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BS6622 Three cores XLPE Insulation medium voltage electrical cable up to 36kv
Compliances
Application
British Standard three-core medium-voltage cables are a common feature of power transmission and distribution systems, facilitating the transfer of medium-voltage electrical energy. Such cables are suitable for use in the distribution of electrical power in industrial, commercial and residential areas, as well as for the transmission of power in distributed generation systems. Specific application scenarios include, but are not limited to, the following:
In industrial contexts, these cables are utilised for the transmission of power in factories, mines, manufacturing facilities and other industrial environments.
In the context of building use, the cables are employed for the purpose of power distribution in both commercial and residential areas.
A distributed power generation system is a system that facilitates the transmission of power from distributed energy sources, such as solar and wind power generation.
British standard three-core medium voltage cables may also be employed in certain exceptional circumstances, such as power transmission in subterranean environments including underground tunnels, subways, underground power facilities and other subterranean settings.
These represent merely a few of the more common application scenarios. In point of fact, the British standard three-core medium voltage cable may be utilised in a multitude of contexts requiring medium voltage power transmission. Should you have particular application scenarios or other related queries, you are encouraged to continue asking.
Standards
BS 6622
BS6360
BS7655
BS 7835 (LSZH)
Structure
| 1 | Conductor | Aluminum or Copper |
| According to BS6360 | ||
| 2 | Conductor Screen | semi-conducting cross-linkable |
| 3 | Insulation | XLPE cross-linked polyethylene |
| natural color | ||
| 4 | Insulaton Screen | semi-conducting cross-linkable |
| 5 | Separation Sheath | Black PVC or LSZH |
| 6 | Armour | Galvanized steel wire |
| 7 | Over Sheath | Blue PVC or as request |
| Cross | Insulation Thickness | ||||
| Section Area | 3.8/6.6KV | 6.35/11KV | 8.7/15KV | 12.7/22KV | 19/33KV |
| (Um=7.2KV) | (Um=12KV) | (Um=17.5KV) | (Um=24KV) | (Um=36KV) | |
| mm² | mm | mm | mm | mm | mm |
| 70 – 185 | 2.5 | 3.4 | 4.5 | 5.5 | 8 |
| 240 | 2.6 | 3.4 | 4.5 | 5.5 | 8 |
| 300 | 2.8 | 3.4 | 4.5 | 5.5 | 8 |
| 400 | 3 | 3.4 | 4.5 | 5.5 | 8 |
| Above 500 | 3.2 | 3.4 | 4.5 | 5.5 | 8 |
Armour Wire Diameter
| Fictitious Diameter Under the Armour | Armour Wire Diameter | |
| mm | mm | |
| > | < | |
| - | 25 | 1.6 |
| 25 | 35 | 2 |
| 35 | 60 | 2.5 |
| 60 | - | 3.15 |
Physical Properties
Operating Temperature: up to 90°C
Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 15 x OD
Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 15 x OD
Nominal /Operating /Test Voltages
| Rated Voltage Uo/U | Operating Voltage (Um) | Testing Voltage (rms) |
| 3.8/6.60KV | 7.20KV | 15KV |
| 6.35/11.0KV | 12KV | 25.50KV |
| 8.7/15.0KV | 17.5KV | 35.0KV |
| 12.7/22.0KV | 24KV | 51.0KV |
| 19/33.0KV | 36KV | 76.0KV |
Three Core 3.8/6.6KV (Um=7.2KV) Dimensional Data
| Nom. | Nom. Insulation Thickness | Copper Wire Screen Area | Copper Tape Screen Area | Nom.Bedding Thickness | Nom. Armour Wire Diameter | Nom.Sheath Thickness | Approx. Overall Diameter | Approx. Weight | |
| Cross- Section Area | CU | AL | |||||||
| mm² | mm | mm² | mm² | mm | mm | mm | mm | kg/km | |
| 70 | 2.5 | 16 | 6.5 | 1.3 | 2.5 | 2.6 | 55 | 6573 | 5242 |
| 95 | 2.5 | 16 | 7.4 | 1.4 | 2.5 | 2.7 | 58.9 | 7763 | 5892 |
| 120 | 2.5 | 16 | 8.1 | 1.5 | 2.5 | 2.8 | 62.1 | 8813 | 6512 |
| 150 | 2.5 | 25 | 8.6 | 1.5 | 2.5 | 2.9 | 65.8 | 10113 | 7312 |
| 185 | 2.5 | 25 | 9.5 | 1.6 | 2.5 | 3 | 69.5 | 11523 | 7962 |
| 240 | 2.6 | 25 | 10.5 | 1.7 | 2.5 | 3.2 | 75.9 | 13923 | 9142 |
| 300 | 2.8 | 25 | 11.5 | 1.8 | 3.15 | 3.5 | 83.1 | 17403 | 11622 |
| 400 | 3 | 35 | 12.5 | 2 | 3.15 | 3.7 | 93 | 21903 | 13982 |
Three Core 8.7/15KV (Um=17.5KV) Dimensional Data
| Nom. | Nom. Insulation Thickness | Copper | Copper | Nom. Bedding Thickness | Nom. Armour Wire Diameter | Nom. Sheath Thickness | Approx. Overall Diameter | Approx. Weight | |
| Cross- Section Area | Wire Screen Area | Tape Screen Area | CU | AL | |||||
| mm² | mm | mm² | mm² | mm | mm | mm | mm | kg/km | |
| 70 | 4.5 | 16 | 8.01 | 1.5 | 2.5 | 2.9 | 64.5 | 8034 | 6701 |
| 95 | 4.5 | 16 | 8.72 | 1.6 | 2.5 | 3 | 68.3 | 9164 | 7331 |
| 120 | 4.5 | 16 | 9.44 | 1.7 | 2.5 | 3.1 | 71.6 | 10344 | 8031 |
| 150 | 4.5 | 25 | 9.98 | 1.7 | 2.5 | 3.2 | 75.5 | 11734 | 8931 |
| 185 | 4.5 | 25 | 10.83 | 1.8 | 3.15 | 3.4 | 80.5 | 14174 | 10571 |
| 240 | 4.5 | 25 | 11.75 | 1.9 | 3.15 | 3.6 | 86.7 | 16674 | 11811 |
| 300 | 4.5 | 25 | 12.65 | 2 | 3.15 | 3.7 | 91.4 | 19144 | 13341 |
| 400 | 4.5 | 35 | 13.72 | 2.1 | 3.15 | 4 | 101 | 23364 | 15411 |
How to function of protect galvanized steel wire in medium voltage cable
The steel wire armouring of medium-voltage cables in international standards serves the following principal functions:
The primary function of the steel wire armouring of medium-voltage cables in international standards is to provide mechanical protection. The steel wire armour provides mechanical protection for cables, offering resistance to external extrusion, stretching and physical damage, thereby safeguarding the insulation and conductors located within the cable.
The tensile performance of the steel wire armour is as follows: The steel wire armour can serve to enhance the tensile performance of the cable, thus enabling it to withstand a certain tensile force. Such a solution is appropriate for situations where the cable is to be buried or must traverse a complex environment.
The protective performance of steel wire armour is as follows: The application of steel wire armour can facilitate the provision of an additional layer of protection, thereby preventing the ingress of external chemical substances and moisture, and thus extending the service life of the cable.
In general, steel wire armour is employed for the purposes of mechanical protection, tensile performance and protective performance in medium-voltage cables.