Anti-Mechanical Damage Direct Burial LV Cable for Public Infrastructure & Industrial Buried Distribution Projects
Podsumowanie produktu
Opis produktu
WDZ-YJY23 is a 0.6/1kV low-voltage fixed-laying power cable. It features a composite structure with all-low-smoke halogen-free raw materials, double-layer overlapping galvanized steel tape armor, and a PE outer sheath. Integrating fire safety and mechanical damage resistance, it is the preferred specification for underground direct burial, enclosed cable trenches, and outdoor concealed pipeline projects where both fire protection and external force protection are required.
Low-smoke, halogen-free flame-retardant rating; the filler and lining are made of halogen-free polyolefin compounds without PVC halogen content, producing low smoke and no corrosive gases during combustion, meeting green building fire protection acceptance standards;
Dense copper core + high-purity XLPE cross-linked polyethylene insulation layer, possessing excellent heat resistance and insulation stability;
Modified halogen-free LSZH inner lining layer, isolating the insulation core and steel armor, preventing scratches on the insulation layer during bending construction;
Double-layer wound galvanized steel strip armor + weather-resistant PE outer sheath; the steel strip withstands the crushing, puncture, and gnawing damage from underground rocks, construction waste, and rodents, while the PE sheath improves resistance to soil corrosion and outdoor aging.
Compared to similar products, the core difference in positioning of WDZ-YJY23 lies in its balance between resistance to compression and procurement costs. Unlike the unarmored WDZ-YJY (no mechanical protection, limited to indoor installation) and the round steel wire armored WDZ-YJY33 (high tensile strength, but higher cost for road/river crossings), WDZ-YJY23 is designed specifically for direct burial in urban soil and centralized cable duct installation in conventional environments. It is widely used in underground trunk lines of densely populated public buildings and outdoor buried distribution loops in factories. Optional core configurations include: single core, 2/3/4/5 cores, 3+1, 3+2, and 4+1 irregular composite cores, fully covering the design specifications for civil and industrial low-voltage power distribution.
0.6/1kV, suitable for 50Hz AC low-voltage power distribution systems;
90℃ under full load stable operation;
Maximum instantaneous temperature of 250℃ within 5 seconds of short circuit duration, capable of withstanding short-term overload impact without insulation failure;
3.5kV power frequency voltage for 5 minutes, no insulation breakdown or leakage;
XLPE insulation maintains stable insulation performance in humid underground environments and under seasonal temperature changes, reducing voltage drop losses in long-distance buried lines.
Class 2 tightly stranded annealed copper wire conforming to IEC60228 and GB/T3956 standards, using high-purity electrolytic copper raw materials. Tight stranding reduces internal gaps and improves heat dissipation efficiency.
1.5mm²~400mm² standard finished products are in stock; custom sizes of 500~630mm² and non-standard special core combinations can be customized according to construction drawings.
Strictly controlled below the upper limits of national and international standards, facilitating electrical engineers in calculating the line carrying capacity and voltage drop of long-distance buried pipelines.
Smooth outer surface after stranding, avoiding local electric field concentration, and stable conductivity after long-term alternating use in damp underground environments;
Continuously extruded in one step, with uniform wall thickness, possessing excellent resistance to electrical aging, water absorption, and puncture;
Environmentally friendly filler fills the gaps in the core wires, standardizing the circular outline of the cable and improving the overall flame retardant performance when multiple cables are densely laid in a duct;
Extruded buffer layer separates the insulated core wires and steel armor, eliminating the risk of scratching during cable bending and trench traction construction;
Two layers of overlapping galvanized steel strips effectively prevent damage caused by soil compression, puncture by sharp objects, and bites by rodents;
Added with additives to resist ultraviolet rays, soil microorganisms, and mild acids and alkalis, suitable for long-term buried use in ordinary urban soils and lightly polluted industrial soils.
≥ 0℃; for outdoor installation in high-altitude areas below -15℃, a customized low-temperature resistant formula is available.
for multi-core cables ≥ 15 times the outer diameter of the finished cable; for single-core cables ≥ 12 times the outer diameter of the finished cable.
≤ 3000m; for high-altitude areas (mining projects above 3000m), customized insulation versions are available.
- WDZ Low Smoke Halogen-Free Fireproof Safety Performance: Passes GB/T19666 and IEC60332-3 bundle flame retardant tests, with a smoke opacity ≥68%. It does not release toxic halogen acid gases during fires, ensuring evacuation visibility in enclosed underground pipe corridors and basement spaces;
- Double-Layer Steel Strip Armored Mechanical Protection: The double-layer overlapping steel strip structure eliminates the need for auxiliary steel pipe protection during direct burial construction, saving on pipeline accessory procurement and construction labor costs, and effectively preventing accidental mechanical damage during subsequent road excavation and facility renovation processes;
- XLPE insulation offers stable electrical performance: low dielectric loss coefficient, minimal capacitance fluctuation under peak and valley load variations, and lower power consumption compared to PVC-insulated YJV23 cables.
- PE outer sheath provides anti-aging and corrosion resistance: superior moisture resistance and soil corrosion resistance compared to traditional PVC-sheathed armored cables, making it suitable for long-term operation in outdoor trenches and semi-underground damp environments.
- Reasonable structural cost control: the flat steel strip armor design results in a smaller outer diameter and lower metal raw material consumption compared to round steel wire armored YJY33 cables, optimizing costs in conventional buried projects where heavy mechanical impact is not a concern.
- Extended service life design: Utilizing a fully optimized LSZH+PE composite outer structure, the rated design service life can reach 25 years under standard buried laying conditions, reducing maintenance and cable replacement costs for project owners.
- Compared to ordinary PVC... Compared to YJV23, WDZ-YJY23 is completely halogen-free: Traditional YJV23 uses halogenated PVC lining and sheath, which releases corrosive and toxic fumes when burned; WDZ-YJY23 uses a completely non-conductive layer and LSZH polyolefin material, meeting the mandatory requirements for green building and fire protection acceptance of public buildings in most countries.
- Compared to unarmored WDZ-YJY cables, WDZ-YJY23 offers improved armor protection: Unarmored models cannot withstand underground compression and rodent damage, limiting their application to indoor cable trays; WDZ-YJY23 uses steel armor, expanding its application to outdoor direct burial and underground pipeline installations.
- Flexible customized production services: Supports small-batch trial orders, segmented delivery, and customized irregular core layouts, helping customers reduce inventory backlog and capital tied up.
- Full-process online quality monitoring: The automated extrusion production line is equipped with real-time insulation thickness and steel strip overlap detection devices. Each batch of products undergoes smoke density and flame retardant sampling tests before leaving the factory to ensure batch performance consistency.
- Underground Power Distribution in Large Public Buildings: Underground basements and main trunk lines in general hospitals, international airports, and large shopping malls, prioritizing solutions with mandatory low-smoke, halogen-free fire resistance and mechanical damage resistance;
- Underground Power Lines in Industrial Parks: Buried power cables around light industrial manufacturing plants, food processing workshops, and integrated logistics parks, with concentrated cable trench laying, presenting challenges such as scattered construction waste and rodent infestation;
- Municipal Underground Pipeline Network Renovation: Upgrading community power grids in old urban areas, direct-buried power cables in roadside green belts, meeting designated specifications for municipal green projects;
- New Energy Auxiliary Supporting Projects: Buried main trunk lines in photovoltaic power station living areas and wind farm on-site office buildings, suitable for outdoor soil laying environments;
- Underground Integrated Pipe Gallery Auxiliary Cabling: Distribution power cables in urban integrated pipe galleries, dense cabling in enclosed spaces, with strict fire safety acceptance standards.
- Direct Burial Construction in Conventional Urban Soil: For ordinary, non-corrosive urban soil with a burial depth ≥0.8m, steel-tape armor is used instead of steel pipe protection, shortening the excavation and pipeline construction cycle.
- Dense Cable Layout in Utility Tunnels: WDZ-YJY23 is uniformly selected for all public building enclosed pipelines, replacing the halogen-containing YJV23, ensuring successful final acceptance by the local fire department.
- Laying around Lightly Polluted Industrial Parks: For slightly acidic or alkaline soils around chemical plants, corrosion-resistant, enhanced custom sheaths are used to extend cable lifespan.
- Government Budget Controlled Bidding Projects: For conventional municipal burial projects without ultra-high tensile strength requirements, WDZ-YJY23 is prioritized over the high-cost YJY33, balancing safety performance and total project investment.
From EPC procurement managers and electrical engineers at design institutes to overseas regional electrical distributors, the key verification points from multiple perspectives are as follows:
- Raw Material Qualification Confirmation: Before signing bulk contracts, suppliers must provide third-party inspection reports on low-smoke halogen-free compounds and electrolytic copper to confirm that no inferior recycled raw materials are mixed into the finished cables;
- Pre-shipment Third-Party Sampling Agreement: Include random sampling inspection clauses in the sales contract, allowing the buyer to designate a local authoritative testing agency to test flame retardancy, smoke density, and armor mechanical performance before container loading;
- Pre-order Parameters Technical Consultation: Clients need to submit project geological survey documents and electrical construction drawings to our professional low-voltage engineering team. We will provide free optimization of core wire cross-section and quantity selection to avoid on-site rework losses due to incorrect specifications.
- Delivery Cycle Coordination: We maintain factory stock of standard mainstream specifications for fast delivery within 5-8 working days. For non-standard customized specifications, a fixed production cycle is confirmed during the pre-purchase negotiation stage to match the overall project construction schedule.
- Export Packaging Optimization: Export-specification cables use moisture-proof plastic packaging + fumigated solid wood reel packaging. Our logistics team optimizes container stacking layout to improve container space utilization and reduce unit ocean freight costs for bulk buyers.
WDZ-YJY23 series products have passed inspections by multiple authoritative institutions and provide complete English certification documents for convenient overseas bidding and customs clearance at the destination:
- Domestic Standards: GB/T12706 Low-voltage Power Cable Standard, GB/T19666 Low-smoke Halogen-free Flame-retardant Cable Specification, GB/T2952 Armored Cable Production Standard;
- International Standards: Complies with the core clauses of IEC60502-1, IEC60332, and IEC61034, and conforms to the mainstream electrical access standards of emerging markets such as Southeast Asia, the Middle East, Central Asia, and Africa;
- Complete Certifications: CCC mandatory product certification, fire-resistant product type test certificate, CNAS laboratory test report, ISO9001 quality management system certification, and ISO14001 environmental management system certification, with complete English certification documents provided for overseas bidding;
- Customized Customs Clearance Assistance Services: Assistance in issuing certificates of origin and related customs documents to expedite customs clearance at the destination port and avoid customs detention and delays.
Project Overview: Overall power distribution project for a Grade A comprehensive hospital, with a total procurement of 29 kilometers of mixed WDZ-YJY23 cable (3×185+1×95, 4×150+1×70). Most of the cables were laid in underground cable ducts and concealed pipes in the basement of the hospital.
Rationale: Local public health engineering regulations clearly stipulate that underground cabling must use low-smoke halogen-free cables (LSZH). Underground ducts pose a risk of damage during later construction excavation; double-layer steel tape armor can prevent accidental cable breakage. Our complete set of English certified documents helped the winning EPC project pass the government's technical review, and all goods were delivered within 18 working days as stipulated in the contract.
Project Overview: This project involves the installation of underground power trunk lines for the factory area of a large-scale intelligent logistics park. The total order quantity is 36 kilometers, utilizing various specifications of WDZ-YJY23 cables. Cables will be laid directly in the soil around the factory buildings and in centralized cable trenches. The site is affected by rodent infestation and scattered construction debris.
Rationale for Selection: The outdoor underground environment requires rodent-proof protection against punctures. Furthermore, local green building standards prohibit the use of halogenated PVC cables. WDZ-YJY23 cables offer both fire resistance and mechanical protection, and are cost-effective. Our technical department provided a free English on-site installation manual. The finished product successfully passed local Ghanaian commodity inspection without the need for additional third-party testing fees.
Project Overview: Underground power pipeline renovation for a high-density residential community in the city center, involving the procurement of 43 kilometers of WDZ-YJY23 type pipelines of various specifications. The pipelines were directly buried in roadside green belts, and branch lines were laid in the community's integrated utility tunnel.
Rationale: The UAE municipal engineering department implements zero-halogen environmental standards for underground public lines. Roadside maintenance and construction pose potential risks of excavation and damage. Steel-sleeved sheaths can save on the overall steel pipe investment cost for the project. After the project's formal acceptance, the client signed an annual framework cooperation agreement for bulk procurement in the subsequent three phases of community renovation.
- Professional Dedicated Technical Service Team: Equipped with low-voltage application engineers and construction technical consultants, providing long-term partners with free pre-project specification matching consultation and remote on-site troubleshooting support;
- Full-Cycle Traceable Quality Management: Each roll of finished cable is affixed with a unique batch tracking code, covering raw material inspection, online production monitoring, and finished product sampling inspection, facilitating full-cycle quality traceability during project completion and acceptance;
- Diversified International Trade Cooperation Models: Supports multiple trade settlement methods including FOB/CIF/CFR, offering a dual cooperation scheme of small trial orders and annual long-term framework contracts. Framework clients enjoy tiered bulk purchase discount policies;
- Stable Spot Inventory and Global Logistics Linkage:Maintains real-time spot inventory of mainstream specifications at the factory and collaborates with multiple international freight forwarders to develop cost-effective customized transportation solutions, avoiding delivery delays caused by port congestion and seasonal logistics fluctuations;
- Flexible Capacity Reserved: Reserves some low-voltage production line capacity for strategic long-term partners to quickly respond to sudden emergency replenishment needs during the later stages of project construction.
