Cost-Effective MV Armored Cable for General Medium Voltage Trunk & Branch Circuits

Each structural layer has been optimized to match the operating characteristics of a 10kV medium-voltage system and the requirements of daily engineering installations:

• Copper Conductor (3 cores, 95mm²): Made of tightly stranded high-purity electrolytic copper, with a uniform structure and low resistivity. It maintains stable conductivity under rated load and occasional surge current, has good ductility for easy terminal processing, and strong resistance to thermal deformation.
• Conductor Semiconductor Shielding Layer: An extruded integrated semiconducting layer uniformly covers the conductor surface, homogenizing the electric field, suppressing local electric field concentration, and fundamentally reducing the risk of partial discharge.
• Cross-linked Polyethylene Insulation Layer: Made of high-density cross-linked polyethylene, the core insulation material for medium-voltage operation. It has high dielectric strength, low dielectric loss, and long-term heat aging resistance, ensuring insulation reliability under continuous 10kV operating voltage.
• Insulating semiconductive shielding layer: The co-extruded semiconductive layer is tightly bonded to the insulating layer and the metal shielding layer to form a continuous shielding system, avoiding insulation breakdown caused by electric field distortion.
• Copper Tape Metal Shielding Layer: Overlapping copper tape windings withstand fault currents and induced currents, providing effective electromagnetic shielding, ensuring reliable system grounding, and complying with medium-voltage power safety regulations.
• Inner Sheath: A flexible PVC layer that isolates the core wire assembly from the armor layer, reducing interlayer friction and preventing moisture and dust from penetrating the internal structure.
• Steel Tape Armor Layer: Double-layer hot-dip galvanized steel tape completely encases the cable core wires. It possesses excellent compressive strength, impact resistance, and tensile strength; the galvanizing treatment effectively prevents rusting in humid underground environments.
• Outer Sheath: Reinforced modified PVC compound, improving abrasion resistance, weather resistance, and resistance to mild chemical corrosion, protecting the entire cable from outdoor environmental and soil erosion.

Rated Voltage:

8.7/15kV (Uo/U), Applicable System: 10kV AC power grid, Maximum System Voltage Um = 17.5kV, Power Frequency: 50Hz

Conductor Continuous Allowable Operating Temperature:

≤ 90°C

Maximum Short-Circuit Withstand Temperature:

250°C, Duration ≤ 5 seconds

Core Wire and Cross-Section:

3 cores × 95mm²

Minimum Bending Radius:

Static Fixed Laying ≥ 15 × Cable Outer Diameter; Traction and Mobile Laying ≥ 20 × Cable Outer Diameter

Allowable Laying Ambient Temperature:

≥ 0°C

Operating Temperature Range:

-20°C ~ +70°C

Power frequency withstand voltage:

39kV, withstands for 15 minutes without breakdown

Lightning impulse withstand voltage:

112kV (peak), no flashover or breakdown

Partial discharge:

Far below national standard limits, stable for long-term medium-voltage operation

Waterproof performance:

Integral sealed structure, suitable for long-term laying in damp cable trenches and underground soil

Mechanical properties:

Resistant to soil compression, gravel friction, and external impact during construction and operation

Optional types:

Standard type, flame-retardant type available upon request

Implementation Standards

This product is manufactured and tested in strict accordance with the national standard GB/T 12706 for medium-voltage power cables, and conforms to the international standards IEC 60502 and IEC 60228. All test reports and qualification documents are applicable to the acceptance of domestic power grids, industrial and municipal engineering projects.

• 10kV branch lines originating from the main line, serving residential areas, commercial areas, and suburban communities.
• Outgoing lines from urban and rural prefabricated substations, ring main units, and small distribution substations.
• Main laying methods: direct burial, cable trenches, and integrated pipe tunnels; suitable for conventional urban soil and road backfill conditions.

• 10kV power distribution lines within the industrial park, connecting the main substation and the power distribution rooms of each workshop.
• Powering medium-power production equipment, auxiliary workshops, office areas, and supporting facilities in general manufacturing, food processing, light industry, and building materials plants.
• Capable of withstanding workshop vibration, dust, and normal humidity in industrial environments.

• Providing medium-voltage power lines for urban parks, scenic areas, regional pumping stations, traffic signal systems, and community service centers.
• Providing supporting power lines for municipal road renovation and pipeline projects.
• Meets the stringent document review and acceptance requirements of municipal engineering projects.

• Suitable for 10kV branch lines in high-rise residential communities, general office parks, and medium-sized commercial buildings.
• Powers building auxiliary equipment, centralized lighting, and secondary power distribution systems.
• Note: For fully enclosed high-fire-risk areas, flame-retardant upgraded products should be selected.

• Suitable for collection branch lines in small and medium-sized photovoltaic power stations and wind power supporting projects.
• Suitable for power supply lines for energy storage power stations and distributed power equipment, adaptable to long-term outdoor installation and temperature variations.

• Directly buried in ordinary gravelly soil, green belts, and roadside foundation layers.
• Short-distance crossings of roads, ditches, and pipeline corridors.
• Multi-layer laying in centralized cable trenches and conventional cable trays.

The 95mm² copper conductor has a moderate current carrying capacity, perfectly matching the load requirements of 10kV branches. Low resistivity results in low temperature rise during full-load operation, and the conductor structure remains stable under frequent load changes. This effectively avoids abnormal heating of branch lines, ensuring continuous and reliable power supply to the regional distribution network.

A complete three-layer shielding system, coupled with a high-purity cross-linked polyethylene (XLPE) insulation layer, optimizes the internal electric field distribution. Partial discharge values ​​are controlled at extremely low levels, which is crucial for preventing the gradual aging and failure of insulation materials during medium-voltage operation. This characteristic significantly extends the cable's service life and reduces the potential risks of long-term branch lines.

The copper strip metal shielding layer, in conjunction with the inner shielding layer, forms a complete electromagnetic protection system. It safely conducts fault currents and induced currents, reduces electromagnetic interference to nearby communication lines and precision equipment, and fully meets the grounding design specifications for 10kV power distribution systems.

Double-layer galvanized steel strip provides robust external protection against compression, impact, and friction. For cables laid along roads and green belts, it resists damage caused by construction excavation and geological subsidence. The galvanized layer maintains its rust-proof properties in damp soil, ensuring the armor's protective capabilities remain unchanged for decades.

The reinforced PVC outer sheath offers excellent weather resistance, aging resistance, and abrasion resistance. It operates stably under alternating hot and cold weather conditions, rain and snow, and can withstand weak acids and alkalis in common soils. It can adapt to most climates and geological conditions in different regions, and its performance does not degrade in traditionally complex environments.

Compared to large-section medium-voltage cables, the 3×95mm² model offers suitable rigidity and better flexibility. It is easier to bend and lay in narrow cable trenches, vertical ducts, and dense cable trays. It is compatible with all mainstream 10kV cable terminations, connectors, and accessories on the market, helping construction teams shorten wiring cycles.

While maintaining medium-voltage performance standards, the moderate cross-sectional size effectively controls material and procurement costs. Compared to large-section cables, its installation and transportation costs are lower, and its wide versatility reduces the difficulty of material matching and inventory management. For large branch line projects, it can effectively control total investment without sacrificing operational reliability.

Stable materials and structural design result in a lower overall failure rate. Copper conductor terminations are less prone to loose connections and localized overheating. Routine maintenance only requires periodic visual inspections and routine electrical tests, which significantly saves on subsequent operation and management manpower and financial investment.

• Voltage Limitation: This cable is only suitable for 8.7/15kV (10kV class) medium-voltage AC systems. To prevent insulation safety accidents, it is strictly prohibited for use at voltage levels of 20kV and above.
• Load Matching: 3×95mm² cables are preferred for 10kV medium-load branch lines and regional distribution lines. Current-carrying capacity and voltage drop should be strictly calculated based on transmission distance, number of parallel cables, and actual load.
• Laying Density Derating: When multiple cables are densely laid in cable trays or deeply buried in high-temperature soil, the allowable current should be appropriately reduced, and sufficient heat dissipation gaps should be reserved to avoid heat accumulation.
• Environmental Classification: For coastal salt spray areas, chemically corrosive workshops, and key fire prevention areas, corrosion-resistant or flame-retardant customized versions should be selected instead of standard products.

• Construction Temperature: When the ambient temperature is below 0℃, laying operations must be stopped to prevent brittle cracking and irreversible damage to the cross-linked polyethylene (XLPE) insulation layer and polyvinyl chloride (PVC) sheath.
• Bending Control: Strictly adhere to the specified minimum bending radius. Avoid sharp bends, twists, or excessive compression to prevent shielding displacement and insulation damage.
• Traction Control: Use professional medium-voltage cable pulling tools to maintain uniform traction during laying. Excessive traction can lead to conductor breakage, armor deformation, and interlayer separation.
• Direct Burial Standard: Lay a 100mm thick layer of fine sand above and below the cable, and cover it with concrete slabs or bricks to isolate it from sharp stones and hard objects.
• Terminal and Grounding Treatment: Use dedicated 10kV 95mm² copper terminals, and complete crimping, sealing, and stress relief treatment according to standard procedures. Ensure that both ends of the copper tape shielding layer and steel tape armor layer are reliably grounded according to power industry standards.

• Document Review: During the procurement process, check complete qualification certificates, factory routine test reports, type test reports, and partial discharge test reports to confirm that all documents comply with national medium-voltage cable standards.
• Visual Inspection: Inspect the cable surface for cracks, scratches, and unclear printing markings; verify the accuracy of the model, rated voltage, and conductor cross-sectional area.
• Sampling Inspection: For large orders and key projects, arrange for a third party to randomly sample and conduct power frequency withstand voltage, insulation resistance, and partial discharge tests according to acceptance standards.
• Storage Requirements: Wind the cables onto standard large reels and store them in a dry, ventilated, and cool warehouse. Keep away from open flames, chemical reagents, and standing water. Prolonged open-air storage and direct sunlight are prohibited.
• Inventory Arrangement: Deliver goods in batches according to the construction schedule. Avoid prolonged static storage to prevent sheath aging and cable structure deformation.

We use high-purity electrolytic copper and high-quality cross-linked polyethylene (XLPE) insulation. Equipped with automated production lines and online partial discharge monitoring equipment, we conduct multi-stage inspections throughout the entire production process, from raw material warehousing to finished products. Each roll of cable undergoes comprehensive electrical performance testing before delivery to ensure consistent quality across batches.

As a mainstream standard specification, 3×95mm² 8.7/15kV YJV22 cable always maintains ample inventory. We support spot supply for urgent orders and provide continuous large-volume supply for long-lead-time power grid and industrial projects, effectively avoiding material shortages and project delays.

We offer customized services based on project requirements, such as fixed-length cutting, special marking, flame retardant treatment, and corrosion protection. Meanwhile, we provide matching 10kV terminals, cable connectors, grounding components, and laying accessories, enabling one-stop procurement and simplifying supplier management.

Our medium-voltage engineering team provides free pre-sales load calculations, voltage drop analysis, and laying scheme optimization. During construction, we provide remote guidance and on-site technical support to the field team, resolving challenges related to cable laying, terminal production, and grounding installation.

All products are packaged in reinforced wooden rolls to prevent damage from compression and collisions during long-distance transportation. We develop specific delivery plans for large orders to ensure materials arrive at the project site on time.

We can provide a complete set of official documents, including qualification certificates, type test reports, routine test reports, and partial discharge test reports. All documents comply with the requirements for power grid, industrial, and municipal bidding, filing, and acceptance, significantly reducing the document preparation work for the purchaser.

We establish dedicated project files for large orders. Our after-sales team regularly tracks product operation status, responds efficiently to technical inquiries and product feedback, and provides comprehensive service support throughout the cable's entire lifespan.