NA2XS(FL)2Y 6/10 (12)kV Cable

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

The NA2XS(FL)2Y 6/10 (12)kV Cable is a single-core aluminium conductor medium-voltage power distribution cable engineered according to IEC 60502-2, HD 620, and DIN VDE 0276-620 standards. It is designed for 10kV and 11kV primary distribution grids, utility substations, transformer feeders, and renewable energy collector circuits where dual protection against radial moisture diffusion and longitudinal water travel is essential.

The German DIN VDE classification details each component of its construction: NA indicates an aluminium conductor manufactured to IEC 60228 Class 2; 2X specifies Cross-Linked Polyethylene (XLPE) dielectric insulation; S represents a concentric metallic screen of annealed copper wires and equalizing copper tape; (FL) designates complete waterblocking protection combining longitudinal water-swellable tapes (F) with a laminated radial Aluminium/Polyester moisture barrier (L) bonded to the jacket; and 2Y denotes a Medium Density Polyethylene (MDPE) outer protective sheath. This integrated multi-barrier structure provides AD8 submersion water resistance, AG2 mechanical impact endurance, and ISO 4892-3 UV stability for harsh direct-burial utility environments.

NA2XS(FL)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: 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 Longitudinal Waterblocking: Semi-conductive water-swellable tape applied beneath the copper screen to stop longitudinal moisture migration along the insulation interface.
• Metallic Screen: Concentric annealed copper wires overlaid with a helically bound copper tape to safely carry system fault currents.
• Outer Longitudinal Waterblocking: Non-conductive swellable tape wrapped over the metallic screen for secondary moisture containment.
• Radial Waterblocking: Aluminium/Polyester (Al/PET) copolymer-coated tape applied longitudinally and tightly bonded to the inner surface of the outer sheath to form an impermeable moisture barrier.
• Outer Sheath: Medium Density Polyethylene (MDPE) compound complying with EN 60229-4.1 for protection against abrasion, tear, and environmental cracking.
• Sheath Colour: Available in Red or Black.

Applications

NA2XS(FL)2Y 6/10 (12)kV cables provide power transmission across severe subterranean, wetland, and industrial environments:

• Public & Private Utility Grids: Primary 10kV to 12kV distribution networks interconnecting municipal substations, ring main units (RMUs), and step-down transformers.
• Direct Burial in Water-Logged Soils: Subsurface trench routing in wetlands, marshlands, and areas with permanently high water tables, utilizing bonded Al/PET radial and swellable longitudinal water barriers.
• Buried Cable Ducts & Tunnels: Installation inside concrete raceways, underground utility banks, and duct systems susceptible to seasonal or continuous flooding.
• Renewable Energy Collector Networks: Medium-voltage collector circuits routing power from wind turbine base switches and commercial solar PV inverter stations.
• Industrial & Petrochemical Facilities: Main external distribution lines for manufacturing plants, mining operations, and refineries requiring AG2 impact protection and chemical durability.

Specifications & Dimensions

Huadong Cable Group manufactures NA2XS(FL)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 15-minute dielectric test voltage, the series features nominal overall outer diameters from 23mm (50mm²) up to 65.1mm (1200mm²) and unit weights spanning 550 kg/km to 5,355 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 988A in ground (20°C), 901A in duct (30°C), and 1,265A in free air (30°C) for 1200mm² conductors under flat touching formation. Maximum pulling tension ratings range 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
Waterblocking & Ingress Protection: Dual-barrier radial (bonded Al/PET tape) and longitudinal waterblocking (swellable tapes), Water resistant to AD8
Mechanical & Environmental Endurance: 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 (15 min); Conductor Max Temp: +90°C; Short Circuit Limit (5s): +250°C; Min Bending Radius: 15 × OD
Regulatory Compliance: RoHS Directive 2015/65/EU, REACH EC 1907/2006, CE Marked

Frequently Asked Questions

Q: What is the primary difference between NA2XS(F)2Y and NA2XS(FL)2Y 10kV cables?
A: The NA2XS(F)2Y cable incorporates longitudinal swellable waterblocking tapes only, whereas the NA2XS(FL)2Y features an additional radial moisture barrier composed of an Aluminium/Polyester (Al/PET) tape tightly bonded to the inner surface of the MDPE sheath. This radial barrier prevents moisture vapor diffusion into the insulation over decades of service in saturated ground.

Q: Why is Medium Density Polyethylene (MDPE) preferred over PVC for the outer jacket?
A: MDPE provides superior mechanical toughness, puncture resistance, and tear strength (EN 60229-4.1), along with lower moisture permeability and long-term UV resistance according to ISO 4892-3, making it suitable for direct underground burial and pulling through ducts.

Q: What is the benefit of using aluminium conductors over copper in 10kV distribution?
A: Class 2 stranded aluminium provides substantial capital savings and weight reduction across extended distribution feeders, reducing freight costs and installation pulling tensions while delivering stable electrical performance.

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

Huadong Cable Group manufactures NA2XS(FL)2Y 6/10 (12)kV medium-voltage cables in strict compliance with IEC 60502-2, HD 620, and DIN VDE 0276-620 specifications. Utilizing electrical-grade aluminium rod, our high-speed stranding equipment produces compacted circular Class 2 conductors that minimize overall cross-sectional diameter and surface roughness. In our triple-extrusion catenary continuous vulcanization (CCV) lines, the conductor screen, high-cleanliness XLPE insulation, and bonded insulation screen are co-extruded under pressurized dry nitrogen curing, ensuring void-free interfaces and negligible partial discharge levels. During the jacketing process, the copolymer-coated Al/PET laminate is bonded to the extruded MDPE outer sheath, creating a hermetic seal against radial water ingress.

Backed by more than 20 years of precision cable engineering expertise, Huadong Cable Group operates testing facilities accredited under ISO/IEC 17025 and certified to ISO 9001 and CE quality frameworks. Direct factory supply eliminates intermediary agent markups, allowing us to provide competitive factory pricing, 100% routine testing (including high-voltage AC withstand, dielectric loss, and partial discharge verification) documented via Mill Test Certificates (MTC), continuous drum cuts packaged on heavy-duty ISPM 15 heat-treated export wooden reels, and dependable logistics for international electric utilities and EPC contractors worldwide.