Detailed Introduction to N2xh Series Cables
I. Core Information of the Product Itself
(I) Detailed Explanation of Specification Parameters
Basic Specification Description
N2xh, N2xh-J, and N2xh-O series cables include both single-core and
Multi-Core types, with conductor cross-sectional areas ranging from 1.5mm² to 800mm² and a rated voltage of 0.6/1kV, which can meet the power transmission needs of different power levels. Single-
Core Cables are suitable for single-phase power transmission scenarios, while
Multi-Core Cables are mostly used for three-phase power transmission, which can reduce laying space and costs.
Cables with different cross-sectional areas have obvious differences in current-carrying capacity. Under the conditions of an ambient temperature of 25°C and laying in the air, a 1.5mm² cable has a long-term allowable current-carrying capacity of about 18A. Calculated according to the three-phase power formula, it can carry a load of about 9.5kW, which is suitable for power supply of lighting and small household appliances; a 10mm² cable has a current-carrying capacity of about 55A and can carry a load of about 29kW, which can meet the needs of small industrial equipment; a 25mm² cable has a current-carrying capacity of about 85A and a carrying power of about 45kW, which is suitable for medium-sized machine tools and other equipment; a 120mm² cable has a current-carrying capacity of about 230A and can carry a load of about 121kW, which is applicable to building power distribution branches; an 800mm² cable has a current-carrying capacity of up to 800A and a carrying power of about 424kW, which can supply power to large chillers and other equipment.
The outer diameter of the cable increases with the increase of the cross-sectional area. The outer diameter of a 1.5mm²
Single-Core Cable is about 5mm, and that of an 800mm² single-core cable is about 60mm. The bending radius of multi-core cables varies according to specifications. For example, the bending radius of a 4-core 120mm² cable is 240mm, which can not only ensure
Flexibility during laying but also avoid damage to the cable caused by excessive bending.
Safety and Performance Parameters
The DC resistance of the conductor of this series of cables is strictly controlled within industry standards. For 1.5mm² cables, it is ≤12.1Ω/km, and for 800mm² cables, it is ≤0.021Ω/km (both at 20°C), ensuring that the loss during power transmission is at a low level. The insulation resistance is ≥100MΩ·km (at 20°C), and there is no breakdown in the power frequency withstand voltage test at 3kV for 5 minutes. In terms of partial discharge capacity, the N2xh-J model performs better, with ≤5pC (under 1.73U0), and other models with ≤10pC, ensuring the safe and stable operation of the cable under the rated voltage.
The low smoke zero halogen sheath has excellent mechanical properties, with a tensile strength of ≥12MPa and an elongation at break of ≥125%. After 1000 bending tests, the sheath has no cracks and the insulation performance does not decrease significantly. At the same time, the sheath has passed relevant fire resistance tests, which can delay the spread of fire in case of fire and gain time for personnel evacuation and equipment rescue.
(II) Material and Structural Design
Core Material Composition
Conductor: High-purity electrolytic copper (copper content ≥99.95%) is used as the Conductor Material, which has excellent electrical conductivity. The conductor of single-core cables has a solid structure, while the conductor of multi-core cables is made by stranding multiple fine Copper Wires. Multi-core cables with 1.5-10mm² are stranded with 19 strands of fine copper wires, those with 25-120mm² with 37 strands, and those with 800mm² with more strands. This stranded structure not only improves the flexibility of the conductor, making it easy to lay and install, but also reduces the current skin effect and transmission loss.
Insulation Layer: Weather-resistant cross-linked polyethylene (XLPE) is used as the Insulation Material, and its thickness is adjusted according to the cross-sectional area of the cable. The insulation thickness of 1.5mm² cables is about 0.7mm, and that of 800mm² cables is about 3mm. XLPE Insulation Material has good temperature resistance, with a long-term working temperature of up to 90°C and a short-term overload temperature of up to 130°C. It also has stable insulation performance and low dielectric constant, which can effectively isolate current and ensure the safety of power transmission.
Sheath: This series of cables is equipped with a low smoke zero halogen (LSZH) sheath. This sheath material emits low smoke and no toxic gas when burned, and has passed the GB/T 17651.2-1998 test, with a light transmittance of ≥60% and a halogen acid gas emission of ≤0.5%. The sheath thickness also varies with the cable specification. The sheath thickness of 1.5mm² cables is about 0.8mm, and that of 800mm² cables is about 4mm. In addition, the sheath of the N2xh-O model is added with anti-ultraviolet additives, which can effectively resist ultraviolet aging and extend the service life outdoors; the sheath of the N2xh-J model is optimized in material ratio to further improve the stability of the cable.
Structural Advantages
The cable adopts a three-layer basic structure of "conductor → insulation layer → sheath" (multi-core cables also include a filling layer and a wrapping layer). The conductor and the insulation layer are closely combined, and the extrusion process ensures that there are no bubbles or gaps between them, improving the insulation performance. The cores of multi-core cables are filled with filling materials to make the cable structure more round and reduce friction and extrusion between cores. The filling material is an inert material and will not corrode other parts of the cable.
The wrapping layer is made of non-woven fabric, which tightly wraps the multi-core wires together to enhance the overall structural strength of the cable. The sheath tightly wraps around the wrapping layer to form a solid protective layer, which can resist external mechanical impact, wear, and chemical corrosion. This structural design enables the cable to have both good electrical and mechanical properties and can operate stably in various complex environments.
(III) Characteristic Uses and Scene Adaptation
Application Scenarios by Model
N2xh (basic model): Suitable for power transmission scenarios in general industrial and civil buildings, such as power distribution systems in ordinary office buildings and shopping malls. Its balanced performance and reasonable price can meet the power needs of most conventional environments. In these places, it can be used as a Power Supply Cable for lighting, air conditioners, elevators, and other equipment to transmit power stably.
N2xh-J (stable model): Due to its low partial discharge capacity (≤5pC) and stronger stability, it is suitable for scenarios with high requirements for power supply stability, such as hospital operating rooms and precision laboratories. In these places, the stable transmission of power is directly related to the normal operation of equipment and the accuracy of experimental results. This model of cable can effectively reduce power fluctuations caused by discharge.
N2xh-O (outdoor weather-resistant model): With anti-ultraviolet and IP65 waterproof performance, it is specially used in outdoor scenarios, such as street lamp power supply lines and outdoor substation outlet lines. In outdoor environments, it can resist the erosion of natural factors such as wind, sun, rain, and ensure the continuous transmission of power.
Adaptation Scenarios by Cross-Sectional Area
Cables with 1.5-10mm²: Widely used in lighting systems of homes and small commercial places, power supply lines of small household appliances, and control lines. For example, chandeliers, wall lamps, and other lighting equipment in homes, and small display lamps in shopping malls can all use cables of this specification.
Cables with 25-120mm²: Commonly used for power supply of small and medium-sized machine tools, fans, water pumps, and other equipment in industrial plants, as well as power distribution branches of office buildings, hotels, and other buildings. In industrial production, the normal operation of these equipment is inseparable from stable power supply, and cables of this specification can meet their power needs.
Cables with 150-800mm²: Mainly supply power to the main power distribution lines of large industrial equipment and large buildings, such as large chillers and the power distribution lines from the main distribution cabinet of factories to workshops. These scenarios have high requirements for power transmission capacity, and cables with large cross-sectional areas can ensure efficient power transmission.
(IV) Production Process and Quality Control
Key Production Processes
Conductor Preparation: First, high-purity electrolytic copper is smelted and cast into ingots, and then the ingots are drawn into copper wires of the required diameter through a wire drawing process. For the conductors of multi-core cables, multiple strands of copper wires are stranded in a certain way. During the stranding process, the tension and pitch must be controlled to ensure that the conductor structure is tight and round. The conductor of single-core cables is made into a solid structure through an extrusion molding process.
Insulation Extrusion: A special extruder is used to evenly extrude XLPE insulation material outside the conductor to form an insulation layer. During the extrusion process, the extrusion temperature, speed, and pressure must be accurately controlled to ensure that the insulation layer has a uniform thickness, a smooth surface, and is closely combined with the conductor. The extruded insulation layer must undergo cooling and shaping treatment to ensure its dimensional stability.
Cabling (for multi-core cables): Multiple Insulated Cores are arranged according to the design requirements, filling materials are filled between the cores, and then non-woven fabric is used for wrapping to form a round cable core. During wrapping, it is necessary to ensure that the wrapping is tight and flat to avoid loosening and wrinkles.
Sheath Extrusion: An extruder is used to extrude low smoke zero halogen sheath material outside the cable core to form a sheath layer. Similarly, the extrusion parameters must be controlled to ensure that the sheath layer has a uniform thickness, a smooth surface, and is closely combined with the cable core. After extrusion, the cable is cooled, pulled, and then taken up.
Quality Inspection Standards
Each batch of cables must undergo strict quality inspection during production and before leaving the factory. During production, online inspections are carried out on the diameter of the conductor, stranding pitch, thickness and appearance of the insulation layer and sheath layer, and production parameters are adjusted in a timely manner if problems are found.
Inspection items before leaving the factory include: Conductor DC resistance test to ensure it meets relevant standards; insulation resistance test to ensure good insulation performance; power frequency withstand voltage test to inspect the insulation strength of the cable; partial discharge test, especially for the N2xh-J model, to strictly control the partial discharge capacity; performance tests of the low smoke zero halogen sheath, such as light transmittance and halogen acid gas emission. Only cables that pass all inspection items can leave the factory.
II. Description of General Product Information
(I) Packaging Specifications
Packaging Form
Different packaging methods are adopted according to the specifications and lengths of the cables. For small cross-sectional area cables (1.5-10mm²) with short lengths (such as within 100m), they are usually packaged in hard paper tubes. The two ends of the paper tubes are sealed with plastic covers to prevent the cables from getting damp and damaged.
Medium and long-length cables and those with large cross-sectional areas are packaged with steel-wood structure cable reels. The diameter of the cable reel is determined according to the cable specification. The diameter of the cable reel for small cross-sectional area cables is about 0.8m, and that for large cross-sectional area cables can reach 2.5m. The length of cables that each reel can hold varies according to specifications. Generally, small cross-sectional area cables can hold 500-1000m per reel, and large cross-sectional area cables can hold 100-300m per reel.
The outer part of the package is clearly marked with the cable's model, specification, length, rated voltage, production date, production batch number, and other information for users to identify and accept. At the same time, warning signs such as "Handle with Care", "Keep Dry", and "Avoid Sunlight" are also marked to remind of precautions during transportation and storage.
Protection Design
The wooden part of the cable reel has undergone anti-corrosion treatment, which can effectively resist the erosion of mold and pests. The steel part is galvanized to prevent rust. Protective baffles are installed on the edges of the cable reel to avoid collision and wear of the cable during transportation.
For cables packaged in paper tubes, moisture-proof paper is lined inside the paper tubes to prevent the cables from getting damp. The strength of the paper tubes has been strictly tested and can withstand a certain pressure to avoid being crushed when stored in stacks.
(II) Transportation and Storage Requirements
Transportation Specifications
During transportation, cables should avoid severe collision, extrusion, and bending. When transporting with a truck, the cable reels should be placed flat and fixed firmly with steel wire ropes or special fixing devices to prevent rolling during driving. For cables packaged in paper tubes, they should be stacked neatly, and the stacking height should not be too high to avoid damage to the cables at the bottom.
Moisture-proof, sun-proof, and high-temperature prevention measures should be taken during transportation. When transporting in rainy days, the cables must be completely covered with a raincloth to prevent rainwater from entering the package; when transporting in high-temperature weather, the cables should be avoided from being exposed to the sun for a long time, and sunshade measures can be taken.
Special lifting equipment should be used for loading and unloading, and rough handling is strictly prohibited. When loading and unloading cable reels, they should be lifted from the central axis of the cable reel to avoid deformation of the cable reel or damage to the cable caused by lifting from the edge.
Storage Conditions
Cables should be stored in a dry, ventilated, and clean warehouse, away from fire sources, heat sources, corrosive gases, and liquids. The temperature in the warehouse should be controlled between -15°C and 40°C, and the relative humidity should not exceed 70%.
Cable reels should be stored on a flat ground and padded with wooden blocks to keep them away from the ground and prevent dampness. A certain distance should be maintained between cable reels for ventilation and inspection. Cables packaged in paper tubes should be stored upright to avoid deformation caused by flat stacking.
During storage, cables should be inspected regularly to observe whether the appearance of the cables is damaged and whether the sheath is cracked or discolored. At the same time, the warehouse should be kept clean to prevent dust and debris from polluting the cables. The storage period is generally 2 years. Cables that exceed the storage period should be re-tested for performance before use and can be used only if they are qualified.
II. Description of General Product Information
(I) Packaging Specifications
Packaging Form
A differentiated packaging strategy is adopted for cables of different specifications. For small cross-sectional area cables of 1.5mm²-10mm², if the length is within 50 meters, they are packaged with plastic reels with good sealing performance. There are baffles on both sides of the reels to prevent the cables from falling off, and a moisture-proof plastic bag is covered outside. For those with a length of more than 50 meters, small wooden cable reels are used, which are light and easy to carry manually.
For cables of 25mm²-120mm², medium-sized steel-wood structure cable reels are used. The diameter of the reels is adjusted according to the length, generally between 0.8 meters and 1.2 meters, and each reel can hold 100-300 meters of cables. Metal brackets are installed on the reels for easy fixing and lifting.
For large cross-sectional area cables of 150mm²-800mm², large steel-wood structure cable reels are used. The diameter of the reels can reach more than 2 meters, which can bear a large weight. Detailed labels are attached to the sides of the cable reels, indicating the model, specification, length, production batch number, execution standard, and other information of the cables.
Protection Design
All packages have good moisture-proof performance. The gaps between the wooden boards of the wooden cable reels are filled with sealant, and the metal parts are rust-proof treated. The plastic reels and moisture-proof plastic bags are made of aging-resistant materials, which can resist ultraviolet erosion to a certain extent.
Thick rubber protective rings are added to the edges of the cable reels, which can reduce damage to the cables even if there is a slight collision during transportation and storage. For N2xh-O model cables used outdoors, an additional layer of wear-resistant protective film is covered outside the package to further enhance the protection of the cables.
(II) Transportation and Storage Requirements
Transportation Specifications
Small trucks can be used to transport small cross-sectional area cables. The plastic reels or small cable reels are fixed in the carriage to avoid mutual collision. Medium and large cable reels need to be transported by trucks with lifting equipment. When loading, it is necessary to ensure that the cable reels are placed stably and fixed firmly with steel wire ropes or special fixing belts. Rubber pads are placed at the contact parts with the carriage to reduce the impact of vibration.
During transportation, corresponding protective measures should be taken according to the weather conditions. In case of rainy days, it is necessary to cover with a 篷布 with excellent waterproof performance, and the 篷布 should be wrapped to the bottom of the cable reel to prevent rainwater from seeping in; in high-temperature weather, try to choose to transport in the morning and evening, avoid the noon high-temperature period, and install a sunshade on the top of the carriage at the same time.
Storage Conditions
The storage warehouse should be well-ventilated, and ventilation equipment should be installed to ensure air circulation. For
Outdoor Cables such as N2xh-O, they should be stored
(Continued from Previous)
Customers can consult the company for suitable cable models and specifications based on their own usage scenarios, power requirements and other information. The company's technical personnel will provide professional selection suggestions according to the information provided by customers, combined with the performance characteristics and application experience of the cables.
In addition, the company also provides installation and laying training services. For bulk purchase customers, technical personnel can be arranged to conduct on-site training, including cable laying methods, precautions, terminal processing, etc., to help customers correctly install and use cables and reduce faults caused by improper installation. At the same time, the company will regularly release cable maintenance knowledge, which customers can obtain through official websites, official accounts and other channels to learn how to carry out daily maintenance of cables and extend their service life.
(V) Product Certifications and Qualifications
This series of cables has passed relevant national product certifications and meets the requirements of standards such as GB/T 12706.1-2020 "Extruded Insulation
Power Cables and Accessories for Rated Voltages from 1kV (Um=1.2kV) to 35kV (Um=40.5kV) - Part 1: Cables for Rated Voltages 1kV (Um=1.2kV) and 3kV (Um=3.6kV)". At the same time, it has also passed relevant special certifications such as low smoke zero halogen performance certification and fire resistance certification, proving that its performance in safety, environmental protection and other aspects meets the specified standards.
The company has a sound quality management system and has passed the ISO9001 quality management system certification. There are strict management regulations in all links from raw material procurement, production process control to product inspection and after-sales service to ensure the stability and reliability of product quality. Relevant certification certificates and qualification documents can be provided at the request of customers for their review and verification.
III. Summary of Product Advantages
The N2xh series cables have significant advantages in the field of low-voltage power transmission relying on comprehensive specification coverage, high-quality material selection, exquisite production technology and a sound service system.
In terms of specifications, the cross-sectional area range from 1.5mm² to 800mm² and the design of single-core and multi-core types can meet the full-scene power transmission needs from household lighting to large industrial equipment. The differentiated design of different models, the versatility of N2xh, the high stability of N2xh-J and the outdoor weather resistance of N2xh-O, allow customers to make precise choices according to specific scenarios.
In terms of materials, high-purity electrolytic
Copper Conductors ensure excellent electrical conductivity, weather-resistant XLPE insulation layers provide reliable insulation protection, and low smoke zero halogen sheaths perform well in safety and environmental protection. The low smoke and zero halogen characteristics during combustion greatly reduce the fire risk.
In terms of production technology, strict production process control and comprehensive quality inspection ensure that the quality of each batch of cables can meet the standards. From conductor preparation to sheath extrusion, each link has precise parameter control and online inspection. Multiple performance tests before leaving the factory further guarantee product quality.
In terms of general information, scientific packaging specifications and reasonable transportation and storage requirements reduce the risk of damage to cables during circulation. Efficient delivery processes, considerate sample services and perfect after-sales services provide customers with full-cycle guarantees from purchase to use.
To sum up, the N2xh series cables are low-voltage
Power Cables with excellent performance, wide application range and guaranteed services, which can provide reliable solutions for various power transmission scenarios.
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