AXQJ-F 12/20kV Cable

What is AXQJ-F 12/20kV Cable?

The AXQJ-F 12/20kV Cable is a specialized single-core and three-core medium-voltage power distribution cable manufactured in strict adherence to the Nordic standard SS 424 14 16. Operating at a rated system voltage of 12/20 (24)kV, it provides a safe, low-smoke, halogen-free (LSZH) power distribution solution for primary utility grids, transformer substations, industrial installations, and infrastructure projects where building safety regulations demand minimal smoke density and non-corrosive gas emissions under fire conditions.

The standardized Nordic designation specifies each functional layer: A denotes a circular stranded aluminium conductor; X represents dry-cured Cross-Linked Polyethylene (XLPE) dielectric insulation bounded by solid-capped semi-conductive screens; Q designates a halogen-free polyolefin protective outer sheath; J indicates an earth screen system comprising concentric copper wires with a counter-spiral binder; and -F certifies longitudinal waterblocking functionality via a threaded waterproof conductor design. Encased in a black, UV-resistant polyolefin jacket, AXQJ-F delivers low fire spread performance alongside weatherability across indoor cable runs, external ladder racks, and subterranean utility channels.

AXQJ-F 12/20kV Cable Construction

• Conductor: Threaded, round, waterproof aluminium conductor engineered to arrest longitudinal moisture migration along the strand interstices.
• Conductor Screen: Extruded semiconductive solid-capped Cross-Linked Polyethylene (XLPE) compound to maintain a uniform radial electrostatic field.
• Insulation: High-purity Cross-Linked Polyethylene (XLPE) compound delivering dielectric strength and continuous thermal endurance up to +90°C.
• Insulation Screen: Extruded semiconductive solid-capped Cross-Linked Polyethylene (XLPE) bonded directly to the dielectric layer.
• Metallic Screen: Semi-conducting bands and annealed copper wires bound with an equalizing counter-spiral to safely carry single-phase earth-fault currents.
• Outer Sheath: Heavy-duty, halogen-free, UV-resistant polyolefin compound delivering flame retardancy and resistance against solar radiation.
• Outer Sheath Colour: Industrial Black.

Applications

AXQJ-F 12/20kV medium-voltage cables are engineered for high-safety primary electrical energy distribution across indoor and outdoor installations:

• Indoor & Enclosed Facility Distribution: Installation inside commercial buildings, public infrastructure, tunnels, and data centers requiring low smoke propagation and non-toxic flue gases.
• Outdoor Cable Ladders & Open Passes: Fixed above-ground routing across external cable ladder racks in fields, substations, and industrial complexes exposed to sunlight.
• Channels, Ducts & Galleries: Power transmission through utility raceways, subterranean duct banks, and enclosed cable channels subject to high ambient humidity.
• Renewable Energy Collector Grids: MV collector circuits connecting wind turbine step-up transformers and centralized solar PV inverter hubs to main grid substations.
• Industrial Manufacturing Complexes: Main feeder lines for chemical plants, pulp and paper mills, and manufacturing plants requiring CPR-compliant LSZH cabling.

Specifications & Dimensions

Huadong Cable Group manufactures AXQJ-F 12/20 (24)kV cables across single-core sizes from 50/16mm² up to 630/35mm² and three-core assemblies from 50/16mm² up to 240/35mm² in strict compliance with SS 424 14 16. Rated for a nominal operational voltage of 12/20 (24)kV within a continuous conductor operating temperature envelope up to +90°C, a minimum installation temperature of -15°C, and a maximum short-circuit threshold of +250°C (up to 5 seconds), single-core configurations feature nominal conductor diameters ranging from 29mm to 52mm and nominal cable weights from 820 kg/km up to 3,450 kg/km. Three-core assemblies feature nominal conductor diameters from 55mm to 79mm and nominal weights spanning 2,470 kg/km to 5,870 kg/km. All physical dimensions, insulation properties, copper screening capacities, and electrical conductor resistance parameters strictly conform to European and Nordic technical standards.

Standards

Design & Material Standards: SS 424 14 16
Reaction to Fire & Construction Regulation: European Regulation EN 50575 (CPR Compliant); low fire spread and less harmful flue gas generation
Electrical & Voltage Ratings: Voltage Rating Uo/U (Um): 12/20 (24)kV; Maximum Operating Temperature: +90°C; Maximum Short-Circuit Temperature: +250°C; Minimum Installation Temperature: -15°C
Sheath & Environmental Characteristics: Halogen-free, UV-resistant polyolefin compound
Regulatory Compliance: RoHS Directive 2015/65/EU, REACH Regulation EC 1907/2006, CE Marked

Frequently Asked Questions

Q: What is the primary difference between AXQJ-F and AXLJ-F cables?
A: While both cables feature 12/20kV waterproof aluminium conductors, AXQJ-F uses a halogen-free polyolefin outer sheath designed for low fire spread and non-toxic flue gases (“Q”), whereas AXLJ-F utilizes a standard polyethylene outer sheath (“J”) optimized for general outdoor toughness.

Q: Why is the AXQJ-F cable specified for indoor tunnels and building risers?
A: The halogen-free polyolefin jacket significantly reduces toxic and corrosive acid gas emission during a fire and restricts flame propagation, preventing damage to sensitive electronics and protecting human life in enclosed spaces.

Q: How does the threaded round waterproof aluminium conductor function?
A: The aluminium conductor features water-blocking materials integrated within its strand interstices that swell upon contact with moisture, preventing water from traveling longitudinally along the core if the cable outer layers are punctured.

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.

AXQJ-F 12/20kV Cable – Why Choose Huadong Cable?

Huadong Cable Group manufactures AXQJ-F 12/20 (24)kV medium-voltage cables in strict compliance with the SS 424 14 16 standard and European CPR fire regulations. Using electrical-grade aluminium rod, our high-speed stranding machinery produces compact, circular threaded conductors integrated with waterblocking barriers to ensure longitudinal watertightness. In our triple-extrusion catenary continuous vulcanization (CCV) lines, the semiconductive solid-capped conductor screen, high-purity XLPE insulation, and solid-capped insulation screen are applied simultaneously under pressurized dry nitrogen vulcanization, eliminating void formation and keeping partial discharge levels well below international limits.

Backed by more than 20 years of precision cable engineering expertise, Huadong Cable Group operates testing laboratories accredited under ISO/IEC 17025 and quality management systems certified to ISO 9001 and CE frameworks. Direct factory supply eliminates intermediary agent markups, allowing us to provide competitive factory pricing, 100% routine electrical and spark testing verified by certified 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 infrastructure EPC contractors worldwide.