NA2XS(F)2Y 6/10 (12)kV Medium Voltage Cable

What is NA2XS(F)2Y 6/10 (12)kV Cable?

The NA2XS(F)2Y 6/10 (12)kV Cable is a single-core, aluminium conductor medium-voltage power distribution cable manufactured in accordance with IEC 60502-2, HD 620, and DIN VDE 0276-620 specifications. It is engineered for 10kV and 11kV primary distribution grids, utility substations, transformer connections, and industrial feeder lines that require protection against radial mechanical hazards and longitudinal moisture penetration.

The standard German DIN VDE designation details its physical construction: NA indicates an aluminium conductor manufactured to IEC 60228 Class 2; 2X denotes Cross-Linked Polyethylene (XLPE) dielectric insulation; S represents a concentric metallic screen of copper wires and copper equalizing tape; (F) specifies longitudinal waterblocking swellable tapes applied over and under the screen; and 2Y signifies a rugged Medium Density Polyethylene (MDPE) outer sheath. This construction provides continuous moisture protection rated to AD8, mechanical impact endurance to AG2, and UV stability under ISO 4892-3 for outdoor direct burial.

NA2XS(F)2Y 6/10 (12)kV Cable Construction

• Conductor: Class 2 stranded compacted circular aluminium conductor conforming to IEC 60228.
• Conductor Screen: Extruded semi-conductive compound bonded directly over the conductor to eliminate electrical stress points.
• Insulation: High-grade Cross-Linked Polyethylene (XLPE) compound with a nominal thickness of 3.40mm, delivering dielectric strength and thermal endurance up to +90°C.
• Insulation Screen: Extruded semi-conductive compound bonded to the XLPE insulation layer for uniform radial electrostatic field distribution.
• Inner Waterblocking Layer: Semi-conductive water-swellable tape wrapped beneath the copper screen to arrest longitudinal moisture migration along the insulation interface.
• Metallic Screen: Concentric annealed copper wires overlaid with a helically applied copper tape to carry earth fault currents.
• Outer Waterblocking Layer: Non-conductive swellable tape wrapped over the metallic screen for secondary moisture containment.
• Outer Sheath: Heavy-duty Medium Density Polyethylene (MDPE) compound compliant with EN 60229-4.1 for protection against abrasion, tearing, and environmental cracking.
• Sheath Colour: Available in Red or Black.

Applications

NA2XS(F)2Y 6/10 (12)kV cables provide power transmission across outdoor, subterranean, and industrial installations:

• Public & Private Utility Grids: Primary 10kV to 12kV distribution networks interconnecting municipal substations, ring main units (RMUs), and step-down transformers.
• Direct Burial in Ground: Heavy-duty underground runs in moisture-laden soils or areas with high seasonal water tables, leveraging dual waterblocking tapes and AD8 submersion resistance.
• Buried Cable Ducts & Tunnels: Installation inside underground duct banks, trenches, and concrete raceways susceptible to standing water.
• Renewable Energy Collector Networks: MV collector circuits connecting wind turbine base switches and commercial solar PV inverter stations.
• Industrial Manufacturing Complexes: Main external power feeds across petrochemical plants, steel mills, and mining operations requiring mechanical impact resistance (AG2) and chemical protection.

Specifications & Dimensions

Huadong Cable Group manufactures NA2XS(F)2Y 6/10 (12)kV cables across single-core aluminium cross-sections from 50mm² up to 1200mm² (including 50, 70, 95, 120, 150, 185, 240, 300, 400, 500, 630, 800, 1000, and 1200mm²). Rated for 6/10 (12)kV with a 21kV AC 5-minute dielectric test voltage, the series features nominal overall outer diameters from 23mm (50mm²) up to 63.6mm (1200mm²) and unit weights from 550 kg/km to 5,160 kg/km. Nominal XLPE insulation thickness is standardized at 3.40mm (minimum 2.96mm), complemented by copper screen cross-sections of 16mm², 25mm², or 35mm² delivering 1-second short-circuit screen current capacities from 3.2kA to 7.1kA. Permissible continuous current carrying capacity reaches up to 1,019A in ground (20°C), 928A in duct (30°C), and 1,304A in free air (30°C) for 1200mm² conductors under flat touching formation. Maximum pulling tension ratings span from 1,500 N up to 22,240 N, and maximum sidewall pressures reach 1,947 N/cm² under an installation bending radius of 15 times the overall diameter, fully conforming to IEC 60502-2 and VDE 0276-620 specifications.

Standards

Design & Material Standards: IEC 60502-2, HD 620, DIN VDE 0276-620, IEC 60228 Class 2
Water Resistance & Ingress: AD8 water submersion rating, Longitudinal waterblocking via dual swellable tapes
Mechanical & Environmental Performance: Abrasion and tear resistant to EN 60229-4.1, Impact rated to AG2 per EN 60364-5.51, UV resistant to ISO 4892-3
Halogen Content: Halogen-free according to IEC 60754
Electrical & Thermal Ratings: Voltage Rating Uo/U (Um): 6/10 (12)kV; Test Voltage: 21kV AC 50Hz (5 min); Conductor Max Temp: +90°C; Short Circuit Limit (5s): +250°C; Min Bending Radius: 15 × OD
Regulatory Directives: RoHS Directive 2015/65/EU, REACH EC 1907/2006, CE Marked

Frequently Asked Questions

Q: What does the “(F)” indicate in the NA2XS(F)2Y cable code?
A: The designation “(F)” certifies longitudinal waterblocking; it signifies that semi-conductive and non-conductive water-swellable tapes surround the copper wire screen, swelling upon moisture exposure to prevent water from travelling along the cable length.

Q: Why is an MDPE outer jacket preferred over standard PVC for underground installations?
A: MDPE provides enhanced mechanical toughness, puncture resistance, and tear strength (EN 60229-4.1), along with lower water absorption and UV resistance (ISO 4892-3), making it suitable for direct burial and duct pulling.

Q: How does the 6/10kV version differ dimensionally from the 12/20kV and 18/30kV cables?
A: Because of its lower voltage stress, the 6/10kV cable requires a 3.40mm nominal XLPE insulation thickness, resulting in a more compact overall diameter and lighter unit weight compared to the 5.50mm (20kV) and 8.00mm (30kV) versions.

Q: What commercial payment terms does Huadong Cable accept for international orders?
A: We accept standard international commercial payment terms, primarily Telegraphic Transfer (T/T, with 30% advance deposit and 70% against shipping documents) and 100% Irrevocable Letter of Credit (L/C) at sight.

NA2XS(F)2Y 6/10 (12)kV Cable – Why Choose Huadong Cable?

Huadong Cable Group manufactures NA2XS(F)2Y 6/10 (12)kV medium-voltage cables in strict adherence to IEC 60502-2, HD 620, and DIN VDE 0276-620 specifications. Utilizing electrical-grade aluminium rod, our high-speed stranding equipment manufactures compacted circular Class 2 conductors that deliver geometric roundness and low conductor DC resistance. Our triple-extrusion catenary continuous vulcanization (CCV) lines apply the conductor screen, high-cleanliness XLPE insulation, and bonded insulation screen in a single pass under dry nitrogen curing, preventing void formation and maintaining low partial discharge levels.

With more than 20 years of precision cable engineering expertise, Huadong Cable Group operates manufacturing and testing facilities certified to ISO 9001, CE, and RoHS protocols. Supplying directly from our manufacturing facility eliminates intermediary agent markups, allowing us to provide competitive factory pricing, 100% routine Mill Test Certificates (MTC) tested in accredited testing facilities, continuous drum packaging on ISPM 15 heat-treated export wooden reels, and dependable logistics for international electric utilities and EPC contractors worldwide.