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    11kv 185sqmm Medium Voltage XLPE Cable N2sxy, N2xs2y, N2xsey, Na2xsy and Na2xs2y

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    Medium voltage cable
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    2025-08-06 07:16:56
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Detailed Information on 11kv 185sqmm Medium Voltage XLPE Cable N2sxy, N2xs2y, N2xsey, Na2xsy and Na2xs2y

1. Product-Specific Information

1.1 Specification Parameters
The 11kv 185sqmm medium voltage XLPE cable series, encompassing models N2sxy, N2xs2y, N2xsey, Na2xsy, and Na2xs2y, is engineered to deliver reliable power transmission in medium-voltage networks. These cables are characterized by precise specifications that balance performance, safety, and adaptability to diverse operational environments.
At the core of their design is the 11kv rated voltage, which positions them perfectly for medium-voltage distribution systems. This voltage level is optimal for applications such as urban power grids, industrial parks, and large commercial complexes, where power is transmitted from substations to end-users or industrial equipment. The cables are designed to withstand transient overvoltages up to 26kv, ensuring stability during grid fluctuations or switching operations.
The 185sqmm conductor cross-sectional area is a key parameter, carefully selected to balance current-carrying capacity and practicality. Under standard operating conditions (ambient temperature of 30°C), a 185sqmm conductor can carry a continuous current of 200–250A. This range makes it suitable for powering small to medium-sized industrial production lines, commercial buildings with high-density loads (e.g., shopping malls, hotels), and residential neighborhoods with significant electricity demand. The conductor’s size avoids the inefficiencies of overly thick conductors, which would increase installation complexity and material costs, while still providing sufficient power reserves for future load growth.
XLPE insulation is a defining feature, contributing significantly to the cables’ performance. Cross-linked polyethylene (XLPE) is chosen for its exceptional dielectric properties, with an insulation resistance exceeding 1000 MΩ·km at 20°C, ensuring effective resistance to electrical breakdown at 11kv. The insulation thickness typically ranges from 3.0mm to 3.5mm, meeting international standards such as IEC 60502-2. XLPE’s thermal stability allows the cables to operate continuously at 90°C, with short-circuit tolerance up to 250°C for 5 seconds, enabling them to handle temporary overloads from motor startups or equipment malfunctions.
The model variations (N2sxy, N2xs2y, N2xsey, Na2xsy, Na2xs2y) reflect differences in structural design to suit specific environments:
  • N2sxy: Likely features a basic single-core design with a standard sheath, suitable for general-purpose indoor or protected outdoor installations.

  • N2xs2y: May include an enhanced shielding layer or dual sheath, improving electromagnetic interference (EMI) resistance, ideal for areas with high electrical noise (e.g., near transformers or industrial machinery).

  • N2xsey: Possibly incorporates a halogen-free low-smoke (HFLS) sheath, reducing toxic emissions in case of fire, making it suitable for enclosed spaces like hospitals or 地铁 (subways).

  • Na2xsy: Could feature aluminum reinforcement or armor, enhancing mechanical strength for direct burial or harsh environments.

  • Na2xs2y: May combine dual sheaths with aluminum armor, offering both EMI protection and ruggedness for industrial or underground applications.

Other critical parameters include a minimum bending radius of 12 times the outer diameter (typically 40–45mm), ensuring Flexibility during installation around corners or in tight spaces. The cables also exhibit low capacitance (approximately 250–300 pF/m) and inductance (0.5–0.6 μH/m), minimizing power loss and improving energy efficiency.
1.2 Unique Applications
The versatility of the 11kv 185sqmm XLPE Cable series stems from its model variations and performance characteristics, making it suitable for diverse scenarios:
  • Urban Distribution Networks: Models like N2sxy and N2xs2y are widely used in city power grids, where they connect substations to residential and commercial areas. The 185sqmm conductor efficiently handles the load of neighborhoods and small commercial districts, while the XLPE insulation ensures reliable performance in varying weather conditions. Their single-core design simplifies installation in underground ducts, reducing the need for large trenches.

  • Industrial Parks: Na2xsy and Na2xs2y, with their armored or reinforced structures, are ideal for industrial environments. They resist mechanical damage from heavy machinery, chemical spills, and vibration, powering production lines, warehouses, and manufacturing facilities. The 11kv rating allows them to connect to on-site transformers, distributing power to equipment like pumps, conveyors, and furnaces.

  • Commercial Complexes: N2xsey, with its HFLS sheath, is preferred in shopping malls, hotels, and office towers. In the event of a fire, it releases minimal smoke and toxic gases, aiding evacuation and reducing damage to sensitive electronics. The 185sqmm conductor supports HVAC systems, lighting, and backup generators, ensuring uninterrupted operation.

  • Transportation Hubs: Airports, railway stations, and 地铁 systems rely on N2xsey and N2xs2y for their fire safety and EMI resistance. These cables power lighting, signaling, and security systems, withstanding the high electrical noise from trains and communication equipment. Their rugged design resists damage from foot traffic and maintenance activities.

  • Renewable Energy Facilities: The cables are used in small to medium-sized solar farms or wind parks to transmit power from inverters to grid connection points. Models like N2sxy, with UV-resistant sheaths, withstand outdoor exposure, while their efficiency minimizes energy loss over distances up to 5km.

  • Healthcare and Public Buildings: Hospitals and schools utilize N2xsey for its fire safety features. The HFLS sheath ensures compliance with strict safety codes, protecting patients and occupants in case of a fire. The cables’ reliability is critical for life-support systems and emergency power backups.

1.3 Materials and Construction
The cables’ performance is built on high-quality materials and precise engineering, with each component serving a specific function:
  • Conductors: Made from high-purity electrolytic copper (99.95% purity) or aluminum alloy. Copper offers superior conductivity (58 MS/m) and is preferred for high-efficiency applications, while aluminum (37 MS/m) is lighter and cost-effective for long-distance installations. Conductors are stranded (class 2 stranding) to enhance flexibility, consisting of multiple thin wires twisted together to prevent breakage during bending.

  • XLPE Insulation: Produced by cross-linking polyethylene using either chemical (peroxide) or radiation curing. This process creates a three-dimensional molecular structure, improving thermal and Chemical Resistance. XLPE is resistant to moisture, acids, and oils, ensuring long-term performance in harsh environments.

  • Shielding: Depending on the model, shielding may include a semi-conductive layer (carbon-loaded XLPE) to control electric field distribution, reducing partial discharges. N2xs2y and Na2xs2y may add a copper tape or wire shield, further reducing EMI and providing a grounding path for fault currents.

  • Sheaths: Materials vary by model:

    • Standard sheaths (N2sxy) use polyvinyl chloride (PVC) for cost-effectiveness and durability.

    • HFLS sheaths (N2xsey) employ polyolefins with flame-retardant additives, meeting EN 60332-3-24 fire standards.

    • Armored sheaths (Na2xsy, Na2xs2y) combine PVC or HFLS layers with galvanized Steel Tape or aluminum armor, enhancing resistance to crushing and impact.

  • Fillers and Binders: In Multi-Core models (if applicable), non-hygroscopic fillers (e.g., polypropylene ropes) prevent water ingress, while polyester tape binders hold conductors together, ensuring structural integrity.

1.4 Manufacturing Process
Production of the 11kv 185sqmm XLPE cables adheres to strict quality controls, involving several key stages:
  1. Conductor Stranding: Copper or Aluminum Wires are drawn to 0.5–1.0mm diameter, then twisted in a stranding machine to form the 185sqmm conductor. Stranding ensures flexibility and uniform current distribution. The conductor is annealed to reduce hardness, improving workability.

  1. XLPE Insulation Extrusion: The Stranded Conductor is fed into an extrusion line where molten XLPE is applied. The insulation thickness is precisely controlled using laser gauges to ensure uniformity. After extrusion, the insulation is cross-linked in a curing tube (chemical method) or via electron beam radiation, stabilizing its molecular structure.

  1. Shielding Application: For models requiring shielding, a semi-conductive tape or extruded layer is applied over the insulation. Copper tape or wires are helically wrapped for additional EMI protection, with tension controls ensuring consistent coverage.

  1. Sheath Extrusion: The cable core (Insulated Conductor + shielding) is passed through another extrusion line to apply the outer sheath. PVC, HFLS polyolefin, or armored materials are melted and formed around the core, with cooling tanks solidifying the sheath.

  1. Testing: Each cable undergoes rigorous testing, including:

    • Electrical Tests: AC voltage withstand (22kv for 5 minutes) to check insulation integrity; partial discharge measurement (<10 pC at 1.73U0) to detect defects.

    • Mechanical Tests: Tensile strength and elongation of sheaths; impact and crush resistance for armored models.

    • Environmental Tests: Heat aging (135°C for 168 hours) to verify thermal stability; water immersion to check moisture resistance.

2. General Product Information

2.1 Packaging
The cables are packaged to protect against damage during storage and transportation:
  • Reels: For lengths of 500m or 1000m, cables are wound onto wooden or steel reels. Wooden reels are cost-effective for domestic shipments, while steel reels offer durability for international transport. Reels feature flanges (1.2–1.5m diameter) to prevent slipping and are fitted with steel hubs for lifting via cranes or forklifts. Cable ends are sealed with moisture-resistant caps to prevent water or debris ingress.

  • Coils: Short lengths (50m, 100m) are coiled and wrapped in UV-resistant polyethylene film, secured with polypropylene straps. This packaging is lightweight, facilitating manual handling for small-scale installations.

  • Labeling: Each reel or coil is labeled with the model, voltage rating, conductor size, length, batch number, manufacturing date, and compliance certifications (e.g., "IEC 60502-2 Approved"). Handling instructions ("Store in Dry Conditions," "Do Not Drop") ensure proper care.

  • Palletization: Bulk orders are palletized using wooden pallets, shrink-wrapped to protect against dust and moisture. Pallets are labeled with total weight (500–1000kg) and unit count for easy inventory management.

2.2 Transportation
Transportation procedures are designed to maintain cable integrity:
  • Loading and Securing: Reels are loaded horizontally onto trucks or containers, secured with steel chains to prevent movement. Wooden blocks between reels avoid friction damage. Coils are stacked vertically with separators to prevent crushing.

  • Temperature Control: Cables are transported in covered vehicles to avoid extreme temperatures. In hot climates (>40°C), ventilation or cooling systems prevent sheath softening; in cold climates (<-20°C), insulation is protected from brittleness by avoiding rapid temperature changes.

  • Handling Equipment: Only certified machinery (forklifts with reel handlers, cranes) is used to move reels. Operators are trained to avoid dropping or tilting, which could damage conductors or insulation.

  • Documentation: Shipping documents include a packing list, certificate of conformity, material safety data sheet (MSDS), and customs declarations for international shipments, ensuring compliance with import regulations.

2.3 Shipping and Delivery
The series is available through flexible shipping options:
  • Domestic Shipping: Delivered via road transport, with delivery times of 2–7 business days depending on distance. Express services (1–2 days) are available for urgent orders, using couriers like DHL or local logistics providers.

  • International Shipping: Offered via sea freight (2–6 weeks) or air freight (3–7 days). Sea freight is cost-effective for full container loads, while air freight suits small orders or time-sensitive projects. Cables are shipped from major ports (e.g., Shanghai, Rotterdam) with door-to-door or port-to-port options.

  • Delivery Terms: Customers can choose Incoterms such as EXW (Ex Works), FOB (Free On Board), or DDP (Delivered Duty Paid). DDP includes all costs (transport, insurance, customs) for hassle-free delivery.

  • Tracking: Customers receive a tracking number to monitor shipments via an online portal, with notifications for departure, arrival, and delivery.

2.4 Samples
Samples are available to facilitate customer evaluation:
  • Sample Specifications: 1–5m lengths of each model, allowing testing of insulation thickness, conductor quality, and sheath properties. Custom samples (e.g., with terminations) can be provided upon request.

  • Cost and Lead Time: Free for qualified customers (utility companies, industrial buyers), with shipping costs covered by the customer. A nominal fee (€50–€200) applies to small inquiries, refundable on bulk orders. Samples are shipped within 3–5 business days.

  • Testing Support: Accompanied by test reports (insulation resistance, conductor resistance, flame retardancy). Third-party laboratory certifications (e.g., UL, CE) can be arranged at a discounted rate.

2.5 After-Sales Service
Comprehensive support ensures long-term performance:
  • Warranty: 15-year coverage for material and workmanship defects, valid for installations by certified electricians following guidelines. Excludes damage from misuse or natural disasters.

  • Technical Assistance: A team of engineers provides guidance via phone, email, or video calls, offering installation advice, troubleshooting, and termination recommendations. Responses are guaranteed within 24 hours.

  • Repairs and Replacements: For warranty claims, technicians inspect defects; replacements or repairs are provided at no cost. Out-of-warranty services are available at competitive rates.

  • Training: On-site or online training for installers covers handling, termination, and maintenance, ensuring correct usage and maximizing cable lifespan.

  • Feedback: Customer input is used to improve models, with regular updates to meet evolving industry standards (e.g., enhanced fire resistance, eco-friendly materials).

In summary, the 11kv 185sqmm XLPE cable series (N2sxy, N2xs2y, N2xsey, Na2xsy, Na2xs2y) combines robust design, material quality, and versatile models to meet diverse medium-voltage transmission needs. Supported by reliable packaging, shipping, and after-sales services, these cables deliver safety, efficiency, and durability across urban, industrial, and public infrastructure applications.
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E-mail:export@qlcables.com

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Tel/whatsapp:+86-18032066271

ADD:Xiaokou Industrial Development Zone, Ningjin County, Xingtai City,Hebei Province, China

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