I. Product-specific Information
(1) Specifications and Parameters
The double shielded conductor cross-linked polyethylene (XLPE) cable is available in various cross-sectional area specifications such as 1core × 70mm², 185mm², 50mm², and 200mm². Each specification's parameters are carefully designed to meet power transmission needs in different scenarios.
In terms of conductor parameters, the conductors of all specification cables adopt a single-core design and are made of high-purity copper. The conductor diameter of the 50mm² specification is approximately 8.0mm, 70mm² is about 9.5mm, 185mm² is around 15.2mm, and 200mm² is roughly 16.0mm. The current-carrying capacities corresponding to these different diameter conductors vary. At an ambient temperature of 25℃, the current-carrying capacity of the 50mm² cable is approximately 180A, 70mm² is about 230A, 185mm² is around 450A, and 200mm² is roughly 480A, which can be accurately matched according to different current load requirements.
In terms of electrical performance, the rated voltage level of this series of cables is relatively high, up to 10kV, 35kV, etc., which can be specifically selected according to the actual application scenario. Its insulation resistance is extremely high. At 20℃, the insulation resistance value is not less than 1000MΩ·km, which can effectively prevent current leakage. Meanwhile, the cable has a small dielectric loss tangent value. Under the rated voltage, the dielectric loss tangent value is not more than 0.003, ensuring good electrical performance. In addition, the partial discharge quantity of the cable is extremely low. Under 1.73 times the rated voltage, the partial discharge quantity does not exceed 10pC, ensuring the stability of power transmission.
The mechanical performance parameters are also excellent. The tensile strength of cables of all specifications is not less than 12MPa, and the elongation at break is not less than 150%, which can withstand a certain degree of external tension without being easily damaged. In terms of bending performance, the static bending radius is not less than 12 times the outer diameter of the cable, and the dynamic bending radius is not less than 20 times the outer diameter of the cable, facilitating bending operations during installation and use.
(2) Characteristic Applications
This series of double shielded conductor
XLPE Cables has characteristic applications in many fields due to their excellent performance.
In
Power Stations, various power generation equipment such as steam turbines and generators require stable power transmission lines, and this cable can meet the needs of high-voltage and large-current transmission inside power stations. Cables of 50mm² and 70mm² specifications can be used for power supply lines of auxiliary equipment in the station, such as water pumps and fans; those of 185mm² and 200mm² specifications are suitable for connection lines between the main transformer and the distribution cabinet, ensuring efficient power output.
Substations are important places in the power system for voltage conversion and power distribution, which have high requirements on the anti-interference ability and stability of cables. The double shielding layer of this series of cables can effectively isolate complex electromagnetic interference in the substation, ensuring that power transmission is not affected. Cables of different specifications can be used for connections between distribution devices of different voltage levels. 50mm² and 70mm² ones are used for low-voltage side lines, and 185mm² and 200mm² ones are used for high-voltage side lines.
In industrial enterprises, large production equipment and production lines have a large demand for electricity, and there may be strong electromagnetic interference in the surrounding environment. For example, in steel mills, equipment such as rolling mills and steelmaking furnaces will generate a large number of electromagnetic signals during operation, and this cable can resist these interferences to ensure stable power supply. Cables of 50mm² and 70mm² specifications can be used for power supply of small and medium-sized equipment, and those of 185mm² and 200mm² specifications are suitable for main power supply lines of large equipment.
In urban high-voltage distribution systems, this cable can be used to transmit power from substations to distribution points in various regions. Due to its high rated voltage and current-carrying capacity, it can meet the needs of large-scale urban electricity consumption, and the double shielding layer can reduce the interference of external factors on power transmission, ensuring the stability of urban power supply. In addition, this cable can also play an important role in the power systems of large public facilities such as subways and airports, providing reliable power support for the normal operation of the facilities.
(3) Material and Style
Material
Conductor: High-purity oxygen-free copper is used as the Conductor Material, with a purity of more than 99.95%. Oxygen-free copper has excellent electrical conductivity, with a conductivity of 100% IACS (International Annealed Copper Standard), which can reduce losses during power transmission. At the same time, oxygen-free copper has good Flexibility, is easy to be processed into conductors of various specifications, and has good corrosion resistance, which can maintain stable performance during long-term use.
Insulation layer: Cross-linked polyethylene (XLPE) is selected as the Insulation Material. After cross-linking treatment, XLPE forms a three-dimensional network structure, making it have excellent heat resistance. The long-term working temperature can reach 90℃, and the short-term overload temperature can be as high as 130℃, which can maintain good insulation performance in high-temperature environments. In addition, XLPE also has good chemical corrosion resistance, can resist the erosion of acids, alkalis, oils and other chemical substances, and has strong aging resistance and a long service life.
Shielding layer: It consists of an inner semi-conductive water-blocking layer and an outer metal shielding layer. The inner semi-conductive water-blocking layer is made of semi-conductive materials, which has good conductivity and water absorption, can eliminate air gaps between the conductor and the insulation layer, prevent moisture from infiltrating, and play a role in uniform electric field. The outer metal shielding layer is usually made of copper tape or Copper Wire braiding. The thickness of the copper tape is about 0.1mm - 0.3mm, and the diameter of the copper wire is about 0.15mm - 0.3mm. It has excellent shielding performance, can effectively isolate external electromagnetic interference, and can be used as a grounding loop to improve the safety of the cable.
Outer sheath: Polyvinyl chloride (PVC) or polyethylene (PE) materials are used as the outer sheath. The PVC outer sheath has good mechanical strength and weather resistance, and can resist external mechanical impact and erosion of the natural environment; the PE outer sheath has better flexibility and low-temperature resistance, and is not easy to crack in low-temperature environments.
Style
This series of cables all have a single-core structure and are overall circular. The outer diameters of cables of different specifications are different. The outer diameter of 50mm² is about 25mm, 70mm² is about 28mm, 185mm² is about 42mm, and 200mm² is about 44mm. The color of the cable's outer sheath is usually black, which has good ultraviolet resistance, can reduce the aging effect of sunlight on the sheath, and is also easy to identify in various environments. The double shielding layer is tightly wrapped around the outside of the insulation layer, forming a complete shielding system to ensure the shielding effect.
(4) Production Process
The production process of this series of double shielded conductor XLPE cables is advanced and rigorous, ensuring that the product quality meets high standards.
First is the manufacturing of the conductor. High-purity oxygen-free copper rods are drawn into copper wires of the required diameter through a wire drawing machine, and then annealed to eliminate internal stress in the copper wires and improve their flexibility and conductivity. For conductors with large cross-sectional areas, such as 185mm² and 200mm², multiple copper wires are twisted together. During the twisting process, the twisting pitch is strictly controlled to ensure the roundness and stability of the conductor.
Next is the extrusion of the insulation layer. The extruder is used to heat and melt the XLPE material, and then evenly extrude and coat it on the surface of the conductor. During the extrusion process, the extrusion temperature (usually 120℃ - 180℃), speed and pressure are accurately controlled to ensure that the thickness of the insulation layer is uniform, closely combined with the conductor, and free of defects such as bubbles and impurities. After extrusion, the insulation layer is cross-linked by dry cross-linking or warm water cross-linking to make the XLPE molecules undergo a cross-linking reaction to form a stable three-dimensional network structure.
Then comes the production of the shielding layer. First, the inner semi-conductive water-blocking layer is extruded on the outside of the insulation layer to ensure that it evenly covers the surface of the insulation layer and is closely combined with the insulation layer. After that, the outer metal shielding layer is made by wrapping or braiding on the outside of the outer semi-conductive water-blocking layer. When wrapping the copper tape, the overlap rate is not less than 15%, and when braiding the copper wire, the braiding density is not less than 85% to ensure a good shielding effect.
Finally, the outer sheath is extruded. PVC or PE materials are extruded on the outside of the shielding layer through an extruder to form the outer sheath. During the extrusion process, relevant parameters are controlled to make the outer sheath have a uniform thickness, a smooth surface, and closely combined with the shielding layer.
During the production process, each process is equipped with strict quality inspection links, including the detection of conductor diameter, insulation layer thickness, shielding layer quality, outer sheath performance, etc., to ensure that each section of the cable meets relevant standards.
II. General Product Information
(1) Packaging
To ensure the quality of the cable during transportation and storage, this series of cables adopts a professional packaging method.
For long-length cables, they are usually wound on steel cable reels. The diameter of the cable reel depends on the cable specification. The diameter of the cable reel for 50mm² and 70mm² is about 1200mm, and that for 185mm² and 200mm² is about 1600mm. Both sides of the cable reel are equipped with strong baffles with a thickness of not less than 18mm, which can effectively prevent the cable from slipping. The cable reel is also equipped with special lifting rings for easy hoisting and handling.
After the cable is wound on the cable reel, it will be tightly wrapped with a plastic film to prevent pollution from dust, moisture and oil. For each reel of cable, clear product information will be marked on the side of the cable reel, including product name, specification model, length, weight, production date, implementation standard, manufacturer, etc., which is convenient for customers to identify and count. In addition, warning signs such as "Do not invert", "Handle with care", "Moisture-proof and sun-proof" will be printed on the packaging to remind relevant personnel to pay attention to protection.
For short-length cables, they can be packaged in rolls, wrapped with plastic film and then put into cartons. The cartons have high strength and can prevent the cables from being damaged by extrusion.
(2) Transportation
Transportation methods: According to the transportation distance and order quantity, different transportation methods can be selected. For short-distance transportation, road transportation is generally used, and trucks are used to load cable reels. The trucks need to be equipped with fixing devices to firmly fix the cable reels to prevent shaking during transportation. For long-distance transportation, railway transportation can be chosen, which has good stability and is suitable for transporting large quantities of cables; for areas with ports, waterway transportation can also be used, with relatively low cost.
Transportation precautions: During transportation, the cable reel must be placed horizontally, and it is strictly forbidden to tilt or invert to prevent the cable from slipping off the cable reel. A certain distance should be kept between cable reels to prevent mutual collision and extrusion, which may cause damage to the cable outer sheath and internal structure. Transport vehicles or means of transport should take rain-proof, sun-proof and dust-proof measures, such as covering with rain-proof cloth, to avoid the cable being affected by bad weather. When loading and unloading the cable reel, special hoisting equipment must be used, and the hoisting point should be selected at the lifting ring of the cable reel. Hoisting at the baffle or other parts is not allowed to avoid damaging the cable reel and the cable. During transportation, traffic rules must be observed, and driving should be smooth, avoiding sudden braking, sharp turns and other operations to reduce the impact on the cable.
(3) Delivery
Delivery time: After the customer confirms the order and makes payment, we will arrange delivery as soon as possible. For specifications in stock, they can usually be shipped within 3 - 5 working days; for customized specifications or large quantities of orders, the production cycle will be extended according to the actual situation. We will communicate with the customer in advance to clarify the delivery time to ensure that the customer can reasonably arrange subsequent work.
Delivery process: First, warehouse personnel accurately pick cables of corresponding specifications and lengths according to the order information and conduct strict checks to ensure that the product information is consistent with the order. Then, re-inspect the cable to confirm that there is no quality problem, and then package it according to the packaging standards. After that, contact the cooperative logistics company, arrange transport vehicles, safely load the cable onto the vehicle, and fix it firmly. After delivery, we will promptly inform the customer of the logistics information (such as logistics company name, waybill number, contact information, etc.) via SMS, email, etc., to facilitate the customer to track the transportation status of the goods. At the same time, we will maintain close communication with the logistics company to keep abreast of the transportation situation of the goods and ensure that the goods are delivered on time and safely.
(4) Samples
To allow customers to fully understand the product quality and performance before mass purchase, we provide sample services.
Customers can apply to us for samples, stating the specification model, length and other information of the required cable. We will prepare the samples within 1 - 3 working days after receiving the application. The length of the samples is generally 1 - 2 meters, which can meet the customer's testing needs for the appearance,
Structure and Performance of the cable.
The quality of the samples is consistent with that of mass-produced products, and they strictly follow the same production process and quality standards. In terms of sample fees, for ordinary customers, we will charge a certain sample fee and freight, and the sample fee can be deducted when the customer makes subsequent mass purchases; for long-term cooperative old customers or large customers with clear intention of mass purchase, we can provide free samples, and the freight is borne by the customer or negotiated by both parties.
After the sample is sent, we will promptly inform the customer of the express information of the sample. After receiving the sample, if the customer has any questions, our technical personnel will provide professional answers and technical support.
(5) After-sales Service
We have a complete after-sales service system to provide customers with comprehensive after-sales guarantee.
Quality assurance: This series of cable products provides a 15-year warranty period. During the warranty period, if the cable cannot be used normally due to its own quality problems (such as conductor breakage, insulation layer damage, shielding layer failure, etc.), we will provide customers with free repair or replacement services. If the damage is caused by non-product quality reasons such as improper installation and incorrect use by the customer, we can also provide repair services, but corresponding repair fees and material fees will be charged.
Technical support: Customers can contact our technical personnel at any time if they encounter any technical problems during the installation, laying, use and maintenance of the cable. Our technical personnel will provide customers with professional technical guidance through telephone, email, video, etc., such as installation methods, laying precautions, fault diagnosis, etc. When necessary, we can dispatch technical personnel to provide on-site technical support.
Complaint handling: If customers are dissatisfied with the product or service, they can complain through customer service hotline, email and other channels. We will respond to the complaint within 24 hours, arrange special personnel to handle it, and give a satisfactory solution within 7 working days to ensure that the reasonable demands of customers are met.
Regular return visits: We will conduct regular return visits to customers who have purchased the products to understand the use of the cables, collect customers' opinions and suggestions, and continuously improve product and service quality to enhance customer satisfaction.
In conclusion, the double shielded conductor cross-linked polyethylene (XLPE) cable (1core × 70mm², 185mm², 50mm², 200mm²) has become an ideal choice in the field of power transmission with its excellent specifications and parameters, wide range of characteristic applications, high-quality materials and styles, advanced production technology, as well as perfect packaging, transportation, delivery, sample and after-sales services, and can provide reliable line support for various important power facilities.
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