YJLHV22 Aluminum Alloy Armored Power Cable | Anti-Creep Underground Direct

• YJLHV22: Standard rare-earth aluminum alloy power cable with steel tape armor; suitable for conventional direct-burial and cable trench installations.
• ZR-YJLHV22: Flame-retardant version of YJLHV22; complies with fire-compartmentation wiring standards for public buildings and commercial complexes.
• NH-YJLHV22: Fire-resistant version of YJLHV22; designed specifically for emergency backup power circuits serving equipment such as fire pumps and smoke exhaust fans.
• WDZ-YJLHV22: Low-smoke, zero-halogen, flame-retardant version of YJLHV22; suitable for subways, underground utility tunnels, and enclosed public infrastructure with high population density.

• Rare-earth aluminum alloy conductor: Features an AA8030 compacted stranded structure, offering stable electrical conductivity and excellent creep resistance; standard cross-sectional area range: 10mm² to 630mm² (covering 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400, 500, and 630mm²).
• Semi-conductive inner shielding layer: Eliminates electric field concentration on the conductor surface, ensuring a safety margin for the insulation layer during long-term operation.
• Extruded cross-linked polyethylene (XLPE) insulation layer: Offers uniform and controllable insulation thickness and stable insulation resistance; exhibits excellent heat and crack resistance under conditions of fluctuating long-term loads.
• Color-coded insulated cores: Distinct insulation colors for each core facilitate phase identification, on-site wiring inspection, and subsequent maintenance and troubleshooting.
• Non-hygroscopic polypropylene (PP) filler: Fills the gaps between cores to ensure a round cable profile and prevents core displacement during cabling, armoring, and extrusion processes.
• Binding tape: Wraps the assembled cores to protect the insulation layer from damage during the steel tape armoring process.
• PVC inner bedding layer: Isolates the core assembly from the armor layer, buffering against friction and deformation stresses during cable extrusion and forming.
• Double-layer galvanized steel tape armor: Serves as the primary mechanical protection layer, resisting external crushing, impact, and rodent damage during direct-burial backfilling operations.
• Tightly extruded PVC outer sheath: Abrasion-resistant, UV-resistant, and waterproof; suitable for direct underground burial, damp environments, and semi-outdoor fixed installations.

• Rated operating voltage: U0/U = 0.6/1 kV; designed for 50 Hz AC low-voltage power distribution systems.
• Power-frequency withstand voltage test: 3500 V; no insulation breakdown within 5 minutes.
• DC conductor resistance at 20°C: Fully compliant with the GB/T 31840 standard for aluminum alloy conductors; resistance values ​​are strictly controlled to minimize excessive voltage drop and line losses during long-distance 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 alloy advantages: Long-term creep deformation rate is significantly lower than that of standard pure aluminum conductors, effectively preventing terminal loosening and overheating failures during long-term operation.

• 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 coastal terrain and low-lying areas subject to seasonal water accumulation

• Minimum bending radius (multi-core YJLHV22): ≥15 times the cable outer diameter
• Minimum bending radius (single-core YJLHV22): ≥20 times the cable outer diameter
• Mechanical load characteristics: Withstands radial compression and impact pressure; not suitable for applications involving significant axial tension (for tensile strength requirements, please select the steel-wire armored YJLHV32 type)
• Standard core configurations: 1, 2, 3, 3+1, 3+2, 4, 4+1, and 5 cores; customization of non-standard core configurations is available based on specific project drawing requirements

Standard YJLV22 cables utilize pure aluminum conductors, which are prone to slow creep deformation under long-term thermal cycling and mechanical pressure; this leads to risks such as loose terminal bolts, increased contact resistance, and sustained overheating. YJLHV22 cables employ AA8030 rare-earth modified aluminum alloy conductors featuring an optimized internal grain structure and an extremely low creep rate. This ensures stable terminal connection pressure over decades of operation, thereby significantly reducing the need for line maintenance and the risk of fire hazards for owners and contractors after project commissioning.

Raw material costs are significantly lower than those of copper-core YJV22 cables; for equivalent current-carrying capacity designs, the overall project investment for YJLHV22 can be reduced by 35%–50%. Compared to YJLV22 pure aluminum cables, this product offers substantial savings in long-term operation and maintenance costs due to its stable connection performance. It achieves a balance between initial procurement costs and full-lifecycle operating expenses, thereby significantly increasing profit margins for general contractors and developers.

The double-layer steel-tape armor provides reliable mechanical protection, effectively resisting punctures from sharp stones in the backfill, vehicle loads, soil compression, and rodent damage during both installation and operation. This structure prevents common issues associated with unarmored cables—such as sheath rupture, insulation damage, and water ingress—thereby reducing excavation and repair costs during the maintenance phase.

Cross-linked polyethylene (XLPE) insulation offers superior resistance to high temperatures, oxidative aging, and thermal deformation, with performance metrics far surpassing those of PVC-insulated armored cables. Under proper installation and rated load conditions, the cable has a design service life of up to 30 years; for long-term projects such as residential complexes, industrial parks, and municipal infrastructure upgrades, this significantly lowers the capital expenditure required for periodic cable replacement and system retrofitting.

A range of customizable structural specifications is available to meet diverse project acceptance criteria and technical standards:

• ZR-YJLHV22 (Flame-retardant type): Suitable for main power distribution lines within fire compartments of shopping malls, office buildings, and residential complexes.
• NH-YJLHV22 (Fire-resistant type): Suitable for dedicated emergency backup power circuits for fire pumps, smoke exhaust fans, and fire-resistant rolling shutters.
• WDZ-YJLHV22 (Low-smoke, zero-halogen type): Suitable for power distribution systems in subways, underground utility tunnels, hospitals, and enclosed public buildings with high occupant density.
• Customized anti-corrosion outer sheath YJLHV22: Suitable for coastal saline soils, chemical industrial parks, and geological environments with severe corrosive conditions.

• Urban and Rural Grid Upgrades and Municipal Road Power Distribution Projects
  • Centralized power supply trunk lines for road lighting; incoming lines for municipal distribution cabinets; long-distance transmission circuits for streetlights; underground direct-buried main cables for rural grid upgrades; power distribution wiring for pumping stations and drainage facilities.
• Large Residential Complexes and Real Estate Electrical Infrastructure
  • Low-voltage outgoing trunk lines from transformer rooms; main power cables in building utility shafts; power supply circuits for equipment in public areas; centralized distribution trunk lines serving multiple buildings; underground direct-buried power cable layouts within residential areas.
• Industrial Parks and Factory Workshop Power Distribution Systems
  • Main incoming cables for workshops; main power supply wiring for production line equipment; fixed power circuits for auxiliary motors; centralized trunk lines laid in factory cable trenches; long-distance transmission cables requiring direct-buried installation between factory buildings.
• Projects in coastal regions, saline-alkali soil areas, and corrosive geological environments
  • Underground distribution lines for coastal industrial parks; cabling in intertidal zone foundation backfill areas; underground trunk lines in low-corrosivity environments surrounding chemical parks; and anti-corrosion power cables for grid renovation in coastal towns.
• Electromechanical engineering projects for logistics parks, commercial complexes, and public buildings
  • Low-voltage distribution trunk lines for warehousing and logistics parks; power supply lines for central air-conditioning units; backup power lines for elevators and fire-fighting equipment; and underground distribution branch cables for basement equipment rooms.

• Project Requirements: Long installation distance; strict budget control; underground installation in standard soil; previous projects using pure aluminum YJLV22 cables frequently faced complaints regarding terminal overheating, necessitating a long-term, stable alloy cable solution.
• Solution Adopted: YJLHV22 150mm² and 185mm² rare-earth aluminum alloy armored power cables; total supply volume: 527,300 meters.
• Project Outcome: Successfully passed acceptance inspection by the local power supply bureau; no terminal overheating or abnormal line faults occurred after three years of grid operation; lifecycle maintenance costs were significantly reduced; and the project received high praise from both the electrical construction and supervision units.

• Project Requirements: Main feeder lines from transformers and outdoor direct-buried branch distribution lines; high cable volume with a tight budget; direct-burial installation requiring resistance to crushing forces from backfilled rocks; compliance with completion acceptance standards for residential electrical engineering.
• Solution Implemented: YJLHV22 main cables (95mm² and 120mm²) paired with smaller-cross-section YJLHV22 branch distribution cables; total supply volume of 583,900 meters.
• Project Outcomes: Successfully passed fire safety and electrical inspections prior to residential handover; stable power supply for residents; zero quality-related complaints post-handover; established a long-term partnership with the real estate developer for repeat business.

• GB/T 31840.1-2015 Power cables with extruded insulation for rated voltages of 0.6/1 kV – Part 1: Cables for rated voltage of 0.6/1 kV
• GB/T 12706.1-2020 Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um=1.2 kV) to 35 kV (Um=40.5 kV) – Part 1: Cables for rated voltages of 1 kV (Um=1.2 kV) and 3 kV (Um=3.6 kV)
• GB/T 18380 Test methods for bunched electric wires and cables under fire conditions
• GB/T 12666 Test methods for electric wires and cables under fire conditions

• CCC (China Compulsory Certification) for standard civil and industrial specification products
• CE certification (compliant 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 with each order batch: Factory inspection report, aluminum alloy creep performance test report, raw material traceability certificate, and dimensional & electrical performance inspection report
• IEC 60502 standard test documentation and local market tender registration/certification materials available upon request based on regional requirements

• Rigorous incoming material inspection to eliminate potential quality issues
  • All raw materials—such as AA8030 aluminum alloy rods, galvanized steel strips, and XLPE resin—are sourced from reputable, large-scale smelters and chemical enterprises that hold full qualifications. Prior to production, comprehensive inspections are conducted to verify alloy composition stability, creep resistance, steel strip thickness uniformity, and insulation formula consistency. We strictly prohibit the use of inferior recycled aluminum or substandard auxiliary materials, effectively preventing issues such as excessive conductor resistance, terminal loosening due to creep, armor deformation, sheath cracking, and insulation breakdown. This helps purchasers mitigate risks associated with non-compliant cables, including rework, rectification, and liability claims.
• Flexible customization services to meet specific project requirements
  • We offer customization options for conductor cross-sections and non-standard core counts, as well as structural enhancements such as flame-retardant, fire-resistant, low-smoke zero-halogen (LSZH), and anti-corrosion properties. Sheath colors, surface print content, and meter-marking methods can be tailored to meet client construction drawings and tender specifications. Sample reels are available for preliminary creep and electrical performance testing, enabling design institutes and engineering firms to validate the product prior to formal bidding.
• Factory-direct sales model to maximize project gross margins
  • Eliminates intermediary wholesale markups; offers negotiable unit prices for bulk orders from major power grid and real estate projects, while setting reasonable minimum order quantities to accommodate the purchasing 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 ampacity and line loss calculations, comparative analysis of alloy versus pure copper/aluminum solutions, product selection advice, optimization of direct-burial installation plans, and drafting of technical specifications for tenders.
  • Supplies official technical datasheets, cable dimension drawings, alloy creep test reports, and on-site installation guides for terminals 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.
  • Provides remote technical consultation to assist with installation and troubleshooting for overseas municipal and real estate construction projects.
• Export-standard packaging and comprehensive 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 sea and land transport of heavy armored cables. Complete 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 armored aluminum-core cables—YJLV22 (pure aluminum), which is prone to creep leading to joint overheating; YJLHV22 (rare-earth alloy), which offers creep resistance and is the preferred choice for long-term direct-buried power distribution; and YJLHV32 (steel-wire armored), suitable for installations subject to significant axial tension. Avoid model misapplication to prevent operational hazards.
• Compliance with bending radius requirements: Strict adherence to minimum bending radius specifications is mandatory during conduit threading, cornering, and trench laying; excessive bending can deform the steel-tape wrap structure, causing armor misalignment and compression-induced micro-cracks in the internal insulation layer.
• Single-core installation restrictions: It is strictly prohibited to route three single-core YJLHV22 cables through the same enclosed steel conduit for long-distance installation, in order to prevent circulating current losses and abnormal cable overheating.
• Direct Burial Specifications: When directly burying YJLHV22 cables, a bedding layer of fine sand must be laid beneath and above the cable, and warning bricks or warning tape must be placed over the cable; sharp gravel must not come into direct contact with the outer sheath to prevent puncture or damage.
• Terminal Connection Specifications: Specialized aluminum alloy terminals must be used during termination; anti-oxidation conductive paste must be applied to the conductor surface, and bolt tightening torque must be strictly controlled to mitigate creep deformation and the risk of long-term overheating; the use of standard pure aluminum terminals is strictly prohibited.
• Armour Layer Grounding Specifications: During termination, the steel tape armour layer must be reliably grounded at both ends of the cable; specialized armoured cable connectors must be used to ensure a continuous grounding path and prevent the accumulation of induced voltage on the armour layer.
• Storage Management Regulations: Finished cable reels must be stored in a dry, well-ventilated warehouse; prolonged exposure to rain and direct sunlight must be avoided to delay sheath aging and extend shelf life.
• Voltage Application Limits: This product is a low-voltage cable with a rated voltage of 0.6/1 kV; it must not be used in medium- or high-voltage transmission lines to prevent insulation breakdown caused by overvoltage.

If you are working on municipal, real estate, or industrial park projects and require a quote, technical specifications, alloy creep performance test data, confirmation of customized construction, or expert consultation on cable selection and direct-burial installation for YJLHV22 cables, please submit your requirements via the inquiry form on our website. Please be sure to specify the core configuration, conductor cross-sectional area, total order quantity, cable type (e.g., flame-retardant, fire-resistant, low-smoke zero-halogen, or anti-corrosion), 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 sincerely welcome the opportunity to establish long-term framework partnerships with global electrical contractors, power EPC contractors, electrical distributors, and architectural design institutes.