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    3X25+1X10 3X50+25 3X95+50 3X120+70 3X150+70 3X185+95 3X240+120 mm Power Cable

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    2025-08-04 03:52:22
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Detailed Introduction to Power Cables of Various Specifications

I. From the Perspective of the Product Itself

(1) Specification Parameters

The involved Power Cables have a variety of specifications, including 3×25+1×10, 3×50+25, 3×95+50, 3×120+70, 3×150+70, 3×185+95, 3×240+120mm, etc. These specifications all reflect the characteristics of Multi-Core collaborative design. "3×" clearly represents 3 main cores responsible for the main power transmission task, the number followed indicates the cross-sectional area of the core (unit: mm²), and the specification after "+" corresponds to the neutral wire or Ground Wire, together forming a complete power supply circuit.
There are obvious differences in the current-carrying capacity of cables with different specifications, which is also a key parameter for them to adapt to different scenarios. The 3×25+1×10mm cable has a current-carrying capacity of about 80-100A, which can meet the power demand of scenarios with concentrated small equipment; the 3×50+25mm cable has a current-carrying capacity of 120-150A, which can support the operation of medium-sized electrical equipment; the current-carrying capacity of the 3×95+50mm cable is further improved, suitable for larger power transmission; the current-carrying capacity of specifications such as 3×120+70mm, 3×150+70mm, and 3×185+95mm gradually increases, while the 3×240+120mm cable has a current-carrying capacity of up to 400-500A, which is sufficient to stably support the operation of large high-power equipment.
The conductive performance parameters of the core are also very important. High-purity Copper Conductors (purity over 99.9%) have a conductivity of 58MS/m, and Aluminum Conductors have a conductivity of about 37MS/m. Such conductive performance can greatly reduce losses during power transmission and ensure the efficiency of power transmission. In terms of the insulation layer, after warm water cross-linking treatment, XLPE (cross-linked polyethylene) has a temperature resistance range extended to -40℃ to 90℃, with an insulation resistance of ≥1000MΩ·km and a breakdown field strength of ≥20kV/mm. These parameters ensure that the insulation layer can maintain stable insulation performance in various environments.
The parameters of the sheath layer vary depending on the material. The acid and alkali resistance of the PVC Sheath meets the GB/T 2951.5 standard, enabling it to work stably in corrosive environments such as chemical industry; the polyethylene sheath has better Flexibility, with a minimum bending radius of only 6 times the outer diameter of the cable, facilitating laying in narrow spaces. Some models with added flame retardants have passed the GB/T 18380.3 bundle combustion test, which can improve safety in fire environments.

(2) Characteristic Uses

Power cables of different specifications have characteristic uses in their respective fields due to their performance characteristics.
The 3×25+1×10mm cable has a moderate current-carrying capacity and is suitable for scenarios with concentrated equipment such as small air compressors and workshop lighting. In the workshop of a small processing plant, various small machine tools, tools, and lighting equipment are concentrated, and the demand for electricity is relatively small. This specification of cable can stably provide electricity for these equipment, ensuring the normal progress of production.
The 3×50+25mm cable has a current-carrying capacity of 120-150A, which can meet the power supply requirements of central air-conditioning and elevator group control systems in medium-sized shopping malls. In medium-sized shopping malls, the power consumption is large when the central air-conditioning system and multiple elevators are running at the same time. This specification of cable can bear such a load, ensuring the stable operation of these key equipment and the normal operation of the shopping mall.
Cables with specifications of 3×95+50mm and above, with the gradual increase of current-carrying capacity, their applicable scenarios also expand to larger power equipment and more complex power systems. The 3×95+50mm cable can be used for some larger production equipment in factories, such as medium-sized injection molding machines; 3×120+70mm and 3×150+70mm cables are suitable for the main power transmission of factory production lines, connecting equipment in multiple production links; the 3×185+95mm cable can be used for some transmission lines in industrial parks to provide power for multiple factories; the 3×240+120mm cable has an extremely high current-carrying capacity, which can stably support the operation of high-power equipment such as steel mill rolling mills and large substation outgoing lines, and is the Core Cable for large-scale industrial production and power transmission and distribution.
In the construction field, small-specification cables are used for wiring from distribution boxes to terminal equipment in shops and office buildings, such as connecting office equipment such as computers, printers, and air conditioners, as well as lighting and cash register equipment in shops; medium-specification cables are suitable for the main lines of commercial complexes, providing support for the power distribution of the entire shopping mall; large-specification cables have become core components of the power supply main lines of high-rise buildings, ensuring the power supply of the entire building.
In municipal engineering, these cables are also widely used. In the road lighting system, cables of appropriate specifications can be selected according to the power and quantity of street lamps; in municipal sewage treatment plants, the power connection of various sewage treatment equipment also requires cables of different specifications.

(3) Material and Style

  1. Material

The core materials are mainly high-purity copper and aluminum. High-purity copper (purity over 99.9%) has excellent conductivity, with a conductivity of 58MS/m, and also has good ductility and toughness, which is convenient for processing into cores of various specifications, not easy to break during laying, and can adapt to different installation environments. The conductivity of Aluminum Conductors is about 37MS/m, which is slightly inferior to copper, but it is lighter in weight and relatively low in cost, so it is widely used in scenarios where weight and cost are required.
The insulation layer generally uses XLPE (cross-linked polyethylene). After warm water cross-linking treatment, its molecular structure forms a three-dimensional network structure, which greatly improves heat resistance, insulation, and mechanical strength. This material can maintain stable performance in the temperature range of -40℃ to 90℃, and the insulation resistance and breakdown field strength are also excellent, effectively preventing current leakage and ensuring the safety of power transmission.
The material of the sheath layer is selected according to the scene requirements. The PVC (polyvinyl chloride) sheath has good corrosion resistance, wear resistance, and certain flame retardancy, meets the acid and alkali resistance requirements of GB/T 2951.5 standard, and is suitable for use in corrosive environments such as chemical industry areas. The polyethylene sheath has better flexibility, with a minimum bending radius of only 6 times the outer diameter of the cable, facilitating laying in narrow spaces and scenarios requiring frequent bending, and also has good low-temperature resistance and chemical stability. The sheath of some models is added with flame retardants, making it have good flame retardant performance, passing the GB/T 18380.3 bundle combustion test, and improving safety in fire environments.
  1. Style

In terms of appearance, these power cables are all cylindrical long strips with a compact overall structure. The cores are twisted together, and the outer layer is wrapped with an insulation layer and a sheath layer in sequence. This structure makes the cable have good flexibility and mechanical strength, facilitating laying and use.
The color of the cable is usually determined according to its purpose and industry standards. Generally speaking, the sheath color is mostly black, which has good weather resistance and can reduce the aging effect of direct sunlight on the sheath, suitable for outdoor laying. In some special scenarios, there will also be sheaths of different colors to distinguish cables of different phases or functions, facilitating identification by installation and maintenance personnel.
Cables of different specifications have differences in diameter. As the cross-sectional area of the core increases, the diameter of the cable also increases accordingly. Large-specification cables have a larger diameter, which can accommodate thicker cores and thicker insulation layers and sheath layers to meet their needs in high-power transmission and harsh environments.

(4) Production Process

The production process of various specifications of power cables is rigorous and complex, ensuring the quality and performance of the products.
  1. Core Production: For Copper Conductors, first, high-purity copper raw materials are smelted to remove impurities and improve the purity of copper. Then, the copper liquid is cast into copper rods through a continuous casting process, and then the copper rods are drawn into Copper Wires of the required diameter through wire drawing equipment. Finally, multiple copper wires are twisted together to form a core with a certain cross-sectional area. The twisting process can improve the flexibility and filling coefficient of the core. The production process of aluminum conductors is similar to that of copper conductors. First, aluminum raw materials are smelted and cast into aluminum rods, then drawn and twisted to form cores.

  1. Insulation Layer Extrusion and Cross-linking: The produced core is cleaned and dried to remove oil and impurities on the surface. Subsequently, the XLPE Insulation Material is wrapped around the core by extrusion process. During the extrusion process, it is necessary to accurately control the temperature, pressure, and speed of the extruder to ensure that the insulation layer has uniform thickness, smooth surface, and is closely combined with the core. After extrusion, the insulation layer is subjected to warm water cross-linking treatment. The cable is put into warm water, and under specific temperature and pressure conditions, the XLPE molecules undergo a cross-linking reaction to form a three-dimensional network structure, thereby improving the heat resistance, insulation, and mechanical strength of the insulation layer.

  1. Cabling: Multiple cores wrapped with insulation layers (including main cores and auxiliary cores) are cabled according to a certain twisting method. During twisting, it is necessary to ensure that the positions of each core are uniform and the tension is consistent to ensure the structural stability of the cable. During the cabling process, filling materials are also added in the middle of the cable core to improve the roundness and stability of the cable.

  1. Sheath Extrusion: According to the use scenario and requirements of the cable, a suitable sheath material (PVC or polyethylene, some models add flame retardants) is selected, and the sheath is extruded on the outer layer of the cabled core through an extrusion process. During the extrusion process, it is necessary to control the parameters of the extruder to ensure that the sheath has uniform thickness, flat surface, and is closely combined with the internal structure, playing a good protective role. For sheaths with added flame retardants, it is necessary to fully mix the flame retardants with the base material before extrusion to ensure the flame retardant performance of the sheath.

  1. Finished Product Inspection: The produced cables need to undergo strict inspection. The inspection items include the conductivity of the core, the insulation resistance and breakdown field strength of the insulation layer, the thickness and mechanical properties of the sheath, and the overall appearance of the cable. For models with flame retardant requirements, flame retardant performance tests are also required. Only cables that pass all inspection items can leave the factory.

II. From the Perspective of General Product Information

(1) Packaging

In order to ensure that power cables are not damaged during transportation and storage, their packaging methods are carefully designed.
For coiled cables, cable reels are usually used for packaging. There are two types of cable reels: wooden and iron. Wooden cable reels have low cost and light weight, suitable for short-distance transportation and packaging of small batches of cables; iron cable reels have high strength and large load-bearing capacity, suitable for long-distance transportation and packaging of large batches of cables, which can better protect cables from extrusion and collision.
When the cable is wound on the cable reel, it needs to be arranged neatly to avoid twisting and knotting, so as to prevent damage to the insulation layer and sheath layer of the cable. After winding, a layer of plastic film is wrapped around the outer layer of the cable. The plastic film has good moisture-proof and dust-proof performance, which can protect the cable from moisture and dust erosion. For cables that need to be stored for a long time, a layer of linen or canvas is wrapped around the outer layer of the plastic film to further enhance the protective effect and prevent the cable from direct sunlight and mechanical damage.
A label is fixed on the side of the cable reel, which details the cable's model, specification, length, core material, insulation material, production date, manufacturer, and other information, facilitating customers' identification and verification during receipt and storage. At the same time, the label also indicates some precautions, such as "Do not press heavily" and "Moisture-proof and sun-proof".
For small-length cables, reel or bundle packaging may be used. Reel packaging is similar to cable reels but smaller in size, easy to carry and transport; bundle packaging is to neatly bundle the cables into bundles and wrap them with plastic film, suitable for temporary use or small batch procurement.

(2) Transportation

The transportation of power cables needs to strictly follow relevant regulations to ensure that the cables arrive at the destination safely.
  1. Transportation Methods: According to the transportation distance and quantity, different transportation methods can be selected. Short-distance transportation generally adopts road transportation, using trucks for loading. Road transportation has high flexibility and can directly deliver the cables to the customer's designated location, suitable for small batch and urgent transportation needs. For long-distance transportation, railway transportation or waterway transportation can be chosen. Railway transportation has large capacity, fast speed, and good stability, suitable for long-distance transportation of large quantities of cables; waterway transportation has low cost, suitable for transporting large and heavy cables, but the transportation time is relatively long.

  1. Transportation Precautions: When loading cables, it is necessary to ensure that the cable reels are placed stably and fixed firmly to avoid tilting, rolling, or collision during transportation. For wooden cable reels, attention should be paid to avoiding damage caused by excessive extrusion; for iron cable reels, rust-proof treatment should be done to avoid rusting due to moisture during transportation.

During transportation, cables should be prevented from direct sunlight and rain. Direct sunlight will cause aging of the cable sheath layer, affecting its service life; rain may make the cable damp, reducing its insulation performance. Therefore, it is necessary to cover the cables with waterproof cloth to ensure that the cables are in a dry and cool environment.
When loading and unloading cables, professional hoisting equipment such as cranes and forklifts must be used. It is strictly forbidden to carry them manually to avoid damage to the cable reels or cable breakage. When hoisting, appropriate lifting points should be selected to ensure that the cable reels are evenly stressed and avoid deformation of the cable reels.
During transportation, traffic rules should be observed, transportation routes and time should be reasonably arranged, and severe weather and traffic jam sections should be avoided to ensure transportation safety and on-time delivery.

(3) Delivery

The delivery process of power cables is standardized and orderly to ensure that customers can receive qualified products in a timely manner.
  1. Order Confirmation: After a customer places an order, the sales staff will communicate with the customer in a timely manner to confirm the cable's model, specification, quantity, delivery date, delivery location, and other information to ensure that the order information is accurate. At the same time, the sales staff will feedback the inventory status or production progress to the customer, allowing the customer to understand the preparation status of the product.

  1. Stock Preparation and Inspection: According to the order requirements, warehouse staff will retrieve the corresponding cables from the inventory or notify the production department to arrange production. Before delivery, quality inspectors will conduct sampling inspections on the cables to check whether the appearance, size, performance, etc. of the cables meet the order requirements and relevant standards. Only after passing the inspection can delivery be arranged.

  1. Packaging and Labeling: The inspected cables are packaged in accordance with the specified packaging methods, and clear labels are marked on the packaging, including customer name, order number, product model, specification, quantity, and other information, so that customers can check when receiving the goods.

  1. Logistics Arrangement: According to the customer's delivery location and transportation requirements, a suitable logistics company is selected, and a transportation contract is signed with the logistics company to clarify the rights and obligations of both parties. The logistics company arranges vehicles to pick up the goods at the warehouse. The warehouse staff and the logistics company staff jointly check the quantity and information of the cables, and go through the handover procedures and fill in the freight documents after confirmation.

  1. Delivery Notification: After the cables are shipped, the sales staff will promptly notify the customer of the delivery information, including the logistics company name, waybill number, estimated arrival time, etc., to facilitate the customer to track the transportation status of the goods. At the same time, the sales staff will maintain communication with the customer and promptly handle any problems that may arise during transportation.

(4) Samples

In order to allow customers to better understand the performance and quality of power cables of different specifications, the enterprise provides sample services.
  1. Sample Application: Customers can apply for samples from the enterprise by phone, email, online platform, etc., indicating the model, specification, quantity and other information of the required samples. The enterprise's sales staff will contact the customer within 24 hours after receiving the application to confirm the sample details and delivery address.

  1. Sample Preparation: The preparation of samples strictly follows the production process of formal products to ensure that the performance and quality of the samples are consistent with the bulk products. The production department will select raw materials that meet the specifications for production according to customer needs, and produce samples through core production, insulation layer extrusion and cross-linking, cabling, sheath extrusion and other links.

  1. Sample Inspection: After the samples are prepared, the quality inspection department will conduct a comprehensive inspection on them, including appearance, size, performance and other items, to ensure that the samples meet relevant standards and customer requirements.

  1. Sample Delivery: The qualified samples will be simply packaged with sample labels attached, indicating the model, specification, production batch number and other information of the samples. Then they will be sent to the customer by express, and the sales staff will inform the customer of the express tracking number to facilitate the customer to check the delivery progress of the samples.

  2. Sample Fees: Sample fees are usually borne by the customer, including the production cost and transportation cost of the samples. If the customer places a bulk order subsequently, the enterprise will appropriately reduce or refund the sample fees according to the order amount, which can be negotiated with the sales staff.

    (5) After-sales Service

    The enterprise provides comprehensive after-sales service for power cables to protect the legitimate rights and interests of customers.
    1. Quality Guarantee: The enterprise promises that the product quality meets relevant national standards and industry standards, and provides a quality guarantee period of 1-3 years from the date of product delivery. Within the quality guarantee period, if the cable cannot be used normally due to its own quality problems, the enterprise will provide free repair or replacement services for the customer.

    1. Technical Support: Customers can contact the enterprise's technical support department at any time if they encounter any technical problems during the installation, use, and maintenance of the cables. Technical personnel will provide professional technical guidance to customers through phone calls, emails, videos, etc., answer customers' questions, and help them solve practical problems. For complex technical issues, the enterprise can arrange technical personnel to conduct on-site guidance.

    1. Fault Handling: If the cable fails during use, customers can call the after-sales service hotline to report the fault. After-sales service personnel will respond promptly, understand the fault situation, and arrange professional maintenance personnel to go to the site for handling. Maintenance personnel will test and diagnose the faulty cable, determine the cause of the fault, and take corresponding maintenance measures to restore the normal operation of the cable as soon as possible.

    1. Customer Feedback: The enterprise attaches great importance to customers' feedback and has set up special customer feedback channels, such as suggestion boxes and complaint hotlines. Customers can put forward opinions and suggestions on product quality, service attitude, etc. The enterprise will promptly handle and improve the problems reflected by customers, continuously improving product quality and service level.

    2. Return and Exchange Policy: If the received cable has quality problems or does not meet the order requirements, customers can apply for return or exchange within 7 days after receiving the goods. The enterprise will review the application, and if the situation is true, it will handle the return or exchange procedures for the customer and bear the corresponding transportation costs. For returns and exchanges due to non-quality problems, customers need to bear the round-trip transportation costs, and the cable must be kept intact without affecting secondary sales.

      Tags relacionadas: Power Cable 3X25 Cable 3X50 Cable
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