15 KV Concentric Cable 90 C (133%-.220″)Full Neutral
Application :
• Predominantly used for primary underground distribution
• Suitable for use in wet or dry locations, direct burial, underground duct, and where exposed to sunlight
• To be used at 35,000 volts or less and at conductor temperatures not to exceed 90°C for normal operation
Standards :
• B 230: Aluminum 1350-H19 Wire for Electrical Purposes
• B 231: Aluminum 1350 Conductors, Concentric-Lay-Stranded
• B 609: Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes
Construction :
• The phase conductor is concentrically stranded, compressed soft copper or 1350-H16/26 aluminum alloy
• Cable is composed of the conductor with moisture block in the strands, covered by a semi-conducting cross-linked polyethylene strand shield, a tree-retardant cross-linked polyethylene primary insulation, and a semi-conducting cross-linked polyethylene insulation shield
• Conductors are available with either 100% or 133% insulation levels
• Concentric neutral of bare copper wires and an insulating polyethylene jacket is applied over the insulation shield
• Cable identified by surface print on the jacket and with the lightning bolt symbol for supply cables indented in the jacket
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Main Usages of Medium Voltage Concentric Cables:
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Power Distribution Networks:
- These cables are commonly used in underground and overhead power distribution systems in urban, suburban, and industrial areas. They provide electricity to neighborhoods, commercial buildings, and industrial facilities from substations to the end-users.
- The concentric construction helps maintain a balanced and effective electrical system, reducing the risk of electrical faults and ensuring a stable power supply.
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Substation to Transformer Connections:
- Medium voltage concentric cables are frequently used to connect substations with transformers. They carry medium-voltage power from the substation and step it down to lower voltage levels for distribution to residential or commercial areas.
- Their use in such connections helps minimize power loss over long distances while ensuring the safety of the electrical system.
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Underground Power Lines:
- One of the most common applications for medium voltage concentric cables is for underground power transmission and distribution. Their design allows for easy installation in underground ducts, especially in areas where overhead power lines are not viable (e.g., densely populated urban environments).
- The concentric design also provides extra shielding against environmental factors like moisture and physical damage.
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Industrial Power Supply:
- In industrial facilities, medium voltage concentric cables are used to power machinery, equipment, and various industrial operations. The reliability and safety of concentric cables make them suitable for mission-critical environments where consistent power is essential.
- Their construction also allows for greater flexibility in terms of installation, especially in areas with complex layouts or tight spaces.
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Renewable Energy Systems:
- Medium voltage concentric cables are increasingly used in renewable energy projects, such as wind farms and solar power plants, for connecting the energy generation equipment (like turbines and inverters) to the grid or local distribution systems.
- These cables help ensure efficient and safe transmission of the generated power to the grid, especially in remote areas where underground cabling is needed.
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Street Lighting and Infrastructure:
- They are also commonly used in street lighting and other infrastructure projects. Medium voltage concentric cables are ideal for supplying power to street lights and other municipal services, ensuring a safe and reliable electrical supply.
Advantages of Medium Voltage Concentric Cables:
- Reliability and Safety: The concentric design provides better fault protection and improves the safety of the cable, as the neutral conductor helps balance electrical currents.
- Reduced Electromagnetic Interference (EMI): The concentric structure shields the cable from external electromagnetic interference, making it ideal for sensitive installations.
- Space Efficiency: The compact and flexible design of concentric cables makes them easier to install in confined spaces, both above and below ground.
- Longer Lifespan: Medium voltage concentric cables have a longer operational life compared to other types of cables due to their robust design, offering better durability against environmental stress.
- Cost-Effective: They are generally more cost-effective than other types of cables when it comes to long-term maintenance and replacement.
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