WDZ-YJLHY23 LSZH Aluminum Alloy Steel Tape Armored Power Cable for Underground Direct Burial & Public Infrastructure
Resumen del producto
Descripción del producto
- WDZ:
- Low-smoke, zero-halogen, and flame-retardant properties
- YJ:
- Cross-linked polyethylene (XLPE) insulation
- LH:
- AA8030 series aluminum alloy conductor (creep-resistant alloy)
- Y:
- Low-smoke zero-halogen (LSZH) polyolefin bedding layer
- 23:
- Double steel tape armor + polyethylene outer sheath, providing mechanical protection for underground installation
WDZ-YJLHY23 is a cost-optimized, heavy-duty power cable designed for fixed power transmission and distribution circuits in harsh environments—such as underground, damp, or high-abrasion settings—while meeting strict fire safety standards for public building infrastructure. Unlike standard pure-aluminum conductor YJLV23 cables or copper-core WDZ-YJY23 cables, this model utilizes aluminum alloy conductors to resolve common issues associated with standard aluminum cables, such as long-term creep deformation and loose terminal connections. It features double steel tape armor for crush and impact resistance and employs an LSZH flame-retardant structure to comply with fire safety regulations.
Electrical design institutes, general contractors, municipal engineering firms, electrical distributors, and renewable energy developers frequently select WDZ-YJLHY23 for large-scale, long-distance trunk lines and projects involving direct burial, cable trenches, utility tunnels, and service galleries, thereby achieving a balance between total installation costs, long-term operational stability, and fire safety code compliance.
- National Standards: GB/T 31840, GB/T 12706, GB 31247 (Low-smoke, zero-halogen fire safety standard)
- International Standards: IEC 60228, IEC 60502-1, IEC 60332-3 (Flame retardancy rating), IEC 60754 (Halogen emission test)
- Optional Ratings: WDZA / WDZB / WDZC flame retardancy grades (customizable based on project design specifications)
Utilizes compacted circular stranded aluminum alloy, processed via precision annealing and forming techniques; effectively inhibits thermal creep under conditions of long-term overload and thermal cycling, thereby eliminating risks of terminal loosening and overheating common with standard pure aluminum conductors. Conductivity reaches 61.8% of the IACS benchmark, ensuring stable power transmission. Cross-sectional area range: 1.5mm² – 630mm².
Utilizes high-density cross-linked polyethylene (XLPE) insulation, with thickness uniformity ensured through in-line eccentricity monitoring; offers excellent heat resistance, aging resistance, and partial discharge resistance, maintaining stable dielectric properties under fluctuating loads.
Employs halogen-free circular fillers to provide the internal structure with robust compressive strength, preventing core twisting during bending and installation, while isolating the armor from the insulated cores to prevent frictional wear.
Features a galvanized double steel tape wrap structure that effectively protects the cores against external crushing, soil pressure, excavation impacts, and rodent damage; ensures structural integrity, making it suitable for direct-burial underground installation.
Utilizes a low-smoke, zero-halogen (LSZH), flame-retardant polyethylene (PE) sheath offering superior moisture and soil corrosion resistance, along with UV protection for exposed sections; emits no toxic halogen gases during combustion, and its low smoke density facilitates safe evacuation in the event of a fire.
- Rated voltage: 0.6/1 kV (standard); 1.8/3 kV and 3.6/6 kV versions available upon request
- Long-term continuous operating temperature: Maximum conductor temperature 90°C
- Short-circuit withstand temperature (≤5s): Peak 250°C
- Installation ambient temperature: ≥0°C; preheating required for installation below 0°C
- Minimum bending radius: Armored finished cable ≥15 * cable outer diameter
- Flame retardancy grade: Class A, B, or C available upon request
- Smoke light transmittance during combustion: ≥60% (low visible smoke density)
- Halogen emission: Halogen-free; no corrosive acidic gases produced under fire conditions
- Total heat release and smoke production comply with Class B1 building fire safety standards
Available in various core configurations—including single-core, 2-core, 3-core, 4-core, and 5-core, as well as 3+1, 3+2, and 4+1 combinations—to fully meet the design requirements of three-phase four-wire and three-phase five-wire power distribution systems.
Includes factory inspection reports, raw material inspection certificates, flame-retardant performance test reports, smoke toxicity and halogen content test reports, and product certificates of conformity. To support overseas project bidding and customs clearance, CE and CCC certifications as well as customized international test certificates can also be provided.
Standard pure aluminum cables are prone to creep deformation after prolonged cycles of thermal expansion and contraction, leading to terminal overheating, loose connections, and electrical safety hazards. The WDZ-YJLHY23 cable utilizes AA8030 alloy conductors with optimized creep resistance; this ensures stable terminal connection torque, thereby lowering long-term maintenance costs and reducing the workload for on-site fault repairs for property managers and project operators.
For the same current-carrying capacity, aluminum alloy cables weigh only about 50% as much as copper cables. This reduction not only lowers costs associated with overhead hoisting, support structure load-bearing requirements, transportation, and civil engineering support for long-distance trunk lines, but also offers significant overall budget advantages for large-scale infrastructure projects.
The double steel-tape armored structure supports direct burial and offers resistance to crushing and excavation-related damage; the LSZH sheath complies with mandatory fire safety standards for public buildings. Combining mechanical protection, flame retardancy, and eco-friendly low-toxicity/low-smoke properties in a single cable eliminates the need for additional protective conduit in various trench installation scenarios.
The PE outer sheath effectively withstands soil acidity and alkalinity, groundwater penetration, and erosion by mold and microorganisms. Compared to PVC-sheathed armored cables, this cable offers a longer service life in environments such as damp utility tunnels, riverbank installations, and wet soil foundations. It is specifically designed for a stable operational lifespan exceeding 25 years under direct burial conditions.
The WDZ-YJLHY23 cable is specified in numerous municipal electrical design standards for critical projects involving public safety. Its comprehensive certification documentation streamlines project filing, fire safety inspections, and audits, enabling contractors to efficiently complete project acceptance and avoid delays caused by qualification issues.
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Municipal Underground Utility Tunnels and Road Renovation Projects
Main power distribution trunk lines within urban utility tunnels, buried power lines for road renovation, main incoming cables for underground parking garages, and municipal community grid upgrades requiring mechanical protection and flame-retardant capabilities.
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Rail Transit and Tunnel Projects
Auxiliary power distribution circuits for metro stations, wiring for pedestrian underpasses, and dedicated power supply circuits for ventilation, lighting, and surveillance systems in highway tunnels; its low-smoke, halogen-free properties comply with mandatory design standards for fire safety and evacuation in tunnels.
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Large-Scale Public Buildings and High-Rise Complexes
Suitable for main power supply lines in hospital ward buildings, airport terminals, stadiums, and exhibition centers; main riser cables in super-high-rise residential buildings; and emergency backup power circuits in commercial shopping centers. It is particularly well-suited for densely populated buildings subject to strict fire safety regulations.
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New Energy Generation Projects
Suitable for grid-connection transmission cables for ground-mounted photovoltaic power plants, long-distance collection trunk lines for wind farms, and underground distribution lines for energy storage stations. Its lightweight design reduces construction complexity and overall investment costs associated with long-distance installation.
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Corrosion-Resistant Cabling for Petrochemical and Industrial Parks
Suitable for auxiliary power circuits in chemical plants, underground power cables within industrial sites, and heavy-load distribution lines in workshops. Its corrosion-resistant sheath and flame-retardant structural design enable it to withstand industrial environments characterized by mild corrosivity.
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Case 1: Urban Utility Tunnel Phase II – Power Main Line Project
A municipal construction group selected WDZ-YJLHY23 4*240mm² cables as the primary incoming main lines for an urban underground utility tunnel expansion project. The original design specified copper-core armored cables, but the total budget exceeded the approved limit. After electrical calculations confirmed that the aluminum alloy cable option offered comparable current-carrying capacity, the client switched to the WDZ-YJLHY23 model, resulting in a 32% reduction in total cable procurement and transportation costs. Our team provided a comprehensive set of test documentation for the government tender application, coordinated phased deliveries to align with the civil construction schedule, and offered on-site technical guidance for cable laying and terminal crimping; the project ultimately passed all fire safety and municipal engineering inspections.
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Case Study 2: Electrical Retrofit Project for a County-Level Hospital Inpatient Building
This electrical retrofit project involved the underground laying of main power cables for a newly constructed ward building, necessitating strict adherence to fire safety standards and protective measures against damage during underground construction. The design specifications mandated the use of WDZ-YJLHY23 low-smoke, zero-halogen (LSZH) armored aluminum alloy cables. We provided pre-production sample testing, compiled a comprehensive set of certification documents for review and filing by health authorities, optimized the bill of materials for cable installation to minimize excess inventory, and coordinated material deliveries to the site during off-peak traffic hours. Post-installation periodic infrared thermography inspections confirmed stable terminal temperatures, with no risks of overheating detected after one year of operation.
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Case Study 3: Collection Line Project for a Large-Scale Ground-Mounted PV Power Plant
A renewable energy contractor procured a large quantity of WDZ-YJLHY23 multi-core cables for the installation of underground collection lines connecting photovoltaic arrays. Given the project's complex terrain and long installation distances, there were strict requirements regarding cost control, crush resistance (for burial in backfilled farmland), and outdoor aging resistance. The use of lightweight aluminum alloy cables significantly reduced labor and hoisting costs during on-site installation. We provided customized reel labeling, export-compliant wooden reel packaging, break-bulk container shipping, and batch quality sampling services to ensure consistency across the entire project, ultimately securing a framework order for the subsequent expansion phase.
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Low-Temperature Installation Control:
Cable installation is strictly prohibited when the ambient temperature is below 0°C. If winter construction is unavoidable, gradual pre-heating measures must be implemented to prevent the outer sheath from cracking during bending operations.
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Strict control of bending radius:
During conduit threading, directional changes in trenches, and vertical shaft installations, the bending radius must not fall below the specified minimum; excessive bending can damage internal insulation and armor layers, creating long-term risks of insulation breakdown.
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Standardized terminal connections:
Specialized aluminum alloy cable terminals must be used, employing standard crimping procedures and conductive paste to inhibit oxidation; direct copper-to-aluminum connections without transition terminals are strictly prohibited to prevent thermal runaway.
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Direct burial protection standards:
For direct burial installations, a bedding layer of fine sand must be laid above and below the cable, and warning bricks installed in accordance with electrical codes; safe clearance distances from water supply and gas pipelines must be maintained to prevent accidental damage from external construction activities.
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Joint sealing and moisture protection:
Compatible waterproof cable accessories must be used for intermediate joints and terminations; rigorous sealing measures are required to prevent groundwater from seeping into the conductor cores in damp, direct-burial environments.
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Storage and on-site handling regulations:
Cable reels should be stored in ventilated, dry warehouses and protected from prolonged exposure to sunlight and rain to delay sheath aging; reels must be placed flat and level to prevent armor deformation caused by stacking or crushing.
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Cable Tray Partitioning:
When placed in the same cable tray alongside non-flame-retardant cables, a partition must be installed to inhibit flame spread during a fire, ensuring compliance with national electrical wiring design standards.
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Comprehensive Customization and Blueprint Matching Capabilities
We manufacture WDZ-YJLHY23 cables across a wide range of cross-sections and multi-core configurations. We also support customization based on client blueprints, including specific finished lengths, custom sheath colors, reel markings, and non-standard packaging solutions. When designers need to switch from copper to aluminum specifications, our technical team provides assistance with cable selection and the validation of alternative solutions.
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Rigorous Quality Control for Raw Materials and Batch Production
We utilize only certified AA8030 aluminum alloy rods, high-purity cross-linked polyethylene (XLPE) insulation, certified low-smoke zero-halogen (LSZH) sheath materials, and galvanized steel tape. Before leaving the factory, every batch undergoes DC resistance testing, insulation resistance testing, and spot checks for flame retardancy and smoke emission performance, ensuring consistent quality for large-scale project orders.
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Comprehensive Documentation Packages for Bidding and Acceptance
We provide a one-stop service for compiling factory test reports, material certificates, fire-performance test documents, and certificates of conformity. We tailor documentation packages to meet specific requirements—such as government tenders, project filings, fire safety inspections, and overseas export customs clearance—thereby significantly reducing the time and manpower procurement teams spend on document organization and qualification verification.
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Flexible Order Volumes and Global Logistics Solutions
We accommodate a wide range of order sizes, from small-batch trial orders for preliminary testing and medium-scale stock production to large-scale, centralized bulk supplies for major infrastructure projects. We offer domestic "door-to-door" delivery. For overseas projects, we provide sea-worthy wooden reel packaging, container loading arrangements, and coordination services for complete export customs documentation.
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Professional Electrical Technical Support Team
Our team of senior electrical engineers offers complimentary services, including current-carrying capacity calculations, cable selection optimization, installation method consultations, bill of quantities (BOQ) preparation, and technical liaison with design institutes. We ensure rapid responses to on-site issues—such as installation, connection, and troubleshooting—to promptly resolve technical obstacles during the project.
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Long-term Cost Stability through Framework Agreements
For engineering firms, electrical wholesalers, and long-term bulk procurement clients, we offer pricing based on long-term framework agreements, tiered volume discounts, and raw material price-locking solutions. These measures effectively stabilize project procurement budgets and mitigate the risks associated with aluminum price fluctuations in long-cycle projects.
