Steel Tape Armoured Medium Voltage XLPE Power Cable for Substation & Industrial Main Grid Transmission
Product Summary
Product Details
Steel tape armoured XLPE power cable
,Medium voltage substation power cable
,Industrial main grid transmission cable
Product Description
This YJV22 medium-voltage cable is manufactured entirely in accordance with the national standard GB/T 12706.3-2020 for medium-voltage power cables, fully complies with international standard IEC 60502-2, and meets European CE LVD and EMC directives, making it suitable for cross-border engineering export projects.
All finished cables have undergone comprehensive testing by a third-party type testing organization recognized by the national power industry regulatory authority. Test items include:
- partial discharge test
- power frequency withstand voltage test
- impulse lightning voltage test
- thermal cycling aging test
- mechanical impact crush test
- vertical flame spread test
- long-term immersion test
Each batch of goods comes with a complete set of officially stamped documents:
- type test report
- factory batch inspection certificate
- raw copper material inspection report
- CE certificate of conformity
- production traceability record
- installation technical manual
fully complying with the filing standards of power regulatory departments, construction supervision units, and overseas customs.
Model: YJV22 8.7/10kV
- YJ: Cross-linked polyethylene (XLPE) insulation
- V: PVC inner sheath
- 22: Double-layer galvanized steel tape armor + PVC outer sheath
- Rated Voltage: U0/U = 8.7/10kV, suitable for 10kV medium-voltage distribution networks
Class 2 round compacted stranded T2 copper core, cross-sectional area range 16mm²～630mm², customizable according to project requirements. The highly compact design reduces the conductor outer diameter, lowering the overall cable volume and trench construction costs. DC resistance is strictly controlled below the standard upper limit to suppress voltage drop in long-distance medium-voltage trunk lines.
The extruded, uniformly cross-linked semiconducting shielding layer is tightly attached to the copper core, eliminating the air gap between the conductor and the main insulation layer, uniformly distributing the electric field within the cable core, effectively suppressing partial discharge under long-term operating voltage, and providing core wire breakdown protection for medium-voltage circuits.
The insulation layer thickness is 8.7/10kV grade, using high-purity cross-linked polyethylene raw materials, exhibiting ultra-low dielectric loss. The long-term allowable operating temperature is 90℃; the short-circuit withstand temperature can reach 250℃ within 5 seconds. Insulation performance is stable under alternating high voltage and shows no aging breakdown under seasonal temperature cycling.
A co-extruded semi-conductive outer layer is attached to the surface of the insulation layer, forming a closed, uniform electric field buffer structure in conjunction with the metal shielding layer, preventing localized electric field concentration caused by bending or compression damage during construction.
A continuously wound soft copper tape shielding layer effectively conducts induced current and fault ground current in the medium-voltage power grid, limits external electromagnetic interference, and protects nearby control signal cables and low-current equipment. The shielding layer cross-section design meets the short-circuit ground current requirements of the 10kV power grid.
A seamless extruded PVC inner sheath wraps around the shielding layer, isolating the steel tape armor layer from the copper shielding layer and preventing corrosion of the metal shielding layer and insulation core by underground moisture, alkaline soil, and sewage.
Two overlapping layers of galvanized steel tape spirally wound provide strong radial compressive strength, resisting rock crushing, construction machinery impacts, and underground rodent bites. Uniformly controlled winding gaps prevent scratches on the insulation layer during cable bending installation.
An outer sheath made of PVC composite material, resistant to UV rays, acids and alkalis, and antibacterial corrosion. Suitable for direct burial, outdoor pipeline laying, and open-air cable channel installation; resists soil chemical corrosion, meeting the requirements for long-term underground laying.
- ZC-YJV22 / ZB-YJV22 / ZA-YJV22: Flame-retardant medium-voltage cable, suitable for chemical plants, underground pipe corridors, data center power stations.
- WDZ-YJV22: Low-smoke halogen-free modified sheath cable, suitable for high-density public buildings, hospitals, subway supporting power stations.
- Special Corrosion-Resistant Outer Sheath Type: Suitable for sewage treatment plants, coastal salt spray industrial parks.
3. Core Electrical, Mechanical, and Environmental Performance Indicators
4. Core Advantages of Differentiated Products
The integrated design of double-layer inner and outer semi-conductive shielding + continuous copper strip metal shielding solves the most common cause of medium-voltage cable failure: partial discharge breakdown. For substation outgoing lines and main medium-voltage trunk circuits in factories operating 24/7, this multi-layer shielding structure significantly reduces the risk of unplanned power outages and decreases the frequency of equipment maintenance for project owners and operation management teams. Compared with single-layer shielded medium-voltage cables, the failure rate is significantly reduced after long-term operation.
The double-layer steel strip armored structure can adapt to various harsh laying environments, including road crossings, mountain rock foundations, trenches at the bottom of heavy vehicle parking lots, and integrated underground utility tunnels. It avoids insulation damage caused by foundation settlement, accidental impacts from construction machinery, and friction from underground sharp rocks, which frequently occur in 10kV power grid renovation projects, thereby reducing the contractor's later maintenance and cable replacement investment.
High-purity cross-linked polyethylene insulation material has an extremely low dielectric loss tangent. In large industrial parks with dozens of transformers operating continuously, the cable itself generates less heat loss under full load, thereby improving the overall energy efficiency of the power grid. Electrical design engineers prioritize this model in energy-saving power grid renovation projects to meet national energy consumption assessment standards.
Supports any single-core/three-core structure, cross-sectional area 16-630mm², and various flame-retardant, low-smoke halogen-free, and corrosion-resistant modified versions. Designers do not need to adjust the overall power distribution layout due to the limitation of a single cable specification; a single supplier can meet all medium-voltage cable needs for an entire municipal or industrial project, simplifying overall procurement classification and warehousing management.
Fully automated continuous extrusion, stranding, shielding, and armoring production lines monitor the thickness of each cable layer in real time. The insulation thickness, copper shield overlap, and steel tape winding tightness of each batch are controlled within strict standard tolerances. All cable reels have standardized electrical parameters, eliminating the risk of localized overheating or uneven voltage distribution in parallel multi-circuit medium-voltage systems.
- Municipal Power Grid Engineering: Urban 10kV power grid upgrades and renovations, community substation incoming and outgoing cables, underground medium-voltage trunk lines for roads, power supply circuits for urban integrated utility tunnels
- Heavy Industrial Park Projects: Steel manufacturing plants, chemical industrial parks, surface power distribution in mining areas, connecting cables for large-scale new energy photovoltaic booster stations
- Commercial and Public Infrastructure: Dedicated substation power supply for hospitals, airport supporting power stations, subway auxiliary 10kV power distribution systems, medium-voltage trunk lines for large data centers
- Large Real Estate Complexes: Dedicated transformer incoming and outgoing cables for super high-rise buildings, centralized power supply for logistics parks, underground commercial city buried medium-voltage circuits
A municipal power bureau in a certain prefecture-level city carried out substation expansion and power grid renovation, selecting three-core YJV22 8.7/10kV series cables as the fully buried outgoing trunk lines. The construction area involved densely populated residential areas, road intersections, and riverbank ditches with high water content. Double-layer steel tape armor effectively prevented crushing damage caused by road traffic during construction; the complete set of national type test reports provided by our factory directly passed the power bureau's acceptance, requiring no additional testing. After four years of grid connection, no partial discharge faults occurred, greatly reducing the workload of power grid inspection and maintenance.
A large-scale ground-mounted photovoltaic power station used YJV22 10kV armored cables to connect the substation and the photovoltaic array combiner box. The project site was an open-air environment with strong ultraviolet radiation, and the local soil contained saline-alkali components. Featuring a corrosion-resistant and UV-resistant outer sheath and metal shielding structure, it effectively resists harsh outdoor weather and electromagnetic interference between multiple parallel medium-voltage circuits. The customized ZC flame-retardant version meets the fire protection design requirements of new energy power plants, and one-stop document supply expedites the grid connection approval process for EPC contractors.
A fine chemical manufacturing industrial park has constructed an independent medium-voltage power grid. All underground lines in the plant area use YJV22 type anti-corrosion modified armored cables. The underground soil contains residual weakly acidic chemical wastewater. The special anti-corrosion outer sheath avoids the common problems of premature sheath aging and metal shielding corrosion of old cables in the park. Uniform current carrying capacity and stable insulation performance ensure continuous power supply for chemical production equipment operating 24 hours a day. Compared with ordinary medium-voltage cables, the annual line maintenance cost is reduced by more than 80%.
- Load and Cross-section Matching: Pre-calculate the transformer's rated current and short-circuit grounding current to select matching copper core cross-sections and copper strip shielding areas. For transmission distances exceeding 500 meters, please submit the load parameters to my technical team for free voltage drop simulation calculations to avoid excessive voltage loss.
- Environmental type matching: The standard YJV22 type is suitable for ordinary urban soil; the corrosion-resistant customized type is suitable for chemical industry and coastal salt spray projects; the flame-retardant/low-smoke halogen-free type is suitable for densely populated public buildings and enclosed pipeline corridors.
- Shielding structure confirmation: All 10kV medium-voltage buried lines strictly adopt full copper tape metal shielding, and unshielded cables are not used to avoid electromagnetic interference to nearby monitoring and communication cables.
- Temperature Control: The ambient temperature for standard cable laying should not be lower than 0℃. If construction is carried out in a low-temperature environment, a low-temperature modified cable should be selected to prevent cracking of the outer sheath during bending and pulling.
- Bending Control: The bending radius for all turns, conduit insertions, and equipment connections should be ≥15 times the cable's outer diameter. Forced sharp bends are prohibited to avoid cracking of the inner insulation layer and the risk of hidden partial discharge.
- Multi-Circuit Parallel Laying: Sufficient heat dissipation gaps should be reserved between multiple parallel medium-voltage cables to avoid overheating and subsequent reduction in actual current carrying capacity. When laying cables in layers within cable trenches, isolation barriers should be used to separate medium-voltage and low-voltage cable areas.
- Road Crossing Protection: When cables cross under motor vehicle lanes, a reinforced concrete protective layer should be installed above the cable layer to withstand vehicle traffic. Sufficient cable slack should be reserved at both ends of the distribution cabinet and transformer terminals for subsequent joint maintenance.
- Verify batch inspection reports, third-party type test certificates, and original copper qualification certificates before acceptance.
- Complete power frequency withstand voltage tests and partial discharge tests after cable laying and terminal production.
- Test the insulation resistance values of each phase core wire to ensure the data meets the medium-voltage cable acceptance standards.
- Complete the grounding connection of the metal shielding layer and steel tape armor layer, and test the grounding resistance to ensure it meets power grid safety requirements.
Each order comes with a complete set of official certification documents stamped with the factory seal: National Power Industry Type Test Report, IEC Compliance Documents, CE Certification, Certificate of Origin for Copper Raw Materials, Batch Production Inspection Records, and Professional Installation Guidance Manual. These documents support acceptance by domestic power bureaus and overseas customs clearance, avoiding project construction delays due to incomplete certification materials.
Our in-house medium-voltage cable design team provides free pre-sales technical services: circuit voltage drop simulation, current carrying capacity calculation, specification matching recommendations, flame retardant rating selection, and laying scheme optimization. For large-scale EPC, municipal, and new energy bulk orders, engineers can provide remote video construction guidance and solve technical problems related to end-product production, laying, and acceptance on-site.
We have signed a long-term cooperative supply contract with a top-tier T2 oxygen-free copper smelter, completely prohibiting the use of recycled mixed copper materials. Each batch of products undergoes high-voltage laboratory sampling testing before shipment; during production, the insulation layer thickness, shielding layer overlap rate, and armor winding condition are monitored online in real time to ensure the stable electrical performance of all cable reels and avoid inconsistencies in parameters between batches.
Our automated medium-voltage cable production workshop maintains a stock of mainstream cross-section YJV22 8.7/10kV cables, ready for immediate shipment. For key government projects, new energy projects, and municipal projects, we prioritize the production of customized flame-retardant, low-smoke halogen-free, and corrosion-resistant modified cables to match the construction schedules of engineering contractors.
Each reel of cable is marked with a unique batch number, production date, specifications, and voltage rating, enabling full production traceability. Large-scale engineering orders enjoy long-term factory quality guarantees. During the warranty period, if insulation, shielding, or armor defects are caused by non-human-caused damage due to manufacturing process issues, we will provide free replacement and replenishment services to reduce the operational risks of our customers' projects.
8. Project Acceptance and Long-Term Operational Value Summary
The YJV22 8.7/10kV steel-tape armored medium-voltage cross-linked polyethylene cable is the standard product designated for 10kV urban and industrial power distribution networks worldwide. With its multi-layer shielded electric field balance design, fully mechanical armor protection, and long-life corrosion-resistant outer sheath, this cable is suitable for almost all underground medium-voltage laying environments, effectively reducing the overall project construction investment and subsequent operation and maintenance costs for owners and contractors.
Our factory focuses on the R&D, automated production, and full-standard certification testing of standardized medium-voltage cables. We are committed to providing stable, fully compliant, and cost-effective YJV22 series medium-voltage cables to global EPC contractors, power grid companies, and industrial park developers, supporting long-term and stable cooperation in various municipal, new energy, chemical, and commercial medium-voltage power projects.
