Details of 0.6/1kv 3X185mm2+95mm2 Cu/XLPE/LSZH Wdz-Yjy Crosslinked Polyethylene Insulation Underground Power Cable
I. Product - Related Information
(I) Specifications and Parameters
This Wdz - Yjy
Type Cable has a rated voltage of 0.6/1kV and a specification of 3X185mm² + 95mm². It is a cable specially designed for underground power transmission. Various parameters have been accurately calculated to adapt to the complex underground power transmission environment.
The cable adopts a 4 - core structure, with 3 main wires having a cross - sectional area of 185mm² and 1
Ground Wire having a cross - sectional area of 95mm². The main wire conductor is made of multi - strand
Copper Wires stranded, and the diameter of a single main wire conductor is about 15mm; the diameter of the ground wire conductor is about 11mm. After adding the cross - linked polyethylene insulation layer and low smoke halogen - free LSZH sheath, the overall outer diameter is about 38 - 42mm.
In terms of electrical performance, at 25℃, the current - carrying capacity of the main wire is about 280 - 300A, which can meet the needs of medium and high - voltage power transmission. The insulation resistance is not less than 1000MΩ·km at 20℃, and the insulation performance is stable, which can effectively prevent current leakage. Its maximum short - circuit withstand temperature can reach 250℃ for no more than 5 seconds, which can buy time for the operation of circuit protection devices when a short - circuit fault occurs.
In terms of mechanical performance, the bending radius of the cable is not less than 12 times the outer diameter of the cable, which is convenient for steering operations during underground laying. The cable can withstand a radial pressure of not less than 10kN and can resist the pressure of underground soil. At the same time, it has good tensile performance and can bear the traction force during laying.
(II) Characteristic Uses
Urban Underground Trunk Lines
In the construction of urban power networks, the cable can be used as an underground power trunk line to connect substations in different urban areas. For example, in the power connection between new urban areas and old urban areas, using it as a trunk line can realize stable power transmission and meet the increasing power demand of new urban areas. Due to its large current - carrying capacity, it can reduce energy loss during power transmission and ensure the economy and stability of urban power supply.
Industrial Park Power Distribution
There are many enterprises in industrial parks, and the power equipment has large and concentrated power. The cable can be used as the underground power distribution trunk line of the industrial park to distribute power from the park substation to various factories. For factories with large production equipment, such as machinery factories and chemical plants, it can also be used as a power distribution branch line in the factory area to provide reliable power for the equipment. Its corrosion - resistant and anti - aging characteristics can adapt to the complex environment such as oil stains, acid and alkali that may exist underground in industrial parks.
Large Community Power Supply
Large residential communities have a large power demand and concentrated peak power consumption. The cable can be used as the underground power distribution trunk line of the community to connect the urban power grid and the community distribution room, and then the distribution room distributes power to each residential building. In the commercial supporting areas of the community, such as supermarkets and gyms in the community, the cable can also provide stable power. Its low smoke and halogen - free characteristics can improve safety in case of fire in such crowded communities.
Municipal Engineering Supporting
The cable can be used for power transmission in municipal engineering such as sewage treatment plants and waterworks. The underground environment of these places is humid and may contain certain corrosive substances. The XLPE insulation layer and LSZH sheath of the cable can resist the erosion of water vapor and chemical substances and ensure the normal operation of power equipment. In addition, the cable is also suitable for lighting and power supply lines of large municipal projects such as municipal bridges and tunnels.
(III) Material and Style
Conductor Material
The conductor is made of high - purity electrolytic copper with a purity of more than 99.95%. High - purity copper has excellent electrical conductivity, which can reduce energy loss during current transmission and improve power transmission efficiency. The conductor has a multi - strand stranded structure, which enhances the
Flexibility of the conductor, enables the cable to better adapt to terrain changes during underground laying, and also improves the fatigue resistance of the conductor, extending the service life of the cable. The surface of the
Copper Conductor is subjected to anti - oxidation treatment, which can prevent oxidation during storage and use.
Insulation Layer Material
The insulation layer is made of cross - linked polyethylene (XLPE) material. After cross - linking treatment, the material forms a three - dimensional network structure, with excellent insulation performance and temperature resistance. It can work stably for a long time under the voltage level of 0.6/1kV, with a temperature resistance range of - 40℃ to 90℃, adapting to the change of underground temperature. The XLPE insulation layer has good chemical stability, is not easy to be eroded by oil stains, acid, alkali and other substances, and can maintain insulation performance in a variety of complex underground environments. It has high mechanical strength, and its tensile strength and elongation at break meet relevant standards, and can withstand stretching and extrusion during wiring.
Sheath Material
The sheath is made of low smoke halogen - free LSZH material, which produces very low smoke concentration when burned and does not release toxic gases such as hydrogen chloride, which can reduce the harm to personnel and equipment in case of fire. The LSZH sheath has good wear resistance and impact resistance, and can protect the internal insulation layer and conductor from external mechanical damage. At the same time, it also has certain water resistance and chemical corrosion resistance, can resist the erosion of underground water vapor and chemical substances, and adapt to the humid and impurity - rich underground environment.
Style Design
The overall cable is round with a compact structure. The
4 Cores are arranged in order, and the outer layer is wrapped with an XLPE insulation layer and an LSZH sheath in turn, with a flat and smooth appearance. This design is not only convenient for production and processing, but also conducive to passing through wire pipes and cable trays during laying. The surface of the cable is printed with clear marks, including model (Wdz - Yjy), specification (3X185mm² + 95mm²), rated voltage, manufacturer and other information, which is convenient for users to identify and select. The color is usually black, which is dirt - resistant and can absorb a certain amount of heat, reducing the impact of external temperature changes on the cable.
(IV) Production Process
Conductor Stranding
First, the high - purity electrolytic copper is inspected to ensure that its purity and performance meet the requirements. The copper material is drawn into copper wires of specified diameter through wire drawing equipment. During the wire drawing process, the wire drawing speed and die precision are strictly controlled to ensure uniform diameter of copper wires. Then, according to a specific stranding process, multiple copper wires are respectively stranded to form conductors of 185mm² and 95mm². A regular stranding method is adopted during stranding to ensure that the copper wires are arranged closely with uniform tension, and the stranding pitch is controlled within a reasonable range to ensure the conductivity and flexibility of the conductor. After stranding, the conductor is subjected to surface cleaning treatment to remove oil and impurities.
XLPE Insulation Layer Extrusion
The XLPE
Insulation Material is pretreated to remove moisture and impurities to avoid affecting the insulation performance. The treated material is sent to the extruder and melted and plasticized at high temperature. The molten XLPE material is evenly coated on the surface of the copper conductor through an extrusion die to form an insulation layer. During the extrusion process, the extrusion temperature, pressure and speed are accurately controlled to ensure that the insulation layer has a uniform thickness, is closely combined with the conductor, and has no defects such as bubbles and pinholes. After that, the insulation layer is cross - linked, and the XLPE molecules form a stable three - dimensional network structure through dry cross - linking to enhance its temperature resistance and mechanical strength.
Cabling
Three 185mm² main wires and one 95mm² ground wire covered with XLPE insulation layers are cabled in a certain order. A cabling machine is used for cabling to ensure that each core wire is in a stable position with uniform tension. To make the cable structure more round, appropriate filling materials can be filled between the core wires, and the filling materials need to have certain flexibility and insulation. After cabling, the cable core is wrapped and fixed with wrapping tape to prevent the core wires from loosening.
LSZH Sheath Extrusion
The LSZH sheath material is dried to remove moisture from the material. The treated material is added to the extruder and melted at high temperature. The molten LSZH material is evenly coated on the cabled core through an extrusion die to form a sheath layer. The extrusion process parameters are controlled to ensure that the sheath layer has a uniform thickness, a smooth surface and is closely combined with the cable core. After extrusion, the cable is cooled and shaped to ensure the stable shape of the sheath layer.
Finished Product Inspection
Finished cables need to go through a series of strict inspection processes. The appearance inspection mainly checks whether the sheath surface is smooth, whether there is damage and whether the marks are clear; the size measurement includes conductor diameter, insulation layer and sheath layer thickness, cable outer diameter, etc. to ensure that they meet the specification requirements; the electrical performance test covers insulation resistance test, voltage withstand test, etc. to verify the insulation performance and electrical safety of the cable; the mechanical performance test includes tensile strength, elongation at break, compressive performance, etc. to detect the mechanical strength of the cable; in addition, low smoke halogen - free performance tests such as smoke density test and toxicity index test are also required to ensure the environmental protection and safety performance of the sheath. Only cables that pass all inspection items can be stored in the warehouse.
II. General Product Information
(I) Packaging
Packaging Materials
The cable is packaged with a steel cable reel, which has high strength and strong bearing capacity, can bear the weight of the cable and the pressure during transportation, and is suitable for long - distance transportation and large - quantity storage. The thickness of the side plate of the cable reel is not less than 15mm to ensure its stability.
After the cable is wound on the cable reel, it will be wrapped with a plastic film as a whole. The plastic film can be moisture - proof and dust - proof, and protect the cable surface from pollution. For exported or long - term stored cables, a layer of linen cloth is covered outside the plastic film to further enhance the protection effect and prevent the cable from being worn during transportation and storage.
Packaging Methods
When packaging, the cable is neatly wound on the steel cable reel, and appropriate tension is maintained during winding to avoid loose or excessive stretching of the cable. After winding, the cable is tightly wrapped with a plastic film, and the interface of the film is sealed with tape.
A label is fixed on the side of the cable reel, which is marked with detailed information such as product model, specification, length, rated voltage, production batch number, production date, manufacturer's name, address and contact information. Warning signs such as "Up", "Do Not Invert" and "Handle with Care" are marked in obvious positions of the cable reel. For cable reels with large weight, lifting holes are also installed to facilitate loading and unloading.
(II) Transportation
Transportation Methods
Long - distance transportation (more than 1000 kilometers) usually adopts railway transportation or road freight. Railway transportation has good stability and is suitable for large - batch cable transportation; road freight has high flexibility and can directly reach the destination, which is suitable for medium - and short - distance and small - batch transportation. For exported cables, container shipping is adopted, which can reduce transportation costs.
Short - distance transportation (within 100 kilometers) can use small trucks, which is suitable for transporting cables from the warehouse to the construction site.
Transportation Precautions
Before transportation, the cable reel must be fixed on the transport vehicle with steel wire ropes, and there are no less than 2 fixed points to ensure that the cable reel does not shake or roll during transportation. When fixing, avoid direct contact between the steel wire rope and the cable, and a soft material can be padded at the contact point to prevent damage to the cable.
During transportation, avoid severe impact and vibration on the cable reel. The driving speed of the vehicle should not be too fast, especially on turning and bumpy sections. The transport vehicle should take rainproof measures and cover with a tarpaulin to prevent the cable from being wetted by rain.
It is strictly forbidden to mix the cable with flammable, explosive and corrosive items to avoid pollution and damage to the cable. When loading and unloading cables, special hoisting equipment is used, and the hoisting point should be at the hoisting hole of the cable reel. Hoisting on the side of the cable reel is prohibited. Keep stable during loading and unloading to avoid tilting and collision of the cable reel.
(III) Shipment
Shipment Process
After the customer places an order, the customer service personnel will check the order information within 2 hours, including product model, specification, quantity, receiving address, contact information, etc. After confirmation, a delivery note is generated and sent to the warehouse.
After receiving the delivery note, the warehouse retrieves the corresponding cable from the inventory according to the order information, counts the quantity and conducts an appearance inspection to confirm that the cable packaging is intact and free of damage. After passing the inspection, the products are transported to the shipping area.
The warehouse contacts the cooperative transport company to inform the goods information, transportation requirements and shipping time. When the transport vehicle arrives, the warehouse staff and the driver check the goods information together, go through the goods handover procedures, and assist the driver in loading the cables onto the vehicle. After loading, the warehouse staff fills in the waybill, indicating the relevant information of the goods. After shipment, the customer service personnel promptly inform the customer of the waybill number, the contact information of the transport company and the estimated arrival time.
Shipment Time
When the inventory is sufficient, orders placed before 15:00 on the same day can be arranged for shipment on the same day; orders placed after 15:00 will be shipped the next day. If the order quantity is large (more than 15 reels), it is necessary to sort out the inventory and carry out centralized scheduling, and the shipment time may be delayed by 1 working day.
Cables with customized lengths require additional cutting and packaging time, and are generally shipped within 2 - 3 working days after the order is confirmed. In case of special circumstances such as holidays and bad weather, the shipment time will be delayed accordingly, and the customer service personnel will communicate with the customer in advance.
(IV) Samples
Sample Provision
To help customers understand product quality, the company provides sample services. Customers can apply for samples from sales personnel and specify the required model and specification. The length of the sample is generally 1 meter, provided free of charge to customers. The material and production process of the samples are exactly the same as those of mass - produced products, which can truly reflect the product situation.
The transportation cost of the samples shall be borne by the customer, and the customer can choose to pay on delivery or in advance. For long - term cooperative old customers or potential customers with large purchase intentions, the company can reduce or exempt the sample transportation cost as appropriate.
Sample Delivery
After the samples are prepared, the staff will package the samples. The samples are sealed in a sealed bag, put into a hard carton, and buffer materials are filled in the carton to prevent the samples from being damaged during transportation. The sample model, specification, company name and contact information are marked on the package.
Samples are sent by express, and express companies with good service quality and fast transportation speed are selected. After the samples are sent, the sales personnel will promptly inform the customer of the express waybill number, and the customer can query the logistics status of the samples through the waybill number. Samples in domestic areas can generally be delivered within 3 - 5 working days; it may take 5 - 7 working days in remote areas.
(V) After - sales Service
Quality Assurance
The company provides a quality guarantee for the cable product, with a warranty period of 36 months from the date when the customer receives the product and accepts it. During the warranty period, if the cable has problems due to its own quality problems (such as conductor breakage, aging and cracking of the insulation layer, sheath damage and other non - human factors), the company is responsible for providing customers with free replacement of new products or maintenance.
If the cable is damaged due to improper use by the customer (such as use beyond the rated voltage, wrong laying method, external impact, etc.), the company does not assume the responsibility of free warranty, but can provide paid maintenance or replacement services, and the maintenance cost is charged according to the actual situation.
After - sales Service Process
If a customer finds a quality problem with the cable during use, he can provide feedback through customer service hotlines, online customer service, email and other channels. After receiving the feedback, customer service staff will record customer information, product specifications, purchase time, problem descriptions, and related photos or videos (if any) in detail.
Customer service staff will submit the problem to the after - sales technical team within 24 hours, and the technical team will analyze and judge the problem. If it is initially judged to be a product quality problem, the technical staff will contact the customer to further understand the situation and arrange for technical staff to conduct on - site investigation if necessary.
For confirmed product quality problems, the company will negotiate solutions (replacement or repair) with the customer and complete the relevant work within the agreed time. The replaced products will be shipped within 3 working days after the customer returns the faulty products and they pass the inspection. If it is not a product quality problem, the technical staff will explain the reasons to the customer
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