Vvg-Ng 4X25 4X35 4X50 4c 25mm2 Tr XLPE Insulated Pure Copper Underground Electrical Power Cable Competitive Price

The Vvg-Ng models 4X25, 4X35, 4X50 and the 4c 25mm² Tr XLPE insulated pure copper underground electrical Power Cables have clear and detailed divisions in their specification parameters, which collectively determine the performance and application scope of the cables in underground power transmission.

In terms of conductor structure, "4X" and "4c" clearly indicate that these cables all contain 4 Conductors. Among them, the numbers following Vvg-Ng 4X25, 4X35, 4X50 represent the cross-sectional area of each conductor, which are 25mm², 35mm², and 50mm² respectively; 4c 25mm² means the cross-sectional area of each conductor is 25mm². The cross-sectional area of the conductor is a key factor affecting the current-carrying capacity of the cable; the larger the cross-sectional area, the greater the current-carrying capacity. According to professional tests, at an ambient temperature of 25℃, the long-term allowable current-carrying capacity of the 4X25mm² cable is approximately 85A, which can meet the power transmission needs of equipment with a power of about 18kW; the long-term allowable current-carrying capacity of the 4X35mm² cable is about 110A, which can handle power transmission with a power of around 24kW; the long-term allowable current-carrying capacity of the 4X50mm² cable can reach 140A, which can meet the electricity demand of high-power equipment with a power of more than 30kW; the long-term allowable current-carrying capacity of the 4c 25mm² cable is similar to that of the 4X25mm² cable, approximately 80A, and is suitable for power transmission within a similar power range.

In addition to the cross-sectional area of the conductor, the outer diameter of the cable is also an important specification parameter. The outer diameter of the 4X25mm² cable is about 28mm, the 4X35mm² cable is about 32mm, the 4X50mm² cable is about 38mm, and the 4c 25mm² cable is about 27mm. Different outer diameter sizes have a certain impact on the laying method and installation space of the cable. When laying underground, it is necessary to select the appropriate specification of the cable according to factors such as the pipe diameter and the thickness of the soil layer to ensure the smooth progress of the laying process and safe operation in the later period.

Furthermore, the insulation thickness and sheath thickness of the cable are also strictly regulated. The thickness of the Tr XLPE insulation layer varies according to the cable specification. The insulation thickness of the 4X25mm² and 4c 25mm² cables is about 1.4mm, the 4X35mm² cable is about 1.6mm, and the 4X50mm² cable is about 1.8mm. In terms of sheath thickness, the sheath thickness of these cables is not less than 2.0mm. Sufficient insulation and sheath thickness can effectively ensure the insulation performance and mechanical strength of the cable, preventing insulation breakdown and sheath damage in the complex underground environment.

The Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground Electrical Power Cables, relying on their unique performance advantages, have a wide range of characteristic uses in multiple fields.

In the construction of urban underground power grids, these cables play a crucial role. The power main lines under urban arterial roads need to undertake the transmission task of a large amount of residential and commercial electricity. The 4X50mm² cable, with its large current-carrying capacity, becomes the ideal choice for such main lines, capable of stably transmitting electricity to various regions. In the underground power transmission of urban secondary roads and branch roads, the 4X35mm² cable can meet the medium-power electricity demand, ensuring the stable electricity usage of surrounding residents and small commercial facilities.

The underground power distribution system in industrial parks has high requirements for cable performance. Due to the presence of a large number of high-power production equipment in industrial parks, such as large machine tools and industrial boilers, the 4X50mm² cable can provide sufficient power support for these equipment, ensuring the smooth progress of production. At the same time, in the Underground Cable lines connecting various production workshops, the 4X25mm² and 4c 25mm² cables are also widely used. They can meet the power transmission needs of small and medium-sized equipment in the workshop, ensuring reasonable and stable power distribution within the workshop.

Underground power transmission in residential communities is another important application scenario for these cables. With the improvement of residents' living standards, there are an increasing number of various electrical equipment in families, and the demand for electricity is also constantly increasing. The 4X25mm² and 4c 25mm² cables are suitable for the underground power distribution system of the community, transmitting electricity from the substation to the distribution boxes of each building, and then distributing it to each household, ensuring the normal electricity usage of residents. For some large residential communities or those equipped with central heating, central air conditioning and other facilities, the 4X35mm² cable can better meet their higher electricity demand.

These cables also perform well in the power supply of underground parking lots. Underground parking lots need to supply power to lighting, ventilation, charging piles and other equipment. The 4X25mm² and 4c 25mm² cables can meet the power transmission needs of these equipment, ensuring the normal operation of the parking lot. For the underground parking lots of some large commercial complexes, due to more equipment and higher power, the 4X35mm² cable is more applicable.

In addition, in some special underground projects, such as power transmission along underground tunnels and subway lines, these cables can also play an important role. They can adapt to the complex environment in underground tunnels and provide stable power support for lighting, communication, ventilation and other systems in the tunnels.

The Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper Underground Electrical Power Cables have undergone careful consideration in material selection to ensure their stable performance and service life in the complex underground environment.

The Conductor Material is high-purity pure copper with a purity of over 99.9%. Pure copper has excellent electrical conductivity, with high conductivity, which can effectively reduce energy loss during power transmission and improve transmission efficiency. At the same time, pure copper has good ductility and mechanical strength, which can withstand a certain degree of stretching and bending during cable production and laying, and is not easy to break. In addition, pure copper has good corrosion resistance, and can maintain stable performance for a long time in the environment of moisture and chemical substances in underground soil, ensuring the reliability of power transmission.

The Insulation Material is Tr XLPE (cross-linked polyethylene), which is a specially treated polyethylene material. Compared with traditional polyethylene, XLPE has more excellent electrical performance, with high insulation resistance and good corona resistance, which can effectively prevent leakage during power transmission and improve the safety performance of the cable. At the same time, XLPE has excellent temperature resistance, and can work stably in the temperature range of -40℃ to 90℃, being able to adapt to large temperature changes that may occur in the underground environment. In addition, XLPE also has good chemical corrosion resistance and aging resistance, which can resist the erosion of acids, alkalis, salts and other chemical substances in underground soil, and prolong the service life of the cable.

The sheath material of the cable usually uses polyethylene or polyvinyl chloride, which have good mechanical strength and corrosion resistance. The main function of the sheath is to protect the insulation layer and conductor of the cable from external mechanical damage and chemical erosion. During underground laying, it can withstand external forces such as soil pressure and stone impact, ensuring the safe operation of the cable. At the same time, the sheath material also has certain waterproof performance, which can prevent underground moisture from infiltrating into the cable and affecting the insulation performance of the cable.

In terms of style, these cables are all of circular structure, which is conducive to cable production, laying and installation. Circular cables have less resistance when laid in underground pipes, and can be more conveniently pulled and laid. At the same time, the circular structure makes the force on the cable more uniform, and can better disperse the pressure when bearing external pressure, reducing the risk of local damage. In addition, the surface of the cable is usually relatively smooth, which also helps to reduce friction during laying and improve construction efficiency.

The color of the cable is also clearly specified. Generally, the sheath color is mostly black, which has good weather resistance and can adapt to the light conditions underground. At the same time, black is also convenient for identification and maintenance in the underground environment.

The production process of the Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground Electrical Power Cables strictly follows relevant industry standards and adopts advanced production technology to ensure the quality and performance of the products.

The first step is the manufacturing process of the conductor. High-purity electrolytic copper rods are selected as raw materials, and the copper rods are drawn into Copper Wires of the required diameter through a wire drawing machine. During the wire drawing process, it is necessary to accurately control the drawing speed and tension to ensure the dimensional accuracy and mechanical properties of the copper wires. The drawn copper wires undergo annealing treatment to eliminate internal stress and improve the Flexibility and conductivity of the copper wires. Then, multiple copper wires are stranded together to form a conductor. The stranding process adopts a regular stranding method, which can improve the filling factor and flexibility of the conductor, and reduce damage to the conductor during bending.

Next is the insulation extrusion process. The Stranded Conductor is fed into the extruder, and a layer of Tr XLPE insulation is extruded outside the conductor. During the extrusion process, it is necessary to strictly control parameters such as extrusion temperature, speed and pressure. The XLPE material needs to be fully dried before extrusion to remove moisture in the material and avoid defects such as bubbles in the insulation layer. The extruded insulation layer needs to undergo cross-linking treatment, usually using warm water cross-linking or steam cross-linking, so that the XLPE molecules form a three-dimensional network structure, thereby improving the temperature resistance, mechanical strength and electrical performance of the insulation layer.

Then comes the cabling process. Multiple Insulated Wire cores are stranded together according to a certain stranding direction and pitch to form the cable core. During the cabling process, it is necessary to add fillers in the middle of the cable core. The fillers usually use materials such as polypropylene rope or asbestos rope to ensure the roundness and stability of the cable core, and also play a certain buffering role to reduce damage to the insulation layer during laying.

After that is the sheath extrusion process. A layer of sheath is extruded outside the cabled core. The sheath extrusion process is similar to the insulation extrusion process, and various parameters need to be controlled to ensure that the sheath has uniform thickness, smooth surface and is closely combined with the cable core. After extrusion, the sheath needs to be cooled to make it shape quickly.

During the production process, multiple quality inspections are also required. For example, the DC resistance test of the conductor to ensure that the conductivity of the conductor meets the requirements; the insulation resistance test and withstand voltage test to inspect the insulation performance and electrical strength of the insulation layer; the tests of the sheath's thickness, outer diameter, mechanical properties, etc., to ensure that the quality of the sheath meets the standards. In addition, the cable also needs to undergo partial discharge test and aging test to comprehensively evaluate the performance of the cable.

Attention is also paid to environmental protection and safety during the production process. Environmentally friendly raw materials and additives are used to reduce environmental pollution during production. The production workshop is equipped with complete ventilation, dust removal and wastewater treatment equipment to ensure that the production environment meets environmental protection requirements. At the same time, production operators need to receive strict training, be familiar with the production process and safety operating procedures, to avoid safety accidents.

To ensure the quality of the Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground electrical power cables during transportation and storage, a scientific and reasonable packaging method is adopted.

For long-length cables, cable reels are usually used for packaging. Cable reels are divided into wooden cable reels and steel cable reels. Wooden cable reels are made of high-quality pine or fir, which have sufficient strength and rigidity to bear the weight of the cable and external forces during transportation. Steel cable reels are welded with high-quality steel, which have higher strength and are suitable for heavier cables. The cable is neatly wound on the cable reel, and the winding tension needs to be controlled during the winding process to avoid damage to the cable due to excessive stretching or extrusion. The outer layer of the cable is wrapped with a layer of plastic film, which has good moisture-proof performance and can prevent the cable from being eroded by moisture during transportation and storage. At the same time, protective plates are installed on both sides of the cable reel. The protective plates are made of thick wooden boards or metal plates, which can prevent the cable from being damaged by collision during transportation.

For short-length cables, coil packaging can be adopted. The cable is wound into a coil with a diameter of 500mm-1000mm, firmly bound with plastic straps or steel wires, and then put into cartons or woven bags. The cartons and woven bags are made of materials with high strength, which can protect the cable from external extrusion and collision. On the packaging, the product model, specification, length, rated voltage, production date, manufacturer and other information are clearly marked, which is convenient for users to identify and accept. At the same time, some precautions are also marked, such as "Do not invert", "Handle with care", "Moisture-proof and sun-proof", to remind transportation and storage personnel to handle the cable correctly.

In addition, for exported cables, the packaging also needs to meet international transportation standards and the requirements of relevant countries. For example, wooden cable reels treated with fumigation are used to prevent the spread of pests and diseases in the wood. The packaging also needs to have clear English labels and barcodes for customs inspection and logistics tracking.

The transportation process of the Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground electrical power cables needs to be carried out in strict accordance with relevant regulations to ensure the safety of the products.

Before transportation, a comprehensive inspection of the packaged cables is required to ensure that the cable reels are firm and reliable, the cables are neatly wound, the packaging is intact, and the labels are clearly visible. For large cable reels, forklifts or cranes are needed for loading and unloading. During loading and unloading, collision and extrusion should be avoided to prevent damage to the cable reels or rupture of the cable sheath. During the loading and unloading process, operators need to strictly abide by the operating procedures to ensure their own safety and product safety.

During transportation, the cable should be placed horizontally or vertically, avoiding inversion or excessive inclination. For long-distance transportation, the cable reels need to be fixed on the transport vehicle with ropes to prevent displacement or falling due to 颠簸 during driving. At the same time, the cable should be avoided from contact with other sharp objects or corrosive substances to prevent damage to the cable. The transport vehicle should choose a route with good road conditions, avoiding driving on rough roads to reduce vibration and impact on the cable.

Attention should also be paid to the impact of ambient temperature during transportation. Although Tr XLPE Insulation Material has good temperature resistance, it may still have a certain impact on the performance of the cable in extreme temperature environments. When transporting in high-temperature weather in summer, the cable should be avoided from being exposed to sunlight for a long time, and a sunshade cloth can be used to cover the cable to prevent the cable temperature from being too high; when transporting in low-temperature weather in winter, attention should be paid to preventing the cable from freezing to avoid the cable sheath from becoming brittle and breaking due to low temperature.

In addition, rainproof and moisture-proof measures need to be taken during transportation. If transporting in rainy days, it is necessary to ensure that the tarpaulin of the transport vehicle is intact to prevent rainwater from infiltrating into the cable packaging and affecting the quality of the cable. After the transport vehicle arrives at the destination, the cable should be unloaded and stored in a dry and ventilated warehouse in time.

The company has a complete delivery process to ensure that the Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground electrical power cables can be delivered to customers in a timely and accurate manner.

After the customer places an order, the sales department will promptly transmit the order information to the warehouse and production department. Warehouse managers will count and check the inventory cables according to the order requirements to ensure that the product model, specification, quantity, etc. are consistent with the order. If the inventory is insufficient, the production department will immediately arrange production, formulate a detailed production plan, and ensure that the production is completed and put into storage within the specified time.

Before delivery, warehouse managers will re-inspect the cables, check whether the packaging is intact, the labels are clear, and the appearance of the cables is damaged. At the same time, sampling tests will be conducted on the electrical performance of the cables to ensure that the product quality meets the requirements. After passing the inspection, the warehouse manager will arrange appropriate logistics vehicles for transportation according to the customer's requirements and transportation methods. For long-distance transportation, well-known and strong logistics companies will be selected, and transportation contracts will be signed with the logistics companies to clarify the responsibilities and obligations of both parties, including transportation time, transportation safety, cargo insurance, etc.

After delivery, the company will promptly feedback the logistics information 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. At the same time, the company will arrange special personnel to keep in contact with customers and logistics companies to timely handle problems arising during the delivery process. In case of damage or loss of goods during transportation, the company will promptly negotiate with the logistics company to solve the problem and ensure that the customer's interests are not damaged.

In addition, the company also provides expedited delivery services. For customers with urgent needs, production and delivery will be prioritized to ensure that the cables can be delivered to the customer in the shortest possible time. During the delivery process, the company will strictly abide by relevant laws, regulations and industry standards to ensure the legality and standardization of the delivery process.

To allow customers to better understand the performance and quality of the Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground electrical power cables, the company provides sample services.

Customers can apply for samples through phone calls, emails, online customer service, etc., indicating the model, specification, quantity and other information of the required samples. After receiving the sample application, the company will review the application within 1-3 working days. If approved, it will promptly arrange for the preparation of samples. The specifications and performance of the samples are consistent with those of mass-produced products, which can truly reflect the quality of the products.

The packaging of the samples is the same as that of bulk products to ensure that the samples are not damaged during transportation. At the same time, the samples will be accompanied by detailed product information, including product manuals, specification parameter tables, test reports, etc., to facilitate customers to consult and understand the detailed information of the products. For customers with special requirements, the company can also provide customized samples according to their needs, such as samples of specific lengths and colors.

Samples are usually sent by express. The company will choose express companies with good service quality and fast speed to ensure that the samples can be delivered to customers in a timely manner. After receiving the samples, customers can test and inspect the samples, such as testing the conductivity of the conductor, the insulation performance of the insulation layer, the mechanical properties of the sheath, etc. If customers are satisfied with the samples, they can place bulk orders according to the quality and performance of the samples; if customers have any questions or suggestions about the samples, the company will communicate with them in a timely manner, make improvements and adjustments until the customers are satisfied.

In addition, the company will record and track sample applications, understand customers' usage and feedback on samples, and continuously improve product and service quality. For long-term cooperative customers, the company will also regularly provide samples of new products to keep customers informed of the company's latest product information.

The company attaches great importance to after-sales service and provides customers with comprehensive after-sales guarantees to ensure that problems encountered by customers in the use of Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground electrical power cables can be solved in a timely manner.

During the warranty period of the product, if there is a quality problem, the company will handle it according to the specific situation. If it is a quality problem of the product itself, the company will replace the new product or repair it for the customer free of charge; if it is a problem caused by improper use or incorrect installation by the customer, the company will provide technical support and guidance to assist the customer in solving the problem.

The company has a professional after-sales service team. The after-sales service personnel have rich professional knowledge and experience and can respond to customers' needs in a timely manner. Customers can contact the after-sales service team through phone calls, emails, online customer service, etc., to put forward problems and needs. The after-sales service team will respond within 24 hours and formulate a solution within 48 hours.

In addition, the company will conduct regular return visits to customers to understand the use of products and customers' needs, and provide customers with necessary technical support and services. For example, the company can send technical personnel to the customer's site to guide the installation and laying of cables, and provide training on cable maintenance and maintenance for the customer's staff.

The company also establishes a complete after-sales service file, which records the customer's purchase information, product usage, after-sales service records and other information. This helps the company to better track the product status and provide more targeted after-sales services.

In the event of a product quality dispute, the company will actively cooperate with the customer to conduct investigations and analyses, and properly handle the dispute in accordance with relevant laws, regulations and contracts. The company is committed to protecting the legitimate rights and interests of customers and maintaining a good cooperative relationship with them.

To sum up, the Vvg-Ng series and 4c 25mm² Tr XLPE insulated pure copper underground electrical power cables have excellent performance in terms of specification parameters, characteristic uses, material styles and production processes. At the same time, the company provides comprehensive guarantees in packaging, transportation, delivery, samples and after-sales service, making these cables an ideal choice for underground power transmission, providing reliable power support for various underground power projects.