The A2xfy, 2xfy, A2xwy, 2xwy series of XLPE insulated PVC jacket underground Copper Core Power Cables and wires have carefully set specification parameters to adapt to the diverse needs of underground power transmission.

In terms of conductors, high-purity oxygen-free copper is used as the Conductor Material, with a purity of over 99.95%, which gives the conductor excellent electrical conductivity, with a conductivity of over 100% IACS (International Annealed Copper Standard). The cross-sectional area of the conductor has a wide range, covering 1.5mm² to 800mm². Among them, the specifications of 1.5mm² to 10mm² are often used for small underground distribution branches, such as courtyard lighting, power supply for small irrigation equipment, etc.; the specifications of 16mm² to 95mm² are suitable for medium-power underground power transmission and distribution, such as community underground distribution systems, underground wiring in small factories, etc.; the large cross-sectional area specifications of 120mm² to 800mm² can meet the high-power power transmission needs of large municipal engineering, main transmission lines in industrial plants, etc. The conductor structure is multi-strand bunch stranding, and the stranding method adopts regular stranding, with the pitch ratio controlled between 12-20 times. This not only ensures the Flexibility of the conductor, facilitating underground bending and laying, but also reduces the loss caused by the skin effect and proximity effect.

The thickness of the insulation layer depends on the rated voltage and conductor cross-sectional area of the cable. For cables with a rated voltage of 0.6/1kV, the thickness of the insulation layer is between 0.7mm-4.5mm; for cables with a rated voltage of 10kV, the thickness of the insulation layer is between 3.4mm-5.6mm. The volume resistivity of cross-linked polyethylene (XLPE) insulating material is ≥1×10¹⁴Ω·m, and the dielectric loss tangent (at 20℃, 1MHz) is ≤0.002, which has extremely high insulation performance, can effectively prevent current leakage, and ensure the safe and stable underground power transmission.

The thickness of the sheath layer also varies with the cable specification, generally ranging from 1.2mm to 5.0mm. The polyvinyl chloride (PVC) sheath has a tensile strength of ≥12MPa and an elongation at break of ≥150%, with good mechanical properties, which can provide reliable protection for the internal structure of the cable. This series of cables has multiple rated voltage levels such as 0.6/1kV, 10kV, and 35kV, which can meet the underground power transmission needs of different voltage levels. In terms of temperature adaptation, the long-term allowable operating temperature of the cross-linked polyethylene insulation layer is 90℃, and the allowable operating temperature in case of short circuit (maximum duration not exceeding 5 seconds) can reach 250℃; the operating temperature range of the polyvinyl chloride sheath is -15℃ to 60℃, which can adapt to temperature changes at different underground depths.

In addition, the minimum bending radius of the cable is also clearly specified. The minimum bending radius of Unarmored Cables is 10 times the outer diameter of the cable, and the minimum bending radius of Armored Cables is 15 times the outer diameter of the cable, ensuring that the cable will not be damaged due to excessive bending during underground laying.

With its unique performance advantages, the A2xfy, 2xfy, A2xwy, 2xwy series cables have a wide range of characteristic uses in the field of underground power transmission.

In municipal engineering, this series of cables plays an important role. The underground distribution network of urban roads needs stable and reliable cables to transmit electricity to ensure the normal operation of municipal facilities such as street lamps and traffic lights. Due to its good moisture resistance and corrosion resistance, it can work stably for a long time in the underground humid environment that may contain corrosive substances, reducing the risk of municipal facilities being paralyzed due to cable failures. For example, in the Underground Cable laying of urban main roads, this series of cables can withstand the ground pressure caused by road vehicles and the extrusion of underground soil, ensuring continuous power transmission.

Underground wiring in industrial plants is another important application scenario of this series of cables. In industrial production, many large-scale equipment need to obtain electricity from underground, and the underground environment of the plant may have corrosive factors such as oil pollution and chemical substances. The cross-linked polyethylene insulation layer and polyvinyl chloride sheath of this series of cables can effectively resist these corrosions, ensure stable power supply, and ensure the normal operation of production equipment. For example, in chemical industrial parks, Underground Cables need to withstand the penetration and erosion of various chemical liquids, and the chemical corrosion resistance of this series of cables makes it an ideal choice.

In the underground power transmission and distribution system, this series of cables can be used to connect substations and various power consumption areas. It can be seen in both the underground trunk lines of urban power grids and the underground branch lines of rural power grids. In long-distance underground power transmission, its low-loss characteristic can reduce the waste of electricity during transmission and improve energy utilization efficiency. At the same time, its good mechanical strength can adapt to the settlement and displacement of underground soil, ensuring the continuity of power transmission.

In addition, this series of cables can also meet the needs in some special underground scenarios, such as subway projects and underground parking lots. In subway projects, underGround Cables need to be laid in a narrow space and bear certain vibrations. The flexibility and anti-vibration performance of this series of cables enable them to adapt to this environment; the power supply of underground parking lots has extremely high requirements for the safety of cables. The high insulation performance and flame retardancy (of some models) of this series of cables can reduce the risk of fire and ensure the safety of personnel and vehicles.

The A2xfy, 2xfy, A2xwy, 2xwy series cables fully consider the particularity of the underground environment in material selection and style design, striving to achieve a perfect combination of performance and practicality.

In terms of materials, the conductor uses high-purity oxygen-free copper, which has extremely high conductivity and can reduce energy loss during power transmission. At the same time, oxygen-free copper has good flexibility and is easy to be processed into multi-strand Stranded Conductors, meeting the bending requirements during underground laying. Moreover, it has strong corrosion resistance and is not easy to be corroded in the relatively closed underground environment, prolonging the service life of the cable.

The cross-linked polyethylene (XLPE) material used for the insulation layer is made by cross-linking linear polyethylene molecules to form a three-dimensional network structure. This structure gives XLPE materials many excellent properties: first, it has excellent heat resistance, can maintain stable insulation performance at higher temperatures, and adapt to possible temperature fluctuations underground; second, it has strong chemical corrosion resistance, can resist the erosion of acid and alkali substances, microorganisms, etc. in the underground soil; third, it has high mechanical strength, with large tensile strength and elongation at break, and can withstand tensile, extrusion and other external forces during underground laying.

The polyvinyl chloride (PVC) material selected for the sheath layer is a kind of synthetic material with excellent performance. It has good moisture resistance, can effectively prevent underground moisture from entering the cable, and protect the insulation layer and conductor; it has strong wear resistance, can resist friction with soil, rocks, etc. during cable laying and use, reducing sheath damage; it has good anti-aging performance, can be used underground for a long time without aging and cracking, ensuring the protective effect of the cable.

In terms of styles, this series of cables mainly has two types: unarmored and armored. The unarmored cable has better flexibility and relatively light weight, and is suitable for scenarios where the underground soil is relatively soft and the laying environment is relatively simple, such as shallow buried laying in community underground. The armored cable has an additional layer of Steel Tape or steel wire armor outside the sheath layer. Steel tape armor is suitable for occasions with longitudinal pressure, and steel wire armor can bear large tensile force. The addition of the armor layer greatly enhances the mechanical strength and impact resistance of the cable, and is suitable for scenarios where the underground soil is hard, there may be rocks or other hard objects, and occasions that need to bear large external forces, such as underground laying across roads and railways.

Regardless of the style, the appearance of the cable is designed to be black, which not only facilitates identification during underground construction, but also reduces the impact of light on the cable and delays material aging. The surface of the cable is printed with clear marks such as model, specification, rated voltage, and manufacturer, which is convenient for construction and maintenance personnel to identify and use.

The production process of the A2xfy, 2xfy, A2xwy, 2xwy series cables is advanced and rigorous, ensuring high quality and high performance of the products.

The conductor manufacturing process is the basic link in cable production. First, high-purity oxygen-free copper ingots are made into copper rods through smelting, casting and other processes, and the diameter of the copper rods depends on the final conductor specifications. Then, the copper rods are drawn into Copper Wires of the required diameter through a continuous wire drawing machine. During the wire drawing process, emulsion is used for cooling and lubrication to ensure the surface quality and dimensional accuracy of the copper wires. The drawn copper wires need to be annealed. Annealing is carried out in a continuous annealing furnace in a protective gas (such as nitrogen) environment, and the temperature is controlled at 300-500℃ to eliminate the internal stress of the copper wires and improve their flexibility and conductivity. The annealed copper wires are stranded according to certain stranding rules to form conductors. During the stranding process, special stranding equipment is used to strictly control the stranding pitch and tension to ensure that the conductor structure is tight and round.

The insulation layer extrusion and cross-linking process is the key to ensuring the insulation performance of the cable. A three-layer co-extrusion extruder is used for insulation layer extrusion, and the cross-linked polyethylene material is evenly extruded and wrapped on the surface of the conductor. During the extrusion process, the extrusion temperature (generally 120-180℃), extrusion speed and pressure are strictly controlled to ensure that the insulation layer has uniform thickness, smooth surface, and no defects such as bubbles and impurities. The extruded cable core enters the cross-linking pipe for cross-linking treatment, using a dry cross-linking process, with nitrogen as the protective gas. Under high temperature (about 200-250℃) and high pressure (about 1.5-2.5MPa) conditions, the polyethylene molecules undergo a cross-linking reaction to form a three-dimensional network structure. The cross-linking time depends on the cable specification to ensure that the cross-linking degree reaches more than 70%, so as to ensure the excellent performance of the insulation layer.

The sheath extrusion process is also important. Polyvinyl chloride material is added to the extruder, and after plasticization, it is extruded and wrapped outside the Insulated Cable core to form a sheath layer. Before extrusion, the polyvinyl chloride material needs to be fully dried to remove moisture and prevent bubbles in the sheath. During the extrusion process, the extrusion temperature (160-190℃), speed and pressure are controlled to make the sheath layer closely combine with the insulation layer, with uniform thickness and flat surface. For armored cables, after the sheath is extruded, armoring treatment is required. Steel tape or steel wire is wrapped around the sheath surface through an armoring machine, and the winding tension should be uniform to ensure that the armor layer is tight and firm and plays an effective protective role.

Throughout the production process, quality inspection runs through. When raw materials enter the factory, strict performance testing is carried out on copper rods, cross-linked polyethylene, polyvinyl chloride, etc. to ensure that they meet relevant standards; during the production process, online testing is carried out on the diameter of the conductor, the thickness of the insulation layer and sheath layer, the outer diameter of the cable, etc.; finished cables need to undergo multiple tests such as withstand voltage test, insulation resistance test, partial discharge test, and mechanical performance test to ensure that each batch of cables meets the quality requirements.

The packaging design of the A2xfy, 2xfy, A2xwy, 2xwy series cables fully considers the protection, transportation and storage needs of the products, ensuring that the cables are in good condition when they reach the users.

For long-length cables, strong 铁木 composite reels are used for packaging. The 铁木 composite reels are made of high-quality steel and hardwood, with extremely high strength and load-bearing capacity, and can withstand the weight of the cables and the bumps during transportation. The diameter of the cable reel depends on the length and cross-sectional area of the cable, generally between 800mm-2000mm. When the cable is coiled onto the cable reel, it is arranged neatly and tightly to avoid mutual winding and extrusion. During the coiling process, the tension is controlled to prevent excessive stretching of the cable. Both sides of the cable reel are equipped with solid side plates, and the side plates are provided with lifting lugs for easy hoisting. The lifting lugs have undergone strength tests to ensure safety and reliability during hoisting.

The outside of the cable reel is wrapped with a thick waterproof plastic film with a thickness of not less than 0.12mm, which can effectively prevent moisture, dust, etc. from entering the cable reel and protect the cable from pollution and moisture. For armored cables or cables transported in harsh environments, a layer of linen or woven bag is wrapped outside the plastic film to further enhance the protective performance of the packaging and prevent the cables from being collided and worn.

Each cable reel is fixed with a clear identification plate, which indicates the cable's model, specification, length, weight, rated voltage, production batch number, production date, implementation standard, manufacturer's name and contact information, etc., which is convenient for users to identify and accept. At the same time, warning signs such as "Do not invert", "Handle with care", "Moisture-proof and sun-proof" are pasted in the prominent position of the cable reel to remind transportation and storage personnel to pay attention to correct operations.

For small-length cable samples or retail cables, high-strength corrugated cartons are used for packaging. The cartons are made of five-layer corrugated paper with good compressive performance. The cables are wrapped with soft foam or bubble film in the cartons to avoid shaking and collision during transportation. The outside of the carton is also printed with product information and warning signs, and the carton closure is sealed with high-strength tape to ensure that the packaging is firm.

The transportation process of the A2xfy, 2xfy, A2xwy, 2xwy series cables strictly follows relevant regulations and operating procedures to ensure the safety and quality of the cables.

The transportation mode is selected according to factors such as the quantity, specification and transportation distance of the cables. For short-distance transportation (distance within 500 kilometers) and small batches of cables, road transportation is usually adopted. The transport vehicles are trucks with fixing devices, and the bottom of the truck compartment is flat with no sharp debris. When loading cables, the cable reels are placed upright in the compartment and firmly fixed on the columns on both sides of the compartment with steel wire ropes or fasteners to prevent the cable reels from sliding, tilting or turning over during transportation. A certain gap is left between the cable reels to avoid mutual collision. During transportation, the speed is controlled within 60 km/h, avoiding sudden braking, sharp turns and severe bumps.

For long-distance transportation (distance over 500 kilometers) and large quantities of cables, railway transportation is an ideal choice. Railway transportation uses special freight trains, and the cable reels are placed on flat cars and firmly fixed. During transportation, the railway department will track and supervise the goods throughout the process to ensure transportation safety. In addition, for areas with ports, water transportation can also be used. Water transportation has low cost and is suitable for transporting large quantities and long-length cables. During water transportation, the cable reels need to be placed in the cabin, and moisture-proof and anti-corrosion treatments should be done to avoid damage to the cables by seawater or humid air.

The following matters should also be noted during transportation: the cable reels must be placed upright, and inversion or flat placement is strictly prohibited to avoid damage to the insulation layer and sheath due to cable extrusion; during transportation, the cables should be prevented from being exposed to the sun and rain. For uncovered transport tools, the cable reels must be tightly covered with rain cloth; during transportation in winter, thermal insulation measures should be taken to prevent the cables from becoming brittle and breaking at low temperatures; if special weather (such as heavy rain, heavy snow, strong wind, etc.) is encountered during transportation, transportation should be suspended, and the vehicles or ships should be parked at safe places, and transportation should continue after the weather improves.

Before transportation, the shipper will sign a detailed transportation contract with the carrier, clarifying the rights and obligations of both parties. At the same time, the relevant information of the cable and transportation precautions are provided to the carrier, and the carrier needs to train the transport personnel to ensure that they understand the correct operation methods. During transportation, special personnel are arranged to track and timely understand the transportation status of the goods. In case of emergencies, measures can be taken in time.

The delivery process of the A2xfy, 2xfy, A2xwy, 2xwy series cables is standardized and orderly, aiming to ensure that the goods are delivered to customers accurately and timely.

After the customer places an order, the sales department will immediately enter the order information into the system and transmit it to the production department and the warehouse department. The production department formulates a detailed production plan and organizes production according to the model, specification, quantity and delivery date required by the order. The warehouse department checks the inventory. If there is sufficient stock,

it will arrange the goods immediately; if there is insufficient stock, it will wait for the production department to complete the production and then store the cables in the warehouse for subsequent goods preparation.

During the goods preparation process, warehouse managers will conduct strict inspections on the cables in accordance with the model, specification, length and other requirements specified in the order to ensure that the delivered goods are consistent with the order and meet the quality standards. The inspection includes checking the appearance of the cable for scratches, cracks or damage on the insulation layer and sheath, verifying that the markings on the cable surface are clear and complete, and confirming that the packaging is intact. If any problems are found, they will promptly communicate with the production department for handling, and it is strictly prohibited to deliver unqualified products out of the warehouse.

After the goods are prepared, the warehouse department will feed back the goods information to the sales department. The sales department will reconfirm the delivery address, contact person, contact number, delivery time and other details with the customer to ensure the accuracy of the information. Then, the sales department will arrange logistics transportation, select appropriate transportation methods and reliable transportation companies, and promptly inform the customer of the transportation information, including the name of the transportation company, the license plate number of the vehicle, and the estimated arrival time, so that the customer can make preparations for receiving the goods.

When delivering the goods, the warehouse department will issue detailed delivery documents, including the product outbound list, packing list, quality inspection report, etc. These documents clearly indicate the product name, model, specification, quantity, length, weight, delivery date, consignor, consignee and other information, and are stamped with the company's official seal. The delivery documents are made in multiple copies, with one copy accompanying the goods, one copy given to the transportation company, and one copy retained by the company for filing. At the same time, warehouse staff will assist the transportation company in safely loading the cables onto the transport vehicles and go through the goods handover procedures with the driver. Both parties will sign and confirm on the delivery documents to ensure that the goods are delivered correctly.

After the goods are shipped, the sales department will track the transportation status of the goods. Through communication with the transportation company and GPS positioning, they can keep abreast of the real-time location and transportation progress of the goods. If there is a transportation delay or other abnormal situations, they will promptly communicate with the customer to explain the situation and take corresponding remedial measures to minimize the impact on the customer.

To enable customers to better understand the performance and quality of the A2xfy, 2xfy, A2xwy, 2xwy series cables, the company provides convenient sample services.

Customers can apply for samples through various channels such as the company's official website, telephone, email, and WeChat. When applying, customers need to provide information such as the model, specification, and quantity of the required samples, as well as basic information including the customer's name, contact person, contact number, and delivery address. For samples with special requirements (such as specific lengths, special markings, etc.), customers need to indicate them when applying.

After receiving the sample application, the sales department will review the application within 24 hours. For samples of conventional models and specifications, after the review is passed, the warehouse department will prepare and send out the samples within 1-3 working days; for special models or customized samples, the production department will arrange production according to the sample requirements, and the sample preparation time is generally 7-15 working days.

The length of the samples is usually 1-5 meters, which can meet the customer's needs for intuitive feeling of the cable's appearance, flexibility, material, etc., and basic performance testing. The samples are packaged in small cartons or sealed bags, with the company logo and sample information printed on the packaging to ensure that the samples are not damaged during transportation.

The company may charge a certain sample fee for samples, and the specific fee standard depends on the model, specification and quantity of the samples. For customers who place formal orders after receiving the samples, the company will deduct the sample fee from the order amount as appropriate. The transportation cost of the samples is generally borne by the customer, and the company can assist in arranging transportation according to the customer's requirements.

After the samples are sent out, the sales department will inform the customer of the sample tracking number and estimated arrival time, so that the customer can track the sample logistics information. At the same time, the sales staff will maintain communication with the customer, answer the customer's questions about the samples in a timely manner, and collect the customer's feedback on the samples to provide a reference for the customer's subsequent purchase decisions.

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 guarantee for the A2xfy, 2xfy, A2xwy, 2xwy series cables.

The after-sales service scope includes technical consultation, installation guidance, fault handling, and product maintenance. Customers can contact the company's after-sales service hotline or designated after-sales staff at any time if they encounter any problems during the use of the cables. The after-sales staff will respond to the customer's inquiries within 2 hours and provide professional solutions.

For technical consultation, the after-sales team is composed of professional and technical personnel with rich experience, who can provide customers with detailed explanations on cable performance, installation methods, maintenance precautions, etc., to help customers better understand and use the products.

In terms of installation guidance, if customers need it, the company can send technical personnel to the site to guide the cable installation, ensuring that the installation process meets the specifications and requirements, and avoiding installation errors that may cause cable damage or performance degradation. The technical personnel will also provide training on installation skills and precautions to the customer's installation team.

In case of cable faults during use, the after-sales staff will first understand the fault situation in detail through telephone, video, etc., and analyze the possible causes of the fault. If it is a simple fault that can be handled by the customer themselves, the after-sales staff will guide the customer to troubleshoot and repair; if on-site processing is required, the company will arrange technical personnel to rush to the site as soon as possible (the arrival time depends on the distance, generally within 24-72 hours for domestic customers) to carry out fault handling.

For product quality problems that occur within the warranty period (the warranty period is generally 1-3 years, depending on the product model and usage scenario), the company will provide free repair or replacement services in accordance with the terms of the sales contract and relevant national standards. For quality problems caused by improper use or man-made damage, the company will provide maintenance services at a reasonable cost.

The company also establishes a customer service file for each customer, recording the customer's purchase information, usage feedback, and after-sales service records. Regular return visits are made to customers to understand the usage of the cables and collect customer opinions and suggestions, so as to continuously improve product quality and service level.

In addition, the company provides lifelong technical support for the products. Even after the warranty period, customers can still consult the company's after-sales team on technical issues, and the company will provide corresponding technical guidance and solutions.

Through professional and thoughtful after-sales service, the company strives to solve the worries of customers in the process of using the cables, enhance customer satisfaction and trust, and establish long-term and stable cooperative relationships with customers.