6/10kV YJV22 Copper Conductor XLPE Insulated Steel Tape Armoured Underground Substation Feeder & Grid Interconnection Cable

The 6/10kV YJV22 is a medium-voltage, steel-tape armored power cable widely used in fixed, high-capacity power transmission and distribution networks. Featuring a reinforced design, the cable incorporates a compacted high-purity electrolytic copper conductor, a thickened cross-linked polyethylene (XLPE) insulation layer, an inner bedding layer, double-layer overlapping galvanized steel-tape armor, and a weather-resistant PVC outer sheath. This construction enables it to withstand the high electric field stresses associated with 10kV-class operating voltages while providing superior mechanical protection for underground installations.

Unlike its low-voltage counterpart, this medium-voltage model utilizes a thicker, precision-controlled XLPE insulation layer designed to suppress partial discharge and resist the effects of electrical treeing during long-term high-voltage operation. Its integrated double-layer steel-tape armor allows for direct burial without the need for additional protective conduits, thereby reducing construction costs. These features make it the preferred choice for substation outgoing feeders, grid interconnections, large-scale renewable energy collection systems, and high-voltage distribution within heavy industrial facilities. With its combined advantages of long-term insulation reliability, mechanical durability, and cost-effectiveness, the 6/10kV YJV22 cable has gained widespread recognition and standardized adoption among power design institutes, utility companies, and international EPC contractors, making it an ideal choice for global medium-voltage infrastructure investments.

features high dielectric strength and exhibits superior resistance to partial discharge, electrical treeing, and thermal aging under continuous high electric field stress.

serves to prevent mechanical abrasion and electrochemical corrosion between the steel tape armor and the internal insulated core assembly.

provides a specialized mechanical protective barrier against soil pressure, excavation impact, rock puncture, and rodent damage for direct-buried medium-voltage lines.

suitable for U0/U = 6/10kV AC systems and 10kV nominal three-phase distribution networks.

• GB/T 12706.1–4:2020 – National standards for extruded insulation power cables with rated voltages from 0.6/1 kV to 26/35 kV
• IEC 60502-1 & IEC 60502-2 – International specifications for extruded insulation power cables (medium voltage)
• IEC 60228 – Standard classification for Class 2 compacted stranded copper conductor construction
• GB/T 19666 – Flame-retardant grade standards (customizable flame-retardant modifications—ZA, ZB, ZC—for 6/10 kV YJV22 cables)

Comprehensive certification documentation: ISO9001 Quality Management System certification, CCC mandatory certification, CE certification, CB certification, full-item type test reports, partial discharge test records, raw material inspection documents, and third-party independent test certificates; fully compliant with requirements for international tendering, technical reviews, and project completion acceptance audits.

The tight compaction and stranding process enhances conductor roundness and density, thereby reducing DC resistance and power loss during high-load medium-voltage power transmission. The copper conductor exhibits negligible creep under long-term terminal compression, ensuring stable contact resistance at joints and terminations throughout a 30-year service life and completely eliminating the long-term overheating risks often associated with medium-voltage aluminum cables. The uniform and precise conductor surface ensures reliable and consistent crimping performance when connected to medium-voltage terminals and accessories.

The insulation thickness is precisely engineered to meet electric field strength requirements for the 6/10kV voltage class; real-time eccentricity monitoring and off-line partial discharge testing are employed during production to eliminate internal air gaps, voids, and impurities. A specially formulated XLPE material is used to effectively inhibit electrical treeing propagation, water treeing degradation, and insulation breakdown—issues often caused by prolonged burial in moist, acidic, or alkaline soils—thereby ensuring stable dielectric performance under cyclic load fluctuations and transient lightning surges.

This is a critical medium-voltage structural feature extruded between the conductor and the main insulation layer. Designed to homogenize the electric field distribution across the conductor surface and eliminate points of localized electric field concentration and partial discharge initiation, it is essential for meeting the insulation performance requirements of the 10kV class.

Fills the interstices between cable cores to maintain a symmetrical, circular geometry; alleviates internal shear stress during cable pulling, bending, and installation; prevents surface abrasion of the insulation layer; and retards moisture ingress in direct-burial and cable trench environments.

Forms a continuous physical barrier between the steel tape armor and the insulated core assembly; prevents sheath abrasion during installation; and inhibits electrochemical corrosion between the galvanized steel tape and internal metal or polymer components in chemically active soils.

Utilizes a double-layer overlapped steel tape wrapping structure designed to withstand the high burial loads typical of medium-voltage trunk lines; provides resistance against lateral soil pressure, accidental excavation impacts, sharp rock punctures, and rodent damage. This design enables direct-burial installation of medium-voltage feeders without the need for large-diameter protective conduits.

The outer sheath provides comprehensive external protection, resisting chemical corrosion from soil, UV radiation, ozone-induced aging, and moisture ingress. It is suitable for various installation methods—including outdoor laying, cable trenches, tunnels, and direct underground burial—ensuring the cable maintains its structural integrity throughout its designed service life.

U0/U: 6/10kV AC, 50Hz; suitable for 10kV nominal voltage three-phase medium-voltage distribution networks

16mm² to 630mm²; available in single-core and three-core configurations, covering applications ranging from short-distance branch feeders and medium-voltage distribution mains to heavy-load main grid interconnectors.

Single-core and three-core; core arrangement can be customized according to customer engineering drawings.

• Maximum permissible long-term operating temperature of conductor: 90°C
• Maximum permissible temperature during short-circuit (duration ≤ 5 seconds): 250°C
• Minimum permissible ambient temperature during installation: 0°C (standard formulation); a low-temperature version suitable for environments down to -20°C is also available.
• Design service life under compliant installation and normal operating conditions: ≥ 30 years

• Minimum bending radius for three-core 6/10kV YJV22: ≥ 15 times the cable outer diameter
• Minimum bending radius for single-core 6/10kV YJV22: ≥ 20 times the cable outer diameter

Structural Limitations: The armor layer can withstand radial pressure and impact loads but cannot withstand significant axial tensile force; this type of medium-voltage cable is not recommended for long-distance overhead tensioned installation.

The cable's continuous current-carrying capacity meets the requirements for medium-voltage feeder transmission. Its low-resistance copper conductors effectively control voltage drop and active power loss in medium-to-long-distance grid-connected layouts, thereby mitigating excessive voltage deviations caused by load fluctuations in industrial and renewable energy generation.

An integrated inner semi-conductive shielding layer ensures uniform electric field distribution, eliminating localized high-field-strength stresses that lead to partial discharge, electrical treeing, and premature insulation failure; the product fully complies with mandatory type-test requirements for 10kV cables regarding grid access and meets third-party design review and acceptance standards.

The 6/10kV YJV22 cable is widely recognized by global power design institutes, grid operators, and certification bodies. It features standardized current-carrying capacity ratings, partial discharge test thresholds, termination accessory selection guidelines, and installation specifications. These standards help shorten the cycles for drawing reviews, technical document submissions, and tender approvals, while also reducing the risk of design changes.

The integrated mechanical protection layer eliminates the need for large-diameter, heavy-duty protective conduits in direct-burial feeder designs. This reduces trench excavation depth and the volume of civil works—such as conduit procurement, installation, and backfilling—simplifies construction drawing layouts, and accelerates the overall implementation schedule for grid upgrades and renewable energy grid-connection projects.

Medium-voltage feeders are subject to high electrical stress over the long term; copper’s inherent creep resistance prevents issues suchs as terminal loosening and thermal runaway—common with aluminum cables—thereby significantly reducing the frequency of inspections, maintenance, and fault remediation required for critical grid transmission paths after commissioning.

Flame-retardant ratings (ZA, ZB, or ZC) can be customized to meet fire safety design requirements for power supply systems in underground utility tunnels, highway tunnels, basement medium-voltage switchgear rooms, and densely populated public facilities, facilitating smooth fire safety approval and project completion acceptance.

As a mainstream 6/10kV medium-voltage armored cable, this product benefits from continuous large-scale production, ensuring stable unit prices and reliable delivery schedules; unlike non-standard custom cables, it allows for precise budget locking during the tendering and quotation phases.

By eliminating the need to procure, transport, and install large-diameter conduits, the product lowers civil engineering costs within the total project investment, helping EPC contractors secure more competitive profit margins during the bidding stage.

Although the initial purchase cost is higher than that of equivalent YJLV22 aluminum-core medium-voltage cables, the rarity of joint aging and insulation failures significantly reduces costs associated with routine inspections, emergency repairs, and partial replacements over the asset's 30-year lifecycle, delivering exceptional overall economic value for permanent utility and industrial infrastructure projects.

The company maintains finished-goods inventory for frequently used 6/10kV YJV22 cable specifications (in both single-core and three-core configurations). This supports small-batch orders for pre-qualification samples, urgent project restocking, and rapid bulk shipments, thereby preventing construction delays caused by lengthy production lead times.

The matching medium-voltage cold-shrink and heat-shrink termination kits, cable joints, junction boxes, and sealing components adhere to universal dimensional standards. This eliminates the complexities associated with ordering custom accessories and streamlines workflows for project procurement teams regarding Bill of Materials (BOM) compilation, incoming quality inspections, and on-site warehouse management.

• Outgoing cables connecting 10kV distribution substation switchgear to outdoor pole-mounted transformers, pad-mounted transformers, and downstream distribution nodes
• Direct-buried medium-voltage backbone cables used in the renovation of existing urban 10kV grids, overhead-to-underground line conversions, and regional distribution network capacity expansion projects
• Collection and interconnection cables between pad-mounted transformers and central switch rooms in large-scale ground-mounted photovoltaic power plants and onshore wind farms
• Medium-voltage distribution wiring within the high-voltage power supply layouts of heavy manufacturing plants, mining facilities, chemical industrial parks, and large industrial complexes
• Medium-voltage power lines installed in urban road tunnels, underground utility tunnels, highway corridors, and bridge infrastructure where there is a risk of mechanical damage
• Grid interconnection cables suitable for centralized power supply in business parks, auxiliary medium-voltage distribution systems for large data centers, and critical backup power networks in hospitals.
• Medium-voltage branch distribution lines suitable for long-distance direct burial in rural electrification upgrades and suburban grid extension projects.

Replacement of aging 10kV overhead lines with direct-buried armored cables across 12 urban residential areas; the project required a large volume of cable and utilized a direct-burial installation method; products had to pass type tests by the local power supply bureau and meet grid acceptance standards, ensuring long-term stable operation within the public power grid.

Bulk supply of 6/10kV YJV22 three-core armored cables (in various cross-sectional sizes) totaling 21.7 kilometers in length.

The cable's integrated steel-tape armor structure eliminated the need for conduit installation, reducing overall civil construction costs by 29%; the integrated semi-conductive shielding structure successfully passed all partial discharge and dielectric performance tests required by the power authorities; post-installation performance was stable, leading the power department to designate the 6/10kV YJV22 cable as the standard direct-burial cable specification for all future urban overhead-to-underground conversion tenders.

Installation of buried interconnecting cables linking box-type substations to the central medium-voltage switchgear room; cables required to withstand soil pressure from farmland, rodent activity, and the risk of occasional excavation by agricultural machinery; strict requirements regarding grid-connection compliance and budget control.

Selection of three-core 6/10kV YJV22 cables with a total supply length of 13.9 km; specifications configured according to the capacity of each power generation unit.

Utilization of XLPE insulation and an inner shielding structure ensured low partial discharge levels during PV load fluctuations; the direct-burial design streamlined on-site installation, enabling the project to achieve grid connection ahead of schedule; four years of operational monitoring revealed no insulation or joint failures, fully satisfying the grid company's requirements for ongoing inspections.

Construction of a new medium-voltage main feeder line—routed through perimeter cable trenches and partially via direct-buried sections—to supply power to transformers serving high-capacity production equipment. The system required low transmission loss characteristics and sufficient load headroom to accommodate future production capacity expansion.

A combination of single-core and three-core 6/10kV YJV22 cables was utilized, with a total supply length of 7.4 kilometers.

The use of copper conductors effectively reduced energy consumption during full-load operation; standardized cable specifications simplified future circuit expansion and modification work; the armored structure provided effective protection against accidental cable damage during subsequent infrastructure upgrades; and the project successfully passed internal electrical safety audits as well as annual third-party power system inspections.

Before selecting 6/10kV YJV22 cables, conduct comprehensive analyses—including ampacity calculations, voltage drop assessments, short-circuit withstand capability verification, and partial discharge design reviews—based on transmission distance, system short-circuit capacity, and operating load parameters. Our technical team offers complimentary customized selection reports and technical comparison data to help avoid safety hazards caused by undersized specifications or economic waste resulting from oversized ones.

Installation must utilize compatible 10kV-class cold-shrink or heat-shrink termination kits. Strict adherence to installation procedures is mandatory during semi-conductive layer stripping, insulation layer trimming, and stress-control tube positioning to eliminate electric field distortion and the risk of partial discharge at the cable termination. The use of low-voltage termination accessories as substitutes is strictly prohibited.

The specified minimum bending radius limits must be strictly observed throughout the installation process; forced or sharp bending can cause wrinkling of the internal insulation layer, create air gaps, and trigger partial discharge, thereby compromising the long-term operational reliability of the medium-voltage cable. Protective liners and chamfered fittings should be installed at conduit entrances to prevent abrasion of the outer sheath.

Both ends of the double steel-tape armor layer must be reliably grounded in accordance with national and local electrical codes to suppress induced circulating currents and accumulated induced voltages within the metal armor, thereby eliminating potential electrical safety hazards during long-term underground operation.

The 6/10kV YJV22 cable is specifically designed for direct burial, cable trench, and tunnel installations; this model is not suitable for long-span overhead tension suspension (subject to significant axial tensile force) or vertical installations with large elevation differences. For applications requiring long-term submersion in water, the YJV32 cable with steel-wire armor should be selected.

Cable drums must be stored on level ground within a dry, well-ventilated warehouse, avoiding prolonged exposure to rain or direct, intense sunlight. During loading, unloading, and transportation, strict precautions must be taken to prevent violent impacts, crushing, or tipping of the drums; such incidents could damage the outer sheath or compromise the internal insulation structure, thereby impairing the medium-voltage cable's insulation performance.

All products are manufactured in strict accordance with GB/T 12706 and relevant IEC international standards. We supply—free of charge—complete factory qualification documents, detailed type test reports, partial discharge test records, third-party inspection certificates, and editable technical data sheets, fully satisfying requirements for document review, submission, and grid project acceptance across global tendering activities.

We utilize certified, high-purity electrolytic copper rods and medium-voltage grade XLPE materials. Key manufacturing processes—such as conductor stranding, extrusion of the inner semiconducting layer and main insulation, armoring, and outer sheathing—are equipped with in-line monitoring systems for dimensions and concentricity. This ensures consistent and stable DC resistance, insulation thickness, and partial discharge performance across production batches, thereby minimizing the risk of rejection during incoming material inspections for large-scale tender orders.

We offer customized production of 6/10kV YJV22 cables (available in single-core and three-core configurations) based on customer technical drawings and specific project specifications. Our services include flame-retardant modifications (ZA/ZB/ZC grades), upgrades to low-smoke, zero-halogen (LSZH) outer sheaths, fixed-length cutting, and specialized packaging on wooden or steel reels for export.

Our direct-manufacturing model eliminates intermediary markups. We support small-batch sample orders to meet early-stage project qualification requirements and offer priority production scheduling for large-volume orders. We maintain ready stock of standard specifications to ensure rapid dispatch for urgent project delivery needs.

Our team of expert cable design engineers provides complimentary services, including load calculations, ampacity verification, lifecycle cost comparisons (copper vs. aluminum), routing optimization consulting, remote installation guidance, and systematic post-sales quality tracking. We also provide formal, long-term product warranties, comprehensively addressing any technical or quality concerns procurement and engineering teams may have after order fulfillment.

We employ established export packaging standards, provide robust customs documentation support, and coordinate efficient global logistics. We have a proven track record of successful supply for grid upgrades, renewable energy grid integration, and industrial power infrastructure projects across Southeast Asia, Central Asia, Africa, the Middle East, and Latin America. Furthermore, we are well-versed in the regional inspection, acceptance, and compliance filing requirements for medium-voltage products in numerous overseas markets.

A1: The 6/10kV YJV22 cable incorporates an additional inner semi-conductive shielding layer designed to equalize the electric field distribution and control partial discharge; it also features a thickened cross-linked polyethylene (XLPE) insulation layer capable of withstanding 10kV-level electric field stress. In contrast, low-voltage YJV22 cables lack this shielding design and have thinner insulation, making them unsuitable for operation in medium-voltage power grids. Furthermore, medium-voltage cables must undergo partial discharge testing and third-party inspection during production, whereas low-voltage cables are not subject to these requirements.

A2: Direct burial is entirely feasible for this type of medium-voltage cable and represents the most economical installation method. Its double-layer overlapping steel tape armor effectively withstands soil pressure, construction impacts, rock punctures, and rodent damage, thereby eliminating the costs associated with purchasing large-diameter protective conduits and the associated excavation work. This installation method is widely adopted in global grid modernization and renewable energy grid-connection projects.

A3: The 6/10kV YJV22 utilizes high-conductivity copper conductors, offering advantages such as low transmission losses and excellent long-term terminal stability; it is ideally suited for permanent, critical medium-voltage feeders designed for a service life exceeding 30 years. In contrast, the 6/10kV YJLV22 employs aluminum conductors; while it offers a lower initial purchase cost, it entails higher line losses and a risk of gradual terminal deformation under sustained pressure, making it typically suitable for budget-constrained, secondary, or non-critical medium-voltage branch circuits. Customers can make an appropriate choice based on the circuit's importance, the project's service life, and the overall budget plan.

A4: We can provide manufacturing licenses, ISO9001 quality system certification, CCC, CE, and CB certifications, full type test reports (including partial discharge test reports), raw material incoming inspection records, third-party authoritative test certificates, and tender-specific technical parameter sheets customized to client requirements.

A5: Standard (non-flame-retardant) products available in stock can be shipped within 3 to 7 working days; the production lead time for customized flame-retardant products (ZA/ZB/ZC grades) is approximately 10 to 20 working days. For EPC medium-voltage project orders with tight schedules, priority production can be arranged upon negotiation to ensure the project timeline remains unaffected.

A6: Improper stripping of the semi-conductive shielding layer, substandard trimming of the insulation, or incorrect positioning of the stress control tube can lead to localized electric field concentration at the cable termination. This, in turn, triggers partial discharge, degrades insulation performance, and causes premature cable failure. Using original-manufacturer 10kV termination kits and adhering to standardized installation procedures eliminates these risks, ensuring the cable maintains the required insulation performance throughout its designed service life.