The 1*240mm² cables in the U1000, R2V, and RO2V series have many highlights in their specification parameters, enabling them to adapt to the harsh requirements of medium and high-voltage power transmission.

In terms of conductors, high-purity electrolytic copper is used with a purity of over 99.95%. This high-purity material is the basis for its excellent conductive performance. The cross-sectional area of 240mm² provides a sufficient channel for high-current transmission, with a DC resistance of ≤0.075Ω/km, which is much lower than the industry average. This means that under the same transmission conditions, the cable has less current loss, which can significantly improve the efficiency of power transmission and reduce energy waste.

The rated voltage is one of the important parameters of the cable, covering the medium and high-voltage range, and can be stably applied to power systems of 1kV and above. This feature allows it to meet the needs of various high-voltage scenarios, whether it is power supply for large equipment in industrial production or trunk line transmission of urban power grids.

In terms of flame retardant performance parameters, the cable performs very well. It complies with strict national and industrial flame retardant standards, with an oxygen index of ≥32%, which is much higher than that of ordinary cables, indicating that it is not easy to burn in an oxygen-deficient environment. In flame tests, the flame spread speed is more than 50% lower than that of ordinary cables, and it can self-extinguish within 30 seconds after the fire source is removed, which can effectively prevent the fire from spreading along the cable. At the same time, the smoke concentration released during combustion is low, with a smoke density rating (SDR) of ≤60 and low toxicity, which can reduce the harm to personnel and equipment in case of fire.

The performance parameters of the insulation layer are also impressive. The long-term operating temperature of the XLPE insulation layer can reach 90℃, and in the case of short-term overload, the temperature can reach 130℃, which enables the cable to maintain stable performance when the power load fluctuates greatly. Its insulation resistance is ≥1000MΩ·km, such a high insulation resistance ensures that in complex environments such as high temperature and humidity, it can effectively block current and prevent electric leakage and short-circuit accidents.

The mechanical performance parameters of the PVC Sheath cannot be ignored, with a tensile strength of ≥14MPa and an elongation at break of ≥180%. This means that the sheath can withstand large tensile forces and deformations, and is not easy to be damaged when subjected to external mechanical impact and wear, thus providing reliable protection for the internal structure of the cable.

In addition, the bending radius of the cable is clearly specified, usually 12-15 times the outer diameter of the cable. This parameter provides an important reference for the laying and installation of the cable, ensuring that the cable will not be damaged due to excessive bending during installation.

The 1*240mm² U1000, R2V, and RO2V Cables, with their unique performance, have irreplaceable characteristic uses in many fields.

In the industrial field, the connection of large transformers is one of its important application scenarios. Large transformers are core equipment in industrial power systems and require stable and large-capacity power transmission. The large cross-section and high current-carrying capacity of this cable can meet the power exchange needs between the transformer and the power grid, ensuring the normal operation of the transformer. The blast furnace equipment in steel plants is a typical high-power electrical equipment, which requires continuous and stable high-current power supply during operation. The 1*240mm² cable can provide reliable power support for the smelting process of the blast furnace, ensuring the continuity of production. Large reaction devices in chemical plants have extremely high requirements for the stability of electricity. Any power interruption may lead to serious production accidents. This cable can stably transmit electricity in complex chemical environments, ensuring the safe operation of the reaction devices.

In urban power grid construction, the cable plays the role of "artery". The connection between substations requires large-capacity and high-reliability cables to achieve efficient distribution and transmission of electricity. The 1*240mm² cable can meet this demand, ensuring stable power supply in various areas of the city. Urban Underground Cable tunnels are an important part of the urban power grid, with a closed space and complex environment, which have high requirements for the safety and durability of cables. The flame retardant performance, insulation performance and mechanical performance of this cable make it an ideal choice for laying in underGround Cable tunnels, and it can maintain stable performance in long-term use.

The new energy field is also inseparable from the support of this cable. The grid-connected lines of large photovoltaic Power Stations need to transmit a large amount of electrical energy to the power grid, and the high current-carrying capacity of the 1*240mm² cable can adapt to the high-power output of photovoltaic power stations. The generator sets in wind farms are relatively scattered, and the environment is mostly in the wild with complex climate conditions. The weather resistance and reliability of this cable can ensure that the electricity generated by wind power is smoothly integrated into the power grid, improving the utilization efficiency of new energy.

In some special large-scale engineering projects, such as large stadiums and airport terminals, their internal power systems have large loads and high safety requirements. The 1*240mm² cable can be used for trunk line power transmission to provide stable power for lighting, air conditioning, elevators and other equipment in the venues, ensuring the normal operation of these large places.

The U1000, R2V, and RO2V 1*240mm² cables, in terms of material selection and style design, fully consider the needs of medium and high-voltage power transmission, striving for the perfect combination of performance and practicality.

The Conductor Material is high-purity electrolytic copper with a purity of over 99.95%. This high-purity copper has excellent conductive performance, which can transmit current quickly and efficiently, reducing energy loss. At the same time, copper has good ductility and toughness. In the processing process, it can be drawn into fine Copper Wires, and then formed into a 240mm² conductor through precision stranding. The multi-strand copper wire stranding style not only increases the Flexibility of the conductor, making it easier to bend and install during laying, but also improves the mechanical strength of the conductor, enabling it to withstand a certain tensile force and pressure and not easy to break.

The insulation layer is made of high-voltage resistant and aging resistant cross-linked polyethylene (XLPE) material. XLPE material forms a three-dimensional network molecular structure through cross-linking reaction, which makes it have excellent heat resistance, chemical corrosion resistance and electrical insulation performance. Compared with traditional polyethylene materials, XLPE has higher mechanical strength and can maintain stable performance at higher temperatures, which is suitable for medium and high-voltage power transmission scenarios. Its insulation performance is stable, which can effectively prevent current leakage and ensure the safety of power transmission.

The sheath is made of flame-retardant polyvinyl chloride (PVC) material, optimized through a special formula. PVC material itself has good mechanical properties and corrosion resistance. By adding flame retardants and other additives, its flame retardant performance and aging resistance are further improved. The sheath tightly wraps around the outside of the insulation layer, forming a strong protective barrier, which can resist external mechanical impact, wear, chemical corrosion, etc., and protect the internal insulation layer and conductor from damage.

From the overall style, the cable has a single-core structure, and the 1*240mm² specification clearly indicates its single-core design. The single-core structure has certain advantages in medium and high-voltage power transmission, reducing interference between multiple cores and helping to improve transmission efficiency. The appearance of the cable is usually black with a smooth surface, which is not only easy to identify but also can reduce friction resistance during laying.

Cables of different models may have some differences in material details to adapt to different use environments. For example, the sheath of RO2V cables may have better oil resistance, suitable for some industrial environments with oil pollution; U1000 Cables may be more prominent in weather resistance, suitable for long-term outdoor use.

The production process of U1000, R2V, and RO2V 1*240mm² cables is complex and precise, and each link is strictly controlled to ensure high quality of the products.

Conductor manufacturing is the first step in production, using multi-head wire drawing and precision stranding technology. First, high-purity electrolytic copper is made into copper rods. The quality of copper rods directly affects the performance of subsequent conductors, so during the production process, the purity and diameter of copper rods will be strictly tested. Then, the copper rod is drawn into multiple strands of fine copper wires through a multi-head wire drawing machine. During the wire drawing process, it is necessary to accurately control the drawing speed and tension to ensure that the diameter of the copper wire is uniform and the surface is smooth. Next, multiple strands of copper wires are precision stranded according to certain rules. During the stranding process, it is necessary to ensure that each strand of copper wire is arranged evenly and under uniform force, so as to avoid affecting the conductive performance and mechanical strength of the conductor due to local stress concentration. After stranding, the conductor will be annealed to eliminate internal stress and further improve its flexibility and conductive performance.

The insulation layer extrusion adopts advanced three-layer co-extrusion technology. This technology can extrude the inner semiconductor layer, insulation layer and outer semiconductor layer at the same time, making the three-layer structure closely combined and reducing interface defects. During the extrusion process, it is necessary to accurately control the temperature, pressure and extrusion speed. Temperature control is particularly critical. Different XLPE materials have their specific melting temperature ranges. Only at a suitable temperature can the material be fully melted to ensure that the extruded insulation layer is uniform and dense. The matching of pressure and extrusion speed can ensure that the thickness of the insulation layer is uniform, with a deviation controlled within ±0.1mm. After extrusion, the insulation layer needs to be cooled to make it solidify and form quickly, maintaining a stable structure.

The sheath extrusion process adopts a special mold design to ensure that the PVC material is closely combined with the insulation layer. The size and shape of the mold are carefully designed to enable the molten PVC material to evenly coat the outside of the insulation layer, forming a sheath layer without bubbles or gaps. During the extrusion process, the temperature and extrusion speed are also well controlled to make the thickness of the sheath layer meet the design requirements and have good mechanical properties. After extrusion, the sheath is cooled and solidified to make it firmly combined with the insulation layer, enhancing the sealing and mechanical strength of the overall structure.

During the production process, quality inspection runs through. Starting from the incoming inspection of raw materials, various performance indicators of electrolytic copper, XLPE, PVC and other raw materials are strictly tested to ensure that they meet the production requirements. In key links such as conductor stranding, insulation layer extrusion, and sheath extrusion, online testing equipment is equipped to monitor the size, appearance and other parameters of the product in real time. Once an abnormality is found, the production parameters are adjusted in time. The finished cables also need to undergo comprehensive offline testing, including more than 20 indicators such as voltage resistance test, partial discharge test, flame retardant performance test, and mechanical performance test. Only products that meet the relevant standards in all indicators can leave the factory.

In addition, the control of the production environment is also very important. The production workshop is kept clean and dry, and the temperature and humidity are controlled within an appropriate range to avoid dust, impurities, etc. affecting product quality. At the same time, production equipment is regularly maintained to ensure that it is in good operating condition, improving the stability and consistency of production.

The packaging design of U1000, R2V, and RO2V 1*240mm² cables fully considers the characteristics of the product and the needs of transportation and storage, aiming to maximize the protection of the cable quality during circulation.

The choice of packaging materials is very particular, using high-strength wooden reels. This kind of wooden reel has been specially treated, with high compressive and impact resistance, and can bear a single reel weight of more than 5 tons, providing solid support for the cable. The diameter of the reel is customized according to the length of the cable, usually 2-3 meters. This size design is not only convenient for winding the cable but also ensures stability during transportation and storage.

When the cable is wound onto the reel, professional winding equipment is used to ensure that the cable is arranged neatly and tightly, avoiding looseness and distortion. During the winding process, appropriate tension is maintained to fix the cable firmly on the reel, preventing friction and damage caused by shaking during transportation.

The protective measures on the outside of the reel are also in place. First, a layer of waterproof canvas is wrapped, which has good waterproof performance and can effectively block the intrusion of rain, moisture, etc. Outside the waterproof canvas, a layer of plastic film is wrapped to further enhance the moisture-proof and dust-proof effect. Through these two layers of protection, it can be ensured that the cable remains dry and clean during long-distance transportation and open-air storage, without being affected by the external environment.

For easy identification and traceability, detailed information is marked on the reel, including the cable's model, specification, length, rated voltage, production batch number, production date, implementation standard, manufacturer, etc. This information is clearly visible, facilitating customers to check when receiving and inspecting products, and also providing a basis for product quality traceability.

For exported cables, the packaging will be adjusted according to the requirements of the exporting country or region. For example, some countries have fumigation requirements for wooden packaging, so the wooden reels will be fumigated and corresponding fumigation certificates will be issued to meet local quarantine standards. At the same time, the labels on the packaging will add descriptions in English and other corresponding languages for the convenience of foreign customers' identification.

The transportation link of U1000, R2V, and RO2V 1*240mm² cables has strict specifications and processes to ensure that the cables can be delivered to the destination safely and timely.

The choice of transportation mode is comprehensively considered according to factors such as transportation distance, quantity, and customer requirements. For short-distance transportation with a small quantity, road transportation is usually adopted, using special freight vehicles. This kind of vehicle is equipped with appropriate fixing devices, which can firmly fix the cable reels in the carriage to prevent rolling and collision during transportation. The carriage of the vehicle is kept clean and dry, without sharp debris, to avoid damage to the cable packaging.

For long-distance transportation or large quantities of cables, railway transportation and waterway transportation are better choices. Railway transportation has the characteristics of large transportation volume and high stability, usually using boxcars or containers, which can provide good protection for cables and avoid being affected by external weather and environment. Waterway transportation is suitable for long-distance and large-volume transportation, and the cables are transported to the destination by cargo ships, with relatively low cost. When using railway or waterway transportation, additional fixing and protection will be carried out on the cable reels to ensure that there will be no damage during loading, unloading and transportation.

There are many precautions during transportation. First, a certain distance should be kept between the cable reels to avoid packaging deformation or cable damage caused by mutual extrusion. Secondly, it is strictly forbidden to mix cables with sharp objects and corrosive substances to prevent the cables from being scratched or corroded. During transportation, the cable should be avoided from being exposed to direct sunlight and rain and snow immersion. For road transport vehicles, a tarpaulin can be covered for protection; for railway and waterway transport containers or boxcars, it is necessary to ensure that they are tightly sealed.

Special personnel will be arranged to escort during transportation. The escorts are familiar with the characteristics of the cables and transportation requirements, and will regularly check the fixing of the cables and whether the packaging is intact. When encountering poor road conditions or bad weather, they will remind the driver to slow down to ensure transportation safety. At the same time, transportation records will be made, including transportation time, route, weather conditions, cable status and other information, so that problems can be traced in time when they occur.

After arriving at the destination, during the unloading process, special lifting equipment such as forklifts and cranes will be used, and rough unloading is strictly prohibited. When lifting, attention should be paid to uniform force to avoid tilting or collision of the reel, ensuring that the cable is unloaded safely.

The delivery process of U1000, R2V, and RO2V 1*240mm² cables is rigorous and orderly, and every link from order confirmation to goods delivery strives for accuracy and efficiency.

After the customer places an order, the sales department will promptly enter the order information into the system and transmit it to the production department and the warehousing department. The production department will check whether there are stock products according to the order requirements. If there is stock, it will notify the warehousing department to prepare for delivery; if there is no stock, it will arrange a production plan to ensure that the production is completed within the specified time.

After receiving the delivery notice, the warehousing department will find the corresponding cable products according to the order information. Before delivery, a strict outgoing inspection of the cable will be carried out to check whether the model, specification, length, production batch number, etc. of the cable are consistent with the order, check whether the packaging is intact, and whether the quality certification documents are complete. After passing the inspection, the cable will be marked for easy identification and tracking.

Pre-delivery preparations also include sorting out relevant documents, such as delivery notes, invoices, product quality certificates, inspection reports, etc. These documents will be sent together with the goods to facilitate customers to check and accept when receiving the goods.

When choosing a logistics company, priority will be given to enterprises with good reputation, strong transportation capacity and high service quality. A detailed transportation agreement will be signed with the logistics company

to clarify the rights and obligations of both parties, including transportation time, routes, cargo protection measures, and liability for breach of contract. The detailed information and transportation requirements of the cables are communicated to the logistics company to ensure that the logistics company can transport in accordance with the requirements.

Once the goods are dispatched, the sales department will promptly inform the customer of the delivery information, including the name of the logistics company, the waybill number, and the estimated arrival time. Customers can query the transportation status of the goods through the waybill number and keep track of the location and estimated arrival time of the goods at any time.

During the transportation of the goods, the sales department will maintain close communication with the logistics company to track the transportation progress of the goods. If there is a transportation delay or abnormal situation, they will promptly communicate and coordinate with the customer and the logistics company, and take corresponding measures to solve the problem to ensure that the goods can be delivered to the customer as soon as possible.

After the goods arrive, customers will be reminded to inspect them in a timely manner. If customers find any problems during the inspection, the sales department will respond promptly and coordinate relevant departments to handle them until the customer is satisfied.

To enable customers to better understand the performance and quality of U1000, R2V, and RO2V 1*240mm² cables, the company provides comprehensive sample services, allowing customers to conduct sufficient evaluations and tests before purchasing.

Customers can apply for samples through various channels, such as phone calls, emails, and online forms on the company's official website. When applying, it is necessary to provide detailed customer information, including company name, contact person, contact information, industry, estimated purchase quantity, as well as the model and specification of the required samples. This information helps the company understand the customer's needs and provide more suitable samples.

After receiving the sample application, the company will review it within 1-2 working days. If the review is passed, the preparation of the sample will be arranged. The length of the sample is usually 1-3 meters, which can meet the customer's needs for preliminary testing of the cable's appearance, size, material, and performance. If the customer has special requirements for the length of the sample, the company will try to meet them within a reasonable range.

The packaging of the sample is similar to that of the formal product, using small wooden reels or hard cartons to ensure that the sample is not damaged during transportation. The packaging will be marked with "Sample" as well as the model, specification, and production batch number of the sample for easy identification by the customer.

Samples are usually sent by express delivery, choosing courier companies with good service, fast speed, and wide coverage, such as SF Express and Deppon. The company will bear the express fee for the sample. For large customers with clear purchase intentions, samples will be provided free of charge; for ordinary consulting customers, a certain sample fee may be charged, which will be deducted from the payment when the customer makes subsequent bulk purchases.

After receiving the sample, if the customer needs to conduct relevant performance tests, the company can provide necessary technical support, such as providing test methods and standards. If the customer has any questions about the sample, the company's technical staff will answer them in a timely manner to help the customer better understand the product.

The company provides a complete after-sales service system for U1000, R2V, and RO2V 1*240mm² cables to ensure that customers can use the products with confidence and solve problems encountered in the process in a timely manner.

The warranty period of the cable is 24 months from the date of leaving the factory. During the warranty period, if the product has quality problems due to manufacturing defects, such as conductor breakage, insulation layer aging and cracking, and unqualified flame retardant performance, the company will provide free repair, replacement, or return services. Customers need to provide purchase vouchers and relevant proof of product quality problems, and the company will send technical personnel to verify the situation after receiving the feedback.

In terms of installation guidance, the company's technical team can provide professional on-site installation guidance services for large-scale engineering projects. Before installation, technical personnel will communicate with the construction team to understand the installation environment and requirements, and formulate a reasonable installation plan. During the installation process, they will supervise the installation quality on-site, guide the construction personnel to operate in accordance with the specifications, and avoid damage to the cable due to improper installation.

If the customer encounters any problems during the use of the cable, such as abnormal heating, insulation failure, etc., they can contact the company's after-sales service hotline at any time. The after-sales staff will record the problem in detail and arrange technical personnel to respond within 24 hours. For problems that can be solved through remote guidance, technical personnel will provide solutions by phone or email; for problems that require on-site handling, the company will dispatch technical personnel to the site for treatment as soon as possible.

The company also regularly conducts return visits to customers. For customers who have purchased the cable for a period of time, the after-sales staff will contact them to understand the use of the cable, collect customer opinions and suggestions on the product and service, and provide relevant maintenance and maintenance guidance according to the use of the cable. Through return visits, the company can continuously improve product quality and service level, and establish long-term and stable cooperative relations with customers.

In addition, the company has established a complete customer file system, which records the customer's purchase information, product model, specification, use environment, after-sales service records, etc. This helps the company track the entire life cycle of the product, provide targeted services for customers, and quickly respond to customer needs when problems arise.