JKYJ Medium Voltage Fixed Laying Power Cable

JKYJ is a robust and durable medium-voltage stationary power cable designed for commercial, industrial, and utility power transmission and distribution systems worldwide. Featuring a multi-layered semi-conductive shield, high-purity cross-linked polyethylene insulation, and a durable outer sheath, this cable covers a full range of medium-voltage classes from 6kV to 35kV and is available in both copper and aluminum core configurations to meet diverse budget and project load requirements.

Unlike conventional low-voltage cables, JKYJ is designed to withstand long-term continuous operation, frequent load fluctuations, ambient temperature variations, and complex geological conditions. Its integrated extruded structure achieves a uniform electric field distribution, effectively reducing dielectric loss and maintaining stable insulation performance throughout its service life. This cable is fully compatible with a variety of installation methods, including cable trenches, direct burial, conduits, indoor cable trays, building basements, and tunnels.

JKYJ medium-voltage cables have earned widespread recognition from electrical engineers, purchasing managers, and EPC construction companies worldwide thanks to their environmentally friendly raw materials that meet international and national manufacturing standards, as well as their optional low-smoke halogen-free configurations. Combining reliable electrical performance, mechanical durability, and cost-effectiveness throughout its entire lifecycle, this cable has become the mainstream preferred solution for modern urban redevelopment, industrial expansion, and renewable energy power projects globally.

Complete Core Technical Specifications

Product Model:

JKYJ Medium Voltage Fixed Laying Power Cable

Rated Voltage Rating:

6kV, 8.7/10kV, 12/20kV, 26/35kV

Conductor Type:

High-purity annealed copper conductor/closely stranded aluminum conductor, Category 2 standard stranding

Conductor Cross-sectional Area:

16mm² – 630mm² (customizable)

Inner Layer:

Extruded semi-conductive shielding layer, uniform structure, optimized electric field

Insulation Material:

High-density cross-linked polyethylene (XLPE), with anti-aging and UV-resistant formulation

Outer Sheath:

PVC/PE/HDPE optional, corrosion-resistant, moisture-proof, weather-resistant

Continuous Permissible Operating Temperature:

Maximum 90℃, long-term stable operation

Short Circuit Heat Resistance Temperature:

250℃, 5-second short circuit duration

Minimum Laying Ambient Temperature:

-15℃, no preheating required

Permissible Bending Radius:

Single core ≥ 15 times cable outer diameter; Multi-core ≥ 12 times cable outer diameter

Standard:

IEC Compliant with 60502, GB/T 12706, ISO 14001 environmental standards and relevant power industry specifications.

Structural advantages:

Compact cylindrical molding, seamless shielding layer, integrated insulation extrusion, and stable overall structure.

Detailed Application Scenarios

• Municipal and urban medium-voltage power grid renovation, new regional distribution network construction, and suburban power capacity expansion projects
• Main power supply lines for large industrial parks, chemical plants, manufacturing plants, and industrial zones
• Internal medium-voltage grid-connected cabling for new energy projects such as photovoltaic power stations, wind farm bases, and energy storage power stations
• Concealed power laying for large commercial complexes, large hospitals, university campuses, airport terminals, and public infrastructure
• Internal power distribution systems for urban underground utility tunnels, highways, and railway tunnels
• Fixed power transmission in mining areas, petrochemical zones, coastal saline-alkali areas, and industrial environments with air pollution
• Power distribution systems for residential clusters, logistics parks, and large industrial warehouses
• Inter-regional interconnection medium-voltage lines in economic development zones and industrial clusters

Engineer and Procurement Core Selection and Installation Guidelines

• The appropriate voltage rating and conductor cross-sectional area should be strictly selected based on the actual load current, transmission distance, and allowable voltage drop to avoid long-term overload operation.
• For underground direct burial, graded sand mats and rigid protective plates should be installed to buffer the effects of external mechanical pressure and geological settlement.
• In coastal, humid, saline, and chemically corrosive areas, a high-density anti-corrosion outer sheath should be upgraded to enhance its long-term environmental adaptability.
• When multiple cables are laid in trenches or tunnels, sufficient heat dissipation spacing should be reserved, and layered laying should be carried out according to industry construction specifications.
• Cable cutting, intermediate joint fabrication, and termination must use matching professional accessories and standardized processes to maintain complete insulation performance.
• Reserve reasonable length allowances at both ends of the line and at critical nodes to facilitate subsequent line adjustments, maintenance, and project expansion.
• Avoid prolonged exposure to strong external compression, friction from sharp objects, and severe mechanical tension during transportation and laying.
• For enclosed spaces with high humidity, a low-smoke, halogen-free flame-retardant version is used to meet fire prevention and environmental protection design requirements.

Core Product Performance Advantages

• Electrical Stability

  The optimized semi-conductive shielding layer and cross-linked polyethylene (XLPE) insulation structure homogenize the internal electric field, effectively suppressing partial discharge, reducing dielectric loss, and maintaining stable power output under long-term rated voltage and load fluctuations.

• Superior Weather Resistance and Aging Resistance

  The customized XLPE formulation contains antioxidants and UV protectants, resisting atmospheric aging, temperature variations, and humid climate corrosion, maintaining stable performance in long-term outdoor and enclosed installation environments.

• Strong Mechanical Durability

  Tightly stranded conductors enhance structural toughness; one-piece extrusion molding results in a rounded and compact cable that resists bending deformation, external pressure, and tensile forces during construction and long-term operation.

• Low Life Cycle Operating Costs

  High-conductivity conductors minimize line transmission losses; premium raw materials extend the service life to 30 years, with low daily maintenance requirements, effectively controlling total project investment and operating costs.

• Flexible Specification Customization

  Supports customization of core wire quantity, conductor material, sheath type, outer diameter, packaging length, flame retardant rating, and environmental protection rating to meet the standards of different regions and the needs of personalized project designs.

• Environmentally Friendly and Fire-Resistant Performance

  The standard version uses a low-smoke, low-toxicity material formula; optional flame retardant and fire-resistant ratings comply with urban building and public facility fire protection design standards, making it suitable for green and low-carbon engineering construction.

Advantages of Choosing JKYJ Cables

• Factory direct sales: We possess a complete independent production line from raw material smelting, conductor stranding, insulation extrusion to finished cables, eliminating intermediaries and providing stable and competitive bulk purchase prices.
• Rigorous multi-round factory testing: This includes electrical performance testing, mechanical tensile and bending tests, aging durability testing, insulation strength testing, and sheath corrosion resistance testing; each batch of products comes with complete test reports and certification documents.
• Extensive experience in global export and overseas project cooperation; familiar with regional standards and specifications in Southeast Asia, Africa, the Middle East, Europe, and Latin America; able to provide complete customs clearance documents, factory certificates, and technical data sheets.
• A professional electrical engineering team provides one-stop free technical support, including model selection calculations, voltage drop simulation, laying scheme suggestions, and on-site construction standard reference guidance.
• Flexible production and delivery plans: Supporting small-batch trial orders, mixed container loading, and large-scale centralized production; production plans are arranged according to the buyer's project progress and delivery schedule.
• Standardized packaging and export-grade wooden barrel packaging effectively protect cables from compression damage and insulation abrasion during long-distance sea and land transportation.
• A long-term and stable quality control system, with three levels of control including raw material inspection, mid-process inspection, and finished product inspection, ensures that the performance and parameters of each batch of products meet the standards.