Steel Wire Armoured XLPE Power Cable for Subsea, Mine & Heavy Mechanical Underground Laying

• YJ: Low/Medium/High Voltage Cross-linked Polyethylene (XLPE) Insulation
• V: Extruded PVC Inner Sheath
• 32: Galvanized Round Steel Wire Armor + Black Anti-aging PVC Outer Sheath; Competitive Advantages of Steel Wire Armored Core Wire: Superior axial tensile strength, superior to YJV22 steel tape armor

Comprehensive Voltage Range Coverage: 0.6/1kV Low Voltage, 8.7/10kV, 8.7/15kV Medium Voltage, 26/35kV High Voltage

Customizable Core Wire Configuration: Single Core/Three Core, Conductor Cross-sectional Area 16mm²~630mm², using Grade 2 T2 oxygen-free copper compacted core wire

Grade 2 High Voltage Compact T2 Oxygen-Free Copper Conductor

High-density round stranded pure copper core wire, DC resistance strictly controlled below the standard upper limit. Low resistivity effectively suppresses voltage drop during long-distance vertical shaft, deep foundation, and underwater power transmission, maintaining stable continuous current carrying capacity even under heavy loads. High voltage reduction decreases the cable outer diameter, saving construction teams space in pipes and shafts. Utilizing 100% new oxygen-free copper raw materials, without any recycled copper, all production batches exhibit consistent conductivity.

Co-extruded Inner Semiconductor Shielding Layer

The uniformly extruded semiconductor layer bonds tightly to the copper core surface, eliminating tiny air gaps between the conductor and the cross-linked polyethylene (XLPE) insulation layer. This homogenizes the internal electric field and suppresses the risk of partial discharge under long-term continuous high-voltage operation, which is crucial for the medium- and high-voltage YJV32 model used in mining and tunnel environments.

Cross-linked Polyethylene (XLPE) Main Insulation Layer (Thickness Matched to Voltage Rating)

High-purity, low-dielectric-loss cross-linked polyethylene compound. Long-term allowable operating temperature 90℃; short-circuit instantaneous withstand temperature 250℃ (within 5 seconds), resisting instantaneous overcurrent impacts during power grid short-circuit faults. The insulation structure maintains stable electrical performance under alternating high voltage and large mechanical tensile forces, without cracking or delamination.

Outer Co-extruded Semiconductor Shielding Layer (Medium- and High-Voltage Models Only)

The outer semiconductor layer is attached to the outer edge of the insulation layer, forming a closed electric field buffer structure in conjunction with the copper strip metal shielding layer. This prevents localized electric field concentration caused by cable bending, stretching, and friction during vertical shaft traction and laying.

Continuously Wound Copper Tape Metal Shielding Layer (Medium and High Voltage Models Only)

Overlapping soft copper tape shielding layers completely cover each insulated core wire, conducting induced current and large short-circuit ground fault currents, isolating internal electromagnetic radiation, and preventing interference with parallel-laid mine monitoring, communication, and automatic control cables.

Seamless Extruded PVC Liner

An integrated PVC inner sheath wraps the insulated core wire assembly, separating the metal shielding layer from the steel wire armor layer, preventing groundwater, mine wastewater, soil salt ions, and acidic or alkaline substances from corroding the internal metal components and XLPE insulated core wires.

Galvanized Round Steel Wire Armored Core Wire (Difference from YJV22 Core Wire)

Multiple strands of high-strength galvanized round steel wire are evenly spirally wound, which is the competitive advantage of YJV32 core wire. The steel wire armor withstands axial tensile force and can resist long-distance vertical tension in mine shafts, deep foundation shafts, underwater pipelines crossing rivers, and long-slope tunnels. Uniform wire spacing control prevents scratches on the inner sheath during cable stretching and bending during installation; the galvanized surface prevents corrosion in humid mine and underwater environments.

UV-stabilized, corrosion-resistant black PVC outer sheath

The composite outer sheath is anti-aging, anti-ozone, antibacterial, and corrosion-resistant, using a reinforced waterproof formula. Suitable for direct underwater burial, deep vertical shafts, steep mountain tunnels, and laying in coastal salt spray industrial areas; it exhibits excellent resistance to mine wastewater, corrosive underground water, and long-term immersion aging.

• ZA/ZB/ZC-YJV32: Multi-level flame retardant type, suitable for underground integrated pipe corridors, chemical mines, and underground commercial complexes.
• WDZ-YJV32: Low-smoke halogen-free modified type, suitable for underground rail transit tunnels and underground hospital power supply circuits.
• Reinforced Saltwater Corrosion-Resistant Outer Sheath: Customized for offshore wind power supporting facilities, cross-river submarine buried pipelines, and coastal mining areas.
• Low-Temperature Resistant Special Sheath: Suitable for high-altitude open-pit mines and tunnel construction in cold regions.
• Mine Safety Enhanced Type: Meets the corrosion resistance and tensile strength standards for underground coal mine auxiliary power supplies.

Rated Operating Voltage: 0.6/1kV, 8.7/10kV, 8.7/15kV, 26/35kV Three-phase AC power system

Power frequency withstand voltage, lightning impulse voltage, and partial discharge performance all fully comply with GB/IEC standard thresholds, consistent with conventional YJV series cables of the same voltage rating.

Ultra-low dielectric loss design effectively reduces cable self-heating loss under 24-hour continuous heavy-load operation in mines and industrial parks.

Minimum Allowable Bending Radius: 15 times the cable's outer diameter

Rated Axial Tensile Load Capacity: The complete steel wire armor can withstand long-distance vertical traction loads, adapting to vertical laying depths of hundreds of meters without external traction protection tools; YJV22 steel tape armor cannot withstand large axial tensile forces and is prohibited for vertical shaft laying.

Static Compression Resistance: Passes heavy-load compression tests; the insulation layer shows no cracking or permanent deformation, resisting rock compression in mine roadways.

Laying Ambient Temperature: Standard model ≥ 0℃; Low-Temperature Customized Version Supports -20℃ Laying Without Preheating

Torsion Resistance: The steel wire spiral structure disperses torque during long-distance cable laying, preventing damage to the cable's internal structure.

Standard underwater/mine burial design service life: Over 40 years

Long-term water permeability resistance: Passes a 100-meter continuous vertical immersion aging test, suitable for laying in river crossings, lake bottoms, and water-rich underground mine tunnels

Chemical corrosion resistance: Resistant to long-term erosion from weakly acidic mine wastewater, soil chloride ions, and coastal salt spray

UV aging resistance: Supports long-term laying in semi-open tunnel entrances without sheath cracking or powdering.

The biggest difference between YJV32 and traditional YJV22 steel tape armored cables lies in their axial tensile strength. YJV22 only provides radial compression protection and cannot withstand vertical tension, while the galvanized round steel wire armor of YJV32 can bear the entire weight of the cable during installation in vertical shafts, deep wells, steep slope tunnels, and submarine pipelines. No additional steel wire traction protection devices are needed, simplifying the overall engineering design and reducing the auxiliary material procurement costs for design engineers. This characteristic makes YJV32 the only designated armored cable for vertical shaft and deep-well mining power supply projects.

The three-layer anti-corrosion system—inner PVC lining + galvanized steel wire armor + reinforced waterproof outer sheath—effectively isolates mine wastewater, river saltwater, coastal salt spray, and corrosive underground soil. For underground mining projects and offshore power projects that are constantly immersed in wastewater, YJV32 avoids the early metal armor corrosion failure and insulation aging defects common in ordinary armored cables, significantly reducing the cost of subsequent circuit maintenance and cable replacement for construction units.

The YJV32 series covers low, medium, and high voltages from 0.6/1kV to 26/35kV, with cross-sections ranging from 16 to 630mm², and single-core/three-core structures. It can simultaneously meet the needs of low-voltage power distribution on the mine surface, medium-voltage trunk lines in underground tunnels, and high-voltage incoming lines to mine central substations. EPC contractors only need to select one supplier to complete the procurement of all armored cables for the entire mine or cross-river/submarine pipeline project, simplifying procurement classification, incoming material inspection, and on-site warehousing management.

The three-core YJV32 uses a flexible, non-hygroscopic filler for overall arc forming, with a smooth outer sheath surface and a low coefficient of friction during pipeline traction. In long-distance pipeline crossings across rivers and tunnel construction in mountainous areas, the traction resistance is significantly lower than that of irregularly filled armored cables, reducing the need for traction equipment and shortening the overall cabling construction cycle.

The YJV32 dedicated steel wire armored intelligent production line employs real-time online monitoring technology to precisely control the wire winding density, insulation layer thickness, and armor tightness. The tensile strength and winding overlap rate of each batch of steel wire are strictly controlled within standard tolerances, preventing insufficient tensile load-bearing capacity of individual cable reels and thus eliminating potential safety hazards in vertical deep well and underwater laying projects.

• Mining Engineering: Power supply cables for coal/metal mines, medium-voltage trunk lines in underground tunnels, buried power lines on steep slopes in open-pit mines, heavy-duty distribution cables for mine pumps
• Water Conservancy and Marine Infrastructure: Buried power cables across rivers/lakes, onshore support lines for coastal wind farms, power supply cables for dock shafts, power supply cables for deep pumping stations in reservoirs
• Tunnel and Underground Transportation Engineering: Power supply trunk lines for long-slope highway tunnels in mountainous areas, auxiliary power supply cables for deep wells in urban subways, long-distance vertical laying lines for underground integrated pipe corridors in mountainous areas
• Professional Heavy Industry Engineering: Buried cables for deep foundation construction, power supply for vertical shaft workshops in high-altitude heavy industry, underground corrosion-resistant distribution lines for chemical and mining applications

Case 1: 10kV Main Power Supply Project for Underground Metal Mine Shafts

A large non-ferrous metal mine underwent a vertical shaft power grid renovation, selecting YJV32 8.7/10kV three-core steel wire armored cables for deep shaft installation, reaching a vertical depth of 320 meters. The mine roadway environment presented risks from sulfur-containing wastewater and sharp rock compression. The steel wire armored cables utilized their own weight, eliminating the need for auxiliary traction and fixing structures; the three-layer anti-corrosion structure could withstand long-term immersion in mine wastewater. The complete mine safety certification documents provided by our factory passed the mine safety supervision bureau's acceptance inspection on the first attempt. After four years of continuous underground operation, no faults such as armor rusting or insulation layer tensile cracking occurred, and the maintenance frequency of the underground lines decreased by 82%.

Case Study 2: Submarine Buried Power Cable Project for Cross-River Pumping Stations

A municipal river improvement project involved laying submarine buried power cables for two riverbed pumping stations. Salt-resistant modified YJV32 0.6/1kV three-core cables were used for the cross-river pipeline. The river water contained chloride salts, and the water level fluctuated seasonally, resulting in the cables being submerged for extended periods. Reinforced waterproof outer sheaths and galvanized steel wire armor effectively prevented metal corrosion and sheath leakage failure. Complete CE and river engineering filing documents expedited the project progress and handover process for the water conservancy EPC contractor, ensuring the stable operation of the pumping station drainage equipment throughout the year.

Case Study 3: Medium-Voltage Trunk Line Laying Project for an Extra-Long Mountain Highway Tunnel

A 12-kilometer mountain highway tunnel power distribution project specified the use of ZC flame-retardant YJV32 8.7/15kV three-core cables for buried lines in long-distance steep-slope tunnels, with a maximum laying slope of 38 degrees. Ordinary YJV22 steel-tape armored cables could not withstand the downward sliding tension during laying, while YJV32 steel-wire armored cables effectively dispersed the slope tension without causing damage to the internal structure. The flame-retardant modification met tunnel fire protection design standards; the stable current-carrying capacity of a uniform batch ensured uninterrupted power supply to tunnel ventilation, lighting, and monitoring equipment, reducing annual maintenance labor costs for the tunnel lines by more than 75%.

Priority of Tensile Force Calculation: For vertical shafts, deep wells, steep slopes, and underwater laying scenarios, the cable's self-weight and laying traction force must be calculated in advance to confirm the compatibility of the YJV32 steel wire armor specification; it is strictly prohibited to use YJV22 steel tape armored cables to replace YJV32 in long-distance vertical laying to avoid the risk of armor tearing and cable damage. For laying depths exceeding 500 meters, please submit the project depth, cable length, and load parameters to our technical team for free tensile force and bearing capacity verification calculations.

Voltage and Cross-Section Matching Logic: Select the appropriate voltage level (low/medium/high voltage) based on the power distribution system voltage; match the copper core cross-section based on transformer capacity, transmission distance, and peak load current; calculate the voltage drop for long-distance underwater laying to avoid voltage deviation exceeding allowable limits.

Environmental Customization Matching: Standard YJV32 is suitable for ordinary dry tunnels in neutral soil; saltwater resistant and corrosion-resistant type is suitable for river crossings and coastal projects; flame-retardant/low-smoke halogen-free type is suitable for enclosed traffic tunnels and underground utility tunnels; low-temperature resistant type is suitable for high-altitude mining construction.

Mandatory Shielding Confirmation: Medium and high voltage YJV32 cables used in underground mines and utility tunnels must retain a complete copper strip metal shielding layer to suppress electromagnetic interference to adjacent monitoring and communication cables.

Ambient Temperature Limits: Standard cable laying ambient temperature ≥ 0℃; low-temperature modified sheaths must be used for low-temperature construction to prevent brittle cracking of the outer sheath during long-distance traction and stretching.

Bending radius control standards: The bending radius of all turns, pipe runs, and equipment terminal connections must be at least 15 times the outer diameter of the cable; excessive sharp bends are strictly prohibited to prevent the steel wire armor from squeezing and scratching the inner lining and insulation layer.

Vertical Shaft Anchoring Requirements: Dedicated cable anchoring devices should be installed at the top and bottom of the vertical shaft to distribute some of the tension and prevent fatigue damage to the steel wire armor from long-term single-point tension. Sufficient cable length should be reserved at the distribution cabinet and pump station terminals for future maintenance and replacement.

Underwater and Highway Crossing Protection Measures: For submarine pipelines crossing rivers, dedicated waterproof cable sealing kits should be used to seal both ends of the cable to prevent river water seepage. For highway laying under tunnels, a concrete protective layer should be laid above the cable layer to prevent vehicle crushing.

Multiple Cable Parallel Laying Heat Dissipation Rules: Sufficient heat dissipation gaps should be reserved between parallel YJV32 cables to prevent heat accumulation leading to a decrease in actual current carrying capacity. Isolation baffles should be installed in the tunnel cable trench to separate high-voltage/medium-voltage/low-voltage cable areas.

Before acceptance, verify the batch factory inspection certificate, third-party full-type test report, mine safety certificate, and copper raw material qualification.

After the cable laying and terminal production are completed, insulation resistance test, power frequency withstand voltage test and partial discharge detection are performed.

Conduct continuity testing of the wire mesh armor to ensure the integrity of the metal tensile protection circuit.

Complete reliable grounding connections for the wire mesh armor and copper strip shielding layer, and test the grounding resistance to ensure compliance with safety operation standards for mining, water conservancy, and tunnel power grids.

Each delivery includes a complete set of officially certified materials stamped by the factory, at no additional cost: National full-type test report, IEC certificate of conformity, CE certification, mine safety inspection certificate, copper raw material certificate of origin, batch production inspection records, and a dedicated YJV32 tensile laying and underwater construction guide. The documents fully meet the requirements for mine safety supervision filing, water conservancy project review, tunnel fire protection acceptance, and overseas EPC customs clearance, avoiding project delays due to incomplete special certification materials.

Our professional YJV32 tensile cable technical team provides free consultation services throughout the entire process: shaft tensile load calculation, long-distance underwater voltage drop simulation, voltage level and cross-section matching suggestions, corrosion/flame retardant grade selection, and optimization of overall tunnel/river crossing laying schemes. For large-scale mining, water conservancy, and offshore bulk orders, engineers provide remote video on-site construction guidance, promptly helping construction teams solve technical problems such as shaft traction, underwater cable sealing, and acceptance.

We have established long-term exclusive supply partnerships with top-tier T2 oxygen-free copper smelters and high-strength galvanized steel wire manufacturers, completely eliminating the use of recycled copper and low-strength inferior steel wire. Each batch of products undergoes comprehensive tensile and high-voltage laboratory testing before delivery; during production, the wire winding density, insulation layer thickness, and armor winding tightness are monitored online in real time to ensure the stable tensile load-bearing capacity and electrical performance of all cable reels, eliminating the risk of tensile failure in special vertical and underwater projects.

A dedicated automated YJV32 production workshop maintains ample inventory of mainstream low-voltage/medium-voltage standard specifications, enabling immediate shipment. For key mining, water conservancy, and tunnel EPC projects, priority is given to customizing the production schedule of salt-resistant, flame-retardant, low-smoke halogen-free, and low-temperature modified YJV32 cables to perfectly match project construction schedules.

Each reel of cable is marked with a unique batch number, production date, voltage rating, and core wire specifications, enabling full traceability from raw material supply to finished product delivery. Large-scale orders for mining, water conservancy, and offshore projects enjoy extended factory quality guarantees. If, during the warranty period, non-human-caused defects in the tensile armor, insulation, and sheath (caused by manufacturing process issues) occur, we will provide free replacement and replenishment services to mitigate the risk of significant power outages for special project purchasers.