Details of 15kv 25kv 35kv Covered Protected Aluminum Single Cores XLPE Insulation PVC High Voltage Power Cable
I. Product - Related Information
(I) Specifications and Parameters
This product is a 15kV, 25kV, 35kV covered protected
Aluminum Core high - voltage power cable with a single - core design, which can meet the needs of high - voltage single - phase transmission. Cables of different voltage levels differ in structural dimensions to meet their respective high - voltage transmission requirements.
The cross - sectional area of the
Aluminum Core Conductor of 15kV cables has a variety of choices according to the transmission power requirements, with common ones being 25mm² and 35mm², and the thickness of its insulation layer is usually 5 - 8mm; the cross - sectional area of the aluminum core conductor of 25kV cables is generally not less than 50mm², and the thickness of the insulation layer is about 8 - 10mm; the cross - sectional area of the aluminum core conductor of
35kv Cables is larger, with common ones being 70mm² and 95mm², and the thickness of the insulation layer reaches 10 - 12mm.
These three voltage - level cables all use XLPE insulation and
PVC Sheaths, and perform well in temperature resistance, being able to work stably in an environment of - 40℃ to 90℃. Their current - carrying capacities also vary due to different voltage levels and conductor cross - sectional areas. The current - carrying capacity of 15kV cables is about 80 - 150A, that of 25kV cables is about 120 - 200A, and that of 35kV cables is about 150 - 250A, which can meet the power requirements of different high - voltage power transmission scenarios.
(II) Characteristic Uses
15kV cables are suitable for urban distribution network branches. The urban distribution network needs to distribute high - voltage power from substations to various areas, and the branch transmission distance is relatively short. The 15kV voltage level can meet this demand. Its covered protection structure and good insulation performance can ensure stable power transmission in complex underground or overhead environments in cities, providing power for residents' lives and urban public facilities.
25kV cables can be used for high - voltage incoming lines in industrial parks. There are a large number of production equipment in industrial parks, with large power demand, and the incoming lines need to withstand higher voltages to reduce transmission losses. 25kV cables can safely and stably introduce external high - voltage power into the power distribution system of industrial parks to meet the power demand of various production equipment in the parks.
35kV cables are suitable for outgoing lines of small and medium - sized substations. Small and medium - sized substations are responsible for power distribution in a certain area, and the outgoing lines need to have a high voltage level and reliable transmission performance. 35kV cables can transmit high - voltage power from substations to the next - level power distribution network. Their excellent high - voltage resistance and anti - interference ability can ensure the stability and safety of power transmission.
In addition, these three voltage - level cables can also play a role according to actual needs in high - voltage power output lines of some large mining areas and new energy power plants (such as wind power and photovoltaic
Power Stations).
(III) Material and Style
Conductor Material
The conductor is made of aluminum, which has good electrical conductivity and can meet the conductivity requirements of high - voltage power transmission. Compared with copper, aluminum has a low density, which makes the overall weight of the cable lighter. During the erection process, it can reduce the load - bearing requirements of erection facilities such as brackets, reducing the erection cost; at the same time, the lightweight also reduces the difficulty of transportation and saves transportation costs.
The
Aluminum Conductor has undergone special surface treatment, with certain oxidation resistance and corrosion resistance, and can maintain good electrical conductivity during long - term use. Moreover, aluminum resources are relatively abundant and the price is relatively low, which can reduce the overall production cost of the cable.
Insulation Layer Material
The insulation layer is made of XLPE (cross - linked polyethylene). This material has excellent high - voltage resistance, can stably withstand the electric field effect corresponding to 15kV, 25kV and 35kV, and effectively avoid high - voltage breakdown. It has low dielectric loss, resulting in little energy loss during high - voltage transmission, which improves the efficiency of power transmission.
The XLPE insulation layer has a wide temperature resistance range and can work stably in the environment of - 40℃ to 90℃, and the insulation effect will not be significantly affected by temperature changes. At the same time, it also has good mechanical strength and aging resistance, can maintain insulation performance for a long time, and extend the service life of the cable.
Sheath Layer Material
The outer sheath is made of PVC (polyvinyl chloride) material. PVC has good weather resistance and can resist the erosion of natural factors such as outdoor wind and rain and ultraviolet radiation, protecting the internal insulation layer and conductor. It also has excellent wear resistance, which can reduce damage caused by friction during cable laying and use.
In addition, the PVC sheath also has a certain flame retardancy. When encountering an accidental fire, it can delay the spread of the fire and provide additional protection for the safety of the power system. Moreover, PVC material has good processing performance and can be tightly wrapped around the outer layer of the insulation layer to form a good protection.
Style Design
The cable adopts a single - core design, which is suitable for high - voltage single - phase transmission and reduces mutual interference between multiple cores. The single - core structure also makes the cable more flexible in laying, especially in overhead and pipe - laying scenarios, and the operation is relatively simple.
The covered protection structure makes the materials of each layer of the cable closely combined, enhancing the overall structural stability and anti - interference ability. The cable has a cylindrical appearance and a smooth surface. Cables of different voltage levels can be distinguished by marks or colors on the sheath, which is convenient for identification and selection.
(IV) Production Process
Aluminum Core Conductor Manufacturing
First, the aluminum raw materials are strictly screened to remove impurities to ensure that the purity meets the requirements. Then, the aluminum material is made into aluminum rods through smelting, billet casting and other processes. The aluminum rods are drawn into
Aluminum Wires of the required diameter through wire drawing equipment.
According to the requirements of the conductor cross - sectional area, multiple
Aluminum Wires are stranded to form an aluminum core conductor according to a specific stranding method. During the stranding process, it is necessary to ensure that the aluminum wires are arranged closely and with uniform tension to improve the electrical conductivity and mechanical strength of the conductor. After stranding, the aluminum core conductor is annealed to eliminate internal stress and enhance its
Flexibility.
XLPE Insulation Layer Extrusion
The XLPE material is pretreated to remove moisture and impurities. The treated material is sent to the extruder and melted and plasticized under high temperature and pressure. The molten XLPE material is evenly coated on the surface of the aluminum core conductor through a special mold to form an insulation layer.
During the extrusion process, it is necessary to accurately control the temperature, pressure and extrusion speed to ensure that the insulation layer has a uniform thickness, a smooth surface, and is closely combined with the aluminum core conductor without defects such as bubbles and pinholes. After that, the insulation layer is cross - linked. The XLPE molecules are formed into a three - dimensional network structure by heating and other methods to enhance its high - voltage resistance and temperature resistance.
Covered Protection and PVC Sheath Extrusion
Covered protection treatment is carried out on the outer layer of the XLPE insulation layer. Usually, a layer of buffer material is wrapped to reduce the impact of external mechanical force on the insulation layer. Then, PVC sheath extrusion is carried out. The PVC material is added to the extruder, melted and evenly coated on the outer layer of the covered protection layer through a mold.
It is necessary to control the thickness and uniformity of the PVC sheath to enable it to effectively protect the internal structure. After extrusion, the sheath is cooled and shaped to ensure that its shape is stable and the surface is smooth.
Finished Product Inspection
The finished product inspection requires a number of tests on the cable, including appearance inspection, size measurement, electrical performance test, etc. The appearance inspection checks whether the sheath is smooth and free of damage, and whether the insulation layer is intact; the size measurement checks whether the conductor cross - sectional area, insulation layer and sheath layer thickness meet the specifications; the electrical performance test checks the insulation performance and breakdown resistance of the cable at the corresponding voltage level through voltage withstand test and other methods. Only cables that meet all indicators can leave the factory.
II. General Product Information
(I) Packaging
Packaging Materials
The cable is packaged with cable reels, which are divided into wooden and steel types. Wooden cable reels have low cost and are suitable for short - distance transportation and general storage; steel cable reels have high strength and strong bearing capacity and are suitable for long - distance transportation and multiple turnovers.
After the cable is wound on the cable reel, it will be wrapped with a plastic film, which can play a role in moisture - proof and dust - proof and protect the cable surface from pollution. For cables transported over long distances, a layer of woven bag is also put over the plastic film to enhance the protection of the cable and prevent collision and wear during transportation.
Packaging Methods
When packaging, the cable is neatly wound on the cable reel. During the winding process, appropriate tension is maintained to avoid loose or excessive stretching of the cable. After winding, the entire cable is tightly wrapped with a plastic film to ensure that every part is covered.
If a woven bag is used, put the woven bag over the plastic film and fix the woven bag on the cable reel with a rope to prevent it from falling off. A label is pasted on the obvious position of the cable reel, indicating the product name, voltage level, specification, length, production date, manufacturer and other information, which is convenient for identification and traceability.
(II) Transportation
Transportation Methods
Choose the appropriate transportation method according to the transportation distance and quantity. For short - distance transportation (such as within tens of kilometers), small trucks are generally used. This transportation method is flexible and convenient, can quickly deliver the cable to the destination, and is suitable for small - batch transportation.
For medium - and long - distance transportation with a large quantity, large freight trucks are usually used, which have a large loading capacity and relatively low transportation costs. For urgent needs, logistics 专线 transportation can be chosen, which is faster and can shorten the transportation time.
Transportation Precautions
During transportation, the cable reel must be fixed firmly. Ropes, brackets, etc. can be used to fix it in the carriage of the transport vehicle to prevent rolling and collision during driving. During transportation, the cable should be prevented from being exposed to direct sunlight and rain. If it is transported in the open air, a tarpaulin must be covered for protection.
At the same time, it is necessary to prevent the cable from being mixed with corrosive substances and sharp objects to avoid corrosion or scratch of the cable. The transport vehicle should drive smoothly, and try to avoid sudden braking and sharp turns to reduce the shaking of the cable reel. When loading and unloading cables, professional loading and unloading equipment must be used. Rough loading and unloading is strictly prohibited to prevent damage to the cable reel and cables.
(III) Shipment
Shipment Process
After the customer places an order, the customer service personnel will check the order information in a timely manner, including the product voltage level, specification, quantity, receiving address, contact information, etc., to ensure that the information is accurate and correct. After checking, the order information is transmitted to the warehouse.
After receiving the order, the warehouse retrieves the corresponding cable products from the inventory according to the order information, counts the quantity and inspects the appearance to confirm that the products are in good condition and the packaging is complete. After the inspection, the cables are transported to the shipping area for shipment.
The warehouse contacts the transport company, informs the goods information and shipping requirements, and arranges transport vehicles. When the transport vehicle arrives, the warehouse staff and the driver go through the goods handover procedures together, load the cables onto the vehicle, and fill in the waybill and other relevant documents. After shipment, the customer service personnel promptly inform the customer of the waybill number, the name of the transport company, the estimated arrival time and other information to facilitate the customer to track the logistics.
Shipment Time
When the inventory is sufficient, regular orders (such as less than 5 reels) can generally be shipped within 1 - 2 working days after the customer places the order. If the order quantity is large (such as more than 10 reels), it is necessary to prepare, sort and package the goods, and the shipment time will be extended to 2 - 3 working days.
If the customer has special requirements, such as customizing cables of a specific length, the production cycle will increase accordingly, and it usually takes 5 - 7 working days to complete the production and shipment. In case of special circumstances such as holidays and bad weather, the shipment time may be delayed, and the customer service personnel will communicate with the customer in advance to explain the situation and negotiate a new shipment time.
(IV) Samples
Sample Provision
To help customers understand product quality and performance, the company provides sample services. Customers can put forward sample requirements to sales personnel and specify the voltage level and specification of the required samples. The length of the sample is generally 1 - 2 meters, which can meet the customer's needs for checking the appearance, material and structure of the cable.
The material and process of the samples are exactly the same as those of mass - produced products, which can truly reflect the actual performance of the products. The transportation cost of the samples is borne by the customer, and the customer can choose to pay the freight by themselves or be collected by the company.
Sample Delivery
After the samples are prepared, the staff will package the samples, usually in a hard paper tube or a sealed bag, to prevent the samples from being damaged during transportation. The voltage level, specification, company name and contact information of the sample are marked on the package.
Samples are sent by express, and express companies with good service and fast speed are selected. After the samples are sent, the sales personnel promptly inform the customer of the express waybill number, and the customer can query the logistics status of the samples through the express waybill number. Samples in domestic areas can generally be delivered within 1 - 3 days, and it may take 4 - 5 days in remote areas.
(V) After - sales Service
Quality Assurance
The company provides quality assurance for this high - voltage power cable product, with a warranty period of 24 months from the date when the customer receives the product and accepts it. During the warranty period, if the cable fails due to its own quality problems (such as insulation layer aging and damage, conductor breakage and other non - human factors), the company is responsible for providing customers with free replacement of new products or maintenance.
If the product failure is caused by improper use by the customer (such as use beyond the rated voltage, wrong laying method, external impact, etc.) or natural loss, the company does not assume the responsibility of free warranty, but can provide paid maintenance services.
After - sales Service Process
If a customer finds a problem with the cable during use, they can feedback through the company's customer service phone, email, online customer service and other channels. After receiving the feedback, the customer service personnel will record the customer information, product model, purchase time, problem description and other contents in detail, and arrange professional technical personnel to connect with the customer within 24 hours.
Technical personnel communicate with customers to further understand the problem, and if necessary, ask customers to provide photos or videos of the problem site. Technical personnel analyze and judge according to the known situation to determine the cause and responsibility of the problem.
If it is a product quality problem, the technical personnel will negotiate a solution (repair or replacement) with the customer and complete the relevant work within the agreed time. If the problem is caused by improper use by the customer, the technical personnel will inform the customer of the maintenance plan and cost, and carry out the maintenance after the customer agrees.
Technical Support
The company has a professional technical team to provide customers with all - round technical support. When customers purchase cables, technical personnel will recommend suitable cable products for customers according to their use scenarios, voltage levels, transmission power, etc., and provide relevant technical parameters and use suggestions.
During cable laying and installation, if customers encounter technical problems, they can consult technical personnel at any time. Technical personnel will provide detailed guidance, such as bending radius requirements during laying, insulation testing methods, joint processing skills, etc.
In addition, the company will also conduct regular return visits to customers to understand the use of cables, collect customer opinions and suggestions, and continuously improve products and services. At the same time, it provides customers with product - related technical materials, such as product manuals and installation guides, to help customers use the products better.
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