I. From the Perspective of the Product Itself
(1) Specification Parameters
The specification parameters of this underground SWA cable are the basis for its performance and application scope. Each parameter is carefully designed to meet the power transmission needs in different scenarios.
In terms of rated voltage, the cable is 0.6/1kV, which belongs to the category of low-
Voltage Cables. Among them, 0.6kV represents the phase voltage of the cable, and 1kV is the line voltage. This voltage setting enables it to be widely used in distribution networks with a rated voltage of 1kV and below, covering power distribution scenarios in industrial, civil, municipal and other fields. It can be well adapted to internal power distribution in small factories, power supply in residential communities, and power transmission for urban road lighting.
The conductor specification is another important parameter of the cable. It adopts a design of
4 Cores of 120mm² plus 1 core of 185mm². The 4 cores of 120mm² are mainly used to transmit the phase lines and neutral lines of three-phase alternating current, and this specification can meet the power supply needs of most three-phase loads. The cross-sectional area of 120mm² can ensure sufficient current-carrying capacity during current transmission and control the resistance within a reasonable range to reduce energy loss. The 1 core of 185mm² is usually used as a
Grounding Wire (PE line). The larger cross-sectional area makes its grounding resistance smaller, which can quickly conduct fault current into the ground in case of leakage or short-circuit faults, greatly improving the safety of the power system.
The outer diameter of the cable is also a key parameter. Although different production processes and materials may lead to slight differences in outer diameter, generally speaking, the outer diameter of the cable is accurately calculated to ensure that it can smoothly pass through pipes or adapt to the space requirements for direct burial during laying. At the same time, a reasonable outer diameter design is also conducive to the heat dissipation of the cable, ensuring its stability during long-term operation.
In addition, the insulation thickness and sheath thickness of the cable are also strictly regulated. The insulation layer is made of XLPE material, and its thickness can effectively withstand the electric field strength under the rated voltage to prevent insulation breakdown. The sheath is made of PVC material, and sufficient thickness ensures its protective effect on the internal structure, which can resist external mechanical damage and environmental erosion.
(2) Characteristic Applications
Based on its unique specification parameters and performance characteristics, this underground SWA cable has a wide range of characteristic applications.
In the industrial field, it is an ideal choice for many factories and production workshops. There are many equipment in industrial plants, with large power demand and complex loads. Large three-phase equipment such as three-phase asynchronous motors and electric welders need a stable three-phase power supply. The 4-core 120mm² conductor can meet the power transmission needs of these equipment. At the same time, the industrial environment is often complex, with mechanical vibration, dust, oil stains and other conditions. The steel armoring and
PVC Sheath of the cable can provide good protection, ensuring the stability and safety of power transmission. The
1-Core 185mm² grounding wire provides protection for the safe operation of industrial equipment, avoiding safety accidents caused by equipment leakage.
In the civil field, the power distribution system of residential communities uses this cable in large quantities. With the improvement of people's living standards, there are more and more electrical equipment in families, and the demand for electricity is also growing. The distribution room of the community needs to distribute electricity to each building, and then from the building to each household. The cable can efficiently and stably complete this power transmission process. The 4-core 120mm² conductor can meet the needs of multiple households using electricity at the same time, ensuring the normal operation of various electrical appliances such as air conditioners, refrigerators and televisions. The steel armoring structure enables it to withstand soil pressure and possible external impact when laid underground in the community, ensuring the continuity of power supply.
In municipal engineering, the cable also plays an important role. Urban road lighting, traffic lights, power supply for municipal squares, etc., are inseparable from it. In the road lighting system, cables need to be buried underground, withstanding the test of vehicle rolling and rain soaking. The protective performance of its steel armoring and PVC sheath can ensure the normal operation of the cable. In the power transmission of traffic lights, stable power supply is crucial. The reliability of the cable can ensure the normal operation of traffic lights and ensure road traffic safety.
In addition, the cable is also widely used in some special places, such as large shopping malls, hospitals, gymnasiums, etc. These places have a large flow of people, concentrated power demand, and extremely high requirements for the safety and stability of power supply. The high performance and high reliability of the cable can meet these requirements and provide stable power guarantee for people's activities.
(3) Material and Style
The cable fully considers performance, safety and applicability in material selection and style design.
The conductor uses high-purity copper core. As an excellent conductive material, copper has many advantages. High-purity copper can reduce resistance, reduce energy loss during current transmission, and improve power transmission efficiency. At the same time, copper has good thermal conductivity, and the heat generated when current passes through can be dissipated in time to avoid damage to the cable due to overheating. In addition, copper has high mechanical strength, is not easy to break, and can adapt to stretching, bending and other operations during underground laying, ensuring the service life of the cable.
The insulation layer is made of XLPE (cross-linked polyethylene) material, which is an excellent insulating material. XLPE has good electrical insulation performance, can withstand high voltage, and effectively prevent electric leakage accidents. Its temperature resistance is also very excellent, with a wide operating temperature range, which can run stably in the environment of -40℃ to 90℃. Even in high temperature in summer or severe cold in winter, it can ensure the normal operation of the cable. Moreover, XLPE has strong chemical corrosion resistance, which can resist the erosion of moisture, acid and alkali substances in underground soil on the insulation layer, and prolong the service life of the cable.
The sheath is made of PVC (polyvinyl chloride) material. PVC has good mechanical strength, wear resistance and flame retardancy. As a sheath material, it can provide solid physical protection for the internal conductors and insulation layers of the cable, preventing mechanical damage caused by collision, friction, etc. during cable laying and handling. At the same time, the wear resistance of PVC enables the cable to resist external wear during long-term use and maintain the integrity of the sheath. Its flame retardant performance is also important, which can delay the spread of fire and reduce the loss caused by fire.
In terms of style, the cable adopts a steel wire armoring (SWA) structure, that is, one or more layers of
Steel Tape armoring are added inside the sheath. This style design greatly enhances the mechanical protection ability of the cable, enabling it to withstand large tension, pressure and impact force. The steel armoring structure makes the cable suitable for underground installation methods such as direct burial and pipe laying, and can effectively resist damage from external factors such as soil pressure, stone extrusion and vehicle rolling, ensuring the safe operation of the cable.
(4) Production Process
The production process of this underground SWA cable is complex and rigorous, and each link is strictly controlled to ensure product quality.
The first is the manufacture of conductors. High-purity copper materials are used, and copper billets meeting the requirements are obtained through smelting, ingot casting and other processes. Then, through the drawing process, the copper billet is drawn into
Copper Wires of the required diameter. During the drawing process, it is necessary to control the drawing speed and tension to ensure the dimensional accuracy and mechanical properties of the copper wire. After that, multiple copper wires are twisted together to form a conductor. The twisting process can improve the
Flexibility and current-carrying capacity of the conductor.
Next is the extrusion of the insulation layer. Using cross-linked polyethylene material, it is evenly coated on the surface of the conductor through an extruder to form an insulation layer. During the extrusion process, it is necessary to accurately control the extrusion temperature, speed and pressure to ensure that the insulation layer has uniform thickness, smooth surface and close combination with the conductor. After extrusion, cross-linking treatment is also required. The polyethylene molecules are cross-linked by heating and other methods to form a three-dimensional network structure, thereby improving the temperature resistance, mechanical strength and electrical properties of the insulation layer.
Then there is the cabling process. The 4-core 120mm²
Insulated Wire core and 1-core 185mm² grounding wire are combined together according to a certain twisting method to form a cable core. During the cabling process, it is necessary to use filling materials to fill the gaps between the cable cores to ensure the roundness and stability of the cable core. At the same time, a cushion layer needs to be wrapped around the cable core to play a buffering and protective role.
Steel armoring is an important part of the cable production. One or more layers of steel tape are wrapped around the cable core. The material and thickness of the steel tape are strictly selected to ensure the strength and flexibility of the armoring layer. During the armoring process, the steel tape needs to be evenly wrapped around the cable core with a certain overlap to improve the protective effect of the armoring layer.
Finally, the extrusion of the sheath. The polyvinyl chloride material is coated on the outside of the steel armoring layer through an extruder to form a sheath. The extrusion process also needs to accurately control various parameters to ensure that the sheath has uniform thickness, smooth surface and close combination with the armoring layer. After the sheath extrusion is completed, cooling, curing and other treatments are also required to make the sheath meet the specified performance requirements.
During the entire production process, a number of quality inspections are also required, such as conductor resistance test, insulation resistance test, withstand voltage test, mechanical performance test, etc., to ensure that each batch of cables meets relevant standards and requirements.
II. From the Perspective of General Product Information
(1) Packaging
In order to ensure the quality of the cable during transportation and storage, the underground SWA cable adopts a scientific and reasonable packaging method.
Cables are usually packaged in a coiled form, that is, the cable is wound on a cable reel. There are two types of cable reels: wooden and steel. The appropriate material is selected according to the specification and weight of the cable. For this cable, due to its large cross-sectional area and heavy weight, steel cable reels are generally used to ensure sufficient strength and prevent damage during transportation.
When winding the cable, it is necessary to wind it according to the specified tension to avoid excessive relaxation or tightness of the cable. After winding, the outer layer of the cable is wrapped with a waterproof and moisture-proof plastic film to prevent the cable from being eroded by moisture during storage and transportation. At the same time, solid baffles are installed on the sides and both ends of the cable reel to prevent the cable from slipping during transportation.
Each cable reel is affixed with a detailed label, which indicates the product name, specification model, length, weight, production batch number, production date, implementation standard and other information, facilitating users' identification and acceptance. In addition, product certificates and quality guarantees will be placed on the cable reel to prove that the product quality meets relevant standards.
For exported products, the packaging also needs to comply with international transportation standards and the relevant requirements of the destination country, such as using fumigated wooden cable reels to prevent the spread of pests and diseases. At the same time, the marks on the packaging need to be in English or the official language of the destination country to facilitate customs inspection and user identification.
(2) Transportation
The transportation of the underground SWA cable needs to follow strict regulations and procedures to ensure that the cable is not damaged during transportation.
Before transportation, the cable reel needs to be firmly fixed to prevent rolling or collision during transportation. For road transportation, flatbed trucks are usually used. The cable reel is placed on the truck and fixed on the carriage with steel wire ropes or chains to ensure that the cable reel does not move during transportation. For railway transportation and sea transportation, loading and fixing must also be carried out in accordance with the corresponding transportation specifications.
During transportation, it is necessary to avoid severe vibration, impact, exposure to sunlight and rain on the cable reel. In high temperature in summer, sunshade measures need to be taken to prevent the cable from aging due to high temperature; in severe cold in winter, attention needs to be paid to keeping warm to avoid the cable from becoming brittle due to low temperature. At the same time, transport vehicles need to abide by traffic rules and avoid sudden braking, sharp turns and other operations to reduce the impact on the cable.
Professional escorts are also required during transportation to monitor the transportation status of the cable and timely handle problems arising during transportation. The escorts need to be familiar with the performance and transportation requirements of the cable and be able to take correct response measures in case of emergencies.
In addition, the transportation time also needs to be reasonably arranged, and transportation in severe weather conditions should be avoided as much as possible. In case of force majeure factors such as rainstorms, heavy snow, earthquakes, etc., it is necessary to take protective measures in time to ensure the safety of the cable.
(3) Delivery
In order to ensure that users can receive qualified products in a timely manner, the delivery process of the cable is rigorous and efficient.
Before delivery, sales personnel need to confirm the order information with the user, including product name, specification model, quantity, delivery address, delivery time, etc., to ensure that the information is accurate. Then, warehouse managers retrieve the corresponding products from the warehouse according to the order information and conduct strict inspection on the products, checking whether the packaging of the products is intact, whether the labels are clear, whether the products meet the order requirements, etc.
After passing the inspection, the warehouse manager arranges the products for delivery and goes through the relevant delivery procedures. At the same time, the transportation department is notified to arrange transportation vehicles and personnel to ensure that the products are delivered within the specified time.
During the delivery process, it is necessary to timely notify the user of the delivery information, including the license plate number of the transport vehicle, the driver's contact information, the estimated arrival time, etc., to facilitate the user to prepare for receipt. At the same time, sales personnel need to track the transportation status of the goods and timely feedback the location and transportation progress of the goods to the user.
If users have special requirements for delivery, such as expedited delivery, designated transportation methods, etc., the enterprise will try its best to meet the users' needs, adjust the delivery plan, and ensure that users can receive the products on time.
(4) Samples
In order to allow users to fully understand the performance and quality of the product before purchasing, the enterprise provides sample services.
Users can apply for samples from the enterprise, indicating the specification model, quantity and other information of the required samples. After receiving the sample application, the enterprise will prepare corresponding samples according to the user's needs. The specifications and performance of the samples are consistent with the mass-produced products, which can truly reflect the quality level of the products.
Samples are usually sent to users within a specified time, and the way of sending samples can be by express, logistics, etc., according to the user's requirements. At the same time of sending samples, relevant materials of the samples, such as product specifications, inspection reports, etc., will be attached to facilitate users to test and evaluate the samples.
After receiving the samples, users can conduct various performance tests on them, such as conductor resistance test, insulation resistance test, withstand voltage test, etc., to verify whether the product meets their own needs. If users are satisfied with the samples, they can place bulk orders; if there are any questions or suggestions, the enterprise will communicate with users in a timely manner to make improvements and adjustments.
(5) After-sales Service
Perfect after-sales service is the enterprise's commitment to users and an important guarantee to ensure users' interests.
During the installation and use of the product, if users encounter any problems, they can contact the enterprise's after-sales service department at any time. After-sales service personnel will respond to users' needs in a timely manner and provide technical support and solutions through telephone, email, etc.
If the product has quality problems, within the warranty period, the enterprise will provide free repair or replacement services for users in accordance with relevant regulations. The warranty period varies according to the type of product and the use scenario, generally 1-5 years. Outside the warranty period, the enterprise will also provide repair services, only charging the corresponding material fees and labor fees.
The enterprise will also conduct regular return visits to users to understand the use of products and users' needs, and provide users with necessary maintenance suggestions and technical guidance. Through return visits, enterprises can continuously improve products and services and improve user satisfaction.
In addition, the enterprise has also established a complete after-sales service file, recording user information, product sales, after-sales service processing process, etc., so as to track and manage after-sales service and improve the quality and efficiency of after-sales service.
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