Single Core Medium Voltage Cable to BS 6622 / BS 7835 | 3.8/6.6kV to 19/33kV

BS Standard Cables
Description

Product Overview

These single core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 3.8/6.6kV to 19/33kV at 50Hz. They are suitable for installation in:

  • Power supply stations

  • Indoor and cable duct systems

  • Outdoor, underground and underwater environments

  • Cable trays in industrial plants, switchboards and power stations

Standards: BS 6622 / BS 7835, IEC 60502-2

Specifications

Feature Description
Voltage Rating Medium Voltage (3.8/6.6kV to 19/33kV)
Frequency 50Hz
Conductor Plain annealed copper or aluminium (IEC 60228 / BS 6360)
Inner Layer Semi-conductive conductor screen
Insulation XLPE (Cross-Linked Polyethylene)
Outer Layer Semi-conductive core screen
Metallic Screen Copper tape screen or copper wire screen
Inner Sheath PVC bedding material
Armour Aluminium wire armour
Outer Sheath PVC compound or MDPE (medium density polyethylene)

Construction

  1. Conductor – Plain annealed copper or aluminium

  2. Conductor screen – Semi-conductive layer

  3. Insulation – XLPE

  4. Core screen – Semi-conductive layer

  5. Metallic screen – Copper tape or copper wire

  6. Inner sheath – PVC bedding

  7. Armour – Aluminium wire

  8. Outer sheath – PVC or MDPE

Technical Parameters

Rated Voltages & Testing

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 Data

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 × OD

Dimensional Data – Single Core Cables

3.8/6.6kV (Um=7.2kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) NOM. COPPER TAPE THICKNESS (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 0.12 1.2 1.6 1.0 28.4 1500 1190
70 2.5 0.12 1.2 1.6 1.8 30.0 1740 1300
95 2.5 0.12 1.2 1.6 1.9 31.8 2030 1430
120 2.5 0.12 1.2 1.6 1.9 33.2 2310 1550
150 2.5 0.12 1.2 1.6 2.0 35.1 2660 1720
185 2.5 0.12 1.2 2.0 2.0 37.4 3120 1950
240 2.6 0.12 1.2 2.0 2.1 40.3 3740 2200
300 2.8 0.12 1.2 2.0 2.2 42.9 4400 2520
400 3.0 0.12 1.2 2.0 2.3 47.2 5490 2960
500 3.2 0.12 1.3 2.5 2.5 51.6 6760 3660
630 3.2 0.12 1.4 2.5 2.6 57.0 8200 4160

6.35/11kV (Um=12kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) NOM. COPPER TAPE THICKNESS (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 0.12 1.2 1.6 1.8 30.2 1600 1280
70 3.4 0.12 1.2 1.6 1.9 32.0 1840 1400
95 3.4 0.12 1.2 1.6 1.9 33.6 2130 1530
120 3.4 0.12 1.2 1.6 2.0 35.2 2430 1670
150 3.4 0.12 1.2 1.6 2.1 37.9 2870 1930
185 3.4 0.12 1.2 2.0 2.1 39.4 3240 2080
240 3.4 0.12 1.2 2.0 2.2 42.1 3490 2330
300 3.4 0.12 1.2 2.0 2.2 44.1 4490 2560
400 3.4 0.12 1.2 2.0 2.4 48.2 5589 3040
500 3.4 0.12 1.3 2.5 2.5 52.0 6780 3680
630 3.4 0.12 1.4 2.5 2.6 57.4 8230 4200

8.7/15kV (Um=17.5kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) COPPER TAPE SCREEN AREA (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 0.12 1.2 1.6 1.9 32.6 1730 1410
70 4.5 0.12 1.2 1.6 1.9 34.2 1970 1520
95 4.5 0.12 1.2 2.0 2.0 36.8 2370 1770
120 4.5 0.12 1.2 2.0 2.1 38.4 2670 1910
150 4.5 0.12 1.2 2.0 2.1 40.1 3020 2080
185 4.5 0.12 1.2 2.0 2.2 41.8 3420 2240
240 4.5 0.12 1.2 2.0 2.3 44.5 4050 2500
300 4.5 0.12 1.2 2.0 2.3 46.5 4680 2780
400 4.5 0.12 1.3 2.5 2.5 51.8 5970 3430
500 4.5 0.12 1.3 2.5 2.6 54.4 7010 3910
630 4.5 0.12 1.4 2.5 2.7 59.8 8480 4420

12.7/22kV (Um=24kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) COPPER TAPE SCREEN AREA (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 0.12 1.2 1.6 2.0 34.8 1850 1540
70 5.5 0.12 1.2 2.0 2.0 37.2 2190 1750
95 5.5 0.12 1.2 2.0 2.1 39.0 2510 1900
120 5.5 0.12 1.2 2.0 2.1 40.4 2810 2040
150 5.5 0.12 1.2 2.0 2.2 42.3 3180 2240
185 5.5 0.12 1.2 2.0 2.2 43.8 3560 2380
240 5.5 0.12 1.2 2.0 2.3 46.5 4200 2640
300 5.5 0.12 1.3 2.5 2.4 49.9 5030 3130
400 5.5 0.12 1.3 2.5 2.5 53.8 6140 3600
500 5.5 0.12 1.4 2.5 2.6 56.6 7210 4100
630 5.5 0.12 1.4 2.5 2.8 62.0 8700 4650

19/33kV (Um=36kV)

NOM. CROSS-SECTION AREA (mm²) NOM. INSULATION THICKNESS (mm) COPPER TAPE SCREEN AREA (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 0.12 1.2 2.0 2.2 41.0 2300 1980
70 8.0 0.12 1.2 2.0 2.2 42.6 2560 2120
95 8.0 0.12 1.2 2.0 2.3 44.4 2890 2290
120 8.0 0.12 1.2 2.0 2.3 45.8 3200 2430
150 8.0 0.12 1.3 2.5 2.4 48.9 3760 2830
185 8.0 0.12 1.3 2.5 2.5 50.6 4180 3010
240 8.0 0.12 1.3 2.5 2.5 53.1 4830 3270
300 8.0 0.12 1.4 2.5 2.6 55.5 5540 3630
400 8.0 0.12 1.4 2.5 2.7 59.4 6680 4130
500 8.0 0.12 1.5 2.5 2.8 62.2 7790 4690
630 8.0 0.12 1.5 2.5 2.9 67.4 9290 5220