20kV Single Core SWA Armoured Cable IEC Standard for Industrial and Underground Power Transmission
20kV Single Core SWA Armoured Cable IEC Standard for Industrial and Underground Power Transmission
20kV Single Core SWA Armoured Cable is a medium voltage XLPE insulated power cable designed for reliable electrical transmission in utility networks, substations, renewable energy projects, industrial facilities, and underground distribution systems. The cable combines excellent electrical performance with strong mechanical protection, making it suitable for demanding installation environments.
Manufactured according to IEC international standards, the cable is widely used in medium voltage power systems requiring stable current carrying capacity, long service life, and enhanced protection against external mechanical impact.
What Is 20kV Single Core SWA Armoured Cable?
A 20kV Single Core SWA Armoured Cable is a single conductor medium voltage power cable protected by galvanized steel wire armour (SWA). The cable is designed for fixed installations where high mechanical strength and reliable power transmission are required.
The cable structure typically includes:
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Copper or aluminium conductor
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XLPE insulation
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Metallic screen
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Bedding layer
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Steel wire armour
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Outer sheath
SWA protection helps the cable resist:
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Mechanical damage
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Compression force
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Impact during installation
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Underground environmental stress
Cable Construction
| Layer | Material |
|---|---|
| Conductor | Copper or Aluminium |
| Conductor Screen | Semi-Conductive Compound |
| Insulation | XLPE |
| Insulation Screen | Semi-Conductive Compound |
| Metallic Screen | Copper Tape or Copper Wire |
| Inner Sheath | PVC |
| Armour | Galvanized Steel Wire Armour (SWA) |
| Outer Sheath | PVC / PE / LSZH |
Key Features and Advantages
- Excellent Electrical Performance:XLPE insulation provides low dielectric loss, stable insulation resistance, and reliable medium voltage transmission performance.
- Strong Mechanical Protection:Steel wire armour offers excellent tensile strength and impact resistance, making the cable suitable for underground installation, cable trays, tunnels, and industrial environments.
- High Temperature Resistance:Continuous operating temperature up to 90°C,Short-circuit temperature up to 250°C,This ensures reliable operation under heavy electrical load conditions.
- Suitable for Harsh Installation Environments:The outer sheath can provide resistance against Moisture,UV exposure,Chemicals,Oil,Abrasion and Corrosion,Optional anti-termite and rodent-resistant sheath compounds are available for tropical environments.
- Long Service Life: Premium conductor materials and strict production control help minimize transmission loss and improve long-term operational reliability.
Applications
20kV Single Core SWA Armoured Cables are widely used in:
- Medium voltage underground power distribution
- Utility transmission systems
- Substations and switchgear systems
- Renewable energy projects
- Solar power plants
- Wind farms
- Industrial facilities
- Mining projects
- Infrastructure and EPC projects
Technical Specifications
| Item | Specification |
|---|---|
| Rated Voltage | 12/20kV |
| Cable Type | Single Core |
| Conductor Material | Copper / Aluminium |
| Insulation | XLPE |
| Armour Type | Steel Wire Armour (SWA) |
| Outer Sheath | PVC / PE / LSZH |
| Maximum Operating Temperature | 90°C |
| Short Circuit Temperature | 250°C |
| Installation Method | Underground / Duct / Tray |
| Standards | IEC 60502-2, IEC 60228, IEC 60332 |
Important Installation Note
For AC single core systems, non-magnetic armour such as AWA (Aluminium Wire Armour) is commonly recommended to reduce eddy current losses. However, SWA single core cables may still be used in specific DC systems, grounding systems, or project-specific applications depending on engineering requirements.
Our engineering team can provide professional cable selection support according to your installation conditions and project specifications.
Available Customization Options
We provide customized medium voltage cable solutions including:
- Copper conductor or aluminium conductor
- PVC, PE, or LSZH outer sheath
- Flame retardant cable
- UV resistant cable
- Anti-termite sheath
- Water-blocking structure
- Customized drum packaging and cable marking
Quality Control and Testing
Every cable undergoes strict factory inspection before shipment, including:
- Conductor resistance testing
- Voltage withstand testing
- Partial discharge testing
- Mechanical performance testing
- Insulation thickness inspection
- Finished cable routine testing
Our manufacturing system complies with:
- ISO 9001
- ISO 14001
- ISO 45001
All testing equipment is regularly calibrated to ensure accurate and reliable quality control results.
Why Choose Zhongdong Cable?
Zhongdong Cable is an experienced manufacturer of medium voltage power cables for global utility, industrial, and renewable energy projects.
Our Manufacturing Advantages
- 67,000+ m² production facility
- 30+ advanced cable production lines
- 35 professional testing systems
- Experienced engineering and export teams
- OEM and customized production support
- International project supply experience
- Fast delivery for EPC projects
We supply medium voltage armoured cables to customers across Asia, Africa, the Middle East, South America, and other international markets.
Standards and Compliance
Our 20kV Single Core SWA Armoured Cables can be manufactured according to:
- IEC 60502-2
- IEC 60228
- IEC 60332
- BS Standards
- ASTM Standards
- Customized technical specifications
Request a Quote
Looking for a reliable supplier of 20kV Single Core SWA Armoured Cable?
Contact Zhongdong Cable for:
- Technical support
- Factory pricing
- OEM manufacturing
- Datasheets and certifications
- Fast global delivery solutions
Zhongdong Cable, established in 2o06, is a leading Chinese cable manufacturer specializing in power, control, and solar cables. Operating from a 38,0o0-square-meter facility with advanced production lines, the company is ISO9o01 and IsO14o01 certified. Offering high-quality, customizable cables meeting international standards, Zhongdong provides solutions with features like flame retardant, waterproofing, and environmental friendliness. With a focus on quality, customer satisfaction, and innovation, Zhongdong Cable is dedicated to deliveringreliable products across various industries.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.