XLPE insulated 310mm² and 38mm² copper Power Cables have detailed and precise settings in terms of specification parameters to ensure their stable and efficient power transmission in various electrical systems.

The conductor specifications are clear, being 38mm² and 310mm² respectively. The conductor is made of high-purity oxygen-free copper with a purity of ≥99.95%, manufactured through a multi-strand precision stranding process. At 20℃, the DC resistance of the single-core conductor of the 38mm² cable is ≤0.209Ω/km, and that of the 310mm² cable is ≤0.168Ω/km. This value is much lower than the industry standard, which can minimize energy loss during power transmission and ensure efficient power transmission. The conductivity of the Copper Conductor is as high as 100% IACS (International Annealed Copper Standard), far exceeding other common Conductor Materials such as aluminum, providing strong support for scenarios with high conductivity requirements. Meanwhile, copper has excellent mechanical strength, with a tensile strength of ≥200MPa, which can withstand a certain amount of tension and bending stress, facilitating laying and installation in different environments.

The insulation layer is made of high-quality XLPE (cross-linked polyethylene) material. After special processing, its temperature resistance level reaches 90℃, enabling it to work stably for a long time in the ambient temperature range of -40℃ to 90℃. In case of a short circuit (lasting 5 seconds), it can withstand a high temperature of 250℃, effectively ensuring insulation reliability under extreme working conditions. The volume resistivity of XLPE material is ≥10¹⁴Ω·cm, and the dielectric loss tangent is ≤0.002 (at 90℃), with excellent insulation performance that can effectively isolate current, prevent leakage, and ensure the safety of power transmission. In addition, the insulation layer also has good chemical corrosion resistance, which can resist the erosion of acids, alkalis, oils and other chemical substances, prolonging the service life of the cable.

Some models of cables are equipped with a copper Tape Shielding layer, which has a uniform thickness. It can effectively suppress electromagnetic interference, reduce the impact of external signals on cable transmission, and prevent internal signals of the cable from interfering with the outside world, making it particularly suitable for occasions with high requirements for electromagnetic compatibility.

The sheath material has two options: weather-resistant PVC (polyvinyl chloride) and PE (polyethylene). The PVC Sheath has a tensile strength of ≥12MPa and an elongation at break of ≥150%, with good wear resistance and impact resistance; the PE sheath has more excellent Flexibility and low-temperature resistance, and is not easy to embrittle in low-temperature environments. The appropriate sheath material can be selected according to different usage environments.

In terms of current-carrying capacity, the 38mm² cable has a current-carrying capacity of about 55A when laid in air and about 70A when laid underground; the 310mm² cable has a current-carrying capacity of about 65A in air and about 85A when buried, which can meet the power supply needs of electrical equipment with different powers. Its minimum bending radius is 10 times the cable outer diameter (static). The outer diameter of the 38mm² cable is about 15mm, with a static bending radius of 150mm; the outer diameter of the 310mm² cable is about 17mm, with a static bending radius of 170mm, which is convenient for flexible laying in narrow spaces and complex terrains.

XLPE insulated 310mm² and 38mm² Copper Power Cables have distinct uses in multiple fields due to their excellent performance.

In the field of building Electrical Wiring, this cable is widely used. For residential buildings, it can be used to connect lighting systems and Power Lines of various household appliances to ensure stable and reliable household electricity use. Since its current-carrying capacity can meet the electricity demand of ordinary families and its insulation performance is good, it can effectively ensure the safety of residents' electricity use. In commercial buildings, it is suitable for power connection of lighting, air conditioning, elevators and other equipment in offices, shopping malls, hotels and other places. Commercial places have many electrical equipment and high requirements for the stability and safety of cables. The high conductivity and good insulation performance of this cable can meet these needs, and its small bending radius is convenient for laying in complex pipelines of buildings.

In the industrial field, this cable can be used as a power connection line for small and medium-sized motors, machine tools and other equipment. Small and medium-sized motors and machine tools have high requirements for the stability of power transmission during operation. The high conductivity of Copper Conductors reduces energy loss and ensures the normal operation of the equipment. Moreover, the cable has a certain mechanical strength, which can withstand vibrations and slight collisions that may occur in the industrial environment, prolonging the service life of the equipment.

Communication base stations and data centers have extremely high requirements for the reliability and stability of power transmission. This cable can be used for power transmission in low-voltage distribution systems in these places. The equipment in communication base stations and data centers is precise and important. Once the power is interrupted or the transmission is unstable, it may cause serious consequences. The low DC resistance and excellent insulation performance of this cable can ensure the continuous and stable supply of power. At the same time, the Copper Tape Shielding layer can reduce electromagnetic interference, ensuring the quality of communication and data transmission.

In the agricultural field, this cable is suitable for the power supply lines of agricultural irrigation equipment. Agricultural irrigation equipment usually works outdoors, and the environment is relatively complex, which may be affected by natural factors such as wind, sun and rain. The weather-resistant sheath material of the cable can resist the erosion of these environmental factors, ensure the normal operation of irrigation equipment, and provide power support for agricultural production.

Outdoor advertising facilities also rely on this cable, which can be used as the power supply line for outdoor advertising light boxes, display screens and other equipment. Outdoor advertising facilities are installed outdoors and need to withstand various harsh weather conditions. The weather resistance and insulation performance of this cable can ensure the stable power supply of advertising facilities, avoiding the failure of advertising facilities due to cable faults.

The conductor is made of high-purity oxygen-free copper with a purity of ≥99.95%. Oxygen-free copper has extremely high conductivity because its oxygen content is extremely low, reducing the obstruction of impurities to current conduction, making the conductivity as high as 100% IACS, which can efficiently transmit power and reduce energy loss. At the same time, oxygen-free copper has excellent mechanical properties, with high tensile strength and ductility. After being processed by the multi-strand precision stranding process, the flexibility of the conductor is further improved, facilitating bending and installation during laying and adapting to different wiring environments.

The insulation layer is made of high-quality XLPE (cross-linked polyethylene) material. After cross-linking treatment, the molecular structure of XLPE material forms a three-dimensional network structure, making it have excellent electrical properties, mechanical properties and temperature resistance. It has a wide temperature range, can work stably for a long time in the environment of -40℃ to 90℃, and can withstand a high temperature of 250℃ in case of short circuit, ensuring insulation reliability under extreme temperature conditions. In addition, XLPE material has good chemical stability, resistance to acid, alkali, oil and other chemical corrosion, and can effectively resist the erosion of external chemical substances on the insulation layer, prolonging the service life of the cable.

The copper tape shielding layer is made of high-quality copper tape, which has good conductivity and shielding performance. The copper tape has a uniform thickness and can evenly wrap around the outside of the insulation layer to form an effective shielding barrier. It can suppress electromagnetic interference, prevent external electromagnetic signals from affecting the internal power transmission of the cable, and also prevent the internal electromagnetic signals of the cable from radiating outward, avoiding interference with surrounding equipment, ensuring the normal operation of the cable in occasions with complex electromagnetic environments.

The PVC (polyvinyl chloride) material of the sheath has good mechanical properties, with a tensile strength of ≥12MPa and an elongation at break of ≥150%, which can withstand certain mechanical impacts and wear, protecting the internal structure of the cable from damage. Moreover, PVC material has good weather resistance and can resist the erosion of natural factors such as sunlight and rain. PE (polyethylene) material has more excellent flexibility and low-temperature resistance, and is not easy to embrittle and crack in low-temperature environments, suitable for use in cold areas. At the same time, PE material also has good chemical stability and can resist the erosion of various chemical substances.

The cable has a 3-core structure, which is round overall with a compact structure. The 3-core design corresponds to the phase lines of three-phase electricity respectively, which can meet the needs of three-phase power transmission and is suitable for various three-phase electrical equipment and systems.

The color design of the cable has certain identification. The sheath is usually black or gray, which are not only dirt-resistant but also can absorb heat, reducing the impact of direct sunlight on the cable. On the surface of the cable, there are clear marks, including cable model, specification, rated voltage, manufacturer, production date and other information, which is convenient for users to identify and trace the product.

When packaged in coils, the coil diameter of the cable varies according to specifications. The coil diameter of the 38mm² cable is about 0.8 meters, and that of the 310mm² cable is about 1.0 meter. This coil diameter design is convenient for storage and transportation, and also easy to unfold and lay at the construction site.

The production process of XLPE insulated 310mm² and 38mm² copper power cables is complex and rigorous. Each link from raw material processing to finished product inspection is subject to strict quality control to ensure that the performance and quality of the product meet relevant standards and usage requirements.

Conductor manufacturing is the first step of production. First, high-purity oxygen-free copper ingots are smelted to remove impurities and oxygen, so that the purity of copper reaches ≥99.95%. During the smelting process, it is necessary to accurately control the temperature and time to ensure the quality of the copper liquid. The smelted copper liquid is made into copper rods through a continuous casting and rolling process, and the diameter of the copper rods is determined according to the final conductor specification. Then, the copper rod is drawn into Copper Wires of different diameters through a wire drawing machine. During the wire drawing process, it is necessary to control the wire drawing speed, die precision and cooling system to ensure that the diameter of the copper wire is uniform, the surface is smooth, and there are no scratches, burrs and other defects. Next, multiple copper wires are precisely stranded according to a certain stranding pitch and direction to make a single-core conductor. The precision stranding process can improve the flexibility and mechanical strength of the conductor, and at the same time reduce the skin effect and improve the conductivity.

Insulation layer extrusion is one of the key processes. The precisely stranded single-core conductor is fed into the extruder, and at the same time, high-quality XLPE material is added into the hopper of the extruder. The XLPE material is heated, melted and plasticized in the extruder, and then evenly wrapped around the outside of the conductor through an extrusion die to form an insulation layer. During the extrusion process, it is necessary to strictly control the extrusion temperature, extrusion speed and die pressure to ensure that the thickness of the insulation layer is uniform, closely combined with the conductor, and free of bubbles, material shortages, eccentricity and other defects. The extruded Insulated Core needs to undergo cross-linking treatment, usually by means of warm water cross-linking or steam cross-linking, so that the XLPE molecules form a three-dimensional network structure, thereby improving its mechanical properties, temperature resistance and electrical properties. The cross-linked insulated core should be cooled by a cooling system to set.

For cables with a copper tape shielding layer, after the insulation layer is cooled and set, the copper tape shielding layer is lapped. The copper tape is lapped on the surface of the insulation layer with a certain overlap rate and tension through a lapping machine to form a shielding layer. During the lapping process, it is necessary to ensure that the copper tape is lapped tightly and flatly, without loosening, edge warping and other phenomena, to ensure the shielding effect.

Sheath extrusion is carried out after the shielding layer is processed (or after the insulation layer is processed for those without a shielding layer). The core with the shielding layer (or insulation layer) is fed into the sheath extruder, and PVC or PE material is added into the hopper of the extruder. The material is heated and melted in the extruder, and then evenly wrapped around the outside of the shielding layer (or insulation layer) through an extrusion die to form a sheath layer. During the extrusion process, various parameters should be controlled to ensure that the thickness of the sheath layer is uniform, the surface is smooth, closely combined with the internal structure, and free of bubbles, cracks and other defects.

The 3-core cabling process is to strand 3 cores with sheath layers (or insulation layers, shielding layers) according to a certain stranding method and pitch to form a cable core. During the cabling process, it is necessary to ensure that the 3 cores are evenly positioned and tightly stranded, and at the same time, some inert materials, such as polypropylene rope, are filled in the middle of the cable core to ensure the roundness and stability of the cable core and reduce deformation during subsequent processing and use.

During the production process, multiple quality inspections are required. The diameter, DC resistance, tensile strength of the conductor are tested; the thickness, insulation resistance, voltage resistance performance, temperature resistance performance of the insulation layer are tested; the resistance, lapping quality of the shielding layer are inspected; the thickness, tensile strength, elongation at break, weather resistance of the sheath layer are tested. The finished cable also needs to undergo overall electrical performance tests, mechanical performance tests and environmental performance tests to ensure that all indicators meet relevant standards and design requirements.

The production environment also has an important impact on product quality. The workshop needs to be kept clean and dry, and the temperature and humidity should be controlled within appropriate ranges to avoid dust, impurities and other factors affecting product performance. Production equipment should be regularly maintained and calibrated to ensure its operating accuracy and stability, and improve production efficiency and the consistency of product quality.

The packaging design of XLPE insulated 310mm² and 38mm² copper power cables fully considers the product protection, transportation and storage needs to ensure that the cable is not damaged during the entire circulation process.

The cable is packaged in coils. The length of each coil varies according to specifications, usually 100 meters, 200 meters or 500 meters. Packaging materials mainly include wooden cable reels and plastic films. The wooden cable reel is made of high-quality hardwood, which has been dried and anti-corrosive treated, with high strength and stability, and can bear the weight of the cable and the pressure during transportation and storage. Both sides of the cable reel are provided with metal flanges, and the flanges are evenly distributed with a number of holes, which is convenient for handling and loading/unloading with forklifts, cranes and other equipment.

The cable is neatly wound on the wooden cable reel, and appropriate tension is maintained during winding to avoid loosening of the cable or damage caused by mutual friction. The outer layer of the cable is wrapped with a thick layer of plastic film, which has good moisture-proof, dust-proof and anti-corrosion performance, and can effectively isolate the erosion of the cable by external moisture, dust, oil and chemical substances. The plastic film should be closely attached to the surface of the cable and stretched during winding to ensure that there is no gap between it and the cable, forming a sealed protective barrier.

A clear label is fixed on the side or flange of the cable reel. The label details the cable's model, specification, length, rated voltage, manufacturer, production date, production batch number, certification mark and other information. The label is made of waterproof and wear-resistant materials to ensure that the information is clear and legible during transportation and storage, which is convenient for users to identify, count and trace the product.

For exported products or products transported over long distances, the outer part of the wooden cable reel will be reinforced with iron sheets or wooden boxes to enhance the impact resistance and pressure resistance of the packaging and prevent the cable reel from being damaged due to collision and extrusion during transportation. At the same time, the packaging will be printed with internationally accepted warning signs, such as "Do not invert", "Moisture-proof", "Handle with care", "Stacking limit", etc., to remind transport and handling personnel to pay attention to operating specifications.

The transportation of XLPE insulated 310mm² and 38mm² copper power cables needs to select appropriate transportation methods according to factors such as transportation distance, quantity, destination and traffic conditions, and take corresponding protective measures to ensure that the cable is delivered to the destination safely and timely.

Road transportation is a commonly used transportation method, suitable for medium and short-distance transportation. The transport vehicles are usually large trucks or semi-trailers, and the compartments of the vehicles should be flat, clean and free of sharp debris. Before loading, check the integrity of the cable reel and the packaging of the cable to ensure no damage. When loading, use a forklift or crane to smoothly lift the cable reel into the carriage. There should be a certain gap between the cable reels to avoid mutual collision. For multiple cable reels, they should be arranged neatly and firmly fixed on the carriage with steel wire ropes, fastening belts, etc., to prevent movement or dumping during transportation due to vehicle bumps, sudden braking, etc. During transportation, drivers must strictly abide by traffic rules, control the speed, avoid sudden acceleration, sudden braking and sharp turns, and reduce the impact force on the cable. At the same time, attention should be paid to avoiding severe weather such as heavy rain, high temperature, cold, and strong winds to prevent the cable from being affected by extreme environments.

Railway transportation is suitable for long-distance and large-volume cable transportation, with advantages such as large transportation capacity, good stability, and relatively low cost. During railway transportation, the cable reels are loaded into the designated positions of railway freight cars and fixed firmly with special fixing devices to ensure that they do not move during transportation. For valuable or fragile cables, boxcars can be used for transportation to prevent erosion by natural factors such as wind, sun, and rain. The railway department will track and monitor the goods throughout the process to ensure transportation safety.

Waterway transportation is mainly used for exported products or long-distance cross-water transportation. Cable reels are loaded into the cabins or decks of cargo ships through the hoisting equipment at the wharf. Cable reels loaded in the cabin should be stacked reasonably to avoid stacking too high, preventing the bottom cable reels from being crushed. Cable reels loaded on the deck need to be fixed more firmly and covered with waterproof cloth to prevent seawater erosion and rain soaking. During transportation, attention should be paid to weather changes and ship navigation conditions, and timely response measures should be taken to ensure the safety of the cables.

No matter which transportation method is adopted, appropriate loading and unloading equipment such as forklifts and cranes should be used during loading and unloading. Manual rough loading and unloading is strictly prohibited to avoid damage to the cable reels or scratches and breakage of the cable sheaths. During loading and unloading, it is necessary to lift and place gently, keep the cable reels stable, and avoid severe impacts. Transport personnel should be familiar with the characteristics and transportation requirements of the cables, and operate in strict accordance with the operating procedures to ensure the safety of the cables during transportation.

The company has established a sound shipping process to ensure that XLPE insulated 310mm² and 38mm² copper power cables can be sent to customers in a timely and accurate manner.

After the customer places an order, the sales department will enter the order information into the system immediately and transmit it to the warehouse department. The order information includes customer name, contact information, delivery address, cable model, specification, quantity, delivery date, transportation method, etc. After receiving the order, the warehouse management personnel first review the order information to confirm the accuracy and completeness of the information. If any errors or incompleteness are found, they will communicate and coordinate with the sales department in a timely manner, and proceed with subsequent operations only after confirmation.

After the review is passed, the warehouse management personnel will prepare the goods according to the order requirements. During the goods preparation process, in accordance with the first-in-first-out principle, the corresponding type, specification, and quantity of cables are retrieved from the warehouse. At the same time, the packaging, labels, and appearance of the cables are carefully inspected to ensure that the quality of the cables is intact and the information is consistent with the order. If the cables are found to have damaged packaging, blurred labels, or scratches on the appearance, they will be replaced in a timely manner to ensure that the products sent to customers meet the quality requirements.

After the goods are prepared, the warehouse management personnel transfer the cables to the logistics department. The logistics department contacts the corresponding transportation company according to the transportation method required in the order and arranges for vehicles to pick up the goods. When handing over the cables to the transportation company, the logistics personnel and the person in charge of the transportation company jointly check the quantity, specification, and packaging of the cables. After confirmation, they sign the handover documents. At the same time, the transportation company is informed of the cable transportation precautions, such as avoiding inversion, moisture, and heavy pressure.

The logistics department tracks the transportation process of the cables in real-time. Through the positioning system and communication with the transportation company, it masters the location and transportation status of the cables. If any problems or delays occur during transportation, it will promptly communicate with the customer and the transportation company to coordinate and solve them, ensuring that the cables arrive at the destination on time.

After the cables arrive at the destination, the logistics department confirms with the customer whether they have been received and whether the quantity and quality of the cables are in line with the order requirements. If the customer has any questions or problems, the logistics department will assist in handling them in a timely manner to ensure customer satisfaction.

The company provides sample services for XLPE insulated 310mm² and 38mm² copper power cables to help customers understand the performance and quality of the products before purchasing in large quantities.

Customers can apply for samples through the company's sales staff or official website. When applying for samples, customers need to provide relevant information such as company name, contact person, contact information, and the model and specification of the required samples. The sales department will review the customer's application information. After the review is passed, the warehouse department will prepare the corresponding samples according to the customer's requirements.

The samples provided are consistent with the batch products in terms of materials, production processes, and performance indicators, ensuring that customers can truly understand the product quality. The samples are packaged in small wooden reels or cartons, with clear labels indicating the product model, specification, production date, and other information.

The company usually charges a certain sample fee, which can be deducted from the payment for subsequent bulk orders. The transportation cost of the samples is borne by the customer, or it can be negotiated between the two parties according to the actual situation. The samples are shipped through express or logistics companies, and the logistics information is timely fed back to the customer so that the customer can track the sample transportation status.

After the customer receives the samples, if they have any questions about the samples, the company's technical staff will provide professional answers and technical support to help customers better understand the products.

The company attaches great importance to after-sales service and has established a complete after-sales service system to provide customers with comprehensive and thoughtful after-sales support for XLPE insulated 310mm² and 38mm² copper power cables.

If the customer finds quality problems with the cables during use, such as insulation breakdown, sheath damage, or performance failure, they can contact the company's after-sales service department in a timely manner. The after-sales staff will record the customer's feedback information in detail, including the product model, specification, production batch, problem description, and usage environment.

After receiving the customer's feedback, the after-sales service department will respond within 24 hours. For simple problems, technical guidance and solutions will be provided to the customer through phone calls, emails, or online communication. For complex problems that require on-site handling, the company will arrange technical personnel to go to the site for inspection and treatment within a reasonable time according to the customer's location and the severity of the problem.

The company promises that for cables with quality problems caused by manufacturing defects within the warranty period (usually 12 months from the date of delivery), free replacement or repair services will be provided. For problems caused by improper use or man-made damage, the company will also provide repair services, and the relevant costs will be borne by the customer.

In addition, the after-sales service department regularly conducts follow-up visits to customers to understand the usage status of the cables and collect customer opinions and suggestions. This information is fed back to the production, R&D, and sales departments to continuously improve product quality and service levels.

The company also provides technical training services for customers. According to the customer's needs, technical personnel can be arranged to conduct on-site training for the customer's installation and maintenance personnel, including cable installation methods, precautions, maintenance skills, and other content, to help customers correctly use and maintain the cables, and improve the service life of the cables.

The company's after-sales service team is composed of experienced technical and service personnel who have professional knowledge and rich practical experience, and can provide customers with efficient and high-quality after-sales services. The goal of after-sales service is to solve customer problems in a timely manner, ensure the normal use of the cables, and enhance customer satisfaction and trust.