XWA 275kV Cable | EHV Cable
Delivering Power Across Regions with Maximum Stability
음식 275kV cable is developed for extra high voltage (EHV) transmission networks, where electricity must be delivered across long distances with minimal instability and maximum efficiency. Rated at 160/275 kV (Um 300 kV), it is typically deployed in high-capacity corridors connecting major substations, generation hubs, and regional grids. XWA delivers a fully optimized cable solution engineered for high-load transmission, combining advanced insulation design, precise manufacturing control, and project-specific customization.
275kV Cable Specifications & 건설
- 지휘자: Aluminium or copper conductors from 630 mm² to 2500 mm², designed for stable current flow under ultra-high load conditions.
- 격리: XLPE insulation system engineered to withstand very high electrical stress levels and maintain long-term dielectric performance.
- Metallic Sheath Options: Lead sheath, aluminium sheath, or copper wire screen, selected based on grounding method, moisture protection, and fault current requirements.
- Outer Jacket: PE outer sheath providing durability against soil pressure, 수분, and environmental impact.
- 전압 정격: Uo/U 160/275 kV, Um 300 kV.
- Operating Capacitance: Ranging from 0.14 µF/km to 0.27 µF/km depending on conductor size.
- Charging Current: Ranging from 7.1 A/km to 13.6 A/km.
XWA 275kV Cable Datasheet
| Conductor Type | Cross-Section (mm²) | Outer Diameter (mm) | Net Weight with Pb Sheath (kg/m) |
|---|---|---|---|
| 알류미늄 | 630 | 107 | 18.9 |
| 구리 | 630 | 103 | 23.1 |
| 알류미늄 | 1000 | 108 | 21.3 |
| 구리 | 1000 | 111 | 27.9 |
| 알류미늄 | 1600 | 123 | 25.7 |
| 구리 | 1600 | 127 | 36.6 |
| 알류미늄 | 2500 | 130 | 31.5 |
| 구리 | 2500 | 134 | 48.0 |
Why Choose XWA 275kV Cable for Critical Grid Projects?
275kV systems are used where power demand is high and interruption is not acceptable. 음식 Power & 케이블 제조업체 focuses on delivering cables that perform reliably under these conditions.
- Stable Operation Under High Electrical Stress
Insulation and shielding are designed to handle continuous high voltage without degradation over time. - Efficient Long-Distance Transmission
Reduced current for the same power level lowers transmission losses and improves system efficiency. - Designed for High Fault Levels
Cable structure supports high short-circuit currents typical in large interconnected grids. - Adapted to Complex Routing Conditions
Suitable for tunnel, duct, and underground installations requiring careful thermal and mechanical design. - Controlled Manufacturing Process
From conductor stranding to insulation extrusion, each stage is monitored to ensure consistent product quality. - Direct Supply from Manufacturer
Factory-direct model helps optimize project costs while maintaining performance standards.
Where 275kV Cable Is Typically Used
275kV cables are deployed in extra high voltage transmission systems where large-scale power transfer, long distances, and grid stability are critical. This voltage level is widely used in mature transmission networks and major infrastructure projects around the world.
- Interconnection Between Major Substations
275kV cables are commonly used to link primary grid substations across regions, forming high-capacity transmission corridors. In many countries like the UK and Australia, 275kV is a standard voltage level for backbone networks, enabling efficient bulk power transfer while maintaining grid stability. - Power Plant Evacuation (Thermal, Nuclear, Hydro)
Large power stations often export electricity through 275kV systems. This voltage level allows high continuous load transmission from generation sites to major grid nodes with reduced losses. - Underground EHV Transmission in Urban Areas
In densely populated cities, 275kV underground cables are used to replace overhead lines where space is limited or environmental restrictions apply. These installations typically involve tunnel or duct systems, combined with advanced thermal management and cable bonding designs. - Offshore Wind and Renewable Energy Integration
275kV cables are frequently selected for offshore wind farm export cables. These systems often integrate fiber optic monitoring (DTS) and moisture-resistant sheath designs for harsh environments. - Grid Reinforcement and Capacity Upgrades
In developed grids, 275kV cables are used to increase transmission capacity without expanding overhead corridors. Utilities deploy them alongside existing infrastructure, using cross-bonding systems and surge protection to ensure safe and efficient operation under higher load conditions.
설치 & 지원하다
- Bending Radius: 일반적으로 ≥ 2.7 m 케이블 크기에 따라.
- Handling: Requires controlled installation due to cable weight and diameter.
- Thermal Design: Soil conditions and spacing must be considered for heat dissipation.
- System Components: Installed with joints, terminations, and bonding systems for full operation.
Our team of technical experts is available to answer your questions, 맞춤형 솔루션 제공, 귀하의 프로젝트를 기획부터 설치까지 지원해 드립니다..
FAQs of XWA 275 kV EHV Cable
In what types of projects is 275kV cable the preferred solution?
에이: 275kV cables are typically selected for long-distance bulk power transmission, interconnection between major substations, and large power plant export systems. They are especially suitable where high load capacity and grid stability are critical.
When should 275kV be chosen instead of 220kV?
에이: 275kV is preferred when projects require higher transmission capacity, longer route distances, or reduced transmission losses. It is commonly used in heavily loaded corridors or national grid backbone networks where 220kV may not provide sufficient capacity.
Is 275kV cable suitable for underground or tunnel installation?
에이: 예, but it requires advanced thermal design, proper spacing, and engineered installation methods due to its larger size and higher heat generation. It is widely used in urban EHV tunnels and duct systems where overhead lines are not feasible.
What accessories are required for a complete 275kV cable system?
에이: A full system includes EHV-grade joints, outdoor/indoor terminations, cross-bonding systems, sheath voltage limiters (SVL), and surge protection devices. These components are critical to ensure safe operation and control electrical stress along the cable route.
How is thermal performance managed in 275kV cable installations?
에이: Thermal performance is controlled through soil thermal resistivity design, cable spacing, backfill materials, and sometimes forced cooling systems. Proper thermal management is essential to maintain current-carrying capacity and avoid overheating.
How does your factory maintain competitive pricing on EHV cables?
에이: Because we are the direct manufacturer with over 15 years of optimized production experience, we eliminate third-party and middleman markups. This direct-to-buyer model allows us to offer highly competitive, cost-effective pricing for national-level infrastructure bids while strictly adhering to IEC performance and safety standards.
What is the expected service life of a 275kV cable system?
에이: With proper design, installation, and operation, XLPE 275kV cable systems typically achieve a service life of 30–40 years or more, even under continuous high electrical stress.
Can XWA support complete EHV cable system projects?
에이: 예. Beyond supplying the cable, XWA supports system design, accessory matching, and technical guidance, ensuring compatibility and performance across the entire 275kV transmission system.
What other voltage levels can XWA provide?
에이: XWA manufactures a full range of high and extra high voltage cables from 66kV HV cables 에게 500kV HV cables, suitable for large-scale transmission and national grid infrastructure projects.