BS 6622 MV Cable
BS 6622 Single Core Medium Voltage Cable
Application
Power single-core cable voltage range from 3.8/6.6KV to 19/33KV, frequency 50Hz. mainly used in power supply stations, indoor and outdoor laying, pipelines, tunnels, mines, shafts, soil buried and submarine water, atbp., and can withstand considerable pressure and mechanical forces, axial tensile force.
Istraktura
Conductor | Plain annealed copper or aluminum conductors Copper conductors are generally stranded (Part II) and aluminum conductors can be either stranded or solid (Part II). |
Conductor Shield | Extruded semiconducting cross-linked composite layers are applied outside the conductor and completely cover it. The minimum thickness is 0.3 mm and the maximum resistivity shall not exceed 500 ohms at 90°C. Please contact ZMS for details. |
Pagkakabukod | Cross-linked polyethylene compounds |
Outer Sheath | PVC material/Medium Density Polyethylene (MDPE)/LSZH, the outer sheath color is usually black. The usual thickness of the outer sheath is 0.035D+1.0, with D indicating the diameter of the outer sheath in millimeters. |
Physical Properties
Operating temperature: up to 90°C
Temperature range: -5° C (PVC jacket); -20° C (PE jacket)
Short-circuit temperature: 250° C (maximum duration of short-circuit not exceeding 5s)
Bending radius: 12 x OD
Voltage Specification
| 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 |
BS 6622 Three Core Medium Voltage Cable
Application
BS 6622 three-core cables are designed for power distribution from 3.8/6.6KV to 19/33KV at 50Hz.They are mainly used in a variety of applications such as power supply stations, indoor conduits, outdoor, buried and in water, and for the installation of cables to the industry, distribution stations, and power station cables.
Istraktura
Conductor | Plain annealed copper or aluminum conductors Copper conductors are generally stranded (Part II) and aluminum conductors can be either stranded or solid (Part II). |
Conductor Shield | Extruded semiconducting cross-linked composite layers are applied outside the conductor and completely cover it. The minimum thickness is 0.3 mm and the maximum resistivity shall not exceed 500 ohms at 90°C. Please contact ZMS for details. |
Pagkakabukod | Cross-linked polyethylene compounds |
Insulation Shield | PVC material/Medium Density Polyethylene (MDPE)/LSZH, the outer sheath color is usually black. The usual thickness of the outer sheath is 0.035D+1.0, with D indicating the diameter of the outer sheath in millimeters. |
Inner Fill & Packing | The inner layer is generally made of waterproof material, unless the cable is to be longitudinally waterproofed. The inner layer is extruded or overlapped. |
Physical Characteristics
Operating temperature: up to 90°C
Temperature range: -5° C (PVC jacket); -20° C (PE jacket)
Short-circuit temperature: 250° C (maximum duration of short-circuit not exceeding 5s)
Bending radius: 15 x OD
Voltage Specification
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 |
About BS 6622 Medium Voltage Cable
The most commonly used medium voltage cable under the BS6622 standard is the 11kv voltage, as it can be used for power networks, fixed installations in outdoor cable ducts or directly into the ground, and has a wide range of applications, and is indispensable for a variety of power pr ojects and urban electricity use.
In the range of medium voltage cables, the voltage range goes up to about 33kv and may also reach 35kv or 40kv depending on the standards of different countries.
What is the difference between the common 11kv and 33kv for the same medium voltage cable?
Different Voltage Ratings
- 11kV cable: Rated voltage is generally 6/10kV or 6.35/11kV.
- 33kV cables: the rated voltage is generally 19/33kV or 18/30kV.
The higher the voltage level, the higher the requirements for cable insulation, sheath and other materials.
Different Application Acenarios
11kV Cable | – Mostly used for secondary power supply in urban distribution system, such as from the substation to the user distribution cabinet; – Factories, schools, small industrial parks and other medium-sized load places. |
33kV cable | – Used for backbone power transmission lines, e.g. from substations to multiple lower level transformers; – Suitable for long-distance, high-capacity power transmission, such as wind farms, photovoltaic power stations or large industrial load centers. |
Differences in Structural Design
Due to the higher voltages they are subjected to, 33kV cables have a more complex construction, including thicker insulation (e.g. XLPE), tighter shielding systems (conductive shielding, metallic shielding), sheathing and so on, making them more mechanically protective.
11kV cables, on the other hand, have a simpler construction, but still include the basic conductor shielding, insulation and metal shielding.
11kV vs 33kV Cable Size
Due to the high voltage and thick insulation, 33kV cables are larger and heavier overall, requiring higher costs; installation is more complex in terms of space and labor, and often requires specialized tools and higher standards of construction conditions.
Example:
Item | 11kV 1×240mm² | 33kV 1×240mm² |
Conductor Cross Section | 240 mm² | 240 mm² |
Conductor Diameter | ≈ 17.6 mm | ≈ 17.6 mm |
Insulation thickness | 5.5 mm | 8.0 mm |
Cable weight | ≈ 2.2 kg/m | ≈ 2.8 kg/m |
About ZMS Cable
ZMS Cable has more than 30 years of experience in manufacturing medium voltage cables, since 1990, our factory has been in the leading position in medium voltage cable technology, has supplied medium voltage cables for power projects in many countries around the world, and enjoys a good reputation in the Middle East, Southeast Asia, Africa, atbp. ZMS Cable, as an excellent cable supplier, will always implement the principle of “customer first” to carry out the work to ensure that each order can be delivered without fail. ZMS Cable, as an excellent cable supplier, will carry out its work on the principle of “Customer First” to ensure that every order can be delivered without fail.
ZMS Cable Services
Quality Certification
The products manufactured by VERI Cables comply with international standards such as GB, IEC, BS, NFC, ASTM, DIN, atbp. Bukod pa rito, our technical team can provide cable customization services for your needs.
Customer Tracking
VERI provides free professional cable consulting services, one-stop project solution services, and fast product delivery solutions.
Professional Transportation
Mga Cable ng VERI’ initial goal is to ensure fast and safe delivery of products while also providing the best packaging and transportation solutions to reduce customers’ transportation costs greatly.
Cable Packaging
VERI cable packaging is supplied in wooden reels, Mga Kahon ng Corrugated, at mga coil. The ends are sealed with BOPP self-adhesive tape and non-hygroscopic sealing caps to protect the cable ends from moisture. We can print the required logo on the outside of the drums with waterproof material as per the customer’s requirement.