Detailed Introduction to Copper Core PE Insulated Ttu 0.6kV Cables
I. From the Perspective of the Product Itself
(I) Specification Parameters
500 Mcm Specification
The 500 Mcm copper core PE insulated Ttu 0.6kV cable has a rated voltage of 0.6kV and belongs to low-
Voltage Cables. Its conductor is made of high-purity electrolytic copper through compact stranding technology, with a conductor cross-sectional area of 500 Mcm (thousand circular mils), which is approximately 253mm² when converted to square millimeters.
In terms of current-carrying capacity, this specification cable performs outstandingly. When laid in air, the long-term allowable current-carrying capacity is about 420A; when laid in soil, due to the better heat dissipation conditions of the soil, the long-term allowable current-carrying capacity can reach 450A, which can meet the needs of high-power electricity scenarios such as large outdoor distribution trunk lines.
The insulation layer is made of polyethylene (PE) material with a thickness of 2.0mm, which has excellent insulation performance. Under 0.6kV voltage, the insulation resistance is stable above 1000MΩ, which can effectively block current and prevent electric leakage accidents.
The outer diameter of the cable is about 70mm, with a compact structure. In terms of bending radius, the static bending radius is not less than 12 times the outer diameter of the cable, and the dynamic bending radius is not less than 20 times the outer diameter of the cable. During installation and laying, this standard must be strictly followed to avoid damage to the cable due to excessive bending.
300 Mcm Specification
The 300 Mcm specification cable also has a rated voltage of 0.6kV, with a conductor cross-sectional area of 300 Mcm, equivalent to approximately 152mm². It uses the same high-purity electrolytic copper and compact stranding technology as the 500 Mcm specification.
In terms of current-carrying capacity, the long-term allowable current-carrying capacity of this specification cable is about 320A when laid in air and about 350A when laid in soil, which is suitable for scenarios such as power supply for medium-sized outdoor equipment.
The insulation layer thickness is 1.8mm, and the PE material ensures good insulation effect, with the insulation resistance also stable above 1000MΩ.
The outer diameter of the cable is about 62mm, which is smaller than that of the 500 Mcm specification, making it more advantageous in laying environments with relatively limited space. The bending radius requirements are consistent with the 500 Mcm specification, with the static bending radius not less than 12 times the cable outer diameter and the dynamic bending radius not less than 20 times the cable outer diameter, to ensure that the performance of the cable is not affected during installation.
250 Mcm Specification
The 250 Mcm specification cable has a rated voltage of 0.6kV, with a conductor cross-sectional area of 250 Mcm, equivalent to approximately 127mm². The
Conductor Material and manufacturing process are the same as those of the previous two specifications.
In terms of current-carrying capacity, the long-term allowable current-carrying capacity of this specification cable is about 260A when laid in air and about 280A when laid in soil, which can meet the power demand of branch lines and small outdoor facilities.
The insulation layer thickness is 1.6mm, and the PE material has good insulation performance, with the insulation resistance meeting the requirements for use under 0.6kV voltage.
The outer diameter of the cable is about 55mm, which is the smallest among the three specifications, making it more flexible for laying. In terms of bending radius, the static bending radius is not less than 10 times the cable outer diameter, and the dynamic bending radius is not less than 15 times the cable outer diameter, facilitating operation in various installation environments.
(II) Characteristic Uses
500 Mcm Specification
The main incoming line of industrial parks is the main application scenario of the 500 Mcm specification cable. There are many enterprises and production workshops in large industrial parks, with many high-power electrical equipment, resulting in a huge demand for electricity. This specification cable has a large current-carrying capacity and can be used as the main incoming line to efficiently and stably transmit electricity from the external power grid to the distribution center of the park, providing reliable power guarantee for production and operation in the park.
In addition, the low-voltage outgoing lines of large outdoor substations also often use this specification cable to transmit the low-voltage electricity output by the substation to various power consumption areas, ensuring the smooth distribution of electricity.
300 Mcm Specification
The main lines of municipal street lamp systems extensively use 300 Mcm specification cables. Street lamps on urban roads are widely distributed and numerous. Although the power of a single street lamp is not large, the overall power consumption is not negligible. This specification cable can be used as the main line to transmit electricity from the distribution point to the street lamps on various road sections, ensuring that the street lamps are normally lit at night and providing convenience for urban transportation and citizens' travel.
The distribution trunk lines of some medium-sized outdoor squares are also suitable for using this specification cable. The power demand of electrical equipment such as lighting equipment, landscape lamps, and small amusement facilities in the square can be met through this cable.
250 Mcm Specification
Community distribution branch lines are a typical application scenario of the 250 Mcm specification cable. In residential communities, it is necessary to distribute electricity from the main line to various buildings or units. This specification cable has a moderate current-carrying capacity and can meet the power demand of household electrical equipment in the community, such as household appliances and lighting, ensuring stable daily electricity consumption for residents.
The power distribution of small outdoor parking lots also often uses this specification cable to provide power for lighting, charging piles and other equipment in the parking lot, ensuring the normal operation of the parking lot.
(III) Material and Style
Conductor Material
The conductors of the three specifications of cables are all made of high-purity electrolytic copper with a purity of more than 99.95%. High-purity electrolytic copper has excellent conductivity, which can reduce resistance, reduce energy loss during power transmission, and improve power transmission efficiency. At the same time, after being processed by the compact stranding technology, the mechanical strength of the
Copper Conductor is greatly improved. During the production, transportation, installation and use of the cable, it can withstand external forces such as stretching and bending, is not easy to break, and ensures the structural stability of the cable and the stability of conductivity.
Insulation Layer Material
The insulation layer is made of polyethylene (PE) material. PE material has excellent weather resistance, can resist the influence of natural environmental factors such as ultraviolet radiation in sunlight and wind and rain erosion, and is not easy to age after long-term use. It also has strong corrosion resistance, can resist the erosion of acid and alkali substances, moisture in the soil and some chemical substances, and ensures that the cable maintains good insulation performance in complex outdoor and humid environments. In addition, PE material has high insulation resistance and low dielectric loss, and its insulation performance is stable under 0.6kV voltage, which can effectively prevent current leakage and ensure the safety of power transmission. This material can withstand a long-term temperature of up to 70℃ and a short-term overload temperature of 90℃, adapting to temperature changes under different working conditions.
Sheath Material
The sheath of the cable generally uses weather-resistant PE material, and some models may use other high-performance materials according to the special requirements of the use scenario. The main function of the sheath is to protect the internal conductor and insulation layer from mechanical damage, external environmental erosion and ultraviolet radiation. The weather-resistant PE sheath has good mechanical strength and
Flexibility. During cable laying and use, it can resist external forces such as extrusion and collision, and can also adapt to thermal expansion and contraction caused by temperature changes, and is not easy to crack.
Style Design
The three specifications of cables are all cylindrical in overall shape with a compact structure. The outside of the conductor is wrapped with a PE insulation layer, and the outside of the insulation layer is wrapped with a sheath to form a double-layer protection structure. The color of the cable is usually black, which has good dirt resistance and heat absorption. In outdoor environments, it can absorb heat, reduce the impact of temperature changes on cable performance, and can also blend well with the surrounding environment, with a certain degree of concealment. The surface of the cable is smooth and flat, without obvious protrusions or depressions. This design is convenient for operations such as pipe threading and dragging during installation, reducing laying resistance and improving construction efficiency.
(IV) Production Process
Conductor Production
First, high-purity electrolytic copper ingots are smelted to remove impurities, obtaining copper water that meets the purity requirements. Then, the copper water is cast into copper rods through a continuous casting process, and the diameter of the copper rods is accurately adjusted according to the specifications of the
Cable Conductor. Next, the copper rod is drawn into
Copper Wires of the required diameter by a wire drawing process. During the wire drawing process, it is necessary to strictly control the drawing speed, temperature and lubrication conditions to ensure the dimensional accuracy and mechanical properties of the copper wire. After that, multiple copper wires are stranded according to the compact stranding process. During the stranding process, pressure is applied to the copper wires through a special mold to make the copper wires closely combine, improve the filling density of the conductor, reduce the gaps inside the conductor, thereby reducing the power loss caused by the skin effect, and at the same time enhancing the mechanical strength of the conductor.
Insulation Layer Extrusion
The extrusion molding process is used to wrap the PE insulation layer around the conductor. First, PE granular material is added to the hopper of the extruder. After being heated and melted, the molten PE material is transported to the mold through the screw of the extruder. The size of the mold is accurately designed according to the cable specifications to ensure uniform thickness of the insulation layer. During the extrusion process, the extrusion temperature (generally between 150-200℃), extrusion speed and pressure are strictly controlled, so that the molten PE material evenly coats the surface of the conductor to form a continuous and dense insulation layer. After extrusion, the insulation layer is cooled to make it quickly solidify and shape, ensuring the stable performance of the insulation layer.
Sheath Extrusion
A sheath is extruded outside the insulation layer. Weather-resistant PE material is added to another extruder, heated and melted, and then evenly coated on the surface of the insulation layer through an extrusion mold. The extrusion parameters are controlled to ensure that the sheath has uniform thickness, a smooth surface, and is closely combined with the insulation layer without defects such as bubbles and impurities. The extrusion of the sheath can further enhance the mechanical protection performance and environmental erosion resistance of the cable, and extend the service life of the cable.
Quality Inspection
Strict quality inspection is carried out in each link of the production process. For the conductor, parameters such as its diameter, resistivity, tensile strength, and torsion performance are tested to ensure that the conductivity and mechanical properties of the conductor meet the standard requirements. For the insulation layer, properties such as its thickness, insulation resistance, voltage resistance, temperature resistance, and environmental stress cracking resistance are tested to ensure the insulation effect and stability of the insulation layer. For the sheath, parameters such as its thickness, tensile strength, elongation at break, and weather resistance are tested to ensure that the sheath can play an effective protective role. The finished cable also needs to undergo partial discharge tests, aging tests, bending tests, etc., to comprehensively inspect the performance of the cable. Only cables that pass all tests can leave the factory for sale.
II. From the Perspective of General Product Information
(I) Packaging
Packaging Materials
According to the specifications and lengths of the cables, appropriate packaging materials are selected. Due to its large cross-sectional area and heavy weight, the 500 Mcm specification cable is usually packaged with steel cable reels. Steel cable reels have high strength and strong bearing capacity, can withstand the weight of the cable and external impact during transportation, and are suitable for long-distance transportation and packaging of long-length cables. Cables of 300 Mcm and 250 Mcm specifications can use wooden cable reels, which have relatively low cost and light weight, suitable for medium and short-distance transportation and small-batch delivery.
Packaging Method
When packaging, the cable is neatly wound on the cable reel, arranged tightly and flatly, avoiding twisting, crossing and overlapping, so as to prevent the cable from being squeezed and worn during transportation and storage. The outermost layer of the cable is wrapped with a plastic film, which has good moisture-proof and dust-proof performance and can protect the cable from pollution by the external environment, such as dust and moisture. For steel cable reels, strong metal baffles are added on the sides to prevent the cable from slipping; wooden baffles are also added on the sides of wooden cable reels to ensure the stability of the cable during transportation and storage. A shaft sleeve is installed at the central shaft hole of the cable reel to facilitate handling and loading/unloading with equipment such as forklifts and cranes.
Packaging Marks
Relevant product information is clearly and firmly marked on the side and end face of the cable reel, including product name (copper core PE insulated Ttu 0.6kV cable), specification parameters (500 Mcm, 300 Mcm, 250 Mcm), length, rated voltage, implementation standard, production date, production batch number, manufacturer's name, address, contact information, etc. These marks not only facilitate users to quickly identify product information when receiving and inspecting the cable, but also are conducive to product quality traceability and after-sales service.
(II) Transportation
Transportation Mode
According to the transportation distance, quantity of cables and customer needs, a suitable transportation mode is selected. For long-distance transportation with large quantities, railway transportation is an ideal choice. Railway transportation has large transport capacity, low cost and stable transportation process, is less affected by external factors such as weather, and can effectively ensure the safety of the cable. For medium and short-distance transportation, road transportation can be adopted, which has high flexibility and can realize door-to-door service, facilitating customers to receive goods, especially suitable for small-batch and multi-batch transportation needs. For urgent orders or small batches of sample transportation, car express transportation can be used. Although the cost is relatively high, it can greatly shorten the transportation time and ensure the timely delivery of goods.
Transportation Precautions
Before transportation, carefully check the packaging of the cable to ensure that the cable reel is intact, the cable is tightly wound, and the plastic film is tightly wrapped. During transportation, the cable reel must be placed horizontally, and tilting, inverting or stacking are strictly prohibited to prevent the cable reel from rolling and colliding, which may cause damage to the cable. The transport vehicle should drive smoothly, avoiding violent operations such as sudden braking and sharp turns, to reduce the shaking of the cable reel. At the same time, measures should be taken to prevent rain, sun and moisture. A rain cloth can be covered on the cable reel to avoid the cable being soaked by rain, exposed to the sun or damp, which may affect the performance of the cable. When loading and unloading the cable, special lifting equipment such as cranes and forklifts must be used. During loading and unloading, handle with care to avoid impact and damage to the cable and cable reel.
Transportation Fixation
To prevent the cable reel from moving and rolling during transportation, it is necessary to fix it firmly. Steel wire ropes, iron chains, etc. can be used to tightly fix the cable reel on the carriage of the transport vehicle. The fixed points should be selected at the solid parts of the cable reel, such as the flange of the steel reel or the reinforcing ribs of the wooden reel, to ensure reliable fixation. For long-distance transportation, buffer materials such as wooden boards and rubber pads can also be placed between the cable reels to reduce mutual collision and friction between the cable reels and further protect the cable.
(III) Delivery
Delivery Process
After the customer places an order and makes payment, the sales department will promptly transmit the order information to the warehouse and production department. Warehouse personnel prepare goods according to the order information. For stock products, it is necessary to carefully check whether the specifications and quantity of the products are consistent with the order; for customized products, the production department organizes production according to the order requirements. After production is completed, the products are inspected by the quality inspection department and then transferred to the warehouse. After packaging the products, the warehouse personnel contact the transportation company to determine the transport vehicle, transportation route and transportation time. Before delivery, the delivery information, such as the name of the transportation company, license plate number, waybill number, estimated arrival time, etc., is promptly informed to the customer to facilitate the customer's preparation for receiving the goods.
Delivery Time
For regular specification cables in stock, delivery will generally be completed within 1-3 working days after receiving the customer's order and confirming payment. For cables that need to be produced according to the customer's special requirements, the delivery time will be determined according to the production cycle, usually 7-15 working days. The specific delivery time will be communicated and confirmed with the customer in advance, so that the customer can clearly understand the production progress and estimated delivery time of the goods.
Delivery Tracking
After the cable is delivered, the company will track the transportation status of the goods throughout the process. By maintaining close contact with the transportation company, timely obtain information such as the location and transportation progress of the goods. If there are abnormal situations during transportation, such as traffic jams, bad weather, etc., which cause transportation delays, the customer will be notified immediately, and active coordination with the transportation company will be made to try to shorten the delay time and ensure that the goods can be delivered to the customer as soon as possible.
(IV) Samples
Sample Provision
To allow customers to better understand the quality, performance and appearance of copper core PE insulated Ttu 0.6kV cables, the company can provide samples of the three specifications. Customers can choose samples of the corresponding specifications according to their own needs. The length of the samples is generally 1-2 meters, which can satisfy customers' inspection of the conductor material, insulation layer and sheath quality, and structural design of the cable.
Sample Cost
The samples themselves are provided to customers free of charge, but the express delivery fee for the samples needs to be borne by the customer. For large customers with clear cooperation intentions or long-term partners, the company will reduce or exempt the express delivery fee of the samples according to the actual situation to promote cooperation between the two parties.
Sample Delivery
After receiving the customer's sample request, the company will prepare the samples within 1-2 working days and package them properly. During packaging, the specification parameters and other information will be clearly marked on the samples to prevent damage or confusion during transportation. Then, the samples will be sent to the customer by a reliable express delivery method, and the express tracking number will be promptly informed to the customer to facilitate the customer's inquiry about the transportation status of the samples.
(V) After-sales Service
Quality Assurance
The company promises that the copper core PE insulated Ttu 0.6kV cables produced and sold comply with relevant national standards and industry norms, with a product quality guarantee period of 1-3 years. During the guarantee period, if the cable has quality problems caused by non-human factors, such as aging of the insulation layer, damage to the sheath, breakage of the conductor, etc., the company will provide free repair or replacement services for the customer.
Technical Support
The company has a professional technical team to provide customers with comprehensive technical support. Customers can contact technical personnel at any time through phone calls, emails, online consultations, etc. when encountering any technical problems during the installation, laying and use of the cable. Technical personnel will promptly give detailed answers and professional guidance. For some complex technical problems, the company can arrange technical personnel to go to the site for guidance and assistance to ensure the installation quality and normal use of the cable.
Fault Handling
If the customer finds that the cable has faults during use, they should notify the company in a timely manner. After receiving the notification, the company will respond within 24 hours, arrange professional personnel to communicate with the customer, understand the specific situation of the fault, and analyze the causes according to the fault phenomenon to formulate solutions. For faults that need on-site handling, technical personnel will be arranged to rush to the site for repair or replacement as soon as possible to minimize the loss caused by cable faults to the customer.
Customer Feedback
The company attaches great importance to customers' feedback opinions and has set up various customer feedback channels, such as customer service phone calls, emails, online message boards, etc. Any problems encountered or suggestions put forward by customers during the use of the product can be fed back to the company through these channels. The company will arrange special personnel to sort out, analyze and handle customers' feedback, and reply to customers within a specified time. At the same time, the company will continuously improve product quality and service level according to customers' feedback to improve customer satisfaction.
In summary, the 500 Mcm, 300 Mcm and 250 Mcm specifications of copper core PE insulated Ttu 0.6kV cables have their own advantages in terms of specification parameters, characteristic uses, material styles and production processes, and can meet the needs of different low-voltage outdoor power distribution scenarios. At the same time, perfect services such as packaging, transportation, delivery, samples and after-sales provide customers with comprehensive guarantees, making them an ideal choice in low-voltage outdoor power distribution systems.
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