I. Product - related Information
(I) Specification Parameters
The 50mm 4 - core steel wire armoured (SWA/AWA) cable, as a key equipment in the power transmission system, its specification parameters are the core to ensure efficient and safe power transmission. Each parameter has been accurately calculated to adapt to different power transmission scenarios.
The conductor cross - sectional area of this cable is 50mm², and it adopts a 4 - core design. The 4 - core structure includes three phase wires and one neutral wire, which can meet the power transmission requirements of the three - phase four - wire system. It can transmit the neutral wire while transmitting the phase wires, and is suitable for power systems that need to balance the three - phase load. The 50mm² conductor cross - section endows the cable with strong current - carrying capacity, which can reduce power loss during long - distance power transmission. It can usually meet the power needs of scenarios such as medium and large industrial equipment and main distribution lines in large residential communities.
In terms of insulation performance, the XLPE (cross - linked polyethylene) insulation layer is an important part of it. This insulation layer has excellent insulation resistance and voltage - withstanding performance. The long - term allowable operating temperature can reach 90℃, and it can withstand higher temperatures during short - term overload. This enables the cable to operate stably even when the power load fluctuates greatly. At the same time, the XLPE insulation layer has low dielectric loss, which can effectively reduce energy loss during power transmission.
The specifications of the steel wire armoured (SWA/AWA) layer are carefully designed. The diameter and winding density of the armoured steel wire are determined according to the overall strength requirements of the cable, which can provide strong mechanical protection for the cable. When laid underground, it can withstand soil pressure, rolling of external heavy objects and mechanical impacts during construction, protecting the internal conductors and insulation layer from damage. The existence of the armoured layer also improves the tensile performance of the cable, facilitating the dragging operation during laying.
The overall outer diameter of the cable is determined by the conductor, XLPE insulation layer, armoured layer and outer sheath. The reasonable outer diameter design enables it to adapt to common underground pipe sizes. When laid in the soil, it will not increase the construction difficulty due to too large outer diameter. At the same time, all layers are closely combined to ensure the overall stability of the cable. In addition, the bending radius of the cable meets relevant standards, which can adapt to certain terrain changes and corners during underground laying, avoiding structural damage caused by excessive bending.
With its excellent performance, the 50mm 4 - core
Steel Wire Armoured Cable has a wide range of characteristic uses in the power transmission system, especially in underground laying scenarios.
In large industrial plants, this cable is an ideal choice for power transmission. Large factories have many high - power production equipment, with a large demand for electricity and a long transmission distance. Laying it underground as the main power transmission line in the factory area can stably transmit electricity from the substation to each production workshop. The steel wire armoured layer can resist external impacts that may be caused by the operation of heavy machinery such as forklifts and cranes in the factory area. The XLPE insulation layer can ensure the insulation performance under high load operation, ensuring the stable power supply of production equipment and reducing production losses caused by power outages.
This cable also plays an important role in urban infrastructure construction. For example, the supporting power transmission of urban subway systems and the distribution lines of large sewage treatment plants. The power transmission lines of these infrastructure usually need to be laid underground. The armoured layer of the cable can withstand the pressure and erosion of the complex underground environment, and the aging resistance of the XLPE insulation layer can ensure the long - term stable operation of the cable, providing power guarantee for the normal operation of urban infrastructure.
The distribution system of large residential communities is also inseparable from this cable. With the improvement of residents' living standards, there are more and more household electrical equipment, and the total power load of the community is constantly rising. Using 50mm 4 - core steel wire
Armoured Cable as the main
Distribution Cable of the community and laying it underground can meet the power needs of a large number of residents. The underground method will not affect the greening and beauty of the community. The armoured layer can protect the cable from soil corrosion and external construction damage, ensuring the safety and continuity of residents' electricity use.
In addition, this cable is often used in power transmission of some important public facilities, such as large stadiums and convention and exhibition centers. These places have dense electrical equipment, large power demand and high requirements for power supply reliability. Laying the cable underground can avoid possible faults of
Overhead Lines. The combination of steel wire armouring and XLPE insulation can ensure continuous and stable power transmission, meeting the power demand during large - scale events.
The material selection and style design of the 50mm 4 - core steel wire armoured cable are closely related to its performance and use. High - quality materials and reasonable styles are the basis for its excellent performance.
The conductor generally uses high - purity copper material. Copper has excellent conductivity and low resistivity, which can reduce energy loss during power transmission and ensure the efficiency of power transmission. The surface of the high - purity
Copper Conductor is smooth and free of impurities, which can be closely combined with the XLPE insulation layer, avoiding local overheating caused by poor contact. For some scenarios that are more sensitive to cost, high - quality
Aluminum Conductors can also be used. After special treatment, their conductivity can also meet the use requirements, and they are lighter in weight and lower in cost.
XLPE (cross - linked polyethylene) as the insulation layer material has many advantages. After cross - linking treatment, its molecular structure forms a three - dimensional network, and its heat resistance and mechanical strength are greatly improved. Compared with traditional polyvinyl chloride
Insulation Materials, it is more able to adapt to harsh environments such as high temperature and humidity. The XLPE insulation layer has good chemical stability, can resist the erosion of acids, alkalis and other corrosive substances in the soil, is not easy to age, and can prolong the service life of the cable. In addition, it has excellent insulation performance, which can effectively isolate the current between each core wire and prevent short - circuit faults.
The steel wire armoured (SWA/AWA) layer uses high - strength galvanized steel wire. Galvanizing treatment can enhance the corrosion resistance of the steel wire, making it not easy to rust in the underground environment, ensuring the long - term protective effect of the armoured layer. The diameter and strength of the steel wire are strictly selected to ensure that the armoured layer can provide sufficient mechanical support to resist external pressure and impact. The armoured layer is wound around the outside of the insulation layer in a spiral shape with uniform winding density, which not only ensures the protective effect, but also does not excessively increase the hardness of the cable, facilitating the laying operation.
The outer layer of the cable is usually provided with a sheath, which is generally made of PE (polyethylene) or PVC (polyvinyl chloride) material. PE sheath has good
Flexibility and corrosion resistance, is not easy to embrittle in low - temperature environments, and is suitable for use in cold areas or places with strong soil corrosion;
PVC Sheath has good wear resistance and flame retardancy, and can play a role in scenarios where friction may exist or there are certain fire prevention requirements. The sheath is tightly wrapped around the outside of the armoured layer, further blocking moisture, dust, etc. from entering the cable, and protecting the armoured layer and insulation layer.
In terms of style, the cable has a 4 - core circular structure. The 4 - core design corresponds to three - phase four - wire power transmission. Each core wire is independently insulated and arranged neatly, and the overall structure is rounded through filling materials. The circular structure allows the cable to bear force evenly when laid underground, which can disperse the soil pressure to the entire cable surface and reduce the risk of local damage. At the same time, the circular style is convenient for cable production, winding into coils, transportation and laying, and can adapt to different construction environments.
(IV) Production Process
The production process of the 50mm 4 - core steel wire armoured cable is rigorous and complex. From raw material processing to finished product inspection, each link has strict quality control to ensure that the product meets relevant standards and use requirements.
The production of the conductor is the first step. High - purity copper rods (or aluminum rods) are selected and drawn into single wires of the required diameter through a wire - drawing process. During the wire - drawing process, the wire - drawing speed and die precision are strictly controlled to ensure that the diameter of the single wire is uniform and the surface is smooth. Then, multiple single wires are stranded in a specific way to form a 50mm² conductor. During stranding, the stranding pitch and tension are well controlled to make the conductor structure compact and round, with good flexibility and mechanical strength.
The extrusion process of the XLPE insulation layer is crucial. First, the XLPE particles are dried to remove moisture in the particles to prevent bubbles in the insulation layer. The dried particles are sent to the extruder and melted into a fluid state at high temperature. Through a special extrusion die, the molten XLPE is evenly wrapped around the outside of each conductor to form an insulation layer. During the extrusion process, the temperature, pressure and speed are accurately controlled to ensure that the insulation layer has a uniform thickness, a smooth surface and is closely combined with the conductor. After extrusion, the insulation layer is cross - linked. The XLPE molecules are cross - linked by heating with steam or nitrogen to improve the insulation performance.
The 4 - core cabling process is to combine four core wires covered with insulation layers. On the cabling machine, the four core wires are stranded according to a certain stranding direction and pitch. At the same time, appropriate filling materials are filled between the core wires to make the cabled cable structure round and stable. During the cabling process, appropriate tension is maintained to avoid damage to the insulation layer due to excessive force on the core wires. After stranding, a layer of wrapping tape is wrapped around the outside to fix the position of the core wires.
The steel wire armouring (SWA/AWA) process is the key to ensuring the mechanical performance of the cable. Galvanized steel wires that meet the specifications are selected, and the steel wires are wound around the cabled cable at a certain angle and density through an armouring machine. During the winding process, the tension and winding pitch of the steel wire are controlled to ensure that the armoured layer is compact and uniform, and the lap between adjacent steel wires is reasonable, forming a strong protective layer. After armouring, check whether the armoured layer has defects such as broken wires and looseness to ensure that it can effectively resist external impacts.
The extrusion process of the outer sheath is similar to that of the insulation layer, but the materials and parameters used are different. PE or PVC particles are dried and then sent to the extruder for melting, and evenly wrapped around the armoured layer through a die to form a sheath. The thickness of the sheath should be uniform, closely attached to the armoured layer, and there should be no bubbles, cracks and other problems on the surface, playing a further role in protection and sealing.
The style of the cable is circular, with four cores arranged symmetrically, and the overall structure is compact. This style not only facilitates the construction operation during underground laying, but also enables the cable to evenly disperse pressure when stressed, reducing the possibility of local damage.
(V) Production Process
The production process of the 50mm 4 - core steel wire armoured cable is rigorous. From raw materials to finished products, it needs to go through multiple strict processes, and each step has precise quality control to ensure that the product performance meets the standards.
Raw material inspection is the first link in production. Strict testing is carried out on copper rods (or aluminum rods), XLPE particles, galvanized steel wires, sheath materials, etc., to check whether their chemical composition, mechanical properties and appearance meet the standards. Only qualified raw materials can enter the production process.
In the process of conductor stranding, advanced stranding equipment is used to ensure that the single wires are stranded evenly and tightly. The diameter and roundness of the conductor are monitored in real time. Each batch of conductors is tested for DC resistance to ensure that the conductivity meets the requirements. The
Stranded Conductor needs to be surface treated to remove oil and impurities, preparing for the extrusion of the insulation layer.
When extruding the XLPE insulation layer, a precision extrusion control system is used to achieve precise control of temperature, pressure and speed. The extruded insulation layer is immediately cooled and shaped to ensure dimensional stability. Sampling inspection is carried out on the thickness and eccentricity of the insulation layer to ensure that they meet the design standards. Cross - linking treatment is carried out in a special cross - linking pipe, and the temperature and time are strictly controlled to ensure that the cross - linking degree meets the standard. The cross - linked insulation layer needs to undergo voltage - withstanding test and insulation resistance test.
In the cabling process, an automatic cabling machine is used, and sensors are used to monitor the tension and stranding pitch of the core wires to ensure the stable cabled structure. The filling materials used must meet the requirements of environmental protection and aging resistance. The wrapping tape must be wound tightly and flat to prevent the core wires from loosening. The cabled cable needs to be checked for outer diameter and roundness.
During steel wire armouring, the armouring machine is equipped with a tension control system to ensure uniform tension of the steel wire winding. Regularly check the diameter of the steel wire and the quality of the galvanized layer. During the winding process, real - time monitoring of the appearance of the armoured layer is carried out through visual inspection equipment to timely detect and handle problems such as broken wires and overlaps. The armoured cable needs to undergo mechanical performance tests, such as impact resistance and compression resistance tests.
In the process of sheath extrusion, precise extrusion control is also adopted to ensure uniform sheath thickness and surface quality. The extruded sheath is cooled, and then its thickness, eccentricity and environmental stress cracking resistance are tested.
Finished product inspection is the last checkpoint. The cable is subject to overall tests, including electrical performance tests such as DC resistance, insulation resistance, power frequency voltage withstand and partial discharge, as well as mechanical performance tests such as bending and stretching. At the same time, check whether the appearance and marks meet the requirements. Only products that pass all test items can leave the factory.
II. General Product Information
(I) Packaging
The packaging design of the 50mm 4 - core steel wire armoured cable focuses on protecting the cable from damage during storage and transportation, while taking into account convenience and clear identification.
Cables are usually packaged with wooden or metal reels. The size of the reel is determined according to the length and weight of the cable to ensure that it has sufficient strength to support the cable. Both sides of the reel are equipped with strong baffles, the height of which is higher than the winding height of the cable to prevent the cable from sliding off during transportation and storage. The cable is neatly wound on the reel, and appropriate tension is maintained during winding to avoid loosening, twisting or surface damage caused by mutual friction.
The outside of the reel and the cable is tightly wrapped with a plastic film to form a moisture - proof and dust - proof barrier, preventing the cable from getting damp and contaminated with dust. For cables that need long - distance transportation or storage in humid environments, a layer of waterproof canvas is covered outside the plastic film to further enhance moisture - proof and sun - proof capabilities, avoiding the impact of rain and direct sunlight on the cable.
Clear labels are pasted on the baffles of the reel, indicating the product name, model and specification (50mm 4 - core steel wire armoured cable), length, production batch number, production date, implementation standard, manufacturer name and contact information, etc. The labels are made of wear - resistant materials to ensure that the information is clearly identifiable during transportation and storage. At the same time, warning signs such as "Moisture - proof", "Sun - proof" and "Do not press heavily" are also marked on the labels to remind relevant personnel to handle them correctly.
For small batches or short - length cables, solid wooden boxes can be used for packaging. Moisture - proof paper and buffer materials are laid inside the wooden box to prevent the cable from shaking and colliding in the box. Product information and warning signs are also marked on the outside of the wooden box for easy identification and handling.
(II) Transportation
The transportation of 50mm 4 - core steel wire
Armoured Cables must follow strict specifications to ensure that the cables are intact during transportation.
The transportation method is selected according to the transportation distance and quantity. For long - distance transportation with a large quantity, railway or road freight is usually used. For railway transportation, the reels are placed stably in the freight carriage, and the reels are fixed at the bottom of the carriage with steel wire ropes or special fastening belts to prevent sliding or toppling during transportation. Leave an appropriate gap between the reels to avoid mutual collision. For road transportation, a truck with sufficient load - bearing capacity is selected, and the carriage must be flat, clean and free of sharp debris. They are also fixed in the same way, and violent operations such as sudden braking and sharp turns are avoided during driving.
For short - distance transportation or small - batch transportation, logistics vehicles can be used. Before transportation, check whether the packaging is intact to ensure that the reels or wooden boxes are firm. Special hoisting equipment is used during loading and unloading. The hoisting point is selected at the central axis of the reel. Hoisting from the side is strictly prohibited to prevent reel deformation or cable damage.
The following matters should be noted during transportation: Cables should avoid open - air transportation. If it is unavoidable, they must be covered with waterproof canvas to prevent sun and rain; Keep away from fire sources, heat sources and corrosive substances to avoid aging or damage to the cable insulation layer and sheath; Regularly check the fixing of the cable during transportation, and reinforce it in time if it is loose; Transport vehicles should choose routes with good road conditions to reduce the impact of bumps on the cable.
After arriving at the destination, it is necessary to check the packaging and appearance of the cable with the receiver to ensure they are intact before going through the handover procedures. If there is packaging damage or signs of cable damage, it should be recorded and communicated in time.
(III) Delivery
The delivery process of 50mm 4 - core steel wire armoured cables focuses on efficiency and accuracy to ensure that customers can receive qualified products on timeand in good condition.
After a customer places an order, the sales department promptly transmits the order information to the warehouse and the production department. The warehouse checks the inventory. If there is stock, it arranges for goods preparation immediately; if it is a customized order, the production department organizes production in accordance with the order requirements and notifies the warehouse for storage after completion.
When preparing goods, warehouse staff conduct a comprehensive inspection of the cables, including checking whether the model specifications, length, appearance, and packaging meet the order requirements. At the same time, relevant product materials such as product certificates and test reports are sorted out and prepared. After the inspection is passed, the cables and related materials are sorted out together, waiting for delivery.
Before delivery, the warehouse contacts a professional logistics and transportation company, determines the transportation method and vehicle according to the order quantity, transportation distance, and customer requirements. A transportation agreement is signed with the transportation company to clarify the responsibilities of both parties, transportation time, and precautions. For urgent orders, priority is given to arranging delivery, and transportation resources are coordinated to ensure delivery on time.
After the goods are shipped, the warehouse promptly feeds back the logistics information (such as the name of the transportation company, waybill number, contact information, etc.) to the customer, facilitating the customer to track the logistics status. At the same time, the warehouse retains delivery records, including delivery notes and logistics documents, for future reference. If abnormalities such as delays or damage occur during transportation, it promptly communicates with the transportation company to resolve them and feeds back the handling progress to the customer.
(IV) Samples
To facilitate customers to understand the performance and quality of 50mm 4 - core steel wire armoured cables, the company provides sample services with standardized and convenient processes.
Customers can apply for samples through sales personnel, official websites, or customer service hotlines. When applying, they need to provide information such as the specification, quantity (usually 1 - 3 meters), purpose, and contact information of the required samples. For customers with clear purchase intentions, sample applications will be processed with priority.
Samples are prepared in strict accordance with the standards of mass - produced products to ensure that the samples are consistent with mass - produced products in terms of material, structure, and performance. After the samples are cut, the two ends are processed to remove burrs to prevent damage to the packaging or scratches to personnel during transportation. Samples are packaged in small reels or sealed packaging, with sample labels and brief descriptions attached.
In terms of sample costs, for potential major customers or those with clear purchase plans, samples can be provided free of charge, and the freight can be negotiated between the company and the customer; for ordinary consulting customers, a certain sample fee (including material and processing fees) may be charged. If a purchase is made later, the sample fee can be deducted from the payment.
Samples are usually shipped by express, and the tracking number is informed to the customer before shipment to facilitate tracking. After the customer receives the samples, if there are any questions, technical personnel can provide professional answers and testing guidance. The company will collect customers' feedback on the samples as a reference for improving products and services.
(V) After - sales Service
The company provides perfect after - sales service for 50mm 4 - core steel wire armoured cables to protect customers' use rights and interests.
The product warranty period is 18 - 24 months from the date of delivery (specifically determined according to the use environment). During the warranty period, if the cable fails due to its own quality problems (such as insulation layer damage, conductor failure, armoured layer loosening, etc.), customers can apply for after - sales treatment with the purchase certificate.
After receiving the after - sales application, customer service personnel respond within 24 hours, understand the fault situation and make records. Technical personnel make a preliminary judgment based on the fault description. If on - site testing is required, personnel will be arranged to go to the site within the agreed time. If it is confirmed to be a quality problem, the company will repair or replace the cable for the customer free of charge; if the fault is caused by improper use, incorrect installation by the customer, or force majeure, paid repair services are provided, and corresponding material and labor costs are charged.
The company also provides professional technical support services, including consulting and guidance on cable laying, installation, and maintenance, which can be carried out by phone, email, or on - site guidance. It provides customers with product instruction manuals and maintenance manuals to guide customers to use and maintain the cables correctly and extend their service life.
Regular return visits are made to customers to understand the use of the cables and collect their opinions and suggestions on products and services. For problems reflected by customers, they are dealt with in a timely manner to improve customer satisfaction.
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