Vvg, Pvvg, Avvg, Apvvg Power Cable for 0.66, 1 and 3 Kv

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Low voltage cable
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2025-08-07 06:35:52

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Product Introduction

Detailed Description of Vvg, Pvvg, Avvg, Apvvg Power Cables (0.66, 1, 3kV)

I. From the Perspective of the Product Itself

(I) Specification Parameters

The Vvg, Pvvg, Avvg, and Apvvg series Power Cables have detailed and clear divisions in specification parameters to meet the power transmission needs of different scenarios.

In terms of rated voltage, these four types of cables all cover three levels: 0.66kV, 1kV, and 3kV. The 0.66kV level is suitable for short-distance and low-power power transmission in low-voltage distribution systems, such as branch circuits in homes and power supply lines for small shops; the 1kV level has a wider range of applications, which can be used for equipment power supply in industrial plants and distribution trunks of medium-sized buildings; the 3kV level is mainly used in medium and low-voltage power transmission scenarios, such as branches of urban power grids and internal connection lines of new energy Power Stations.

The conductor cross-sectional specifications are rich, ranging from 1.5mm² to 240mm². Small cross-sectional cables such as 1.5mm² and 2.5mm² are suitable for power supply of lighting circuits and small household appliances; 4mm² and 6mm² cables can be used for power supply of high-power household appliances such as air conditioners and refrigerators, as well as small motors; cross-sections of 10mm² and above are mostly used for industrial equipment, building distribution trunks, etc. Taking a 10mm² cable as an example, the current-carrying capacity of a Copper Conductor (Vvg, Pvvg) when laid in air is about 55A, and that of an Aluminum Conductor (Avvg, Apvvg) is about 45A. As the cross-section increases, the current-carrying capacity also increases accordingly. The current-carrying capacity of a 240mm² Copper Conductor Cable can reach more than 400A, and that of an aluminum conductor is more than 300A.

Insulation resistance is an important parameter to measure the insulation performance of cables. The insulation resistance of the PVC Insulation layer of the four types of cables is all ≥10¹⁴Ω·m, which can effectively prevent current leakage and ensure the safety of power transmission. In terms of temperature resistance, the long-term working temperature is 70℃, which can meet the needs of most conventional working conditions; in case of short circuit (maximum 5 seconds), it can withstand a high temperature of 160℃, providing a certain safety buffer in case of circuit failure.

In terms of mechanical properties, the outer PVC Sheath has a tensile strength of ≥12MPa and an elongation at break of ≥150%, which has good tensile and deformation resistance and can resist external mechanical damage such as extrusion and friction. The bending performance is excellent, with a minimum bending radius of 6-12 times the outer diameter of the cable. Among them, the non-armored Vvg and Avvg have better bending performance, with a minimum bending radius of 6 times the outer diameter (static) and 10 times the outer diameter (dynamic). The armored Pvvg and Apvvg have a slightly larger minimum bending radius due to the armored layer, which is 8 times the outer diameter (static) and 12 times the outer diameter (dynamic), facilitating wiring construction in complex environments.

For armored models (Pvvg, Apvvg), the thickness of the Steel Tape armor layer is usually 0.3mm-0.5mm, which can effectively improve the cable's resistance to mechanical damage, can withstand a certain pressure and impact force, and is suitable for direct burial and other environments vulnerable to external forces. Some models can choose steel wire armoring. The diameter of the steel wire varies according to the cable specification, generally 1mm-2mm, which further enhances the tensile strength of the cable and is suitable for vertical laying or occasions with high tension requirements.

(II) Characteristic Uses

The Vvg, Pvvg, Avvg, and Apvvg series power cables have distinct characteristic uses in different fields due to their respective characteristics.

As a copper conductor and non-Armored Cable, Vvg cable is suitable for occasions with high requirements for conduction efficiency and stability because of its excellent conductivity of copper conductor. In the construction field, it is often used in the internal distribution trunks of large buildings such as office buildings and hotels. It is openly laid in the trunking or bridge of ceilings and walls, and can efficiently distribute electricity to various areas. In industrial scenarios, it can connect precision instruments, automated production lines and other equipment with high requirements for power quality to ensure the stable operation of the equipment. In addition, in some civil occasions with high requirements, such as the main line power supply of high-end residences, Vvg cable is also an ideal choice.

Pvvg cable adds a steel tape armor layer on the basis of Vvg, which greatly improves the resistance to mechanical damage and is suitable for direct burial or environments vulnerable to external impact. In factory areas, it is often used for underground direct burial power transmission to connect the distribution systems of various workshops, and can resist external influences such as vehicle rolling and soil extrusion. In urban construction, it can be used as a branch of the urban power grid, buried under roads to supply power to surrounding residential areas and commercial facilities. In outdoor open environments, such as mines, docks and other places, Pvvg cable can withstand the test of wind, sun and object collision, ensuring the continuous transmission of electricity.

Avvg cable adopts aluminum conductor and non-armored structure, balancing performance and cost, with lighter weight, suitable for long-distance laying or scenarios with high lightweight requirements. In the transformation of rural power grids, it can be used for long-distance transmission lines, extending from substations to various villages, reducing the self-weight and erection cost of the lines. In some large venues, such as temporary power supply lines in gymnasiums and exhibition centers, Avvg cables are easy to carry and lay, and can meet the short-term high-intensity power demand. At the same time, in some industrial fields sensitive to cost, such as equipment connection in small and medium-sized processing plants, Avvg cables can also play a good role.

Apvvg cable combines the advantages of aluminum conductor and steel tape armor, with both lightweight and high protection, suitable for scenarios with high cost performance and requiring armor protection. In new energy power stations, such as photovoltaic power stations and wind farms, Apvvg cables can be used to connect solar panels, wind turbines and combiner boxes, which can not only adapt to the complex outdoor environment but also reduce the construction cost of the power station. In the power supply systems along highways and railways, it can be buried under the roadbed to supply power to signal lights, monitoring equipment, etc., and withstand vehicle vibration and soil pressure. In addition, in some remote areas' transmission lines, Apvvg cables can ensure transmission efficiency while reducing construction and maintenance costs.

(III) Material and Style

Material

In terms of Conductor Materials, Vvg and Pvvg use high-purity copper (purity ≥99.9%). Copper has excellent conductivity and high conductivity, which can effectively reduce losses during current transmission and ensure efficient transmission of electricity. Copper has good ductility and toughness, which is easy to be processed into multi-strand Stranded Conductor structure, enhancing the Flexibility of the cable. At the same time, copper has high chemical stability, is not easy to be corroded in normal use environment, and can maintain good conductivity for a long time.

Avvg and Apvvg use high-purity aluminum (purity ≥99.5%). Although the conductivity of aluminum is not as good as that of copper, it is light in weight, with a density of only about 1/3 of that of copper, which greatly reduces the self-weight of the cable and is convenient for long-distance laying and handling. The cost of aluminum is relatively low, which can effectively control the overall cost of the cable. In addition, aluminum will form a dense oxide film in the air, which has good corrosion resistance and is suitable for use in outdoor environments.

The insulation layer and sheath are made of polyvinyl chloride (PVC) material. The PVC insulation layer has good insulation performance, which can effectively isolate the conductor from the outside world and prevent electric leakage and short circuit accidents. It has good chemical stability, is resistant to the erosion of acids, alkalis, salts and other chemical substances, and can adapt to a variety of complex environments. PVC material has excellent processing performance and is easy to form a uniform insulation layer and sheath through extrusion process.

For the armor layer, Pvvg and Apvvg use steel tape or steel wire. Steel tape armor usually uses low-carbon steel plates, which have high mechanical strength and toughness, can provide effective mechanical protection for cables, and resist external extrusion and impact. Steel wire armor uses high-strength steel wire, which has high tensile strength and is suitable for occasions that need to bear large tension, such as vertically laid cables.

Style

In terms of appearance, all four types of cables are cylindrical with smooth and flat surfaces. Vvg and Avvg are non-armored cables with a PVC sheath on the outer layer, usually black or gray. Black has good weather resistance, can absorb sunlight and heat, and reduce the impact of temperature changes on the cable. Gray is easier to coordinate with the surrounding environment in some indoor environments.

Due to the steel tape armor layer, Pvvg and Apvvg are slightly thicker than non-armored cables in appearance. The armor layer is inside the sheath, which looks similar to non-armored cables from the outside but feels harder. Some models with steel wire armor can vaguely see the outline of steel wires in appearance, which better reflects their high-strength characteristics.

The conductor structure is a multi-strand stranded design. Multiple strands of fine Copper Wires or Aluminum Wires are stranded together according to a certain lay direction and pitch to form a Flexible Conductor with good conductivity. This stranded structure makes the cable have good bending performance, which is convenient for installation and laying in narrow spaces and complex environments.

The insulation layer is tightly wrapped around the outside of the conductor, closely fitting with the conductor, without bubbles and gaps, ensuring the insulation effect. The sheath is evenly wrapped around the insulation layer or armor layer to form a solid protective layer. The surface of the sheath is printed with the model, specification, rated voltage and other marks of the cable, which are clear and easy to identify.

(IV) Production Process

The production process of Vvg, Pvvg, Avvg, and Apvvg series power cables is rigorous and complex, ensuring the quality and performance of the products.

Conductor manufacturing is the first step in production. For Copper Conductors, high-purity copper ingots are smelted and cast into copper rods, and then the copper rods are drawn into copper wires of different diameters through a wire drawing machine. During the wire drawing process, the drawing speed and die precision are strictly controlled to ensure that the diameter of the copper wire is uniform and the surface is smooth. Then, according to the cross-sectional specification of the cable, multiple strands of copper wire are stranded according to a certain stranding scheme. During stranding, the tension of each strand of copper wire is ensured to be uniform, and the stranding direction and pitch meet the design requirements to form a Flexible Copper conductor.

The manufacturing process of Aluminum Conductors is similar to that of copper conductors. High-purity aluminum ingots are smelted and cast into aluminum rods, then drawn into Aluminum Wires, and then stranded. Because aluminum has low hardness, more attention should be paid to controlling the force during wire drawing and stranding to avoid aluminum wire breakage.

Insulation layer extrusion is a key process. The stranded conductor is fed into the extruder, and at the same time, the PVC Insulation Material is heated and melted, and evenly wrapped around the outside of the conductor through the extrusion die to form an insulation layer. During the extrusion process, the extrusion temperature, 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 bubbles, impurities and other defects. The extruded Insulated Wire core shall be cooled to quickly solidify the insulation layer.

For armored cables (Pvvg, Apvvg), armor treatment is required outside the insulated wire core. In the case of steel tape armoring, low-carbon steel tape is wrapped around the insulated wire core through an armoring machine. During the wrapping process, the tension and overlap of the steel tape are controlled to ensure that the armor layer is tight and flat, and can effectively protect the internal structure. Steel wire armoring is to wrap high-strength steel wires around the insulated wire core according to a certain pitch, and the uniformity and firmness of the wrapping must also be ensured.

Sheath extrusion is the last main process. The wire core after insulation or armor treatment is fed into the sheath extruder. The PVC sheath material is heated and melted in the extruder, and then wrapped around the wire core through a die to form a sheath. The extrusion parameters are adjusted according to the cable specification to ensure that the thickness of the sheath is uniform, the surface is smooth, and it is closely combined with the internal structure. The extruded cable is cooled and pulled to form a finished cable.

During the production process, multiple quality inspections are also required. Including DC resistance test of conductor, insulation resistance and withstand voltage test of insulation layer, mechanical performance test of sheath, etc. Each process has strict quality control standards, and only products that pass the inspection can enter the next process. The finished cable also needs to undergo overall performance tests, such as bending test and flame retardant test, to ensure that it meets relevant national standards and design requirements.

In addition, the control of the production environment is also crucial. The workshop shall be kept clean and dry, and the temperature and humidity shall be controlled within an appropriate range to avoid the impact of dust, moisture, etc. on product quality. Production equipment shall be maintained regularly to ensure its normal operation and improve production efficiency and product quality stability.

II. From the Perspective of General Product Information

(I) Packaging

To ensure the quality of Vvg, Pvvg, Avvg, and Apvvg series power cables during transportation and storage, the packaging method is carefully designed.

For short-length cables (usually within 100 meters), plastic reels are used for packaging. The plastic reels are made of high-strength polyethylene material, which has certain compression and wear resistance. The cable is neatly wound on the reel, and appropriate tension is maintained during winding to avoid loose cables. After winding, the entire reel and cable are tightly wrapped with plastic film to play a role in moisture-proof and dust-proof. Both ends of the reel are equipped with circular baffles to prevent the cable from sliding off the reel. The baffles are printed with the model, specification and other information of the product.

For long-length cables (usually more than 100 meters), wooden cable reels are used for packaging. The wooden cable reel is made of high-quality hardwood, with a solid structure and can bear a large weight. The cable is tightly wound on the cable reel, and the number of winding layers and tension are strictly controlled to prevent the cable from loosening or deforming during transportation. The outer layer of the cable is wrapped with plastic film to prevent moisture and dust. Both sides of the wooden cable reel are equipped with metal flanges, and the flanges are provided with multiple holes to facilitate handling and loading/unloading with forklifts and other equipment. A label is nailed on the cable reel, indicating the model, specification, length, weight, manufacturer, production date and other detailed information of the cable.

Whether it is a plastic reel or a wooden cable reel, obvious warning signs such as "Do not press heavily", "Moisture-proof", "Up" are printed on the outside of the package to remind transportation and storage personnel to pay attention to operating specifications and avoid damage to the cable. For armored cables, due to their heavy weight, additional reinforcement measures will be taken during packaging, such as adding supports at the bottom of the cable reel to ensure stability during transportation.

(II) Transportation

The transportation of Vvg, Pvvg, Avvg, and Apvvg series power cables requires selecting an appropriate transportation method according to factors such as distance and quantity, and taking corresponding protective measures.

Road transportation is a commonly used transportation method, suitable for short-distance and medium-distance transportation. The transport vehicles are closed trucks or semi-trailers to prevent the cables from being exposed to direct sunlight, rain and dust pollution. During loading, the packaged cable reels are neatly placed in the carriage, and wooden boards or buffer materials are placed between the cable reels to avoid mutual collision. For wooden cable reels, steel wire ropes or fastening belts are used to firmly fix them on the carriage to prevent shaking during transportation. During transportation, the driver must control the speed, avoid sudden braking and sharp turns, and reduce the impact force on the cable.

Railway transportation is suitable for long-distance and large-volume cable transportation, with the characteristics of large transportation volume, low cost and good stability. Cables are transported by railway freight trains. When loading, the cable reels are fixed in the designated position of the freight car to ensure no displacement. During transportation, moisture-proof and dust-proof measures shall be taken, such as covering with waterproof cloth. The railway department will monitor the goods throughout the process to ensure transportation safety.

Waterway transportation is mainly used for international trade or long-distance coastal transportation. When loading cables, the cable reels are reasonably placed in the cabin to avoid stacking too high and prevent the bottom cable reels from being crushed and damaged. During transportation, attention shall be paid to ventilation and moisture-proof in the cabin to avoid damage to the cable due to moisture. At the same time, the cable reel shall be fixed to prevent movement due to 颠簸 during the ship's navigation.

No matter which transportation method is adopted, the cable shall be avoided from severe collision, extrusion and excessive bending. Transport personnel must be familiar with the characteristics and transportation requirements of the cable, and handle it with care during loading and unloading to ensure that the cable is delivered to the destination safely and on time.

(III) Delivery

The company has established a perfect delivery process to ensure that Vvg, Pvvg, Avvg, and Apvvg series power cables can be sent to customers in a timely and accurate manner.

After the customer places an order, the sales department quickly transmits the order information to the warehouse department. After receiving the order, the warehouse manager first reviews the order to confirm whether the information such as the model, specification and quantity of the cable is accurate. Then, according to the order information, find the corresponding goods in the warehouse. After finding the goods, check whether the packaging and labels of the cables are consistent with the order.

Before delivery, the warehouse manager conducts a final inspection of the cables, checking whether the appearance is intact, the packaging is damaged, and the labels are clear. After passing the inspection, go through the outbound procedures and fill in the outbound list, which records the details of the cables and customer information in detail.

For cables that need to be transported, the warehouse department contacts the cooperative logistics company and selects the appropriate transportation method and vehicle type according to the quantity, weight and transportation distance of the goods. The logistics company arranges vehicles to pick up the goods at the warehouse. The warehouse manager and the driver check the quantity and information of the goods together. After confirmation, the goods are loaded into the vehicle and the handover procedures are completed.

After the delivery is completed, the sales department promptly notifies the customer of the delivery information, 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. The company keeps detailed records of the delivery process, including delivery time, goods information, transportation method, etc., for future inquiry and traceability.

For urgent orders, the company activates an expedited processing process, giving priority to production and delivery to ensure that customer needs are met in the shortest possible time. If problems are encountered during the delivery process, the company promptly communicates and coordinates with customers and logistics companies to solve them as soon as possible to ensure the smooth progress of delivery.

(IV) Samples

To enable customers to better understand the performance and quality of Vvg, Pvvg, Avvg, and Apvvg series power cables, the company provides sample services.

Customers can apply for samples by phone, email, online customer service, etc., specifying the model, specification, quantity and other information of the required samples. After receiving the application, the sales staff communicates with the customer in a timely manner to confirm the specific requirements and purposes of the samples and provide appropriate samples for the customer.

Samples are selected from the production line, with the same quality as bulk products. The length is usually 1-5 meters, which can be adjusted according to customer requirements. After the samples are prepared, they undergo the same quality inspection as the finished products to ensure that the performance indicators meet the standards.

Samples are packaged in small plastic reels or sealed bags, with the model, specification, manufacturer and other information marked on the package. They are sent to customers by reputable express companies with fast transportation speed. The sample cost is usually borne by the company, and the express fee is generally borne by the customer, which can be negotiated under special circumstances.

After receiving the samples, customers can conduct appearance inspections, performance tests, etc., to evaluate whether they meet their needs. If there are any questions or suggestions, the sales staff will communicate in a timely manner and provide detailed answers and technical support. After the customer is satisfied, they can place bulk orders based on the quality and performance of the samples.

The company records the sample application and delivery situation, including customer information, sample model, delivery time, etc., to facilitate customer tracking and service. Through sample services, it can better communicate with customers, understand their needs and improve customer satisfaction.

(V) After-sales Service

The company attaches great importance to the after-sales service of Vvg, Pvvg, Avvg, and Apvvg series power cables and has established a professional after-sales team to provide comprehensive support.

During the installation process, if customers encounter technical problems, the after-sales team will provide guidance at any time. Customers can contact after-sales personnel by phone, video, etc. After-sales personnel provide detailed installation steps and precautions according to the problems to guide the correct installation. For complex installation scenarios, technical personnel can be arranged for on-site guidance to ensure the smooth progress of installation.

If customers find quality problems with the cables during use, such as damage to the insulation layer, conductor breakage, etc., they can apply for after-sales service. Customers need to provide purchase vouchers, model specifications, problem descriptions and related photos, etc. After receiving the application, the after-sales team will contact the customer within 24 hours to understand the specific situation and arrange technical personnel to analyze and judge.

After verification, if it is confirmed that it is a quality problem of the cable itself, the company will handle the return or replacement according to the customer's requirements. During the return or replacement process, the company bears the relevant transportation costs and replaces the qualified cables for the customer as soon as possible. If the problem is caused by improper use or incorrect installation by the customer, the after-sales team will provide solutions for the customer, such as maintenance suggestions and technical guidance, to help the customer solve the problem.

In addition, the company regularly conducts return visits to customers to understand the use of cables, collect customer feedback and suggestions, and continuously improve product quality and service levels. The company also provides customers with product instruction manuals and maintenance guides, which detail the installation, use, maintenance and other matters of the cables to help customers use and maintain the cables correctly and extend their service life.

The after-sales team is composed of experienced technicians and customer service personnel who have received professional training and are proficient in the performance and use of cables. They can quickly respond to customer needs and provide efficient and professional solutions. The company's after-sales service commitment is to ensure customer satisfaction and continuously improve the after-sales service system to provide customers with more reliable and thoughtful services.