Nyy N2xy Cable 1*300 Copper Conductor Power Cable Cu/XLPE/PVC Cable

Material: High-purity electrolytic copper with a minimum purity of 99.95%, ensuring superior electrical conductivity (≥58 MS/m at 20°C). This high purity minimizes energy loss, critical for efficient transmission in high-current scenarios.

Stranding Configuration: Class 2 stranding (per IEC 60228) consisting of 133 strands of 1.7mm diameter Copper Wire, twisted in multiple layers to enhance Flexibility. The stranding design reduces conductor rigidity, allowing the cable to be bent and routed in confined spaces, such as underground ducts or industrial plant corridors.

Cross-Sectional Area: Precisely controlled at 300mm², providing a large conductive path to handle high currents.

DC Resistance: ≤0.062 Ω/km at 20°C, ensuring minimal voltage drop even over long cable runs (up to 1km), which is essential for maintaining stable power supply to distant equipment.

Tensile Strength: Annealed Copper Conductors exhibit a tensile strength of 220–260 MPa, enabling them to withstand the mechanical stresses of installation, such as pulling and tensioning, without breaking.

Material Properties: Cross-linked polyethylene (XLPE) formed through radiation cross-linking (electron beam irradiation), which creates a three-dimensional molecular network. This structure enhances thermal stability, Chemical Resistance, and mechanical strength compared to non-cross-linked polyethylene.

Thickness: 2.0mm, providing a dielectric strength of ≥25 kV/mm. This thickness ensures effective insulation even under high-voltage conditions, preventing electrical breakdown.

Temperature Ratings: Designed for continuous operation at 90°C, with short-circuit (5-second duration) temperature tolerance up to 250°C. This allows the cable to handle temporary overloads and fault conditions without permanent insulation damage, a critical feature in industrial environments with fluctuating power demands.

Insulation Resistance: Exceeds 1000 MΩ·km at 20°C, ensuring low leakage current and reliable insulation performance over the cable’s service life.

Water Tree Resistance: Formulated to resist water treeing, a phenomenon where moisture-induced conductive paths form in the insulation, which can lead to premature failure. This makes the cable suitable for damp environments such as underground installations and industrial wash-down areas.

Material Composition: Polyvinyl chloride (PVC) compound blended with flame-retardant additives (antimony trioxide), UV stabilizers (carbon black), and antioxidants. This formulation ensures the sheath is resistant to environmental degradation, mechanical damage, and flame spread.

Thickness: 2.2mm, providing robust mechanical protection against abrasion, impact, and crushing. The thickness is uniform around the entire cable circumference to ensure consistent protection.

Mechanical Properties: Tensile strength ≥12 MPa, elongation at break ≥150%, and impact resistance ≥12 kJ/m² at -10°C. These properties ensure the sheath can withstand the rigors of installation and operation, including contact with sharp objects, heavy loads, and temperature fluctuations.

Flame Retardancy: Meets IEC 60332-1 (vertical flame test) and achieves a UL 94 V-0 rating, ensuring the sheath self-extinguishes within 10 seconds after the flame source is removed, reducing fire spread risk in enclosed spaces.

Chemical Resistance: Resistant to dilute acids, alkalis, mineral oils, and most industrial solvents, making it suitable for use in chemical plants, refineries, and industrial facilities with potential chemical exposure.

UV Resistance: The UV stabilizers prevent degradation from prolonged sunlight exposure, extending service life in outdoor installations such as open-air substations and renewable energy facilities.

Rated Voltage: 0.6/1kV (phase-to-earth/phase-to-phase), compliant with IEC 60502-1 and DIN VDE 0276-603 standards, suitable for medium and low-voltage distribution systems.

Current-Carrying Capacity (Ampacity):

Outer Diameter: Approximately 32mm, ensuring the cable can fit into standard conduits and cable trays with a minimum internal diameter of 40mm.

Minimum Bending Radius: 12×outer diameter (384mm) for fixed installations and 20×outer diameter (640mm) for flexible installations, allowing for routing around obstacles in industrial and construction environments.

Weight: Approximately 3.8 kg/m, requiring specialized handling equipment for installation due to its heavy weight.

Heavy Manufacturing Plants: Serves as the main power Feeder Cable in steel mills, automotive factories, and machinery plants, connecting transformers to main distribution panels. It supplies power to large motors (500kW and above), industrial furnaces, and heavy machinery, where high current demands are common.

Chemical and Petrochemical Facilities: Used in hazardous areas (Zone 2) to power pumps, compressors, and processing equipment. The PVC sheath’s chemical resistance protects against exposure to solvents, oils, and corrosive substances, while the flame retardancy reduces fire risks in flammable environments.

Mining Operations: Deployed in underground mines to transmit power from surface substations to mining equipment such as excavators, conveyors, and ventilation systems. The cable’s mechanical strength withstands the harsh conditions of mining environments, including vibration, impact, and moisture.

Renewable Energy Facilities: Used in wind farms and solar power plants as part of the collection system, transmitting electricity from multiple turbines or solar panels to the substation. The 300mm² conductor handles the high current generated by large-scale renewable energy installations, while the UV-resistant sheath ensures durability in outdoor environments.

Power Distribution Networks: Acts as a feeder cable in urban and rural power grids, connecting substations to industrial zones and residential areas. Its high ampacity allows it to supply power to multiple neighborhoods or large industrial complexes, reducing the need for multiple smaller cables.

Backup Power Systems: Used in data centers, hospitals, and critical infrastructure to connect backup generators to main distribution panels. The cable’s reliability ensures uninterrupted power supply during grid outages, a critical requirement for mission-critical facilities.

Large Commercial Complexes: Powers shopping malls, hotels, and convention centers, where high-power demands from HVAC systems, elevators, and lighting require a robust Distribution Cable. The cable’s flame retardancy enhances safety in crowded public spaces.

High-Rise Buildings: Serves as the main riSer Cable in skyscrapers, distributing power from the building’s main switchboard to floor distribution panels. The 300mm² conductor supports the combined load of multiple floors, including residential units, offices, and amenities.

Transportation Hubs: Used in airports, train stations, and seaports to power lighting, security systems, and heavy-duty equipment such as cranes and baggage handling systems. The cable’s mechanical durability withstands the high-traffic, high-vibration environments of transportation hubs.

Damp and Wet Locations: Suitable for installation in underground garages, tunnels, and water treatment plants, where exposure to moisture is common. The XLPE insulation’s water tree resistance and PVC sheath’s water resistance prevent insulation degradation.

Outdoor Installations: Deployed in open-air substations, outdoor lighting systems, and construction sites. The UV-stabilized sheath protects against sunlight-induced aging, while the robust construction withstands temperature extremes and weather conditions.

High-Temperature Environments: Used in industrial bakeries, glass manufacturing plants, and foundries, where ambient temperatures can reach up to 60°C. The XLPE insulation’s high-temperature tolerance ensures stable performance in these harsh conditions.

High-purity electrolytic copper is chosen for its exceptional conductivity, which minimizes energy loss during transmission. The copper is annealed at 450–500°C in a nitrogen atmosphere to reduce brittleness and improve ductility, making it easier to strand and bend without cracking. This annealing process also ensures the conductor retains its conductivity while enhancing flexibility.

The class 2 stranding (133 strands of 1.7mm diameter) creates a compact, Flexible Conductor that can be easily routed around obstacles. The stranding pattern is designed to ensure uniform current distribution across all strands, preventing overheating in high-current applications.

Radiation-cross-linked XLPE is preferred over chemical cross-linking for its uniformity and purity. The cross-linking process, performed using an electron beam, creates a thermoset material that retains its mechanical and electrical properties at high temperatures, unlike thermoplastic materials that soften. This ensures the insulation remains stable under overload conditions, a critical feature for high-Power Cables.

The XLPE insulation is clear, allowing for visual inspection of the conductor surface during manufacturing and installation. This transparency helps identify any defects such as scratches or oxidation that could affect performance.

The PVC sheath is formulated for durability and flame resistance. It contains 10–15% antimony trioxide, a flame retardant that inhibits combustion by releasing free radicals that disrupt the flame chemistry. Carbon black (2–3%) is added as a UV stabilizer, protecting the sheath from sunlight-induced degradation and extending its outdoor service life to 20+ years.

The sheath is black, providing a uniform, professional appearance suitable for both indoor and outdoor installations. Black also absorbs heat, which can help dry the sheath in damp environments, reducing moisture absorption and preventing mold growth.

The cable has a round, concentric design with three layers: conductor, XLPE insulation, and PVC sheath. This layered structure ensures each component performs its function without compromising others—the conductor provides high conductivity, the XLPE insulation ensures electrical isolation, and the PVC sheath offers mechanical and environmental protection.

The cable’s surface is smooth, reducing friction during installation and making it easier to pull through conduits and cable trays. This smooth surface also minimizes the risk of damage to the sheath during handling.

Wire Drawing: Copper rods (8mm diameter) are drawn through a series of diamond dies to reduce their diameter to 1.7mm. This process is performed in multiple stages, with each stage reducing the diameter by 10–15% to ensure uniform wire quality. The drawn wires are inspected for diameter consistency and surface defects using laser measurement tools.

Annealing: The 1.7mm wires are annealed in a continuous furnace under a nitrogen atmosphere at 450°C. This process relieves internal stresses, softening the copper and improving its ductility. The annealing time is precisely controlled to ensure the wires achieve a tensile strength of 220–260 MPa.

Stranding: 133 strands of 1.7mm wire are twisted together in a planetary stranding machine at a lay length of 16–20 times the conductor diameter (approximately 50–60mm). The stranding machine uses computerized controls to ensure uniform tension across all strands, preventing strand slippage and ensuring a compact, round conductor.

The Stranded Conductor is fed into an insulation extrusion line. The XLPE compound, which is free of additives that could affect electrical performance, is melted in an extruder at 120–150°C. The molten XLPE is forced through a cross-head die, which applies a 2.0mm thick layer of insulation around the conductor.

Radiation Cross-Linking: The Insulated Conductor is exposed to an electron beam (10–30 MeV) in a radiation chamber. This process cross-links the XLPE molecules, transforming the material from a thermoplastic to a thermoset. The radiation dose is carefully controlled to ensure a cross-linking degree of ≥70%, which is necessary for achieving the insulation’s high-temperature resistance.

Cooling and Sizing: The insulated conductor is cooled in a water bath to solidify the insulation, with the water temperature gradually reduced from 80°C to 20°C to prevent thermal stress. A laser gauge measures the insulation thickness at multiple points, with automatic adjustments to the extruder speed to maintain the 2.0mm specification.

The insulated conductor is fed into a sheath extrusion line. The PVC compound, containing flame retardants, UV stabilizers, and antioxidants, is melted in an extruder at 170–190°C. The molten PVC is extruded over the XLPE insulation through a cross-head die, forming a 2.2mm thick outer sheath.

Cooling and Sizing: The Sheathed Cable is cooled in a water bath to solidify the PVC, with the cooling process controlled to prevent shrinkage or warping. A sizing die ensures the outer diameter is consistent at 32mm, with laser measurements taken every 10cm to verify dimensional accuracy.

Surface Inspection: The cable’s surface is inspected using a vision system to detect defects such as bubbles, cracks, or uneven thickness. Any defective sections are marked and removed, ensuring only high-quality cable proceeds to the next stage.

Conductor Testing: The finished conductor is tested for DC resistance using a micro-ohmmeter, ensuring it meets the ≤0.062 Ω/km requirement at 20°C. A tensile test is also performed on sample strands to verify tensile strength.

Insulation Testing: The insulated conductor undergoes a dielectric strength test, with 10kV applied for 5 minutes to ensure no breakdown occurs. Insulation resistance is measured using a megohmmeter, with a minimum requirement of 1000 MΩ·km.

Sheath Testing: Samples of the PVC sheath are tested for tensile strength (≥12 MPa), elongation at break (≥150%), and impact resistance (≥12 kJ/m² at -10°C). A flame retardancy test is performed per IEC 60332-1, with the sheath required to self-extinguish within 10 seconds.

Overall Cable Testing: The finished cable is tested for voltage withstand (3kV for 5 minutes), partial discharge (≤10 pC at 1.73kV), and bending resistance (12×diameter for 10 cycles). These tests ensure the cable can withstand the electrical and mechanical stresses of real-world applications.

The finished cable is wound onto large steel spools with a diameter of 1200mm and flange width of 400mm. The spooling process is performed at a controlled speed (5–10 m/min) to prevent cable damage, with the cable secured to the spool using steel strapping at 1m intervals. Each spool can hold 100m, 250m, or 500m of cable, depending on customer requirements.

Steel Spools: All cable lengths are wound onto heavy-duty steel spools with a 1200mm diameter and 400mm flange width. The spools are constructed from 5mm thick steel, with reinforced flanges to prevent deformation under the cable’s weight (up to 1900kg for a 500m spool). Each spool is fitted with a steel axle (50mm diameter) to facilitate handling with forklifts or cranes.

Protective Wrapping: The cable on each spool is wrapped with a 0.2mm thick UV-resistant polyethylene film to protect against dust, moisture, and sunlight. A layer of kraft paper is added between the cable layers to prevent abrasion during transportation.

Each spool is labeled with a durable, weather-resistant tag containing:

Safety warnings (e.g., "Avoid excessive bending," "Handle with lifting equipment")

For orders with multiple spools (5 or more), spools are secured onto wooden pallets (1200×1000mm) using steel strapping. Each pallet holds up to 4 spools (total weight ≤8000kg) to comply with transportation weight limits.

Pallets are wrapped with stretch film to stabilize the spools during transit and protect against moisture. A weatherproof label is attached to each pallet, repeating the key product information for easy identification.

Road Transport: Suitable for short to medium distances (up to 500km). Spools are loaded onto flatbed trucks or curtain-sided trailers, secured with ratchet straps to prevent movement. For palleted orders, trucks with lift gates are used to facilitate unloading.

Rail Transport: Preferred for long-distance shipments (over 500km) due to lower cost and reduced risk of damage. Spools are loaded into railcars with reinforced floors, secured using chains and blocking to prevent shifting during transit.

Sea Transport: For international shipments, spools are containerized in 40ft high-cube containers. Each container holds up to 12 spools (500m each) or 24 pallets, with dunnage used to fill gaps and prevent movement. Containers are climate-controlled to avoid extreme temperature fluctuations that could affect the cable’s materials.

Spools must be lifted using forklifts or cranes with appropriate lifting equipment (e.g., slings, hooks) attached to the spool’s axle. Lifting from the flange edges is prohibited, as this can cause flange deformation.

During loading and unloading, the cable must be kept away from sharp edges and abrasive surfaces to prevent sheath damage. Operators are required to wear protective gear (gloves, steel-toe boots) to avoid injury.

Temperature-controlled 运输 is recommended for shipments in extreme climates (below -15°C or above 40°C) to prevent the PVC sheath from becoming brittle or soft, which could affect handling and performance.

Each shipment includes a packing list detailing the number of spools, lengths, and batch numbers for traceability.

A certificate of compliance is provided, confirming that the cable meets IEC 60502-1, DIN VDE 0276-603, and other relevant standards.

For international shipments, additional documentation includes a commercial invoice, bill of lading, and customs declarations, with product codes (HS code: 85444920) for tariff classification.

Upon order confirmation, production lead time is 10–15 business days, depending on stock availability. Customers are provided with a pro forma invoice and estimated delivery date.

Once production is complete, the customer is notified, and shipping details (carrier name, tracking number, estimated arrival time) are shared via email or SMS.

EXW (Ex Works): Customer arranges transportation from the manufacturer’s facility, responsible for loading and shipping costs.

FOB (Free on Board): Manufacturer loads the cable onto the customer’s chosen carrier at the port/terminal, with the customer covering onward shipping costs.

DDP (Delivered Duty Paid): Manufacturer handles all transportation, customs clearance, and delivery to the customer’s site, with costs included in the order price.

Upon delivery, the customer is required to inspect the spools for visible damage (e.g., bent flanges, torn wrapping, sheath scratches). Any issues must be reported within 48 hours of delivery to initiate a claim.

A delivery receipt is signed by the customer, acknowledging receipt of the cable in good condition or noting any damages.

Samples are 1–5m lengths of the cable, cut from production batches to ensure they represent the full-length product.

Each sample includes a label with the batch number, production date, and compliance marks for traceability.

Customers can request samples via the manufacturer’s website or sales team, with a nominal fee (refundable on subsequent bulk orders) to cover processing and shipping costs.

Samples are shipped within 3–5 business days via express courier (e.g., DHL, FedEx) to ensure prompt delivery.

A test report is provided with each sample, including results for conductor resistance, insulation resistance, and sheath mechanical properties.

The manufacturer offers technical support for customer-conducted tests, including guidance on test methods and interpretation of results.

The cable comes with a 10-year warranty against manufacturing defects, covering issues such as insulation breakdown, sheath cracking, or conductor defects that affect performance.

Warranty claims require proof of purchase and a detailed description of the issue, including photos or test reports. The manufacturer reserves the right to inspect the cable to determine the cause of the defect.

A team of engineers is available to provide installation guidance, including recommendations for bending radii, termination methods, and compatibility with other components (e.g., connectors, glands).

For complex installations, on-site support can be arranged, with engineers visiting the site to supervise cable laying and address any technical challenges.

In the event of damage during installation or operation, the manufacturer offers repair services for minor sheath damage (e.g., using heat-shrink sleeves). For severe damage (e.g., insulation breach), replacement of the affected section is recommended.

Replacement cables are shipped within 5–7 business days of a confirmed claim, with expedited shipping available for urgent cases.

The manufacturer offers training programs for electricians and installers, covering proper handling, installation, and maintenance of the cable. Training can be conducted on-site or via webinars, including practical demonstrations of termination techniques and safety procedures.

Customers are encouraged to provide feedback on the cable’s performance, which is used to identify areas for improvement in material selection, production processes, or documentation.

Periodic surveys are conducted to assess customer satisfaction, with a commitment to resolving any issues within 48 hours of notification.