The Sheathed Power Cable (oxygen-free copper conductor, PVC insulated) 3240 + 1120 mm² has comprehensive and precise settings in terms of specification parameters to meet the stringent requirements of medium and high-voltage power transmission.

The conductor specification is 3240mm² + 1120mm², made of oxygen-free copper with a purity of ≥99.95% through a multi-strand compact stranding process. The DC resistance of the 3 main cores of 240mm² at 20℃ is ≤0.0779Ω/km, and that of the 1 neutral core of 120mm² is ≤0.158Ω/km, both far lower than the industry standard. This can minimize energy loss during power transmission and ensure efficient power transmission. The conductivity of oxygen-free copper is as high as 101% IACS (International Annealed Copper Standard), far exceeding that of ordinary Copper Conductors, providing strong support for scenarios with high conductivity requirements. Meanwhile, the tensile strength of the conductor is ≥240MPa, which can withstand tensile and bending stresses during laying, ensuring that it is not easily damaged in complex installation environments.

The insulation layer is made of high-density PVC (polyvinyl chloride) material. After optimization with a special formula, its temperature resistance level reaches 70℃, enabling it to operate stably for a long time in the environment of -15℃ to 70℃. Its volume resistivity is ≥10¹³Ω·cm, and the dielectric loss tangent is ≤0.03 (at 20℃), with stable insulation performance, which can effectively isolate the risk of leakage between cores. The insulation layer has passed the GB/T 18380.1-2008 flame retardant test, can self-extinguish when burning in open fire, and has a smoke density rating of ≤75, meeting the requirements of high-safety level places.

The overall structure of the cable adopts a "3+1" core design, adapting to the three-phase four-wire power distribution system. The sheath layer is made of weather-resistant PVC material with a thickness of ≥2.0mm, a tensile strength of ≥12MPa, and an elongation at break of ≥150%, which can resist the erosion of outdoor environments such as ultraviolet rays, wind and rain, and also has certain oil resistance and wear resistance, protecting the internal structure from mechanical damage. The outer diameter of the cable is about 68mm, and the minimum bending radius is 12 times the outer diameter (static), which is convenient for turning and laying in narrow spaces.

In terms of current-carrying capacity, the cable performs excellently. The current-carrying capacity of the main core reaches 450A when laid in air and 580A when laid underground, which can meet the high-power power transmission needs of scenarios such as large industrial motors and high-rise building main power distribution. In addition, the rated voltage of the cable is 0.6/1kV, which can adapt to the medium and high-voltage power transmission environment and ensure the stable operation of the power system.

The sheathed power cable (oxygen-free copper conductor, PVC insulated) 3240 + 1120 mm² has distinct uses in multiple fields due to its excellent performance.

In the industrial field, high-voltage distribution trunk lines in large industrial plants such as steel mills and chemical plants are inseparable from this cable. These plants have many equipment with large power, and have extremely high requirements for the stability and reliability of power transmission. The high current-carrying capacity and low resistance characteristics of this cable can ensure that power is efficiently transmitted from the transformer to the distribution cabinet, providing stable power for various large industrial motors, production lines and other equipment, and ensuring the continuous progress of production. At the same time, its Chemical Resistance can resist the erosion of acids, alkalis, oils and other chemical substances that may exist in the plant, prolonging the service life of the cable.

In super high-rise buildings, this cable plays a key role as the main cable of the vertical distribution shaft. Super high-rise buildings have large electrical loads and complex power distribution systems, and have strict requirements on the safety and space adaptability of cables. The "3+1" core design is adapted to the three-phase four-wire power distribution system, which can effectively balance the current and ensure stable power transmission between floors. The small bending radius allows it to be flexibly laid in narrow distribution shafts, saving space. The weather resistance of the sheath can cope with possible temperature and humidity changes in the building, ensuring the long-term stable operation of the cable.

Large data centers have extremely high requirements for the continuity and safety of power supply, and this cable is suitable for their backup Power Lines. Once the key equipment such as servers and network equipment in the data center is powered off, it will cause huge losses. The high reliability and stability of this cable can ensure that the backup power supply can timely and stably supply power to key equipment when the main power supply fails. Its flame retardant performance can also delay the spread of fire in emergency situations such as fires, buying time for data backup and equipment protection.

In addition, in large public facilities such as stadiums and convention centers, this cable can be used as the main power Distribution Cable to provide power support for lighting, air conditioning, audio and other equipment in the venue. These places are crowded with people and have various electrical equipment, so they have high requirements for the safety performance of cables. The flame retardant and low-smoke characteristics of this cable can ensure the safety of personnel and the normal operation of equipment. In some large outdoor projects, such as the power distribution systems of bridges and tunnels, the weather resistance and mechanical strength of this cable can also meet the needs of long-term outdoor use.

The conductor is made of oxygen-free copper with a purity of ≥99.95%. Due to its extremely low oxygen content, oxygen-free copper greatly reduces the obstruction of impurities to current conduction, making it have extremely high conductivity with a conductivity of up to 101% IACS, which can efficiently transmit power and reduce energy loss. At the same time, oxygen-free copper has good ductility and mechanical strength. After being processed by the multi-strand compact stranding process, the Flexibility of the conductor is further improved, facilitating bending and installation during laying and adapting to different wiring environments. In addition, oxygen-free copper has excellent corrosion resistance, and is not easy to reduce conductive performance due to oxidation during long-term use, prolonging the service life of the cable.

The insulation layer is made of high-density PVC (polyvinyl chloride) material, which has excellent insulation performance after optimization with a special formula. Its volume resistivity is ≥10¹³Ω·cm, which can effectively prevent current leakage and ensure the safety of power transmission. PVC material has good chemical stability, can resist the erosion of various chemical substances such as acids, alkalis and oils, and is suitable for complex environments such as industry and chemical industry. At the same time, the material has undergone flame retardant treatment, passed relevant flame retardant tests, can self-extinguish when burning in open fire, and has low smoke density, reducing the harm in case of fire.

The sheath layer is made of weather-resistant PVC material with a thickness of ≥2.0mm, which has good mechanical properties. With a tensile strength of ≥12MPa and an elongation at break of ≥150%, it can withstand certain mechanical impacts and wear, protecting the internal conductors and insulation layers of the cable from damage. It has strong weather resistance, can resist the impact of outdoor environmental factors such as ultraviolet radiation, wind and rain erosion, and is suitable for use in outdoor or humid, dusty environments. In addition, the sheath material also has certain oil resistance, and can adapt to industrial scenarios that may come into contact with oil.

The cable adopts a "3+1" core structure style. 3 main cores of 240mm² and 1 neutral core of 120mm² are twisted together, which is round overall with a compact structure. This design not only meets the needs of the three-phase four-wire power distribution system, but also effectively controls the overall size of the cable, facilitating laying and installation.

The appearance color of the cable is usually black. The black sheath is 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, certification mark and other information. These marks are printed with wear-resistant ink to ensure that they are clearly distinguishable during long-term use and transportation, facilitating users to identify and trace the product.

When the cable is packaged in coils, the coil diameter is large, usually customized according to actual needs to facilitate transportation and storage. During laying, it can be cut according to the on-site situation to meet the power distribution needs of different lengths.

The production process of the sheathed power cable (oxygen-free copper conductor, PVC insulated) 3240 + 1120 mm² is complex and rigorous. Each link from raw material processing to finished product inspection is strictly controlled to ensure product quality.

Conductor manufacturing is the primary link of production. First, oxygen-free copper ingots with a purity of ≥99.95% are smelted to remove impurities and oxygen, ensuring that the purity of copper meets the requirements. During the smelting process, it is necessary to accurately control the temperature and time to prevent oxidation 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 compactly stranded according to a certain stranding pitch and direction to make a single-core conductor. The compact stranding process can make the conductor structure compact, reduce the outer diameter, improve the filling coefficient of the conductor, and at the same time enhance the flexibility and mechanical strength of the conductor.

Insulation layer extrusion is one of the key processes. The stranded single-core conductor is fed into the extruder, and at the same time, high-density PVC material is added into the hopper of the extruder. The PVC 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 be cooled and shaped by a cooling system to ensure the dimensional stability of the insulation layer.

The cabling process is to strand 3 insulated main cores of 240mm² and 1 insulated neutral core of 120mm² according to a certain stranding method and pitch to form a cable core. During the cabling process, it is necessary to fill some inert materials, such as polypropylene rope, 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. At the same time, it is necessary to ensure that the positions of each core are uniform and the stranding is tight, so as to avoid loosening during transportation and use.

Sheath extrusion is carried out after cabling. The cabled core is fed into the sheath extruder, and weather-resistant PVC material is added into the extruder hopper. The material is heated and melted in the extruder, and then evenly wrapped around the outside of the cable core 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 ≥2.0mm, the surface is smooth, closely combined with the cable core, and free of bubbles, cracks and other defects. The extrusion of the sheath layer can not only protect the internal structure, but also enhance the weather resistance and mechanical properties of the cable.

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, flame retardant performance of the insulation layer are tested; the structure and size of the cabled core are checked; 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 is 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 the sheathed power cable (oxygen-free copper conductor, PVC insulated) 3240 + 1120 mm² 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 is usually 50 meters, 100 meters or customized according to customer needs. 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 the sheathed power cable (oxygen-free copper conductor, PVC insulated) 3240 + 1120 mm² 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, severe cold and strong wind to prevent the cable from being affected by extreme environments.

Railway transportation is suitable for long-distance and large-volume cable transportation, with the advantages of large transportation volume, good stability and relatively low cost. For railway transportation, the cable reel is loaded into the designated position of the railway freight car and fixed firmly with special fixing devices to ensure that it will 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.

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

No matter which transportation method is adopted, appropriate loading and unloading equipment such as forklifts and cr

anes should be used during loading and unloading. Manual rough handling is strictly prohibited to avoid damage to the cable reel or scratches and breakage of the cable sheath. During loading and unloading, it is necessary to lift and place gently, keep the cable reel stable, and avoid severe impact. Transport personnel should be familiar with the characteristics and transportation requirements of the cable, and operate in strict accordance with the operating procedures to ensure the safety of the cable during transportation.

The company has established a sound shipment process to ensure that the sheathed power cable (oxygen-free copper conductor, PVC insulated) 3240 + 1120 mm² can be sent to customers in a timely and accurate manner.

After a 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 the customer's 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 its accuracy and completeness. If any errors or omissions are found in the information, 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 model, 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 cable is found to have damaged packaging, blurred labels, scratches on the appearance, etc., it 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 will transfer the cables to the logistics department. The logistics department will contact the corresponding transportation company according to the transportation method required by the order and arrange for vehicles to pick up the goods. When handing over the cables to the transportation company, the logistics personnel will check the quantity, specification and packaging of the cables together with the person in charge of the transportation company, and sign the handover documents after confirmation. At the same time, the transportation precautions of the cables, such as avoiding inversion, moisture-proof, and gentle handling, will be informed to the transportation company.

The logistics department will track the transportation process of the goods and keep abreast of the transportation status of the goods. If problems such as transportation delays and goods damage are encountered, they will communicate with the transportation company in a timely manner to solve them and feed back the situation to the customer to ensure that the customer knows the latest situation of the goods. After the goods are delivered to the customer's designated location, the customer needs to inspect the cables and sign for confirmation after confirmation. The logistics department will retrieve the customer's signature documents as proof of completion of shipment.

In order to allow customers to better understand the performance and quality of the sheathed power cable (oxygen-free copper conductor, PVC insulated) 3240 + 1120 mm², the company provides sample services.

Customers can apply for samples from the sales department, indicating the model, specification and quantity of the required samples. After receiving the application, the sales department will communicate with the production department or warehouse department in a timely manner to arrange the preparation of samples. The preparation of samples is carried out in strict accordance with the product production standards to ensure that the performance and quality of the samples are consistent with the bulk products.

Samples are usually 1-5 meters long cable segments, with both ends sealed to prevent moisture and impurities from entering. The samples will be attached with detailed labels, indicating the product's model, specification, manufacturer, production date and other information. At the same time, product testing reports, instructions and other materials will be provided along with the samples to facilitate customers' testing and understanding.

The company usually charges a certain sample fee, which can be refunded after the customer places a formal order (the specific refund conditions can be negotiated between the two parties). The freight of the samples is usually borne by the customer, and the company can assist in arranging transportation. After the customer receives the samples, if they have any questions about the samples, the technical department and sales department of the company will provide professional answers and technical support to help customers better understand the product.

The company attaches great importance to after-sales service and has established a complete after-sales service system to provide customers with timely and effective support and solutions.

If the customer finds quality problems with the cable during use, such as insulation breakdown, conductor damage, sheath cracking, etc., they can contact the after-sales service department of the company in a timely manner. The after-sales staff will respond to the customer's feedback within 24 hours and understand the specific situation of the problem in detail, including the use environment, installation method, problem phenomenon, etc.

After understanding the situation, the after-sales staff will analyze the cause of the problem. If it is confirmed that the problem is caused by product quality, the company will provide solutions according to the actual situation, such as replacement, repair or refund. For large-scale projects, the company can also send technical personnel to the site to investigate and deal with the problem, and assist in solving the problem.

In addition to handling quality problems, the after-sales service department also provides technical consultation services. Customers can consult the after-sales staff on issues such as cable installation, maintenance, and use, and the after-sales staff will provide professional advice and guidance based on their professional knowledge and experience.

The company will also conduct follow-up visits to customers who have purchased products to understand the use of the products and collect customer opinions and suggestions. This helps the company to continuously improve product quality and service level, and enhance customer satisfaction and loyalty.

The warranty period of the product is usually 12-24 months from the date of delivery (specific warranty period can be agreed in the contract). During the warranty period, the company is responsible for repairing or replacing the products with quality problems caused by non-human factors. For problems caused by improper use, installation or maintenance by customers, the company can also provide paid maintenance services.

In general, the company's after-sales service aims to solve customer problems and ensure customer satisfaction, providing customers with a full range of support throughout the product use process.