1. Conductor Material: The conductor of the cable is made of high-purity copper with a purity of more than 99.9%. High-purity copper has excellent conductivity, which can effectively reduce losses during power transmission and ensure efficient and stable power transmission. At the same time, copper has good ductility and mechanical strength, so that the conductor is not easy to break during processing and use, and can adapt to the requirements of various laying environments.

2. Insulation layer material: The insulation layer is composed of mica tape and cross-linked polyethylene (XLPE). Mica tape is a high-performance inorganic insulating material with strong high temperature resistance. It can maintain stable insulation performance in high temperature environments above 700℃, and can play a role for a long time even in fire. XLPE has excellent electrical insulation performance and mechanical strength, which can enhance the overall insulation effect of the cable and its resistance to stretching and extrusion. The composite combination of the two makes the insulation layer have excellent fire and high temperature resistance, as well as good electrical and mechanical properties.

3. Outer layer material: The outer layer is made of halogen-free low smoke (LSHF) material. This material does not contain halogen, and will not release toxic and harmful gases such as hydrogen chloride when burned, which can reduce harm to human body and equipment. At the same time, it produces very little smoke when burned, with high light transmittance, which is conducive to personnel evacuation and rescue work in case of fire. LSHF material also has good corrosion resistance and wear resistance, which can protect the internal structure of the cable from external environment erosion and prolong the service life of the cable.

4. Style: The cable has an overall circular structure, with various layers of materials closely combined and stable structure. The circular structure is convenient for realizing uniform wrapping of various layers of materials during production, ensuring the consistency of cable performance. During laying, the circular structure can better adapt to laying methods such as pipes and cable trays, reducing laying resistance. The appearance color of the cable is usually black or gray, with a smooth surface and clear marks, indicating important information such as the model, specification, rated voltage and flame retardant grade of the cable, which is convenient for users to identify and select.

1. Conductor production: First, the high-purity copper raw material is smelted to remove impurities, obtaining copper liquid that meets the purity requirements. Then, the copper liquid is made into copper rods through continuous casting process, and the diameter of the copper rods is precisely controlled according to the specifications of the Cable Conductor. Next, wire drawing equipment is used to draw the copper rods into multiple fine Copper Wires. During the wire drawing process, the drawing speed and tension are strictly controlled to ensure the dimensional accuracy and mechanical properties of the copper wires. After that, multiple fine copper wires are stranded in a certain way to form a conductor with a cross-sectional area of 240mm². During the stranding process, it is necessary to ensure uniform and tight stranding to enhance the mechanical strength and conductivity of the conductor.

2. Mica tape wrapping: Outside the produced conductor, a special wrapping equipment is used to uniformly wrap the mica tape. When wrapping, the tension and wrapping angle of the mica tape should be controlled to ensure that the mica tape is closely attached to the conductor without wrinkles or overlaps. The number of wrapping layers is determined according to the flame retardant grade requirements, generally 2-4 layers. The wrapping of mica tape is a key process to ensure the fire resistance of the cable, and the quality must be strictly controlled.

3. XLPE insulation extrusion: Outside the conductor wrapped with mica tape, a layer of uniform cross-linked polyethylene (XLPE) insulation is extruded through an extruder. During the extrusion process, the extrusion temperature, speed and pressure are precisely controlled to make the XLPE material uniformly coat the outer layer of the mica tape, forming a tightly combined insulation structure. The extruded insulation layer needs to be cross-linked, usually by means of high-temperature and high-pressure steam cross-linking, so that the XLPE molecules form a three-dimensional network structure, enhancing its mechanical strength, temperature resistance and insulation performance.

4. Halogen-free low smoke outer layer extrusion: A halogen-free low smoke (LSHF) outer layer is extruded outside the XLPE insulation layer. The Insulated Wire core is sent to the outer layer extruder, and the LSHF material is uniformly coated on the surface of the insulation layer through a special mold. During the extrusion process, the process parameters are strictly controlled to ensure that the sheath layer has uniform thickness, smooth surface and is closely combined with the insulation layer. The extrusion temperature and time of LSHF material need to be precisely controlled to ensure that its performance meets the design requirements.

5. Quality inspection: Strict quality inspection is required in all links of the production process. The diameter, resistance, tensile strength, etc. of the conductor are tested to ensure that they meet the specification requirements. The quality of mica tape wrapping is controlled through appearance inspection and thickness measurement. The XLPE insulation layer is tested for thickness, insulation resistance, voltage resistance performance, etc. The halogen-free low smoke outer layer is tested for thickness, tensile strength, flame retardant performance, smoke density and halogen acid gas emission, etc. Finally, the overall performance test of the finished cable is carried out, including flame retardant test, temperature resistance test, bending test, etc., to ensure that all performance indicators of the cable meet relevant standards and design requirements.

1. Packaging materials: Due to its importance and particularity, the cable uses high-strength wooden cable reels or steel cable reels as packaging materials. The wooden cable reels are made of high-quality hardwood, which has been anti-corrosion and moisture-proof treated, with sufficient strength and toughness to bear the weight of the cable and the impact during transportation. The steel cable reels are welded with high-strength steel, and the surface is rust-proof treated, with stronger bearing capacity, suitable for long-distance transportation and packaging of large cables.

2. Packaging method: The cable is neatly wound on the cable reel. During the winding process, the tension is controlled to avoid loosening, twisting or mutual friction of the cable, which may cause damage. The two ends of the cable are sealed with special sealing sleeves to prevent moisture, dust, etc. from entering the inside of the cable. On the side of the cable reel, eye-catching words and signs are used to mark the model, specification, length, weight, manufacturer, production date, flame retardant grade, implementation standard and other information of the cable, which is convenient for users to identify and accept. For exported products, corresponding international certification marks and English descriptions are also marked.

3. Packaging requirements: The packaging must be firm and reliable, and can effectively protect the cable from damage during transportation and storage. The size of the cable reel should match the length and weight of the cable, which is convenient for hoisting, transportation and storage. During the packaging process, a layer of waterproof and moisture-proof plastic film will be covered on the outside of the cable reel to further protect the cable from the external environment. At the same time, the packaging must comply with relevant transportation standards and regulations to ensure transportation safety.

1. Transportation methods: According to the transportation distance, quantity and customer needs, road transportation, railway transportation or water transportation can be selected. Road transportation has high Flexibility, is suitable for short-distance transportation and door-to-door service, and can quickly deliver the cable to the destination, which is more suitable for customers with urgent needs. Railway transportation has large capacity, relatively low cost and good stability, and is suitable for medium and long-distance, large-volume cable transportation. Water transportation is suitable for long-distance transportation and exported products, especially for customers in coastal areas, which can reduce transportation costs, but the transportation time is relatively long.

2. Transportation precautions: During transportation, the cable reel must be placed horizontally, and it is strictly forbidden to invert or tilt to prevent the cable from sliding off the reel and causing damage. When loading and unloading the cable, special hoisting equipment is used, and the hoisting point should be located at the axis of the cable reel to avoid deformation of the cable reel or damage to the cable due to improper hoisting. During transportation, the cable should be avoided from severe impact, vibration and extrusion. The vehicle or transport tool should run smoothly and try to avoid bumpy roads. At the same time, it is necessary to take moisture-proof, sun-proof, high-temperature-proof and anti-corrosion measures to prevent the cable from being affected by rain, direct sunlight, high-temperature environment and corrosive substances. During transportation, fire prevention measures should also be taken, and smoking or using open flames on the transport tool is strictly prohibited.

3. Transportation time: The transportation time depends on the transportation method and distance. Road transportation can generally arrive within 1-5 days, and the specific time depends on the transportation distance and road conditions; railway transportation usually takes 3-10 days, which is affected by railway lines and scheduling; water transportation takes a longer time, with domestic transportation generally taking 7-15 days, and international transportation may take several weeks or even months depending on the route and port conditions.

1. Delivery process: After the customer places an order, the sales department will timely confirm the order information with the customer, including product model, specification, quantity, delivery date, delivery location, etc. After confirmation, the order information is transmitted to the production department or warehouse. If production is needed, the production department will organize production according to the order requirements to ensure completion within the specified time. The warehouse will prepare goods according to the order and re-inspect the quality of the stored cables to ensure that the product quality meets the requirements. After the products are ready, packaging and transportation are arranged, a suitable logistics company is selected, and a transportation contract is signed with the logistics company to clarify the rights and obligations of both parties. After shipment, the shipment information will be promptly notified to the customer, including the name of the logistics company, waybill number, estimated arrival time, etc., to facilitate the customer to track the transportation status of the goods.

2. Delivery time: For products in stock, delivery will be completed within 3-5 working days after the order is confirmed. For products that need to be produced, according to the production cycle, production and delivery will generally be completed within 10-15 working days. In case of special circumstances such as raw material shortage and equipment failure that may cause delivery delay, the company will communicate with the customer in advance, explain the reasons and negotiate a solution to ensure that the customer's interests are not affected.

3. Delivery location: The company has warehouses and production bases in many major cities across the country. The nearest delivery location will be selected according to the customer's geographical location to shorten the transportation time and reduce transportation costs. For exported products, they will be shipped from the nearest port to facilitate customs declaration and export transportation of the goods.

1. Sample provision: To enable customers to better understand the quality and performance of the product, the company can provide samples. Customers can make sample requests to the company by phone, email, online platform, etc., indicating the model, specification and other information of the required samples. After receiving the sample request, the company will arrange the production of samples or retrieve them from the inventory within 5-7 working days, and send them to the customer by safe and reliable express.

2. Sample cost: The cost of samples is borne by the customer, including the production cost, packaging cost and mailing cost of the samples. For customers with large order intentions or long-term cooperative customers, the company can reduce or exempt part or all of the sample costs, which can be negotiated with the company's sales staff. The sample cost can be deducted in subsequent orders according to the agreement.

3. Sample description: The provided samples are completely consistent with the mass-produced products in terms of material, structure, performance, etc., and can truly reflect the quality status of the products. The sample will be marked with the model, specification, production batch and other information of the product, which is convenient for customers to test and inspect. After receiving the sample, customers can test the appearance, size, flame retardant performance, electrical performance, etc. of the sample, and can communicate and feedback with the company in a timely manner if any problems are found.

1. Quality assurance: The company promises that the quality guarantee period of this cable is 36 months from the date of shipment. Within the quality guarantee period, if the product fails or is damaged due to its own quality problems, after being tested and confirmed by the company's technical personnel, the company will be responsible for free repair or replacement. If the product problem is caused by improper use, incorrect installation, man-made damage, etc. by the customer, the company will provide paid maintenance services and charge the corresponding material cost and working hour fee.

2. Technical support: The company has a professional technical team to provide customers with comprehensive technical support. Customers can consult the technical team through phone, email, online consultation and other ways when encountering problems in product selection, installation, use, maintenance, etc. Technical personnel will reply within 24 hours and provide professional solutions and technical guidance. For complex technical problems, technical personnel can be arranged to guide on site.

3. After-sales service response: If customers find product quality problems or need after-sales service during use, they can contact the after-sales service department through the company's customer service hotline, email and other channels. After-sales service personnel will get in touch with the customer within 2 hours after receiving the feedback to understand the details of the problem and register it. For general problems, a solution will be given within 4 hours; for problems that need on-site handling, technical personnel will be arranged to arrive at the site for processing within 24-72 hours according to the distance from the customer's location.

4. Return and exchange policy: Within the quality guarantee period, if the product is confirmed to have quality problems after testing, the customer can put forward a return or exchange application. The customer needs to provide relevant materials such as purchase vouchers, product photos and test reports. The company will review within 5 working days after receiving the application. After approval, the company will arrange return or exchange and bear the relevant transportation costs. For returns and exchanges due to non-quality problems, such as incorrect model selection by the customer, the customer needs to bear the round-trip transportation costs of the product and a certain handling fee. The specific fee standard can be negotiated with the company.

5.

Customer feedback: The company attaches great importance to customers' feedback and has set up a number of customer feedback channels, such as customer service hotline, email, online message board, etc. Customers can put forward opinions and suggestions on product quality, service attitude, delivery speed, etc. The company will arrange special personnel to sort out and analyze the customer feedback regularly, and formulate improvement measures for the existing problems to continuously improve product quality and service level and enhance customer satisfaction.