polyvinyl Chloride (PVC) bedding material.

  7. Armour
    Steel wire armour.

  8. Outer sheath
    Polyvinyl Chloride (PVC) compound or Medium Density Polyethylene (MDPE).

Technical Data

Rated Voltages:

  • 3.8/6.6kV (Um=7.2kV)

  • 6.35/11kV (Um=12kV)

  • 8.7/15kV (Um=17.5kV)

  • 12.7/22kV (Um=24kV)

  • 19/33kV (Um=36kV)

Voltage and Testing Table

RATED VOLTAGE Uo/U OPERATING VOLTAGE (Um) TESTING VOLTAGE (RMS)
3.8/6.6kV 7.2kV 15kV
6.35/11kV 12kV 25.5kV
8.7/15kV 17.5kV 35kV
12.7/22kV 24kV 51kV
19/33kV 36kV 76kV

Copper Wire Screen Parameters

NOMINAL CROSS-SECTION OF CABLES (mm²) MINIMUM CROSS-SECTION OF COPPER WIRE SCREEN (mm²) DC RESISTANCE OF THE COPPER WIRE SCREEN AT 20°C (Ω)
up to 120 16 1.06
150-300 25 0.72
400-630 35 0.51

General Characteristics

  • Operating Temperature: up to 90°C

  • Temperature Range: -5°C (PVC or LSZH sheath); -20°C (PE sheath)

  • Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)

  • Bending Radius: 15 x OD

THREE CORE 3.8/6.6kV (Um=7.2kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) NOM. THICKNESS OF COPPER TAPE (mm) NOM. BEDDING THICKNESS (mm) NOM. ARMOUR WIRE DIAMETER (mm) NOM. SHEATH THICKNESS (mm) APPROX. OVERALL DIAMETER (mm) APPROX. WEIGHT (CU) (kg/km) APPROX. WEIGHT (AL) (kg/km)
50 2.5 0.1 1.3 2.5 2.5 51.5 5640 4690
70 2.5 0.1 1.3 2.5 2.6 55 6570 5240
95 2.5 0.1 1.4 2.5 2.7 58.9 7760 5890
120 2.5 0.1 1.5 2.5 2.8 62.1 8810 6510
150 2.5 0.1 1.5 2.5 2.9 65.8 10110 7310
185 2.5 0.1 1.6 2.5 3.0 69.5 11520 7960
240 2.6 0.1 1.7 2.5 3.2 75.9 13920 9140
300 2.8 0.1 1.8 3.15 3.5 83.1 17400 11620
400 3.0 0.1 2.0 3.15 3.7 93.0 21900 13980

THREE CORE 6.35/11kV (Um=12kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) NOM. THICKNESS OF COPPER TAPE (mm) NOM. BEDDING THICKNESS (mm) NOM. ARMOUR WIRE DIAMETER (mm) NOM. SHEATH THICKNESS (mm) APPROX. OVERALL DIAMETER (mm) APPROX. WEIGHT (CU) (kg/km) APPROX. WEIGHT (AL) (kg/km)
50 3.4 0.1 1.4 2.5 2.6 55.7 6210 5260
70 3.4 0.1 1.4 2.5 2.7 59.2 7200 5870
95 3.4 0.1 1.5 2.5 2.8 63.2 8420 6550
120 3.4 0.1 1.6 2.5 3.0 67.0 9580 7190
150 3.4 0.1 1.6 2.5 3.1 70.3 10830 8030
185 3.4 0.1 1.7 2.5 3.2 73.9 12290 8720
240 3.4 0.1 1.8 3.15 3.4 81.2 15620 10790
300 3.4 0.1 1.9 3.15 3.6 86.1 18030 12240
400 3.4 0.1 2.0 3.15 3.8 95.0 22350 14350

THREE CORE 8.7/15kV (Um=17.5kV) – Steel Wire Armoured Cables

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) NOM. THICKNESS OF COPPER TAPE (mm) NOM. BEDDING THICKNESS (mm) NOM. ARMOUR WIRE DIAMETER (mm) NOM. SHEATH THICKNESS (mm) APPROX. OVERALL DIAMETER (mm) APPROX. WEIGHT (CU) (kg/km) APPROX. WEIGHT (AL) (kg/km)
50 4.5 0.1 1.5 2.5 2.8 61.1 7010 6060
70 4.5 0.1 1.5 2.5 2.9 64.6 8030 6700
95 4.5 0.1 1.6 2.5 3.0 68.2 9160 7330
120 4.5 0.1 1.7 2.5 3.1 71.7 10340 8030
150 4.5 0.1 1.7 2.5 3.2 75.4 11730 8930
185 4.5 0.1 1.8 3.15 3.4 80.6 14170 10570
240 4.5 0.1 1.9 3.15 3.6 86.6 16670 11810
300 4.5 0.1 2.0 3.15 3.7 91.3 19140 13340
400 4.5 0.1 2.1 3.15 4.0 100.0 23360 15410

THREE CORE 12.7/22kV (Um=24kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) NOM. THICKNESS OF COPPER TAPE (mm) NOM. BEDDING THICKNESS (mm) NOM. ARMOUR WIRE DIAMETER (mm) NOM. SHEATH THICKNESS (mm) APPROX. OVERALL DIAMETER (mm) APPROX. WEIGHT (CU) (kg/km) APPROX. WEIGHT (AL) (kg/km)
50 5.5 0.1 1.5 2.5 2.9 65.6 7710 6810
70 5.5 0.1 1.6 2.5 3.0 69.0 8710 7370
95 5.5 0.1 1.7 2.5 3.2 73.1 10000 8130
120 5.5 0.1 1.7 3.15 3.3 77.7 12040 9730
150 5.5 0.1 1.8 3.15 3.4 81.7 13550 10750
185 5.5 0.1 1.9 3.15 3.6 85.5 15150 11610
240 5.5 0.1 2.0 3.15 3.7 91.3 17710 12840
300 5.5 0.1 2.0 3.15 3.9 96.0 20170 14360
400 5.5 0.1 2.2 3.15 4.1 104.8 24520 16480

THREE CORE 19/33kV (Um=36kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) NOM. THICKNESS OF COPPER TAPE (mm) NOM. BEDDING THICKNESS (mm) NOM. ARMOUR WIRE DIAMETER (mm) NOM. SHEATH THICKNESS (mm) APPROX. OVERALL DIAMETER (mm) APPROX. WEIGHT (CU) (kg/km) APPROX. WEIGHT (AL) (kg/km)
50 8.0 0.1 1.8 3.15 3.4 79.0 10620 9680
70 8.0 0.1 1.8 3.15 3.5 82.5 11840 10440
95 8.0 0.1 1.9 3.15 3.6 86.4 13200 11350
120 8.0 0.1 2.0 3.15 3.7 89.9 14520 12190
150 8.0 0.1 2.0 3.15 3.8 93.6 16070 13280
185 8.0 0.1 2.1 3.15 3.9 97.3 17710 14090
240 8.0 0.1 2.2 3.15 4.1 103.2 20370 15460
300 8.0 0.1 2.3 3.15 4.3 108.2 22980 17210
400 8.0 0.1 2.4 3.15 4.5 116.8 27480 19450