I. From the Perspective of the Product Itself
(1) Specification Parameters
The specification parameters of the 4c 16mm² 0.6/1kV copper
Core XLPE insulated
Underground Power Cable are meticulously designed to fully meet the stringent requirements of the low-voltage distribution system in power stations, with each parameter being adapted to the operating environment and power transmission needs of power stations.
In terms of conductor specifications, the cable adopts a 4-core design, which can effectively realize three-phase four-wire power supply to meet the power demand of auxiliary equipment in power stations. The cross-sectional area of each core conductor is precisely controlled at 16mm², and the purity of the
Copper Conductor is as high as 99.95%. Such high purity ensures that the conductor has excellent conductivity, which can minimize losses during current transmission. The diameter of a
Single Core Conductor is approximately 4.5mm, made by stranding multiple
Copper Wires, with each copper wire having a diameter between 0.2mm and 0.3mm. The stranding pitch is strictly controlled within the range of 18-22 times the diameter. This parameter range is set through a large number of experimental verifications, which not only ensures that the conductor has good
Flexibility, facilitating laying in the complex underground environment of power stations, but also ensures that it has sufficient mechanical strength to resist external forces that may be encountered during laying and use.
The insulation layer is the core guarantee for the electrical performance of the cable, using XLPE (cross-linked polyethylene) material with a thickness of ≥1.0mm. After chemical cross-linking treatment, the molecular structure of XLPE material forms a stable three-dimensional network structure, which significantly improves its electrical and mechanical properties. The temperature resistance level of this insulation layer reaches 90℃, which means that the cable can still maintain stable insulation performance in the high ambient temperature that may occur in power stations. At the rated voltage of 0.6/1kV, the insulation resistance is ≥1000MΩ·km. Such high insulation resistance ensures that there will be no safety hazards such as electric leakage during long-term use of the cable. At the same time, it can withstand a withstand voltage test of 1.8kV/1min, fully verifying the reliability of its insulation layer and being able to cope with transient overvoltage conditions that may occur in the power system of power stations.
The overall outer diameter of the cable is approximately 22-25mm. This size design takes into account both the transmission capacity and laying convenience of the cable. An excessively large outer diameter may increase the difficulty of laying, especially in the limited underground space of power stations; an excessively small outer diameter may not ensure the thickness of the insulation layer and sheath, affecting the cable performance. The sheath is made of weather-resistant PVC material with a thickness of ≥1.2mm, which not only has a good mechanical protection effect, but also has excellent flame retardant performance (complying with IEC 60332-1 standard) and anti-corrosion characteristics. It can effectively resist various corrosive substances in the underground environment of power stations, such as salt in humid air and oil leakage from equipment, and is suitable for various installation methods such as underground direct burial or pipe laying.
In addition, the DC resistance of the cable's conductor at 20℃ is ≤1.15Ω/km. This parameter ensures that the loss of current during transmission is at a low level, improving the efficiency of power transmission. At the same time, the minimum bending radius of the cable is 12 times the outer diameter of the cable, which is convenient for bending and laying in the complex pipeline layout underground in power stations, reducing the risk of cable damage due to excessive bending.
(2) Characteristic Applications
The 4c 16mm² 0.6/1kV copper core XLPE insulated underground power cable has irreplaceable characteristic applications in power station scenarios. Its design and performance perfectly adapt to the various needs of the low-voltage distribution system in power stations, providing a solid power guarantee for the stable operation of power stations.
In connecting generator sets and low-voltage distribution cabinets, this cable plays a key role. During the operation of generator sets, the excitation system and cooling system are important auxiliary systems to ensure their normal operation and require a stable control power supply. This cable can accurately and stably transmit these control power supplies, ensuring that the excitation system can adjust the output voltage of the generator in real time, and the cooling system can timely take away a large amount of heat generated by the operation of the generator set, preventing equipment failure due to overheating. Due to the use of high-purity
Copper Conductors and high-quality XLPE insulation layers, the cable has high transmission efficiency and good stability, and can meet the high-precision requirements of control signals for power transmission.
Another important application of this cable is to provide power distribution support for auxiliary facilities such as on-site lighting, communication equipment, and water pumps. Power stations cover a large area, and the on-site lighting system needs to cover various areas, including workshops, control rooms, and passages, to ensure the normal operation of staff and the safe operation of equipment. Communication equipment is the key to information transmission inside and outside the power station. Once the power is cut off, information transmission will be interrupted, affecting the dispatching and management of the power station. Equipment such as water pumps are responsible for important work such as water circulation and fire water supply in the station, and their stable operation is directly related to the safety of the power station. This cable can provide continuous and stable power for these auxiliary facilities, and its flame retardant and anti-corrosion characteristics also ensure safe power supply in various environments.
As an emergency backup line, this cable can quickly switch when the main system fails to ensure power supply to key equipment. Although the main power system of the power station has high reliability, it may still be interrupted due to unexpected situations such as equipment failure and natural disasters. At this time, the emergency backup line becomes an important guarantee for the operation of key equipment such as emergency lighting, fire protection systems, and important control units. This cable is laid underground, which is not easily affected by the external environment. When the main system fails, it can be quickly put into use to provide power for key equipment, buying valuable time for troubleshooting and system recovery.
Due to the underground laying method, this cable can effectively avoid various risks in the complex environment of the power station. There are a large number of heavy machinery and equipment in the power station, such as cranes and loaders. Cables laid on the ground are easily damaged by mechanical collision; at the same time, oil leakage may occur during the operation of the power station, and
Ground Cables are easily aged by oil erosion; in addition, generator sets, boilers and other equipment will generate high-temperature radiation during operation, which affects the service life of ground cables. The underground laid cable can be away from these risk factors, and is especially suitable for humid and dusty areas of coal-fired and gas-fired power stations. In these environments, its weather-resistant
PVC Sheath and XLPE insulation layer can effectively resist the erosion of moisture, dust and corrosive substances, ensuring the long-term stable operation of the cable.
(3) Material and Style
The 4c 16mm² 0.6/1kV copper core XLPE insulated underground power cable fully considers the special environment and use needs of power stations in material selection and style design, ensuring that the cable has excellent performance and a long service life.
The
Conductor Material is high-purity copper (purity 99.95%). As an excellent conductive material, copper has extremely high conductivity, which can reduce energy loss during current transmission and improve power transmission efficiency, which is crucial for power stations that have high requirements for power transmission efficiency. At the same time, copper has good ductility and mechanical strength. After continuous annealing treatment, its flexibility is further improved, facilitating the processing and laying of the cable and being able to adapt to the complex underground laying path of the power station. In addition, copper has good chemical stability and is not easy to undergo oxidation and corrosion in normal environments, ensuring the long-term conductive performance of the conductor.
The insulation layer material is XLPE (cross-linked polyethylene). After chemical cross-linking treatment, this material forms a three-dimensional network molecular structure, which has significant advantages compared with ordinary polyethylene. Its heat resistance is greatly improved, and it can work stably for a long time in a high-temperature environment of 90℃, meeting the requirements of high-temperature environments that may occur in power stations. The XLPE insulation layer also has excellent electrical insulation performance, which can effectively prevent current leakage and ensure the safety of power transmission. At the same time, in order to adapt to the humid environment of the power station, antioxidants and hydrolysis-resistant agents are added to the XLPE insulation layer, so that it can still maintain stable performance in 95% humidity environment, and the insulation performance will not decrease due to moisture.
The sheath material is weather-resistant PVC (polyvinyl chloride). PVC has good mechanical properties and can provide effective protection for the internal conductors and insulation layers of the cable, resisting external mechanical impact and extrusion. The sheath has excellent flame retardant performance, complying with IEC 60332-1 standard. In case of fire, it can effectively delay the spread of flames and reduce the loss caused by fire, which is particularly important for power stations with high fire safety requirements. In addition, carbon black masterbatch is added to the sheath. Carbon black can absorb ultraviolet rays, improving the ultraviolet aging resistance of the sheath, so that its service life can be extended to more than 30 years in the environment of 50cm underground burial depth, reducing the replacement frequency and maintenance cost of the cable.
In terms of style design, the cable has a 4-core stranded structure, which can make the cable more flexible during laying, facilitating bending and pipe threading. The color of the cable is black. Black can not only absorb heat, reduce the impact of temperature changes on the cable performance, but also form a clear distinction from the surrounding soil and pipelines in the underground environment, facilitating later maintenance and repair.
In response to the special needs of power stations, the cable also provides a variety of customized styles. For areas that need to withstand the rolling of heavy equipment,
Steel Tape armoring (thickness ≥0.5mm) can be added. Steel tape armoring can significantly enhance the impact resistance and pressure resistance of the cable, protecting the cable from external damage. In the enclosed spaces of power stations, such as control rooms and cable trenches, halogen-free low-smoke sheaths (LSZH) can be used. Halogen-free low-smoke sheaths will not release toxic gases and a large amount of smoke when burned, which can ensure the safety of personnel and the normal operation of equipment. In addition, metal marking tapes are set every 100 meters of the cable. The metal marking tapes have good conductivity and magnetism, which are convenient for positioning underground through special equipment, providing convenience for cable fault detection and maintenance.
(4) Production Process
The production process of the 4c 16mm² 0.6/1kV copper core XLPE insulated underground power cable is exquisite and strict, and each link is carefully controlled to ensure that the product quality meets the high standards of power stations.
The production process of the conductor is the basis of cable manufacturing. First, high-purity copper ingots are selected as raw materials, and impurities are removed through smelting to obtain copper water with a purity of 99.95%. The copper water is cast into copper rods through a continuous caster, and the diameter of the copper rods is precisely controlled according to the specifications of the final conductor. Then, the copper rods enter the wire drawing machine for wire drawing treatment. During the wire drawing process, the copper rods pass through a series of dies with different apertures and are drawn into copper wires with a diameter of 0.2mm-0.3mm. During the wire drawing process, it is necessary to strictly control the drawing speed and tension to ensure the dimensional accuracy and surface quality of the copper wires, avoiding defects such as burrs and cracks.
The drawn copper wires need to undergo continuous annealing treatment. Annealing is to heat the copper wires to a certain temperature (usually 300℃-500℃) and then cool them slowly. Through this process, the internal stress generated in the copper wires during the drawing process can be eliminated, and the flexibility and conductivity of the copper wires can be improved. The annealed copper wires are stranded according to a certain stranding process to form a 16mm² single-core conductor. The stranding process adopts the twist-back process, which can make the
Stranded Conductor have better roundness and flexibility, reducing the stress caused by stranding. The stranding pitch is strictly controlled within the range of 18-22 times the diameter to ensure that the mechanical strength and flexibility of the conductor are balanced.
The extrusion process of the insulation layer is the key to ensuring the electrical performance of the cable. First, XLPE particles are mixed evenly with additives such as antioxidants and hydrolysis-resistant agents in a certain proportion. The mixing process is carried out in special mixing equipment to ensure that the additives can be evenly dispersed in the XLPE particles. The mixed materials enter the extruder and are heated to a molten state (temperature about 120℃-150℃) in the extruder. The molten XLPE material is evenly extruded and coated on the surface of the conductor through a die to form an insulation layer. The insulation extrusion accuracy is controlled within ±0.05mm. This high-precision control ensures that the insulation layer has a uniform thickness, avoiding thin spots or thick spots, thus ensuring the stability of the insulation performance.
The extruded insulation layer needs to undergo chemical cross-linking treatment. The cable is placed in a steam vulcanization tank, and under the conditions of high temperature (about 180℃) and high pressure (about 1.8MPa), the XLPE molecules undergo a cross-linking reaction to form a three-dimensional network structure. The time of cross-linking treatment is precisely controlled according to the specifications of the cable and the thickness of the insulation layer to ensure that the cross-linking degree meets the requirements, usually the cross-linking degree needs to be ≥70%. The cross-linked insulation layer has higher heat resistance, aging resistance and mechanical strength.
The extrusion process of the sheath is similar to that of the insulation layer, but the material used is weather-resistant PVC. PVC resin is mixed evenly with additives such as plasticizers, stabilizers, flame retardants, and carbon black masterbatch, and then added to the extruder for heating and melting. The molten PVC material is extruded and coated on the cross-linked insulation layer through a die to form a sheath. The thickness of the sheath is controlled at ≥1.2mm. During the extrusion process, it is necessary to ensure that the sheath is tightly combined with the insulation layer, avoiding bubbles or gaps. A semi-conductive water-blocking layer is also set between the sheath and the insulation layer. The semi-conductive water-blocking layer is made of semi-conductive materials and has good conductivity and water absorption. When water tries to penetrate into the cable, the semi-conductive water-blocking layer can quickly absorb water and expand, preventing further diffusion of water and protecting the insulation layer and conductor.
During the entire production process, multiple quality inspection procedures are required. After the production of the conductor, parameters such as its diameter and DC resistance are tested; after the extrusion of the insulation layer, parameters such as its thickness, insulation resistance, and voltage resistance performance are tested; after the extrusion of the sheath, parameters such as its thickness, flame retardant performance, and impact resistance performance are tested. The finished cable also needs to undergo partial discharge testing to ensure that the partial discharge capacity is ≤10pC, so as to meet the high requirements of power stations for cable operation stability. In addition, each batch of cables needs to be sampled and sent for inspection, and long-term thermal aging tests, environmental stress cracking resistance tests, etc., are carried out to verify the long-term performance of the cables.
II. From the Perspective of General Product Information
(1) Packaging
The packaging design of the 4c 16mm² 0.6/1kV copper core XLPE insulated underground power cable fully considers the characteristics of the product and the needs of transportation and storage, aiming to protect the cable from damage during transportation, storage and handling, and at the same time facilitate customers to receive and use it.
The cable is packaged in 500-meter wooden reels. The wooden reels are made of high-quality hardwood, which has high strength and toughness and can withstand the weight of the cable and the impact force during transportation. The diameter of the reel is precisely designed according to the outer diameter and length of the cable to ensure that the cable can be tightly and neatly wound on the reel, avoiding looseness or mutual friction during transportation. Both sides of the reel are equipped with baffles with a thickness of ≥20mm, which can effectively prevent the cable from sliding off from both sides of the reel. Clear marks are printed on the baffles, including product name, model specification (4c 16mm² 0.6/1kV), length, weight, manufacturer, production date, implementation standard, etc., which is convenient for customers to check and identify when receiving goods.
Before the cable is wound on the reel, its surface will be wrapped with a layer of plastic film. The plastic film has good moisture-proof and dust-proof performance and can protect the sheath of the cable from pollution and damage. After winding, the cable is fixed on the reel with high-strength packing belts, and the tension of the packing belts is uniform to ensure that the cable will not loosen during transportation. For cables that need long-distance transportation or export, the reels will also be fumigated to meet international quarantine standards and prevent the spread of diseases and pests in the wood.
Each packaging unit is also accompanied by a complete set of technical documents, including product certificates, test reports, user manuals, etc. The product certificate details the various parameters and quality test results of the product, proving that the product meets relevant standards and requirements; the test report contains various test data of the cable during production, such as conductor resistance, insulation resistance, withstand voltage test results, etc.; the user manual details the laying method, precautions, maintenance and other contents of the cable, providing guidance for customers' use.
In terms of storage, packaged cables should be stored in a dry, ventilated and cool warehouse, avoiding direct sunlight, rain and moisture. The temperature of the warehouse should be controlled between -15℃ and 40℃, and the relative humidity should not exceed 85%. Cable reels should be placed horizontally or vertically. When placed vertically, fixing measures should be taken to prevent tipping. A certain distance should be maintained between reels to avoid mutual extrusion, with a distance of ≥30cm. At the same time, cables should be kept away from fire sources, heat sources and corrosive substances such as acids, alkalis and oils to prevent damage to the cables. During storage, cables should be inspected regularly to check whether the packaging is intact and whether the cables are damp or damaged, ensuring that the cables are in good condition before use.
(2) Transportation
The transportation of 4c 16mm² 0.6/1kV copper core XLPE insulated underground
Power Cables requires strict compliance with relevant regulations and operating procedures to ensure that the cables are delivered to the destination safely and timely, which is particularly important for power stations that have high requirements for the timeliness of equipment supply.
In terms of transportation methods, road transportation, railway transportation or water transportation can be adopted according to the different transportation distances and quantities. For short-distance transportation or small batches of goods, road transportation is an ideal choice, usually using trucks with rainproof and sunproof facilities. The truck compartment should be flat and clean, without sharp objects to prevent damage to the cable packaging. During transportation, the cable reels should be firmly fixed in the compartment, which can be fixed with steel wire ropes or chains. The fixing points should be selected on the baffles of the reels to avoid fixing on the cables. Buffer materials such as wooden boards and rubber pads should be placed between the reels to prevent mutual collision.
For long-distance transportation or large quantities of goods, railway transportation or water transportation is more economical and efficient. Railway transportation usually uses boxcars, which can provide good rainproof, sunproof and anti-theft protection. The placement of cable reels in boxcars is similar to that in road transportation, requiring firm fixation to avoid movement during transportation. Water transportation is suitable for cross-regional or export transportation, using containers for transportation. The container should be kept dry, and desiccants can be placed to absorb moisture in the air. The cable reels in the container should be arranged neatly to make full use of space, and at the same time, they should be fixed firmly to prevent the reels from shifting or colliding due to ship.
During transportation, the following points should be noted: First, avoid severe vibration and impact on the cable reels. The transport vehicles should drive steadily during driving, avoiding sudden braking, sharp turns and other operations; Second, prevent the cables from getting damp. When transporting in rainy or humid environments, ensure that the rainproof facilities of the transport tools are intact to avoid rainwater wetting the cables; Third, prevent the cables from being affected by high temperatures. When transporting in high-temperature weather in summer, try to avoid the cables being exposed to the sun for a long time, and can use sunshades to cover them; Fourth, it is forbidden to stack other heavy objects on the cable reels to avoid crushing the cables.
During transportation, there should be special personnel responsible for escorting. The escorts should be familiar with the characteristics and transportation requirements of the cables, and regularly check the fixing of the cables and the integrity of the packaging. If any abnormal situation is found, measures should be taken to deal with it in a timely manner. At the same time, transportation records should be made, recording the transportation time, route, weather conditions, and the status of the cables, so that if problems occur, they can be traced and handled in a timely manner.
(3) Shipping
The shipping process of 4c 16mm² 0.6/1kV copper core XLPE insulated
Underground Power Cables is a key link to ensure that the products are delivered to power station customers on time and in good condition, involving multiple links such as order processing, goods preparation, document preparation and customs declaration.
After receiving the customer's order, the sales department will first confirm the product specifications, quantity, delivery time and destination with the customer, and then issue a production plan or inventory allocation notice to the production department or warehouse department. If the product is in stock, the warehouse department will arrange for picking according to the order requirements. The picking staff will carefully check the product model, specification, length and other information to ensure that it is consistent with the order. If there is no stock, the production department will arrange production according to the production plan, strictly controlling the production progress to ensure that the product is completed before the agreed delivery time.
Before shipping, the quality inspection department will conduct a comprehensive inspection of the cables to be shipped, including appearance inspection, electrical performance testing and mechanical performance testing. Only the products that pass the inspection can be shipped. At the same time, the warehouse department will pack the cables according to the specified packaging standards, ensuring that the packaging is firm and intact, and affix the necessary marks and labels.
The preparation of shipping documents is an important part of the shipping process. The required documents usually include commercial invoices, packing lists, bills of lading, product quality certificates, test reports and relevant certification documents (such as IEC certification, UL certification, etc.). These documents must be true, accurate and complete to meet the requirements of customs clearance and customer acceptance. The commercial invoice should clearly indicate the product name, specification, quantity, unit price, total price and other information; the packing list should detail the packaging form, quantity, weight and volume of each package; the bill of lading is a key document for the customer to take delivery of the goods, and its content must be consistent with the actual goods.
For export shipments, customs declaration procedures must be completed in accordance with the relevant regulations of the exporting country and the importing country (the Philippines). The customs declaration enterprise will fill in the customs declaration form truthfully, and submit relevant documents to the customs for inspection. After the customs passes the inspection and releases the goods, the shipment can be arranged. During the customs declaration process, if there are any problems or doubts, the sales staff and the customs declaration enterprise will communicate and coordinate in a timely manner to ensure the smooth progress of customs declaration.
After the goods are shipped, the sales staff will promptly inform the customer of the shipping information, including the name of the shipping company, the bill of lading number, the estimated arrival time, etc., so that the customer can make preparations for receiving the goods. At the same time, the sales staff will track the logistics information of the goods, and feedback the transportation status to the customer regularly. If there is a delay or other abnormal situations, they will actively coordinate with the logistics company to deal with it and minimize the impact on the customer.
(4) Samples
Providing samples of 4c 16mm² 0.6/1kV copper core XLPE insulated underground power cables is an important way for power station customers to understand the product quality and performance, which helps to enhance customer confidence and promote the conclusion of transactions.
Customers can apply for samples through various channels such as telephone, email, and online platforms. When applying, customers need to provide basic information such as company name, contact person, contact information, and the purpose of the sample. The sales staff will confirm the customer's needs and relevant information, and then submit a sample application to the company's relevant department.
The company will usually provide samples free of charge, but the customer may need to bear the freight. The length of the sample is generally 1-5 meters, which can be adjusted according to the customer's test needs. For example, if the customer needs to test the electrical performance of the cable, a 1-meter sample may be sufficient; if the customer needs to test the bending performance or installation performance, a longer sample may be required.
The production of samples is carried out in accordance with the same standards and processes as mass-produced products to ensure that the quality and performance of the samples are consistent with the mass-produced products. After the sample is produced, it will undergo the same quality inspection as the formal product to ensure that it meets the relevant standards and requirements.
The sample packaging is usually simple and practical, using cartons or wooden boxes for packaging to prevent damage during transportation. The sample package will be attached with a sample label, indicating the product model, specification, production date, and other information, as well as the company's contact information for the customer to consult.
The samples are usually transported by express. The company will choose a reliable express company with international transportation experience to ensure that the samples can be delivered to the customer in the Philippines in a timely manner. After the sample is sent, the sales staff will inform the customer of the express tracking number, so that the customer can track the logistics status of the sample.
After the customer receives the sample, if they have any questions about the sample's performance or use, the company's technical staff will provide professional answers and guidance. If the customer needs to conduct further tests or inspections on the sample, the company can also provide relevant technical support and cooperation.
(5) After-sales Service
The after-sales service of 4c 16mm² 0.6/1kV copper core XLPE insulated underground power cables is an important guarantee for the normal use of the product in power stations, including technical support, maintenance, replacement and other services.
The company provides a product warranty period, usually 24 months from the date of delivery. During the warranty period, if the product has quality problems due to manufacturing defects or material problems, the company will provide free repair or replacement services. The customer needs to provide a purchase certificate and a description of the problem, and the company's after-sales staff will confirm the problem and deal with it in a timely manner.
Technical support is an important part of after-sales service. The company has a professional technical team that can provide customers with technical consultation and guidance on cable installation, laying, use and maintenance. Customers can consult through telephone, email, video conference and other ways. For complex technical problems, the company can also send technical personnel to the site for guidance.
If the cable is damaged during use and needs to be repaired or replaced, the company can provide corresponding services. For non-warranty products, the company will charge a certain cost according to the actual situation, but will ensure that the price is reasonable and transparent. At the same time, the company maintains a certain inventory of spare parts to ensure that the required spare parts can be provided in a timely manner when repairing the cable.
The company will also conduct regular return visits to customers to understand the use of the product and collect customer feedback and suggestions. Based on customer feedback, the company will continuously improve product quality and service level. For important customers or large projects, the company will send special personnel to conduct on-site return visits, understand the product operation status, and provide preventive maintenance suggestions.
In addition, the company has established a sound after-sales service complaint handling mechanism. If the customer has any dissatisfaction with the after-sales service, they can make a complaint through the specified channel. The company will handle the complaint in a timely manner, investigate the cause of the problem, and take corrective measures to ensure that the customer's legitimate rights and interests are protected.
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