I. Product - related Information
(I) Specification Parameters
As an important equipment in the power transmission system, the 35mm 4 - core
Steel Wire Armoured Cable has specification parameters that are crucial to ensuring the stability and safety of power transmission. Each parameter has been carefully designed and calculated.
The conductor specification of this cable is 35mm², and it is of a 4 - core design. The 4 - core structure usually includes three phase wires and one neutral wire. This structure can meet the needs of three - phase four - wire power transmission and is suitable for scenarios where both phase wires and neutral wires need to be transmitted at the same time. The 35mm² conductor cross - sectional area enables the cable to have a strong current - carrying capacity, which can efficiently transmit electricity within a certain range and cope with the power load of small and medium - sized power transmission systems, such as branch transmission in industrial parks and distribution trunk lines in residential communities.
In terms of insulation performance, XLPE (cross - linked polyethylene) is used as the insulating material. The XLPE insulation layer has excellent insulation resistance and voltage resistance performance, which can effectively isolate current leakage between conductors and between conductors and the outside, ensuring the safety of power transmission. Its long - term allowable operating temperature is relatively high, generally stable at 90°C. It can even withstand higher temperatures during short - term overload, which provides a certain safety margin for the cable when the power load suddenly increases.
The specifications of the steel wire armouring (SWA) layer also have clear standards. The diameter and winding density of the armoured steel wire are designed to provide sufficient mechanical strength for the cable, so that it can withstand soil pressure, rolling of external heavy objects and mechanical impacts that may be encountered during construction when laid underground. The existence of the armouring layer also improves the tensile performance of the cable, facilitating dragging and laying operations during underground laying.
The overall outer diameter of the cable is determined by the conductor, XLPE insulation layer, armouring layer and outer sheath. The reasonable outer diameter design allows the cable to adapt to common pipe sizes and soil environments when buried, without increasing the laying difficulty due to an excessively large outer diameter. At the same time, it can also ensure the close combination between the layers, avoiding loosening or delamination. In addition, the bending radius of the cable also meets relevant specifications, which can adapt to certain terrain changes and corner requirements during underground laying.
With its unique structural and performance advantages, the 35mm 4 - core steel wire
Armoured Cable has clear and extensive characteristic uses in the power transmission system, especially in underground laying scenarios.
It plays an important role in power distribution in industrial parks. There are many small and medium - sized enterprises in industrial parks. The power demand for production equipment and office use is stable and the total amount is relatively large, so a reliable power transmission line is needed to connect the distribution room with each enterprise. Since the ground in industrial parks is mostly hardened roads or green belts, underground laying can avoid the impact of
Overhead Lines on the park's landscape and ground traffic. The steel wire armouring layer can protect the cable from external impacts caused by vehicle driving and construction machinery operations in the park, and the XLPE insulation layer can ensure the stability of power transmission, meeting the power supply needs of the park.
The power distribution system of residential communities is also one of its main application scenarios. With the improvement of residents' living standards, there are more and more household electrical equipment, and the power load of residential communities is constantly rising. Using this cable as the community's distribution trunk line for underground laying can safely transmit electricity from the substation to the distribution boxes of each building. The underground method does not occupy the ground space of the community and does not affect the greening and residents' activity areas of the community. At the same time, the armouring layer can resist the damage of corrosive substances in the soil and underground organisms, ensuring the long - term stable operation of the cable and providing continuous power guarantee for residents.
It is also applicable to urban road lighting and power supply for municipal facilities. Municipal facilities such as street lamps and traffic lights on both sides of urban roads need stable power supply, and the power supply lines of these facilities usually adopt underground laying. The 35mm 4 - core steel wire armoured cable can work normally in the complex underground environment of roads (such as soil pressure, groundwater erosion, etc.). The combination of the armouring layer and the XLPE insulation layer can effectively cope with these challenges, ensuring the uninterrupted power transmission of municipal facilities and maintaining the normal operation of the city.
In addition, in some temporary power transmission scenarios, such as temporary power supply for large - scale outdoor activities and emergency power transmission during disaster relief, if short - term underground laying of cables is required, this cable can also meet the needs. Its strong mechanical strength and stable electrical performance can provide reliable power support during temporary use, and the laying and recycling processes are relatively convenient.
The material selection and style design of the 35mm 4 - core steel wire armoured cable are closely related to its performance and use. The high - quality material combination and reasonable style structure are the basis for its excellent performance.
The conductor usually uses high - purity copper or aluminum.
Copper Conductors have excellent conductivity and low resistivity, with little energy loss during power transmission, which is suitable for scenarios with high requirements for transmission efficiency;
Aluminum Conductors have relatively low cost and light weight, and are widely used in scenarios where cost is more sensitive and the transmission distance is not particularly long. No matter which kind of conductor is used, its surface is treated to ensure it is smooth and free of burrs, so as to ensure close combination with the XLPE insulation layer.
The insulation layer is made of XLPE (cross - linked polyethylene), which is a polymer material treated by cross - linking technology. Compared with traditional polyvinyl chloride insulating materials, XLPE has better heat resistance and aging resistance, and is not easy to embrittle or crack due to temperature changes and environmental influences during long - term use. It also has strong chemical stability and can resist the erosion of acids, alkalis and other corrosive substances in the soil, ensuring the long - term stability of insulation performance.
The steel wire armouring (SWA) layer is made of high - strength galvanized steel wire. Galvanizing treatment can enhance the corrosion resistance of the steel wire, avoiding rust and damage due to moisture and soil erosion in the underground environment. The steel wire is wound around the outside of the insulation layer at a certain angle and density to form a solid armouring structure, providing mechanical protection for the cable and resisting external pressure and impact. The winding method of the armouring layer is optimized to ensure mechanical strength without excessively increasing the weight and hardness of the cable.
The outer sheath is generally made of PE (polyethylene) or PVC (polyvinyl chloride). PE sheaths have excellent corrosion resistance and
Flexibility, are not easy to embrittle in low - temperature environments, and are suitable for underground laying in cold areas or areas with strong soil corrosion;
PVC Sheaths have good wear resistance and flame retardancy, and can be used in some environments where friction and potential fire risks may exist. The sheath tightly wraps around the armouring layer to further isolate moisture, dust and corrosive substances and protect the internal structure.
In terms of style, the cable has a 4 - core circular structure. The 4 - core design meets the needs of three - phase four - wire power transmission, with each core wire arranged in order and isolated from each other by the insulation layer to avoid short circuits. The circular structure makes the force on the cable uniform, which can evenly distribute the soil pressure to the entire cable surface during underground laying, reducing the risk of local damage. At the same time, the circular style is convenient for cable production and processing, winding into coils, as well as transportation and laying operations.
(IV) Production Process
The production process of the 35mm 4 - core steel wire armoured cable is rigorous and complex. Each link from raw material processing to finished product inspection has strict quality control to ensure that the product meets relevant standards and use requirements.
The production of the conductor is the first step in production. For
Copper Conductors, high - purity copper rods need to be drawn into
Copper Wires of the required diameter through a wire drawing machine. During the wire drawing process, the wire drawing speed and die precision must be controlled to ensure the uniform diameter and smooth surface of the copper wires. Then, according to the cross - sectional requirements of 35mm², multiple copper wires are stranded to form a conductor core. During the stranding process, a certain tension and pitch must be maintained to ensure the roundness and flexibility of the conductor. The production process of
Aluminum Conductors is similar to that of copper conductors, but there are slight differences in the parameters of wire drawing and stranding.
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 die, the molten XLPE is evenly wrapped around each conductor core to form an insulation layer. During the extrusion process, the temperature, pressure and extrusion speed must be accurately controlled to ensure that the insulation layer has a uniform thickness, a smooth surface and is closely combined with the conductor core. After extrusion, the insulation layer needs to undergo cross - linking treatment. By heating, the XLPE molecules form a three - dimensional network structure, thereby improving its heat resistance and mechanical strength.
The 4 - core cabling process is to combine four core wires covered with insulation layers in a certain stranding way. During stranding, the position of each core wire must be stable with uniform gaps. Usually, some filling materials are filled between the core wires to make the cabled structure more round. During the cabling process, the stranding tension must be controlled to avoid damage to the insulation layer due to excessive stretching or extrusion of the core wires.
The production of the steel wire armouring layer requires the selection of galvanized steel wires that meet the specifications, and the steel wires are spirally wound around the cabled cable through an armouring machine. During winding, the tension and winding angle of the steel wire must be controlled to ensure that the steel wires are arranged closely and evenly, and the lap between adjacent steel wires is reasonable to ensure the overall mechanical strength of the armouring layer. After armouring, the armouring layer must be inspected to ensure there are no defects such as looseness and broken wires.
The extrusion of the outer sheath is the last key process. The sheath material (PE or PVC) is added to the extruder, heated and melted, and then evenly wrapped around the armouring layer through a die to form a sheath. During the extrusion process, the thickness of the sheath must be ensured to be uniform, closely attached to the armouring layer, and there are no defects such as bubbles and cracks on the surface. The existence of the sheath not only protects the armouring layer from corrosion, but also further enhances the overall sealing of the cable.
The finished product inspection link includes electrical performance tests (such as insulation resistance and voltage withstand tests), mechanical performance tests (such as tensile strength and bending performance tests), as well as appearance and size inspections. Only cables that meet all test items can leave the factory.
II. General Product Information
(I) Packaging
The packaging design of the 35mm 4 - core steel wire armoured cable aims to protect the cable from damage during storage and transportation, and at the same time takes into account the convenience of packaging and the clarity of identification.
For coiled cables, wooden or metal reels are usually used for packaging. The diameter and strength of the reel are determined according to the length and weight of the cable to ensure it can stably carry the cable. The cable is neatly wound on the reel, and a proper tension is maintained during winding to avoid loosening, mutual friction or twisting of the cable. Both sides of the reel are equipped with solid baffles, and the height of the baffles is higher than the winding height of the cable to prevent the cable from sliding off both sides of the reel. The central axis of the reel is provided with a lifting hole, which is convenient for using lifting equipment during loading, unloading and transportation.
The outside of the reel is tightly wrapped with a plastic film to form a moisture - proof and dust - proof barrier, preventing the cable from being eroded by moisture and dust during storage and transportation. For cables that need long - distance transportation or long - term storage, a layer of waterproof canvas is covered outside the plastic film to further enhance the protective effect and avoid damage to the cable caused by rain and direct sunlight.
Clear labels are pasted on the packaging. The label content includes the product name (35mm 4 - core steel wire armoured cable), specification parameters, production batch number, production date, length, implementation standard, manufacturer name and contact information, etc. At the same time, warning signs such as "Keep away from moisture", "Keep away from sunlight" and "Do not press heavily" are also marked on the labels to remind relevant personnel to pay attention to protection when handling the cable.
For small - length cable samples or scattered orders, solid cartons are usually used for packaging. Buffering materials (such as foam boards and bubble films) are placed inside the cartons to prevent the cable from being damaged due to collision during transportation. The relevant product information and warning signs are also marked on the outside of the cartons.
(II) Transportation
The transportation of 35mm 4 - core steel wire
Armoured Cables must follow strict specifications to ensure that the cables remain intact during transportation and are safely delivered to the destination.
The transportation method is selected according to factors such as transportation distance and transportation volume. For large - quantity and long - distance transportation, railway transportation or road freight is usually adopted. For railway transportation, the reels wrapped with cables are placed stably on the flat plate of the railway freight car, and the reels are firmly fixed on the carriage with steel wire ropes or special fastening belts to prevent the reels from rolling and colliding during transportation. A certain gap must be left between the reels to avoid mutual extrusion damage.
Road freight is suitable for medium - and short - distance transportation or orders with high requirements on transportation time. The transport vehicle should be a truck with sufficient load - bearing capacity, and the carriage must be flat, clean and free of sharp debris. The fixing method of the cable reel is the same as that of railway transportation. At the same time, the driving speed must be controlled according to road conditions to avoid violent operations such as sudden braking and sharp turns, and reduce the impact on the cable.
For small - batch or sample cables, logistics express transportation can be used. Before transportation, the cable must be properly packaged to ensure that it will not be damaged due to bumps and collisions during transportation. Choose a reputable logistics or express company with experience in transporting large goods, and inform them of the characteristics of the cable and transportation precautions.
The following matters must 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 damage to the insulation layer and sheath of the cable; when loading and unloading cables, special lifting equipment must be used. The lifting point should be selected at the central axis of the reel. Lifting from the side of the reel is strictly prohibited to prevent the reel from deforming or the cable from sliding off; during handling, dragging and throwing of cable reels are prohibited to avoid severe impact on the cables.
Transport personnel should be familiar with the characteristics and transportation requirements of the cables, regularly check the fixing status of the cables and the integrity of the packaging, and handle abnormalities in a timely manner. After arriving at the destination, they must check the packaging and appearance of the cable with the receiver, and go through the handover procedures only after confirming that there is no damage.
(III) Delivery
The delivery process of 35mm 4 - core steel wire armoured cables focuses on efficiency and accuracy. Each link from order processing to goods delivery has clear operating specifications to ensure that customers can receive products that meet the requirements on time.
After the customer places an order, the sales department will promptly enter the order information into the system and transmit it to the warehouse and production department (for spot orders, it will directly notify the warehouse). After receiving the order, the warehouse immediately checks the inventory to confirm that the model, specification and quantity of the product are consistent with the order. For customized orders, the production department will arrange production according to the order requirements and notify the warehouse for storage in a timely manner after production is completed.
When preparing goods in the warehouse, a comprehensive inspection of the cable will be carried out, including checking whether the appearance is intact, whether the packaging meets the standards, and whether the identification is clear and accurate. At the same time, relevant product materials, such as product certificates, test reports and user manuals, are sorted out and prepared to be sent with the goods.
Before delivery, the warehouse will contact the transport company, determine the appropriate transport method and vehicle according to the order quantity and transportation distance, and sign a transport agreement with the transport company to clarify the rights and obligations of both parties. For urgent orders, priority will be given to arranging delivery, and transport resources will be coordinated to ensure delivery within the time required by the customer.
After the goods are delivered, the warehouse will promptly feed back the logistics information (such as the name of the transport company, waybill number, contact information, etc.) to the customer to facilitate the customer to track the transport status of the goods. At the same time, the warehouse will retain delivery records, including delivery notes and logistics documents, for future reference. If there are problems such as delayed delivery or damage to the goods during transportation, it will promptly communicate and coordinate with the transport company to solve the problems for the customer.
(IV) Samples
To help customers understand the performance and quality of 35mm 4 - core steel wire armoured cables before formal purchase, the company provides sample services for customers to test and evaluate.
Customers can apply for samples through sales personnel or official channels. When applying, they need to specify the specification, quantity (usually 1 - 2 meters) and purpose of the required samples. Samples are prepared in strict accordance with the production process of formal products to ensure that the samples are consistent with mass - produced products in terms of material,
Structure and Performance.
Samples are packaged in small reels or solid cartons, with buffering materials placed inside to prevent the samples from being damaged during transportation. The specification and number of the samples are marked on the packaging. Samples are usually sent by express, and the delivery time is generally within 1 - 3 working days after receiving the application.
In terms of sample fees, for customers with clear purchase intentions, samples can be provided free of charge, and the express fee can
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