Anti-Crush Direct Buried Distribution Cable Compliant with IEC & GB for Substation Incoming Line, Highway Crossing & Industrial Landfill Engineering Bulk Procurement

YJLHV22 is a buried-specific armored derivative of the YJHLV series aluminum alloy cables. Designed according to GB/T12706 and harmonized IEC design standards, it employs a five-layer composite structure: AA8000 heat-treated aluminum alloy conductor, cross-linked polyethylene insulation layer, inner buffer layer, double-layer steel tape armor, and weather-resistant outer sheath. Unlike unarmored aluminum alloy cables and traditional YJV22 copper armored cables, its built-in steel tape armor is designed to resist external mechanical compression, sharp object puncture, and rodent bites in fully buried environments, including crossing roads, unprotected open ditches, and chemically contaminated soil. This product is widely used by power design institutes, municipal procurement departments, industrial park general contractors, and overseas electrical importers. Our R&D team supports customized sheath modifications, armor thickness adjustments, and non-standard core material layouts based on customers' as-built drawings. All finished units undergo complete factory performance testing to meet the requirements of international tender document review and customs clearance procedures.

Rated Operating Voltage: Standard 0.6/1kV low-voltage specification; medium-voltage version can be customized according to the auxiliary power connection requirements of small substations.

Conductor Configuration: Standard AA8000 creep-resistant aluminum alloy; high corrosion-resistant alloy cores can be customized according to the needs of saline-alkali landfills and coastal tidal areas, with cross-sectional area ranging from 25mm² to 500mm².

Core Combination: Single-core, three-core, 3+1-core, four-core, 4+1-core multi-core structures, matching three-phase power distribution designs for industrial main incoming lines and municipal branch networks.

Insulation Performance: XLPE insulation maintains an insulation resistance of over 1050MΩ·km at ambient temperature. Its stable conductivity effectively suppresses voltage drop in ultra-long buried trunk lines (over 300 meters) in large industrial clusters.

Double-Layer Steel Strip Protection: Overlapping steel strips form a closed mechanical barrier, effectively resisting the heavy pressure of backfill soil, accidental crushing by construction machinery, and rodent bites during direct burial. Compared to unarmored alloy cables, this significantly reduces post-construction maintenance costs.

Enhanced Alloy Structure Toughness: The fine-grained AA8000 conductor has superior bending performance compared to ordinary cast aluminum conductors, facilitating line adjustments at trench corners and conduit penetrations during on-site installation.

Buffer Layer Design: A PVC inner layer separates the XLPE insulation layer from the rigid steel strip, preventing minor displacement of the armor layer due to long-term ground settlement deformation of the buried pipeline, thus avoiding insulation wear.

Continuous Allowable Operating Temperature: Long-term rated operating temperature 90℃, transient short-circuit withstand temperature 250℃. Applicable ambient temperature range: -40℃～+75℃

Basic properties: Excellent moisture resistance, ozone aging resistance, and resistance to general soil corrosion; the high-density polyethylene (HDPE) outer sheath can replace the standard polyvinyl chloride (PVC) sheath, suitable for acid and alkali polluted industrial sites and coastal high-salt spray geological environments.

Optimized Overall Cost Control: Unit procurement cost is 35%~45% lower than that of copper core YJV22 armored cables of the same specifications, while operational reliability is superior to ordinary pure aluminum armored cables, achieving a balance between initial procurement cost and long-term operational stability for project owners.

Lightweight Construction Advantages: The total weight of the cable is approximately 50% of that of copper core armored cables of the same specifications, significantly reducing land transportation costs and on-site hoisting manpower consumption for large-scale centralized buried construction projects.

Inhibited Thermal Creep Characteristics: Metallurgically optimized AA8000 material effectively reduces conductor creep deformation under alternating loads and seasonal temperature changes, avoiding problems such as poor terminal contact and abnormal overheating failure after decades of underground fixed operation.

• Municipal Infrastructure Projects: Urban road expansion and underground trunk lines; overhead-to-underground power grid conversion in old urban areas; power cable laying for municipal roads and green belts.
• Substation Projects: Underground incoming lines between distribution transformers and low-voltage switchgear; interconnection cables between outdoor auxiliary equipment within the substation plant area.
• Heavy Industry and Chemical Industrial Parks: Corrosion-resistant underground trunk cables for power distribution lines around smelters, petrochemical production bases, and landfills.
• Large-Scale Civil Engineering Projects: Underground transmission pipelines for the overall power system of integrated commercial areas, logistics bonded warehouse clusters, and newly built university campuses.
• Special Topography Projects: Direct burial in saline-alkali land in coastal development zones; rural power grid renovation in high-altitude permafrost areas; fixed underground lines on the surface in mining areas.

All AA8000 alloy billets are sourced from large-scale smelters with complete qualifications and third-party material certifications. Each batch of incoming alloy undergoes sampling inspection for resistivity, creep resistance, and tensile testing before production. XLPE raw material granules use well-known brand crosslinking agents and are free of recycled plastics. Steel strips undergo rust-proof pickling treatment before packaging. All finished products undergo random inspection, including partial discharge, high voltage resistance, armor continuity, and dimensional tolerances; unqualified products are scrapped and never delivered.

Our in-house technical laboratory strictly adjusts the sheath formula, armor thickness, and non-standard cross-sections according to the customer's construction drawings, developing a customized YJLHV22 cable specifically designed for harsh geological conditions, resistant to low temperatures and chemical corrosion. Multiple packaging options are available based on the construction team's cutting habits, including export-grade wooden barrel packaging and industrial coil packaging, to minimize surplus cable and reduce hidden waste of project procurement funds.

We offer a complete set of ISO9001 quality certification, GB third-party testing reports, and IEC compliance documents, along with complete English versions. All certification documents can be directly used for overseas bidding qualification verification and destination customs clearance, significantly simplifying administrative processes for cross-border purchasers.

Cross-section Calculation Rules: Calculate the total design load current and actual buried laying length based on the distribution diagram, reserving a 14%~23% cross-section margin to compensate for the inherent voltage drop of alloy conductors. For main lines with a buried length exceeding 280 meters, select higher-specification conductors.

Environmentally Differentiated Selection: Select HDPE anti-corrosion sheaths for projects in coastal saline-alkali land and chemical waste landfills; use low-temperature reinforced outer sheaths for municipal renovation projects in cold regions.

Accessory Matching Recommendations: Configure dedicated aluminum alloy crimp terminals instead of standard copper terminals to avoid electrochemical corrosion at cabinet connection nodes.

Before backfilling, lay a fine sand pad at the bottom of the cable to prevent sharp stones from directly contacting the outer sheath and causing armor deformation. When laying cables at bends, adhere to the standard minimum bending radius to prevent damage to the inner structure. Buried cables should be kept away from long-term heat sources such as underground heating pipes to slow down sheath aging.

Stable Delivery Time: Two dedicated automated armored cable production lines and ample raw material inventory ensure that standard-specification products are shipped within 11-19 working days after receiving the deposit, avoiding project downtime due to material supply delays.

Factory Direct Sales Pricing Policy: No middlemen markups; tiered bulk discounts available for large EPC bidding orders, helping procurement personnel optimize total project costs and improve project profitability.

Professional Full-Cycle Technical Services: Our experienced in-house cable engineering team provides free pre-sales load calculations and specification matching consultations, as well as remote technical guidance during construction to resolve on-site installation issues.

Flexible cooperation models: Small-batch sample trial orders are acceptable for on-site performance verification before bulk bidding and procurement; long-term global distributors and engineering companies can sign annual fixed-price framework contracts to reduce cost risks caused by fluctuations in non-ferrous metal prices.