Detailed Introduction to 4-Core 150mm², 185mm² XLPE Swa PVC Power Cables
I. From the Perspective of the Product Itself
(1) Specification Parameters
The specification parameters of 4-core 150mm² and 185mm² XLPE Swa PVC
Power Cables are rigorous and comprehensive, providing solid technical support for their stable application in medium and high-voltage distribution systems.
In terms of conductor specifications, both types of cables adopt a 4-core design. The cross-sectional area of each conductor in the 150mm² cable is 150mm², while that of the 185mm² cable is 185mm². The difference in conductor cross-sectional area directly determines their current-carrying capacity. The current-carrying capacity of the 150mm² cable is approximately 300-350A, and that of the 185mm² cable is about 350-400A. The larger current-carrying capacity enables the 185mm² cable to transmit more electrical energy, making it suitable for larger power-consuming equipment and longer-distance power transmission.
The rated voltage is one of the important parameters of the cable. The rated voltage of these two specifications is usually 0.6/1kV and above, which can meet the needs of medium and high-voltage distribution systems. A rated voltage of 0.6/1kV means that during normal operation of the cable, the power frequency voltage between the conductor and the shielding layer can reach 0.6kV, and the power frequency voltage between conductors can reach 1kV, which is sufficient for power transmission of higher voltage levels in industrial, commercial and other fields.
The outer diameter of the cable also varies with specifications. The outer diameter of the 150mm² cable is relatively small, which is convenient for laying in environments with limited space; the 185mm² cable has a larger outer diameter due to its larger conductor cross-sectional area and thicker armoring layer, so more installation space needs to be considered during laying. The specific outer diameter value will vary slightly depending on the manufacturer's process, but generally follows the rule that the larger the specification, the larger the outer diameter.
In addition, the insulation thickness and sheath thickness of the cable are also clearly specified. The thickness of the XLPE insulation layer needs to meet relevant standards to ensure good insulation performance and prevent current leakage. The thickness and wire diameter of the Swa steel wire armoring layer are also strictly designed. The armoring layer of the 185mm² cable is thicker, which can provide stronger mechanical protection and resist external forces such as extrusion and collision. The thickness of the
PVC Sheath ensures the weather resistance and protective performance of the cable, enabling it to work stably in different environments.
(2) Characteristic Applications
4-core 150mm² and 185mm² XLPE Swa
PVC Power Cables, with their excellent performance, have distinctive applications in many fields, providing reliable guarantee for power transmission in different scenarios.
In the industrial field, these two types of cables are widely used. The main distribution trunk lines of large industrial plants usually choose 185mm² cables because they can meet the power needs of large motors (such as motors above 500kW), large transformers and other high-power equipment. These equipment require stable and sufficient power supply during operation. The high current-carrying capacity and good stability of the 185mm² cable can ensure their normal operation and reduce production interruptions caused by power problems. The 150mm² cable is suitable for distribution branch lines in medium-sized workshops, which can provide power for medium-power equipment such as CNC machine tools and assembly line equipment, ensuring stable power supply while taking into account cost-effectiveness.
Commercial complexes are also important application scenarios for this cable. Commercial complexes contain a large number of shops, office buildings, entertainment facilities, etc., with complex and large total power demand. 185mm² cables can be used for the main distribution trunk lines of commercial complexes to transmit power from substations or distribution rooms to distribution rooms in various areas; 150mm² cables can be used for distribution branch lines in various areas to provide power for air conditioning systems, lighting equipment, elevators, etc. Its good insulation performance and mechanical protection ability can ensure the safe and stable power supply of commercial complexes and protect people's normal life and work.
In power transmission and distribution projects, these two types of cables also play an important role. In urban power grid transformation and rural power grid upgrading projects, 185mm² cables can be used for connection between substations and long-distance power transmission to reduce power loss; 150mm² cables can be used for power distribution from distribution stations to users to improve the reliability of power supply. In addition, in the new energy field, such as wind farms and solar
Power Stations, these two types of cables can be used to transmit electrical energy from generator sets to the power grid, adapting to the high voltage and large current requirements of new energy power generation.
Large public facilities, such as gymnasiums, airports, railway stations, etc., have extremely high requirements for the safety and stability of power supply. 185mm² cables can be used as the main power supply lines in these places to ensure that the power supply is not interrupted during large-scale events and peak passenger flow; 150mm² cables can be used for power supply of lighting, security systems, ventilation equipment, etc., providing a safe and comfortable environment for people.
(3) Material and Style
In terms of material selection and style design, 4-core 150mm² and 185mm² XLPE Swa
PVC Power Cables fully combine performance requirements and practical application scenarios, showing significant advantages.
In terms of
Conductor Materials, the cable usually uses high-purity copper or aluminum. High-purity
Copper Conductors have excellent conductivity, low resistance, low energy loss during power transmission, and can efficiently transmit electrical energy to electrical equipment, which is very suitable for scenarios with high requirements for conductivity. At the same time,
Copper Conductors also have good ductility and mechanical strength, which are easy to process and install.
Aluminum Conductors have more advantages in cost and weight. Under the same specification, the weight of
Aluminum Conductors is lighter than that of copper conductors, and the transportation and installation costs are lower. For some scenarios that are cost-sensitive and not extremely demanding on conductivity, aluminum conductors are a good choice.
The insulation layer is made of XLPE (cross-linked polyethylene) material, which is an excellent insulating material. Compared with ordinary PVC, XLPE has higher heat resistance, can maintain stable insulation performance at higher temperatures, and improves the working temperature range and overload capacity of the cable. At the same time, XLPE has strong anti-aging performance, can resist the erosion of ultraviolet rays, oxygen and other environmental factors for a long time, and prolong the service life of the cable. In addition, XLPE also has good chemical stability, and is not easy to be corroded by acids, alkalis, oils and other chemicals, ensuring the safe operation of the cable in complex environments.
The Swa (steel wire armoring) layer is made of high-quality materials such as galvanized steel wire, which has high mechanical strength. The main function of the armoring layer is to provide mechanical protection for the cable, preventing the cable from being damaged by external forces such as extrusion, collision and stretching during laying, transportation and use. The armoring layer of the 185mm² cable is thicker, and the wire diameter is larger, so the protection ability is stronger, and it can adapt to more harsh installation environments, such as buried laying and pipeline crossing.
The outer sheath is made of PVC (polyvinyl chloride) material, which has good weather resistance and corrosion resistance. The PVC sheath can protect the internal structure of the cable from the influence of the external environment, such as rain, dust, moisture, etc., ensuring the stability of the insulation performance and mechanical performance of the cable. At the same time, the PVC sheath also has a certain
Flexibility, which is convenient for the laying and installation of the cable.
In terms of style, the overall structure of the cable is compact. The
4 Conductors are arranged in order, and the outside is wrapped with XLPE insulation layer, steel wire armoring layer and PVC sheath in turn, forming a solid whole. The color of the cable is usually dark colors such as black or gray. This color is not only resistant to dirt, but also can reduce the reflection of sunlight, reduce the temperature rise of the cable in sunlight, and is conducive to the heat dissipation of the cable and the extension of its service life. The surface of the cable is printed with clear marks, including product model, specification, rated voltage, manufacturer and other information, which is convenient for users to identify and manage.
(4) Production Process
The production process of 4-core 150mm² and 185mm² XLPE Swa PVC power cables is exquisite and complex, and each link is strictly controlled to ensure that the quality and performance of the products meet relevant standards and requirements.
The production of conductors is the beginning of the whole process. For copper conductors, high-purity electrolytic copper is selected as the raw material, which is made into copper rods through smelting, ingot casting and other processes, and then the copper rods are drawn into
Copper Wires of the required diameter through a wire drawing machine. During the wire drawing process, it is necessary to accurately control the wire drawing speed, temperature and lubrication conditions to ensure that the copper wire has uniform diameter, smooth surface, and good mechanical properties and conductivity. For aluminum conductors, high-purity aluminum ingots also need to be selected, processed into aluminum rods, and then drawn into
Aluminum Wires. After that, according to the specifications of the cable, multiple copper wires or
Aluminum Wires are stranded together to form a conductor with the required cross-sectional area. During the stranding process, the roundness and flexibility of the conductor must be ensured.
Next is the extrusion and cross-linking of the insulation layer. The XLPE material is added to the extruder, heated and melted, and then uniformly coated on the surface of the conductor through a die to form a preliminary insulation layer. Then, the coated insulation layer is cross-linked. Cross-linking treatment is a key process in the production of
XLPE Insulated Cables. Common cross-linking methods include peroxide cross-linking and silane cross-linking. Through cross-linking reaction, XLPE molecules form a three-dimensional network structure, thereby improving the heat resistance, mechanical strength and anti-aging performance of the material. During the cross-linking process, parameters such as temperature and time need to be strictly controlled to ensure that the cross-linking degree meets the requirements.
After the insulation layer is processed, the cabling process is carried out. The 4 conductors with insulation layers are cabled according to a certain stranding method. During stranding, the tension between the conductors must be uniform and the positions must be accurate to ensure the stable structure of the cabled cable. During the cabling process, some filling materials, such as polypropylene ropes, are also filled between the conductors to ensure the roundness of the cable and facilitate the subsequent processes.
After cabling, steel wire armoring is performed. Materials such as galvanized steel wire are wound around the cabled core through an armoring machine to form a steel wire armoring layer. During the armoring process, it is necessary to control the winding density and tension of the steel wire to ensure that the armoring layer is uniform and tight, and can provide effective mechanical protection for the cable. Due to its larger specification, the 185mm² cable requires more steel wires and greater tension during armoring to ensure the strength of the armoring layer.
Finally, the sheath is extruded. The PVC material is added to the extruder, heated and melted, and then coated on the outside of the armoring layer through a die to form a PVC sheath. During the sheath extrusion process, it is necessary to accurately control the temperature, pressure and speed to ensure that the sheath has uniform thickness, smooth surface, and is closely combined with the armoring layer without bubbles, impurities and other defects. After the sheath extrusion is completed, the cable also needs to go through cooling, traction, cutting and other processes to form the final product.
During the production process, multiple quality inspections are required. From the inspection of raw materials to the inspection of semi-finished products in each process, such as the resistance of conductors, the thickness and dielectric loss of insulation layers, the quality of armoring layers, the thickness and weather resistance of sheaths, etc., to the overall performance testing of finished cables, such as withstand voltage test, partial discharge test, mechanical performance test, etc., to ensure that each batch of cables meets relevant standards and technical requirements. Only cables that pass strict inspection can leave the factory for sale.
II. From the Perspective of General Product Information
(1) Packaging
The packaging design of 4-core 150mm² and 185mm² XLPE Swa PVC power cables fully considers the characteristics of the product and the needs of transportation and storage, aiming to protect the cable from damage during the entire circulation process and ensure the quality and performance of the product.
For coiled cables, wooden cable reels are usually used for packaging. Wooden cable reels have the characteristics of high strength and good stability, and can withstand the weight of the cable and external impact during transportation. The size of the cable reel is designed according to the length and specification of the cable. Due to the different outer diameters and weights of 150mm² and 185mm² cables, the sizes of the cable reels used are also different. The cable reel of the 185mm² cable has a larger diameter and width to adapt to its larger volume and weight.
Solid baffles are arranged on both sides of the cable reel, and the height of the baffles is higher than the winding height of the cable, which can effectively prevent the cable from slipping during transportation and handling. Metal hooks or holes are installed on the baffles, which is convenient for loading, unloading and handling with forklifts, cranes and other equipment, improving work efficiency and avoiding damage to the cable caused by manual handling.
When the cable is wound on the cable reel, it is necessary to control the winding tension to make the cable arranged closely, so as to avoid loosening, twisting or mutual friction during transportation. After winding, the outer layer of the cable is wrapped with a moisture-proof and dust-proof plastic film, which is closely attached to the surface of the cable, and can effectively block moisture, dust, impurities, etc. from entering the cable, protecting the insulation layer and armoring layer of the cable from damage.
A detailed label is pasted on the side of the cable reel, which clearly indicates the product name, model specification (150mm² or 185mm²), length, rated voltage, production batch number, production date, implementation standard, manufacturer name and contact information, etc. This information not only facilitates users to identify and accept the product, but also provides convenience for product traceability and quality tracking. For exported cables, the information on the label will also be translated into the corresponding foreign language to meet the requirements of the international market.
During storage, packaged cables should be stored in a dry, ventilated, dark warehouse away from heat sources and corrosive substances. The cable reel should be placed on a flat ground and padded with wooden blocks to keep a certain distance between the cable reel and the ground to prevent the cable reel from getting damp. At the same time, it is necessary to avoid stacking heavy objects on the cable reel to prevent the cable from being crushed and affecting its performance.
(2) Transportation
The transportation process of 4-core 150mm² and 185mm² XLPE Swa PVC power cables needs to strictly follow relevant regulations and operating procedures to ensure the safety and integrity of the cable and avoid product damage due to improper transportation.
Before transportation, a comprehensive inspection of the cable packaging is required. Carefully check whether the cable reel is firm, whether the baffle is intact, whether the cable is wound neatly and tightly, whether the plastic film is well sealed, whether the label is clear and complete, etc. If any damage or looseness is found in the packaging, it should be repaired or repackaged in a timely manner until it meets the transportation requirements.
According to the specifications, quantity and transportation distance of the cables, select appropriate transport vehicles. For short-distance transportation, ordinary trucks can be used; for long-distance transportation, semi-trailers or special transport vehicles are more suitable. The carriage of the transport vehicle should be kept clean and flat, without sharp debris, to prevent scratching the cable packaging and sheath. When loading the cable, use a forklift or crane to lift the cable reel smoothly into the carriage. During the lifting process, avoid collision and extrusion of the cable reel to prevent deformation of the cable reel or loosening of the cable.
The cable reels should be placed reasonably in the carriage to ensure a stable center of gravity. Usually, the central axis of the cable reel is consistent with the driving direction of the vehicle to reduce the impact of centrifugal force during transportation. For simultaneous transportation of multiple cable reels, a certain gap should be left between the cable reels, and partitions should be used to separate them to avoid mutual friction and collision. At the same time, use steel wire ropes or chains to firmly fix the cable reel in the carriage. The fixed points should be selected on the special fixing devices of the vehicle. The tension of the steel wire ropes or chains should be moderate, which should ensure that the cable reel does not move and not be over-tightened to damage the cable reel or cable.
During transportation, drivers must strictly abide by traffic rules, maintain stable driving, avoid violent operations such as sudden braking, sharp turns and speeding, and reduce the impact and vibration on the cable. When passing through bumpy sections, bridges, tunnels and other special sections, drive slowly to ensure driving safety and cable stability. At the same time, attention should be paid to protecting the cable from severe weather. In case of rain or snow, the cable should be covered to prevent it from getting damp; in hot weather, the cable should be avoided from being exposed to the sun for a long time to prevent the sheath from aging due to high temperature.
Special personnel should be arranged for escort during transportation. The escorts should be familiar with the characteristics and transportation requirements of the cable, regularly check the fixing status and packaging of the cable, and deal with problems in a timely manner. If transportation is delayed due to traffic jams, road maintenance, etc., the recipient should be informed in time of the expected arrival time.
After arriving at the destination, use appropriate equipment to unload the cable reel from the carriage smoothly. During unloading
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