I. From the Perspective of the Product Itself
(I) Specification Parameters
This 4-core
Copper Flexible Power Cable made in China has a rich range of core specifications, covering various cross-sectional areas such as 25mm², 35mm², 70mm² and 240mm², which can meet the power transmission needs in different scenarios.
In terms of electrical performance parameters, the cable is suitable for power transmission and distribution systems with AC rated voltage of 0.6/1kV and below. Under the rated voltage, its insulation resistance is extremely high, which can effectively prevent current leakage and ensure the safety of power transmission. The DC resistance of the conductor meets relevant standards. The DC resistance of 25mm² conductor is not more than 0.727Ω/km, 35mm² is not more than 0.524Ω/km, 70mm² is not more than 0.268Ω/km, and 240mm² is not more than 0.078Ω/km. The low DC resistance ensures less loss during current transmission and improves the efficiency of power transmission.
In terms of mechanical properties, the cable has good tensile strength and elongation at break. The tensile strength of the insulation layer is not less than 12MPa, and the elongation at break is not less than 150%, which enables the cable to withstand a certain amount of tension without being damaged during installation and use. At the same time, the cable has excellent bending performance, with a minimum bending radius of 6 times the outer diameter of the cable (static bending) and 12 times (dynamic bending), which fully reflects its flexible characteristics and facilitates wiring in complex environments.
In addition, the temperature resistance of the cable varies with models. Due to the adoption of cross-linked polyethylene as the inner insulation layer and
PVC Sheath wrapped around the outer layer, the YJVR model has a wider temperature resistance range, with a long-term working temperature of up to 90℃, and the maximum temperature can reach 250℃ in case of short circuit (the longest duration does not exceed 5 seconds); while the VVR model directly uses PVC as insulation and sheath materials, with a long-term working temperature of 70℃ and a maximum temperature of 160℃ in case of short circuit.
(II) Characteristic Uses
Based on its various specifications and excellent performance, this 4-core copper
Flexible Power Cable has a wide range of applications in many fields.
The small cross-sectional cables of 25mm² and 35mm² are very suitable for household electricity scenarios due to their moderate current-carrying capacity. In the power distribution system of family residences, they can be used to connect high-power household appliances such as air conditioners, refrigerators and washing machines, as well as the main lines of lighting circuits, to ensure the stable supply of household electricity. At the same time, in small industrial equipment, such as small machine tools, blowers, water pumps, etc., these small cross-sectional cables can also meet their power transmission needs and ensure the normal operation of the equipment.
The 70mm² medium cross-sectional cable has a large current-carrying capacity and can meet the power transmission of medium-sized motors. In some small and medium-sized factories, the medium-sized motors used to drive the production line often need stable and sufficient power supply, and this specification cable can well accomplish this task. In addition, in the building power distribution system, for the power transmission from the main distribution box to the distribution box on some floors, the
70mm² Cable can also meet the needs of medium load and ensure the safe and stable power consumption in each area of the building.
The 240mm² large cross-sectional cable has a very large current-carrying capacity and is suitable for high-power transmission scenarios such as large factories, substations and high-voltage transmission branches. Large production equipment and heavy machinery in large factories need a lot of power support. This cable can effectively carry high current and ensure the stable operation of these equipment. In the substation, it can be used to connect the transformer and the distribution device to realize the distribution and transmission of electricity. In the high-voltage transmission branch, as an important power transmission carrier, it can efficiently transmit power from the main line to various power consumption areas.
Because the cable has flexible characteristics, it can also play an important role in some special scenarios. When embedding wiring in buildings, it is necessary to pass the cable through narrow spaces such as walls and floors. The flexible design enables the cable to bend easily, reducing construction difficulty and improving construction efficiency. When wiring inside the equipment, the internal space of the equipment is usually compact. The
Flexibility of the cable enables it to be arranged flexibly, avoiding the problem that it cannot be installed reasonably due to the hard cable. When threading pipes, the cable can pass through smoothly along the direction of the pipe, adapt to the bending and turning of the pipe, and ensure the normal transmission of electricity.
(III) Material and Style
Material
The conductor of the cable is made of high-purity copper with a purity of more than 99.9%. High-purity copper has excellent conductivity, which can reduce resistance loss during current transmission and improve power transmission efficiency. At the same time, copper has good ductility and toughness, so that the conductor can be processed into multiple strands of fine
Copper Wire, providing a basis for the flexible characteristics of the cable.
The insulation layer and sheath are made of polyvinyl chloride (PVC) material. PVC has good insulation performance, which can effectively isolate the conductor from the external environment and prevent safety accidents such as electric leakage and short circuit. It also has excellent corrosion resistance, which can resist the erosion of acids, alkalis, salts and other chemical substances and prolong the service life of the cable. In addition, PVC material has certain mechanical strength, which can protect the internal conductor from external mechanical damage.
The YJVR cable has a more special insulation layer structure. It uses cross-linked polyethylene as the inner insulation layer and PVC sheath wrapped around the outer layer. Cross-linked polyethylene has better high-temperature resistance and aging resistance, can maintain stable insulation performance in a higher temperature environment, and prolong the service life of the cable. At the same time, the mechanical strength of cross-linked polyethylene is also high, which further enhances the protection ability of the cable.
Style
In terms of appearance, the cable is usually black or gray. These two colors are more resistant to dirt and can be well integrated into various environments. The surface of the cable is smooth and flat, with no obvious protrusions or depressions, ensuring that no additional resistance is generated due to uneven surface during wiring.
The structural style of the cable varies with models. The structure of VVR cable is relatively simple. The conductor made of stranded multi-strand copper wire is directly wrapped with
PVC Insulation layer and sheath to form a whole. The YJVR cable is wrapped with cross-linked polyethylene insulation inner layer outside the conductor, and then wrapped with PVC sheath to form a double-layer insulation protection structure, which makes the cable more superior in performance.
Both types of cables adopt a conductor structure made of stranded multi-strand fine copper wires, which is the key to the flexible characteristics of the cable. The stranding method of multi-strand fine copper wires is carefully designed, so that the cable can disperse stress when bending, avoiding the problem that single-strand hard conductors are easy to break when bending.
(IV) Production Process
The production process of the cable strictly follows relevant domestic standards (such as GB/T 12706, etc.) and is carefully manufactured through multiple processes to ensure that the product quality meets the requirements.
The first is the manufacturing process of the conductor. High-purity copper ingots are processed into copper rods through smelting, casting and other processes, and then the copper rods are drawn into fine copper wires of different diameters through a wire drawing machine. These fine copper wires are stranded according to certain specifications and quantities. Advanced stranding equipment is used in the stranding process to ensure that the
Stranded Conductor structure is compact and uniform, with good flexibility and conductivity.
Next is the extrusion process of the insulation layer. For VVR cables, the stranded conductor is put into the extruder, and PVC material is evenly wrapped around the conductor through the extruder to form an insulation layer. In the extrusion process, parameters such as extrusion temperature and speed are strictly controlled to ensure that the insulation layer has uniform thickness, smooth surface and close combination with the conductor.
For YJVR cables, the cross-linked polyethylene insulation inner layer is first extruded outside the conductor. The extrusion process of cross-linked polyethylene is similar to that of PVC, but it needs to be cross-linked after extrusion. Cross-linking treatment usually adopts warm water cross-linking or steam cross-linking, through chemical reaction to make cross-linked polyethylene molecules form a three-dimensional network structure, so as to improve its high-temperature resistance and aging resistance. After the cross-linking treatment is completed, the PVC sheath is extruded outside.
Then there is the cabling process. The four conductors wrapped with insulation layer are stranded according to a certain stranding direction and pitch to form a 4-
Core Cable. During the stranding process, it is necessary to fill some filling materials between the conductors to ensure the roundness and structural stability of the cable. At the same time, a layer of wrapping tape will be wrapped during the cabling process to further enhance the structural strength of the cable.
Finally, the sheath extrusion process. The cabled cable core is put into the extruder, and the PVC sheath is extruded to wrap the entire cable core. The sheath extrusion process also needs to strictly control various parameters to ensure that the sheath has uniform thickness, smooth surface and close combination with the internal cable core.
During the production process, the cable will also undergo strict quality inspection. Including electrical performance testing (such as insulation resistance, DC resistance, etc.), mechanical performance testing (such as tensile strength, elongation at break, etc.), appearance quality testing, etc. Only cables that pass all tests can leave the factory to ensure reliable product quality.
II. From the Perspective of General Product Information
(I) Packaging
In order to ensure that the cable is not damaged during transportation and storage, the cable adopts a scientific and reasonable packaging method.
For short-length cables (usually within 100 meters), plastic reels are used for packaging. The plastic reel has certain strength and toughness, which can protect the cable from being squeezed and deformed during transportation. The cable is neatly wound on the reel and tightly wrapped with plastic film to prevent the cable from being eroded by dust, moisture, etc. The two ends of the reel are also equipped with baffles to prevent the cable from slipping off the reel.
For long-length cables (usually more than 100 meters), wooden cable reels are used for packaging. The wooden cable reel is strong and durable, can bear a large weight, and is suitable for long-distance transportation. The cable is tightly wound on the cable reel, and a certain tension is maintained during the winding process to ensure that the cable will not loosen. The outer layer of the cable is also wrapped with plastic film to play a role in moisture-proof and dust-proof. The side of the cable reel will also be marked with the model, specification, length, weight and other information of the cable, which is convenient for identification and handling.
In addition, the package will also be printed with the product's trademark, manufacturer's name, address, contact information and other information, as well as relevant safety warning signs (such as "Do not press heavily", "Moisture-proof", etc.) to remind users to pay attention to relevant matters during transportation and storage.
(II) Transportation
The transportation modes of the cable mainly include road transportation, railway transportation and waterway transportation. The appropriate transportation mode is selected according to factors such as transportation distance and quantity.
Road transportation has the characteristics of high flexibility and fast speed, and is suitable for short-distance transportation and small-batch cargo transportation. During transportation, special freight vehicles are used to stack the packaged cables neatly in the carriage and fix them firmly with ropes to prevent the cables from shaking and colliding during transportation. At the same time, attention should be paid to avoiding direct sunlight and rain, and the carriage should be kept dry and ventilated.
Railway transportation is suitable for medium and long-distance transportation and large-batch cargo transportation, with the advantages of large transportation volume and low cost. Cables are transported by railway freight trains, and they also need to be firmly fixed in the carriage to ensure safety during transportation. During transportation, the railway department will monitor the goods throughout the process to ensure that the goods arrive at the destination on time and safely.
Waterway transportation is suitable for long-distance transportation and international trade, with low transportation cost and large transportation volume. Cables are transported by cargo ships. During loading, attention should be paid to reasonably arranging the placement of goods to avoid collapse due to excessive stacking. At the same time, moisture-proof and anti-corrosion measures should be taken to ensure that the cable is not eroded by seawater during transportation.
In the process of transportation, relevant transportation regulations must be strictly observed. For overlong and overweight cable reels, corresponding transportation permits must be handled. During transportation, attention should also be paid to avoiding severe weather such as rainstorms, strong winds and high temperatures, so as not to damage the cables.
(III) Delivery
The company has a perfect delivery process to ensure that the cables can be delivered to customers in a timely and accurate manner.
After the customer places an order, the sales staff will communicate with the warehouse department in time to confirm the inventory status of the goods. If there is stock, the warehouse department will immediately arrange the outgoing preparation work, including checking the model, specification, quantity and other information of the product to ensure consistency with the order. If there is no stock, the production department will arrange production according to the order requirements to ensure that the production is completed and put into storage within the specified time.
Before the goods are delivered, the warehouse management personnel will re-inspect the cables, check whether the packaging is intact, whether the product information is accurate, etc. After passing the inspection, go through the delivery procedures and arrange transport vehicles. At the same time, the delivery information (such as transportation mode, license plate number, estimated arrival time, etc.) will be timely notified to the customer to facilitate the customer to prepare for receipt.
For urgent orders, the company will give priority to production and delivery to ensure that customer needs are met in the shortest time. During the delivery process, the transportation status of the goods will be tracked throughout the process, and problems arising during transportation will be handled in a timely manner to ensure that the goods can arrive on time.
(IV) Samples
In order to allow customers to better understand the performance and quality of the product, the company provides sample services.
Customers can apply for samples to the sales staff, indicating the model, specification and other information of the required samples. The sales staff will apply for samples from the warehouse department according to the customer's needs. The warehouse department will extract samples from qualified products and package them to ensure that the quality of the samples is consistent with that of bulk products.
Samples are usually sent to customers by express. The company bears the cost of samples, but the express fee is borne by the customer (except for special circumstances). After the sample is sent, the sales staff will timely inform the customer of the express tracking number to facilitate the customer to check the logistics status of the sample.
After receiving the sample, customers can conduct various performance tests and appearance inspections on the sample. If the customer is satisfied with the sample, they can place a bulk order according to the quality and performance of the sample. If the customer has any questions or suggestions about the sample, the sales staff will communicate with the customer in a timely manner and make corresponding adjustments and improvements.
(V) After-sales Service
The company has a professional after-sales team to provide customers with comprehensive after-sales service to ensure that problems encountered by customers during use can be solved in a timely manner.
During the cable installation process, if customers encounter technical problems, they can contact the after-sales team at any time. The after-sales personnel will provide technical guidance to customers through telephone, video and other means to assist customers in successfully completing the installation work.
If the cable has quality problems during use, customers can apply for after-sales service to the company. The company will arrange professional technicians to check and analyze the problem to determine the cause of the problem. If it is a quality problem of the product itself, the company will handle the return or exchange according to the customer's requirements and bear the corresponding costs. If the problem is caused by improper use by the customer, the company will provide corresponding maintenance services and charge reasonable maintenance fees.
In addition, the company will also conduct regular return visits to customers to understand the use of cables, collect customers' opinions and suggestions, and continuously improve product and service quality. Provide customers with product instruction manuals and maintenance manuals to guide customers to use and maintain cables correctly and prolong the service life of cables.
In a word, the company is committed to providing customers with high-quality products and high-quality services. Every link from production, packaging, transportation, delivery to after-sales service is strictly controlled to ensure customer satisfaction.
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