I. Core Information of the Product Itself
(I) Analysis of Specification Parameters
The specification parameters of low-voltage copper flame-retardant and fire-resistant
Power Cables (100, 150, 250, 300, 350 Mcm) are crucial for their stable operation in high-safety-demand scenarios, with each parameter undergoing precise design and rigorous testing.
Voltage Level: The rated voltage of this series of cables is usually 0.6/1kV, which enables them to perfectly adapt to AC 50Hz/60Hz low-voltage power grids. Among them, 0.6kV is the rated voltage between the core and the ground or the shielding layer, and 1kV is the rated voltage between cores. This design ensures that the cables can not only efficiently transmit power but also guarantee electrical safety in low-voltage distribution systems of high-rise buildings, hospitals, data centers, and other places, meeting the power transmission needs of high-power equipment clusters and main distribution lines.
Conductor Specifications:
100 Mcm (approximately 50mm²): The conductor is made of high-purity copper with a purity of ≥99.95% through a compact stranding process. The DC resistance at 20℃ is ≤0.383Ω/km, and the current-carrying capacity is about 190A, which can meet the power supply requirements of medium-sized motors and other equipment.
150 Mcm (approximately 76mm²): It also uses high-purity copper with a purity of ≥99.95%, processed by the compact stranding process. The DC resistance at 20℃ is ≤0.253Ω/km, and the current-carrying capacity is about 240A, suitable for power supply of larger branch lines.
250 Mcm (approximately 126mm²): High-purity Copper Conductor, with improved structural stability through the compact stranding process. The DC resistance at 20℃ is ≤0.151Ω/km, and the current-carrying capacity is about 320A, which can be used as the main distribution line for small and medium-sized building groups.
300 Mcm (approximately 152mm²): The conductor has a purity of ≥99.95%, and the conductivity efficiency is higher after compact stranding. The DC resistance at 20℃ is ≤0.126Ω/km, and the current-carrying capacity is about 360A, which can meet the power transmission of large equipment clusters.
350 Mcm (approximately 178mm²): High-purity copper conductor is made through compact stranding. The DC resistance at 20℃ is ≤0.108Ω/km, and the current-carrying capacity can reach 420A, which can be used as the main distribution line for large building groups to support the stable operation of high-power equipment.
Insulation Layer Parameters: The insulation layer is made of cross-linked polyethylene (XLPE) with a temperature resistance of 90℃, formed by a three-layer co-extrusion process. The insulation thickness of cables with different specifications varies. The insulation thickness of 100 Mcm cables is about 2.0mm, 150 Mcm is about 2.5mm, 250 Mcm is about 3.0mm, 300 Mcm is about 3.5mm, and 350 Mcm is about 4.5mm, increasing with the specification. The volume resistivity of the XLPE insulation layer is ≥1×10¹⁴Ω·cm, which has excellent electrical insulation performance and can withstand an ambient temperature difference of -40℃ to 90℃, maintaining a stable insulation effect in various complex environments.
Sheath Layer Parameters: It adopts a low-smoke zero-halogen flame-retardant polyolefin (LSZH) sheath, which passes the flame-retardant test of GB/T 19666 or IEC 60332 standards. The sheath thickness varies according to different specifications, with 100-150 Mcm being about 1.8mm and 250-350 Mcm being about 2.2mm. This sheath has good flame-retardant performance, with a flame spread rate of ≤0.5m/min. When burning, it has low smoke emission (light transmittance ≥60%) and no toxic gas release, which can reduce harm to personnel and equipment in case of fire.
Armoring Layer Parameters (Some Models): Some models of cables are added with
Steel Tape armoring on the outer layer, with an armoring thickness of about 0.5-0.8mm. The armoring layer increases the mechanical impact resistance of the cable by 40%, which can effectively resist external mechanical damages such as collision and extrusion, adapting to complex laying scenarios such as underground and pipe threading, and prolonging the service life of the cable.
(II) Characteristics and Core Advantages
Low-voltage copper flame-retardant and fire-resistant
Power Cables (100, 150, 250, 300, 350 Mcm) have significant characteristics and core advantages in high-safety-demand fields due to their unique performance.
1. Excellent Conductivity: With high-purity copper (purity ≥99.95%) as the conductor core, combined with the compact stranding process, the DC resistance of the conductor is greatly reduced, ensuring low loss during power transmission. Cables of different specifications have a wide range of current-carrying capacities, which can meet different power needs from small and medium-sized equipment to main lines of large building groups, ensuring efficient and stable power transmission.
2. Excellent Flame-Retardant and Fire-Resistant Performance: This is the core advantage of this series of cables. In terms of flame retardancy, the low-smoke zero-halogen flame-retardant polyolefin (LSZH) sheath is used, which passes relevant standard tests. It has a slow flame spread rate, low smoke emission, and no toxic gas release, which can effectively delay the spread of fire and reduce the harm of fire to personnel and equipment. The fire resistance meets GB/T 19216.21 or IEC 60331 standards, and can maintain circuit integrity for more than 3 hours in 950℃-1000℃ flames, ensuring the normal operation of the
Emergency Power Supply system in case of fire, and gaining valuable time for personnel evacuation and equipment rescue.
3. Good Environmental Adaptability: The insulation layer is made of XLPE material with a temperature resistance of 90℃, which can withstand an ambient temperature difference of -40℃ to 90℃ and work stably in different climatic conditions such as cold and hot. At the same time, the cable has good corrosion resistance and aging resistance, and can adapt to complex environments such as humidity and dust, suitable for various laying scenarios.
4. Strong Mechanical Performance: The steel tape armoring layer added to some models significantly improves the mechanical impact resistance of the cable, enabling it to withstand various mechanical stresses during laying and use, such as collision, extrusion, and stretching, ensuring the structural integrity and performance stability of the cable.
(III) Characteristic Uses and Application Scenarios
With its excellent performance, this series of cables is widely used in many fields with strict requirements for fire safety.
1. High-Rise Buildings: 100-150 Mcm cables are often used in branch lines of high-rise buildings, such as strong current lines in residents' homes and corridor lighting lines. 250-350 Mcm cables serve as the main distribution lines of the building, supplying power to large equipment such as elevators, central air conditioners, and fire protection systems in the entire building. In case of fire, their flame-retardant and fire-resistant performance can ensure emergency power supply, ensuring the normal operation of personnel evacuation and fire-fighting facilities.
2. Hospitals: Hospitals have extremely high requirements for the reliability and safety of electricity. 100-150 Mcm cables are suitable for branch lines such as power supply for medical equipment in wards and lines in nurse stations. Cables with specifications of 250 Mcm and above can be used as the main distribution lines of hospitals, providing stable power for equipment in key departments such as operating rooms and intensive care units. Its low-smoke zero-halogen characteristic can reduce the release of toxic gases in case of fire, protecting the safety of patients and medical staff.
3. Data Centers: Servers and other equipment in data centers require continuous and stable power supply. 250-350 Mcm cables can be used as the main distribution lines in computer rooms to meet the power needs of a large number of equipment. In case of fire, the fire resistance of the cable can ensure the normal operation of the emergency power supply system, reducing the risk of data loss and equipment damage.
4. Subways: The environment in subway tunnels is complex, and there are high requirements for the flame-retardant, fire-resistant, and mechanical impact resistance of cables. 350 Mcm cables can be used in emergency circuits of subway tunnels to support the power supply of emergency lighting systems, ventilation equipment, etc. Its armoring layer can resist vibration and mechanical impact caused by train operation, ensuring stable power transmission in emergency situations.
5. Large Shopping Malls: Large shopping malls have dense personnel and numerous electrical equipment. 100-150 Mcm cables can be used for branch lines such as lines in shops and lighting in public areas. 250-350 Mcm cables serve as the main distribution lines of the shopping mall, supplying power to air conditioners, elevators, fire protection systems, etc. Their flame-retardant performance can delay the spread of fire in the early stage of a fire, creating conditions for personnel evacuation.
(IV) Production Process and Quality Control
The high quality of low-voltage copper flame-retardant and fire-resistant power cables (100, 150, 250, 300, 350 Mcm) stems from advanced production processes and strict quality control procedures.
1. Conductor Manufacturing Process: High-purity copper ingots are selected and made into copper rods through smelting, rod casting, and other processes. The copper rod is drawn into a single wire of the required diameter by a wire drawing machine. During the wire drawing process, the diameter and tolerance of the single wire are strictly controlled to ensure uniform quality of the single wire. Then, the compact stranding process is used to strand multiple single wires into a conductor. By precisely controlling the stranding pitch and pressure, the conductor structure is made compact, the filling coefficient is improved, the skin effect is reduced, and the conductivity is enhanced. The
Stranded Conductor is annealed to eliminate internal stress and enhance
Flexibility and conductivity.
2. Insulation Layer Extrusion Process: Three-layer co-extrusion equipment is used for the extrusion of the insulation layer, that is, the conductor shielding layer, insulation layer, and insulation shielding layer are extruded at the same time. This process can ensure that the layers are closely combined, reduce interface defects, and improve insulation performance. Before extrusion, the XLPE material needs to be dried to remove moisture. During the extrusion process, parameters such as temperature, speed, and pressure are precisely controlled to ensure that the insulation layer thickness is uniform and meets the requirements of different specifications. The extruded insulation layer undergoes a cross-linking reaction through a cross-linking tube to form a stable three-dimensional network structure, improving the temperature resistance and mechanical properties of the insulation layer.
3. Sheath Layer Extrusion Process: Low-smoke zero-halogen flame-retardant polyolefin (LSZH) material is selected as the sheath material and dried before extrusion. The sheath material is coated on the insulation layer or armoring layer by an extruder, and the extrusion parameters are controlled to ensure that the sheath layer has uniform thickness, a smooth surface, and no defects such as bubbles and cracks. The extrusion of the sheath layer should ensure close combination with the inner structure to form good protection.
4. Armoring Process (Some Models): For cables that need to be added with steel tape armoring, a fully automatic armoring machine is used for armoring. The steel tape is wrapped around the sheath layer at a certain angle and pitch, and the tension of the steel tape is controlled to ensure that the armoring layer is tight and flat, without looseness, wrinkles, or other phenomena. After armoring is completed, the armoring layer is subjected to anti-corrosion treatment to improve its corrosion resistance.
5. Quality Control Process: From the purchase of raw materials, strict inspections are carried out on copper ingots, XLPE
Insulation Materials, LSZH sheath materials, etc., and only qualified raw materials can enter the production process. During the production process, quality control points are set for each process to inspect semi-finished products, such as conductor diameter, DC resistance, insulation layer thickness, sheath layer thickness, etc. Finished cables need to pass more than 20 tests such as power frequency withstand voltage (3kV/5min without breakdown), partial discharge (≤10pC), fire resistance combustion, and flame retardant performance. Each batch of products is accompanied by a detailed test report to ensure that the product quality meets relevant standards and requirements.
II. General Product Information
(I) Packaging Standards
To ensure that low-voltage copper flame-retardant and fire-resistant power cables (100, 150, 250, 300, 350 Mcm) are not damaged during transportation and storage, strict packaging standards are adopted.
1. Cable Reels: Cables are wound on sturdy steel reels, and the size of the reels is designed according to the specifications and length of the cables. The diameter and width of the reels can ensure that the cables are neatly wound, avoiding loosening and mutual friction during transportation. Both sides of the reel are provided with high-strength flanges, and the thickness and strength of the flanges are calculated to withstand the weight of the cable and the impact force during transportation, preventing the reel from deformation.
2. Fixing and Protection: After the cable is wound on the reel, high-strength steel strips are used to fasten the cable on the reel to prevent the cable from sliding during transportation. The outer layer of the cable is wrapped with a moisture-proof film to play a role in moisture-proof and wear-proof, protecting the sheath layer of the cable from damage. For exported or long-distance transported cables, wooden or metal protective boxes are added outside the reels to further enhance the protective effect and avoid collision and extrusion of the reels.
3. Identification Information: Relevant product information is clearly marked on the sides and ends of the reel, including product name, model specifications (100, 150, 250, 300, 350 Mcm), length, weight, production batch number, execution standard, production date, manufacturer name, address, and contact information, etc. This identification information is convenient for customers to quickly identify the product when receiving and inspecting the goods, and also facilitates product traceability and quality tracking.
(II) Transportation and Storage Specifications
1. Transportation Requirements:
Road Transportation: Use special freight vehicles, such as flatbed trucks or box trucks. When loading cable reels, ensure that the reels are placed stably and firmly fixed on the vehicle with steel wire ropes or chains to prevent rolling, tilting, or collision during transportation. During transportation, abide by traffic rules, avoid violent operations such as sudden braking and sharp turns, and reduce the impact on the cable. During long-distance transportation, regularly check the fixing of the reels and handle problems in a timely manner.
Railway Transportation: Select appropriate railway freight cars, place the cable reels reasonably, and leave sufficient gaps between the reels to avoid mutual extrusion. Use special fixing devices to fix the reels in the carriage to prevent movement due to vibration during train operation.
Sea Transportation: For cables transported by sea, place the reels in a ventilated and dry cargo hold to avoid moisture. Place moisture-proof materials under the reels and fix them to the fixed points of the cabin with ropes to prevent displacement or collision due to 颠簸 during ship navigation. At the same time, take rainproof and moisture-proof measures to avoid the cable being soaked in water.
2. Storage Conditions:
Storage Site: Choose a dry, ventilated, cool warehouse without corrosive gases and dust. The ground of the warehouse should be flat and solid, preferably with a moisture-proof layer to prevent ground moisture from eroding the cable. Avoid direct sunlight in the warehouse and keep away from heat sources (such as heating, stoves, etc.) to prevent aging of the cable sheath and insulation layer.
Storage Method: Cable reels should be stored vertically, not horizontally, to prevent reel deformation or cable extrusion. Keep a certain distance between reels, generally not less than 0.5 meters, to facilitate ventilation and handling. For cables stored for a long time, regularly turn them to change the stress points of the cables and prevent deformation or insulation layer aging due to long-term standing.
Temperature and Humidity Control: The temperature in the warehouse is controlled between -15℃ and 40℃, and the relative humidity does not exceed 75%. Install thermometers and hygrometers to regularly monitor the temperature and humidity changes in the warehouse. If necessary, take ventilation, dehumidification, and other measures to ensure that the storage environment meets the requirements.
Time Limit Requirements: The storage period of the cable is generally 2 years. Cables that exceed the storage period must be sampled and inspected before use, including insulation resistance testing and appearance inspection, and can only be used after passing the inspection to ensure that the performance of the cable meets the use requirements.
(III) Delivery and Shipment Process
1. Order Processing: After the customer places an order, the sales staff communicates with the customer in a timely manner to confirm information such as product model specifications, quantity, delivery date, delivery location, and transportation method, and signs a formal sales contract. The contract clarifies the rights and obligations of both parties, including product quality standards, prices, payment methods, and liability for breach of contract. The production department formulates production plans and arranges production schedules according to order requirements to ensure production is completed within the specified delivery period.
2. Stock Preparation and Inspection: Before shipment, warehouse managers retrieve the corresponding cable products from the inventory according to the order information or notify the production department to send newly produced cables to the warehouse. Quality inspectors conduct a comprehensive inspection of the cables to be shipped, including checking model specifications, length, appearance, packaging, and accompanying documents (such as test reports and certificates of conformity) to ensure they are consistent with the order requirements and meet quality standards.
3. Logistics Arrangement: Based on the customer's delivery location and requirements, select the appropriate transportation method. Domestic transportation usually adopts road or railway transportation, while export transportation uses sea or air transportation. Sign a transportation contract with the logistics company to clarify the responsibilities of both parties during the transportation of goods, ensuring that the goods can be delivered safely and on time. At the same time, timely inform the customer of logistics information, including the logistics company name, transportation vehicle information, and estimated arrival time.
4. Shipment Notification: After the goods are shipped, the sales staff immediately sends a shipment notice to the customer, which includes the logistics tracking number, transportation method, estimated arrival time, etc., to facilitate the customer to query the transportation status of the goods. Meanwhile, send the product's test report, certificate of conformity, and other documents to the customer by email or courier.
5. Delivery and Acceptance: When the goods arrive at the customer's designated location, the customer or their agent conducts on-site acceptance. The acceptance content includes whether the quantity and model specifications of the goods are consistent with the order, whether the packaging is intact, and whether the appearance of the cable is damaged. If any problems are found, the customer should contact the sales staff in a timely manner and provide relevant photos and evidence. After passing the acceptance, the customer signs on the delivery note to confirm the delivery. For problems found during acceptance, handle them in accordance with the contract agreement, such as return, replacement, or replenishment.
(IV) Sample Services
To help customers better understand the performance and quality of low-voltage copper flame-retardant and fire-resistant power cables (100, 150, 250, 300, 350 Mcm), the following sample services are provided:
1. Sample Provision: Customers can apply for samples from sales staff. The company provides 1-5 meters of free samples (limited to 1-2 specifications) according to customer needs, and the model specifications of the samples are consistent with bulk products. The customer bears the freight for the samples. For customers with long-term cooperation intentions, part or all of the freight can be negotiated.
2. Sample Customization: If customers have special needs, such as specific sheath colors and armoring methods, the company can provide customized sample services. Customers need to provide detailed technical parameters and requirements, and the technical department designs and produces samples according to customer needs. Customized samples may require a certain mold fee and processing fee, and the specific fee is determined through negotiation between both parties.
3. Sample Testing Support: The company provides customers with relevant technical data and test reports of samples, including parameters such as conductor resistance, insulation thickness, flame-retardant performance, and fire-resistant performance. If customers need to send samples to third-party testing institutions for testing, the company can provide necessary cooperation and support, such as providing product technical parameters and assisting in filling in testing application forms.
(V) After-Sales Service
The company is committed to providing customers with comprehensive after-sales services to ensure the smooth use of low-voltage copper flame-retardant and fire-resistant power cables (100, 150, 250, 300, 350 Mcm):
1. Quality Guarantee: The product has a warranty period of 2 years from the date of acceptance. During the warranty period, if the cable has quality problems due to non-human factors (such as insulation breakdown, conductor breakage, etc.), the company provides free repair or replacement services. For quality problems caused by improper use or installation by customers, the company can provide maintenance services at a reasonable cost.
2. Technical Support: A professional technical team is available to provide customers with technical consulting services, including cable laying guidance, installation precautions, and fault diagnosis. Customers can contact the technical support hotline or email for assistance, and technical staff will respond in a timely manner and provide solutions. For large-scale projects, the company can send technical personnel to the site for guidance and training to ensure the correct installation and use of the cable.
3. Complaint Handling: Establish a sound complaint handling mechanism. After receiving customer complaints, the after-sales staff will record and feedback them in a timely manner, and conduct an investigation and analysis. For complaints that can be handled on the same day, they will be resolved immediately; for more complex complaints, a solution will be proposed within 3 working days and communicated with the customer. The company will track the handling progress until the problem is completely resolved to ensure customer satisfaction.
4. Regular Follow-Up: After the cable is put into use, the company will conduct regular follow-up visits to understand the use status of the cable and collect customer opinions and suggestions. Based on the feedback, the company continuously improves product performance and service quality to provide customers with better products and services.
In summary, low-voltage copper flame-retardant and fire-resistant power cables (100, 150, 250, 300, 350 Mcm) have excellent performance and perfect after-sales service, and are ideal choices for high-safety-demand fields such as high-rise buildings, hospitals, data centers, subways, and large shopping malls. The company will, as always, adhere to the principle of quality first and customer foremost, providing customers with high-quality products and satisfactory services.
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