YJV72 0.6/1kV Non-Magnetic AWA Armored Power Cable | Single-Core Anti-Circulatin

• YJV72: Standard non-magnetic aluminum conductor armored cable; suitable for single-core cable applications requiring the prevention of circulating currents and high tensile strength.
• ZR-YJV72: Flame-retardant version of YJV72; complies with wiring specifications for fire-rated compartments in power distribution systems for public buildings.
• NH-YJV72: Fire-resistant version of YJV72; specifically designed for single-core output circuits serving emergency fire-safety backup power supplies.
• WDZ-YJV72: Low-smoke, zero-halogen, flame-retardant version of YJV72; suitable for subways, underground utility tunnels, and enclosed public infrastructure with high population density.

• Conductor: High-purity oxygen-free annealed copper, Class 2 compacted stranded structure, copper purity ≥99.95%; standard cross-sectional area range: 10mm² to 630mm² (see specifications list for details)
• Semi-conductive inner screen: Eliminates electric field concentration at the conductor surface, ensuring a safety margin for long-term insulation performance
• Extruded XLPE insulation: Uniform and controllable wall thickness, stable insulation resistance, and excellent heat resistance and resistance to cracking under long-term load fluctuations
• Color-coded insulated cores: Distinct insulation colors facilitate phase identification, on-site wiring inspection, and subsequent maintenance and troubleshooting
• Non-hygroscopic PP filler: Fills gaps between cores to form a regular circular cable cross-section, preventing core displacement during cabling, armoring, and extrusion processes
• Wrapping tape: Envelops the core assembly to protect the insulation layer from damage during the application of the aluminum wire armor
• PVC inner bedding: Isolates the core assembly from the armor layer and acts as a buffer against friction and deformation caused by cable tension
• Helical non-magnetic aluminum wire armor: Key functional layer; eliminates circulating currents in single-core cables and withstands significant axial tension as well as external impact and crushing forces
• Tightly extruded PVC outer sheath: Abrasion-resistant, UV-resistant, and waterproof; suitable for direct burial, damp locations, and semi-outdoor fixed installations

• Rated operating voltage: U0/U = 0.6/1 kV; designed specifically for 50 Hz AC low-voltage power distribution systems
• Power-frequency withstand voltage test: 3500 V; no insulation breakdown after 5 minutes
• DC conductor resistance at 20°C: Fully compliant with GB/T 3956 standards; resistance values ​​are strictly controlled to minimize excessive voltage drop and line losses during long-distance single-core power transmission
• Insulation resistance at ambient temperature: ≥100 MΩ·km; ensures an adequate safety margin for insulation during continuous full-load operation
• Short-circuit temperature limits: Maximum instantaneous conductor temperature ≤250°C; maximum short-circuit duration ≤5 seconds
• Unique electrical advantages: Utilizes a non-magnetic armor structure to effectively suppress eddy current and circulating current losses; compared to steel-armored YJV32 cables, the additional heat generation in these single-core cables is reduced by more than 80%

• Maximum continuous operating temperature of conductor: ≤90°C; features excellent overload tolerance and resistance to thermal aging.
• Minimum installation ambient temperature: ≥0°C; preheating is required for installation below 0°C to prevent sheath embrittlement or cracking.
• Storage temperature range: -20°C to +50°C; prolonged exposure to rain or direct sunlight is strictly prohibited.
• Environmental adaptability: Resistant to corrosion from moist soil, mild salinity/alkalinity, and trace chemical vapors; suitable for low-lying areas with seasonal water accumulation and coastal saline-alkali terrain.

• Minimum bending radius (Single-core YJV72): ≥20 times the cable outer diameter.
• Tensile performance: Tensile load-bearing capacity exceeds that of standard YJV32 steel-wire armored cables; suitable for ultra-long vertical suspension, steep slopes, river crossings via pipe jacking, and terrain prone to ground subsidence.
• Core configuration: YJV72 is designed specifically for single-core applications; multi-core non-magnetic armored solutions utilize different model specifications.
• Customization services: Non-standard cross-sections, special sheath formulations, and termite-resistant or anti-corrosive outer sheaths can be customized according to project specifications.

YJV22 (steel tape armored) and YJV32 (steel wire armored) cables utilize ferromagnetic structures; when three single-core cables are laid in a phase-separated configuration, alternating magnetic fields induce significant circulating currents within the steel armor, resulting in additional heat loss, temperature rise, energy waste, and accelerated insulation aging. YJV72 employs non-magnetic aluminum wire armoring, fundamentally eliminating eddy current and circulating current losses; it is the mandated model for single-core outgoing circuit designs connecting to distribution transformers and box-type substations, ensuring compliance with the mandatory requirements of national electrical design standards.

The cable utilizes a non-magnetic aluminum wire helical wrap structure. This design withstands immense axial tensile stress—such as that caused by ultra-long vertical installations, river-crossing suspension, and ground settlement—while simultaneously resisting radial crushing, puncture by sharp objects, vehicular loads, and rodent damage during underground backfilling and operation. This structure effectively eliminates risks common to traditional armored cables in complex geological environments, such as armor breakage, sheath perforation, and internal conductor fracture, thereby significantly reducing post-installation maintenance and rework costs.

The use of cross-linked polyethylene (XLPE) insulation provides superior resistance to high temperatures, oxidative aging, and thermal deformation, with performance metrics far exceeding those of PVC-insulated armored cables. Under standard installation and rated load conditions, the cable is designed for a service life of up to 30 years, reducing capital expenditure on periodic cable replacement and upgrades for long-term operational projects such as power plants, hydroelectric stations, and cross-river municipal infrastructure.

Offers a range of customizable structural specifications to satisfy diverse project acceptance criteria and technical standards:

• ZR-YJV72 (Flame-retardant): Suitable for single-core substation feeder trunk lines and dedicated circuits for power distribution rooms in commercial complexes.
• NH-YJV72 (Fire-resistant): Suitable for single-core dedicated vertical circuits supplying emergency power to equipment such as fire pumps and smoke exhaust fans.
• WDZ-YJV72 (Low-smoke, zero-halogen): Suitable for single-core power distribution systems in subways, underground utility tunnels, hospitals, and densely populated enclosed public buildings.
• Customized YJV72 with anti-corrosion and anti-termite sheathing: Designed for installation environments involving coastal saline soil, chemical industrial parks, and areas with severe rodent activity.

The density of aluminum wire is significantly lower than that of galvanized steel wire; for the same level of armored protection, the YJV72 cable is lighter overall. This reduces lifting loads during shaft installation, lowers requirements for manual labor and construction machinery, shortens the electrical installation schedule, and effectively controls on-site labor costs.

Main trunk cables (single-core) for distribution transformer incoming and outgoing lines; dedicated low-voltage outgoing circuits for box-type substations; vertical single-core main wiring within switchgear; and cables laid with phase separation in substation cable trenches to prevent circulating currents.

Single-core underground power transmission lines installed via river-crossing pipe jacking; long-distance underwater cable installations via pulling methods; power supply cables for flood control levees in areas prone to ground subsidence; and road-crossing installations using directional drilling and pulling techniques.

Single-core vertical riser main power cables connecting transformer rooms to power distribution rooms; dedicated single-core vertical circuits for fire emergency power supplies; and buried single-core distribution lines in deep-excavation basement areas prone to settlement.

Single-core power lines within hydropower plant shafts; long-distance buried power supply cables for large-scale drainage pumping stations; tensile-resistant buried distribution lines for reservoir flood control equipment; and fixed-installation lines within damp underground culverts.

Single-core outgoing cables for coastal wind power step-up substations; buried transmission lines in intertidal saline-alkali soil; corrosion-resistant single-core trunk lines for coastal industrial parks; and tensile-resistant power cables connecting offshore platforms to the shore.

Project Requirements: The project involved three sets of distribution transformer single-core feeder circuits requiring phase-segregated installation within cable trenches. The original YJV32 steel-tape armored cables had caused severe overheating due to circulating currents; a non-magnetic solution compliant with electrical design standards was urgently needed.

Solution Implemented: YJV72 non-magnetic armored single-core power cables (185mm² and 240mm² specifications), with a total supply volume of 132,600 meters.

Project Outcomes: The project successfully passed reviews by the electric power design institute and acceptance inspections by the grid company. After two years of operation, the overheating issue caused by circulating currents was completely eliminated, and cable operating temperatures remained within design limits, earning high recognition from the power bureau and the EPC general contractor.

Project Requirements: Installation of an 820-meter river-crossing section via pipe-jacking; cables subjected to immense tensile force during the pulling process; risk of long-term minor foundation settlement; use of three single-core cables laid in a phase-separated configuration, requiring resistance to circulating currents.

Solution Implemented: Custom-manufactured high-tensile-strength reinforced YJV72 150mm² single-core armored cables (total order length: 98,300 meters).

Project Outcome: The pipe-jacking and pulling operation was successfully completed with no armor deformation or conductor damage; the system has operated stably since commissioning, passed the municipal project acceptance inspection, and eliminated the need for future maintenance involving riverbed excavation.

• GB/T 12706.1-2020: Power cables with extruded insulation and their accessories for rated voltages from 1 kV to 35 kV – Part 1: Cables for rated voltages of 1 kV and 3 kV
• GB/T 3956: Conductors of cables and wires
• GB/T 18380: Test on vertical flame spread of vertically-mounted bunched wires or cables
• GB/T 12666: Test methods for flame-retardant and fire-resistant cables
• National electrical design code requirements regarding the prevention of circulating currents in single-core cables

• CCC (China Compulsory Certification) applicable to standard power engineering specifications
• CE certification (compliance with EU Low Voltage Directive 2014/35/EU)
• ISO 9001 (Quality Management System), ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System) certifications
• Provided per order batch: Batch factory inspection reports, non-magnetic performance test reports, raw material traceability certificates, and dimensional & electrical performance inspection reports
• Provision of IEC 60502 standard test documentation and local power industry tender registration/certification materials, subject to regional requirements

• Rigorous incoming material inspection to eliminate potential quality issues during later project stages

  All raw materials—including copper rods, high-purity aluminum wire, and XLPE resin—are sourced from fully qualified, reputable large-scale smelters and chemical enterprises. Prior to production, comprehensive inspections are conducted on copper purity, non-magnetic consistency of aluminum wire, tensile strength, insulation formula stability, and the consistency of armor wrapping density. We strictly prohibit the use of recycled copper, substandard aluminum wire, or recycled plastics. This effectively prevents issues such as excessive conductor resistance, armor deformation, sheath cracking, and insulation breakdown, helping buyers avoid the risks of project rework, rectification, and claims arising from substandard cables.

• Flexible customization services to meet specific project technical requirements

  We support customization of conductor cross-sections, non-standard dimensions, and structural properties—such as flame-retardant, fire-resistant, low-smoke zero-halogen (LSZH), anti-termite, and anti-corrosion capabilities. Sheath colors, surface print content, and meter-marking methods can be customized according to client construction drawings and tender technical specifications. We also provide sample reels for preliminary non-magnetic and tensile performance testing, enabling design institutes and engineering companies to verify the product before formal bidding.

• Factory-direct sales model to maximize project gross margins

  Eliminates wholesaler markups; offers negotiable unit prices for bulk orders from major power grids and substations, while setting reasonable minimum order quantities (MOQs) to meet the needs of small and medium-sized electrical contractors. Provides consolidated shipping (LCL) solutions for large-scale overseas buyers to reduce overall maritime logistics costs.

• Comprehensive technical support for electrical engineers throughout the project lifecycle

  A professional electrical engineering team provides services including circulating current loss calculations, tensile load analysis, ampacity and line loss calculations, product selection advice, optimization of phase-segregated laying schemes, and the drafting of technical specifications for tenders.

  Supplies official technical datasheets, cable dimension drawings, non-magnetic performance test reports, and on-site wiring guides to facilitate drawing reviews and approval processes.

  Transparent production progress tracking and comprehensive pre-shipment electrical and mechanical performance testing ensure on-time delivery for urgent tender projects.

  Offers remote technical consultation to assist in resolving installation and commissioning challenges for overseas substation and infrastructure projects.

• Export-standard packaging and complete customs documentation

  Packaging utilizes export-grade heavy-duty wooden cable reels, featuring internal moisture-proof wrapping and external impact protection; the reel structure is specially reinforced to withstand long-distance, cross-border multimodal (sea and land) transport of heavy armored cables. Comprehensive packing lists, commercial invoices, certificates of origin, and other customs clearance documents are provided to streamline export declaration processes for international buyers.

• Selection criteria: Clearly distinguish between the three types of armoring. YJV22 (steel tape armor) offers compression resistance but lacks tensile strength; YJV32 (steel wire armor) provides tensile strength but generates circulating currents when single-core cables are laid in a segregated phase configuration; YJV72 (non-magnetic aluminum wire armor) is the only compliant choice for single-core segregated phase installation to eliminate eddy current losses. Substituting YJV72 with YJV32 is strictly prohibited to avoid design non-compliance and failure to pass grid acceptance inspections.
• Compliance with bending radius rules: Strict adherence to minimum bending radius requirements is mandatory during conduit pulling, routing around bends, and pipe-jacking operations. Excessive bending can deform the aluminum wire wrap structure, leading to armor wire displacement and compression-induced latent cracks in the internal insulation layer.
• Laying specifications for single-core cables (three-phase configuration): When using three YJV72 single-core cables for three-phase power transmission, they must be laid in an equilateral triangular formation; it is strictly prohibited to lay all three cables together inside a single enclosed steel pipe over long distances.
• Tension control for vertical laying: During installation in extra-long vertical shafts, specialized cable fixing clamps must be installed at specified intervals to distribute tensile stress caused by the cable's own weight, thereby preventing armor slippage and conductor deformation due to excessive tension concentration.
• Direct burial specifications: When directly burying YJV72 cables, a bedding layer of fine sand must be placed beneath and above the cable, and warning bricks or warning tape must be installed overhead; direct contact between the outer sheath and sharp gravel or debris must be avoided to prevent sheath puncture or damage.
• Armor grounding specifications: During cable termination, the aluminum wire armor layer must be reliably grounded at both ends; specialized armored cable connectors (sealing sleeves) must be used to ensure grounding circuit continuity and prevent the accumulation of induced voltage on the armor layer.
• Storage management regulations: Finished cable reels must be stored in a dry, well-ventilated warehouse; prolonged exposure to rain and direct sunlight outdoors must be avoided to delay sheath aging and extend shelf life.
• Voltage application limits: This product is a low-voltage cable rated at 0.6/1 kV; it must not be used for medium- or high-voltage transmission lines to avoid insulation breakdown caused by voltage overload.

If you are working on a substation or infrastructure project and require a quote, technical specifications, non-magnetic performance test data, confirmation of customized construction, or expert consultation on cable selection and phase-segregated laying plans for YJV72 cables, please submit your requirements via the inquiry form on our website. Please be sure to specify the required single-core cross-sectional area, total order quantity, cable type (e.g., flame-retardant, fire-resistant, or LSZH), and the destination country. Our professional cable engineering team will provide a tailored technical solution and a highly competitive quote within 24 working hours. We warmly welcome the opportunity to establish long-term framework partnerships with global power EPC contractors, power system integrators, electrical distributors, and power engineering design institutes.