This series of copper core high-voltage cables covers two structural types: single core and three core. They use high-purity oxygen free copper conductors, XLPE cross-linked polyethylene insulation, flame-retardant polyvinyl chloride (PVC)/weather resistant polyethylene (PE)/low smoke halogen-free sheath, galvanized steel strip/steel wire armor, and strictly follow international and domestic authoritative standards such as GB/T 12706-2022, IEC 60502-2, GB/T 11017-2014. They have core advantages such as high rated voltage, low transmission loss, excellent insulation performance, strong mechanical strength, good anti-interference performance, good environmental resistance, and long service life. They can meet the power transmission needs of various scenarios such as medium and high voltage power grid distribution, industrial heavy-duty power supply, new energy grid connection, municipal high-voltage engineering, etc., and are suitable for various high-voltage transformers and distribution. Connection and transmission scenarios of cabinets and power supply equipment.
Product Parameter
|
Model |
YJV22-8.7/10kV copper core high-voltage cable (single core/three core, universal for power grid) |
YJV22-26/35kV copper core high-voltage cable (single core/three core, industrial heavy-duty version) |
YJV22-64/110kV Copper Core High Voltage Cable (Single Core/Three Core, Power Grid Engineering Payment) |
YJV32-26/35kV copper core high-voltage cable (single core/three core, mine specific) |
|
Rated voltage (U0/U) |
8.7/10kV |
26/35kV |
64/110kV |
26/35kV |
|
Conductor material |
High purity oxygen free copper (Cu ≥ 99.99%) |
High purity oxygen free copper (Cu ≥ 99.99%) |
High purity oxygen free copper (Cu ≥ 99.99%) |
High purity oxygen free copper (Cu ≥ 99.99%) |
|
conductor structure |
Stranded conductor (Class 2, Class 2 conductor) |
Tightly pressed twisted conductor (Class 2, Class 2 conductor) |
High density compressed twisted conductor (Class 2, Class 2 conductor) |
High density compressed twisted conductor (Class 2, Class 2 conductor) |
|
Conductor cross-section (mm ²) |
Single core: 50~400; Three core: 3 × 35~3 × 240 |
Single core: 70~630; Three core: 3 × 50~3 × 400 |
Single core: 120~1000; Three core: 3 × 120~3 × 800 |
Single core: 95~630; Three core: 3 × 70~3 × 400 |
|
insulating material |
XLPE cross-linked polyethylene |
XLPE cross-linked polyethylene |
High density XLPE cross-linked polyethylene |
Corrosion resistant XLPE cross-linked polyethylene |
|
Insulation thickness (mm) |
4.5~10.0 |
8.0~14.5 |
17.0~26.0 |
8.0~14.5 |
|
Sheath material |
PVC polyvinyl chloride (flame retardant) |
PE polyethylene (weather resistant) |
PE polyethylene (high-strength) |
PVC polyvinyl chloride (corrosion-resistant and flame-retardant) |
|
armor layer |
Galvanized steel strip armor (double-layer) |
Galvanized steel strip armor (double-layer) |
Galvanized steel wire armor (multi-layer) |
Galvanized steel wire armor (reinforced type) |
|
Cable outer diameter (mm) |
Single core: 25.8~58.6; Three core: 38.5~72.8 |
Single core: 32.5~76.8; Three core: 52.3~98.6 |
Single core: 58.2~115.6; Three core: 95.2~168.5 |
Single core: 38.6~82.5; Three core: 58.6~105.3 |
|
Reference weight (kg/km) |
Single core: 1250-4800; Three core: 1480~5260 |
Single core: 2100~8500; Three core: 2850~9880 |
Single core: 6800~25000; Three core: 10500~32600 |
Single core: 2500~9200; Three core: 3280~10500 |
|
Rated current carrying capacity (A, 25 ℃) |
Single core: 180~550; Three core: 135~420 |
Single core: 250~780; Three core: 180~580 |
Single core: 420~1200; Three core: 320-950 |
Single core: 280~820; Three core: 195~600 |
|
Operating Temperature |
The long-term allowable working temperature of the conductor is ≤ 90 ℃, and during short circuit, it is ≤ 250 ℃ (5s) |
The long-term allowable working temperature of the conductor is ≤ 90 ℃, and during short circuit, it is ≤ 250 ℃ (5s) |
The long-term allowable working temperature of the conductor is ≤ 90 ℃, and during short circuit, it is ≤ 250 ℃ (5s) |
The long-term allowable working temperature of the conductor is ≤ 90 ℃, and during short circuit, it is ≤ 250 ℃ (5s) |
|
ambient temperature |
-40 ℃~70 ℃ (laying and operation) |
-40 ℃~70 ℃ (laying and operation) |
-40 ℃~75 ℃ (laying and operation) |
-45 ℃~75 ℃ (laying and operation) |
|
laying method |
Direct burial, conduit installation, cable trench, bridge frame |
Directly buried, through pipes, cable trenches, cable trays, tunnels |
Direct burial, cable trench, cable tray, tunnel, overhead |
Direct burial, pipe penetration, mining tunnels, and port laying |
|
Flame retardant rating |
B-level (customizable A-level) |
B-level (customizable A-level) |
B-level (customizable A-level) |
A-level (mandatory flame retardant) |
Note: The above are standard parameters, and the conductor cross-section, insulation thickness, sheath material, and structural type (single core/three core) can be customized according to user needs; The rated current carrying capacity may fluctuate slightly due to the installation environment and heat dissipation conditions; Please refer to the physical object and inspection report for details.
Product feature and application
The conductor is made of high-purity oxygen free copper (Cu ≥ 99.99%), and the ultra-high voltage version uses special grade oxygen free copper (Cu ≥ 99.995%), with copper content far exceeding industry standards and conductivity at the international advanced level; The resistivity is ≤ 0.017241 Ω· mm ²/m, much lower than that of ordinary copper and aluminum conductors; Adopting high-density compression twisting technology, the conductor filling rate is high and the resistance is low, which can effectively reduce the power loss during high-voltage transmission, with a transmission efficiency of over 99.6%; Suitable for transmission in the full voltage range of 10kV~220kV, with a large current carrying capacity, it can meet the needs of high-power and high-voltage power transmission. Long term use can significantly reduce power transmission costs, which is in line with the concept of green and energy-saving development.
Dual structure flexible adaptation, covering all installation scenarios
Covering two major structural types: single core and three core, flexible selection can be made according to scene requirements: the three core structure adopts integrated twisted forming, without the need to lay multiple cables separately, with high construction efficiency and small space occupation, suitable for scenarios with limited laying space such as medium and high voltage distribution networks, industrial plants, municipal engineering, etc; Single core structure is suitable for ultra-high voltage (above 110kV), long-distance separate laying, and scenarios that require flexible phase separation. It has excellent bending performance and can adapt to complex laying paths; Both structures are suitable for various laying methods such as direct burial, pipe penetration, cable tray, tunnel, and overhead, covering the high-voltage transmission needs of all scenarios.
The insulation layer is made of high-quality XLPE cross-linked polyethylene material, and the ultra-high voltage version is made of ultra-high voltage special XLPE material. After high-temperature cross-linking treatment, it has excellent insulation performance, high voltage resistance, and temperature resistance; Accurate control of insulation thickness, insulation resistance ≥ 1000M Ω· km, breakdown voltage ≥ 35kV/mm, can effectively resist the risk of high-voltage electric field breakdown and ensure the safety of high-voltage transmission; XLPE material has strong chemical stability, is not easy to age, crack, or deform, and can operate stably in a high temperature environment of 90 ℃ for a long time. Its aging resistance far exceeds that of traditional insulation materials.
Equipped with double-layer galvanized steel strip/multi-layer galvanized steel wire armor layer, mining and ultra-high voltage models adopt reinforced/special steel wire armor, matched with high-strength sheath, forming a triple protection structure of "insulation layer+armor layer+sheath layer"; The tensile strength of the armor layer is ≥ 150MPa, the compressive strength is ≥ 200MPa, and the tensile strength of the ultra-high pressure version can reach over 250MPa. It can effectively resist external forces such as mechanical damage, compression, tension, and impact during installation and operation; Galvanized treatment has excellent anti rust and anti-corrosion properties, and can adapt to complex environments such as humidity, underground, and mining, extending the service life of cables.
It can be used in various scenarios.
1. Power grid backbone/distribution network scenario
Suitable for scenarios such as power grid backbone lines, distribution stations, substations, regional power supply centers, urban and rural power grid renovation, and ultra-high voltage transmission projects
2. Industrial heavy-duty scenarios
Suitable for heavy-duty scenarios such as large industrial plants, heavy-duty workshops, large production lines, industrial distribution stations, and heavy industry enterprises
3. Mining/Port Scene
Suitable for extreme scenarios such as mining, mining tunnels, port terminals, open-pit mines, port loading and unloading areas, etc
4. Municipal/architectural scenes
Suitable for municipal infrastructure, urban rail transit, high-rise buildings, large commercial complexes, urban underground pipe galleries and other scenarios
5. New energy scenarios
Suitable for scenarios such as photovoltaic power plants, wind power plants, energy storage power plants, and new energy grid connected projects
Production details
① Conductor: High purity oxygen free copper/special grade oxygen free copper is selected and processed through high-density compression and twisting technology. The surface of the conductor is smooth, the density is high, the conductivity is excellent, the resistance is low, and the loss is low; Accurate control of the twisting pitch ensures the stability of the conductor structure and avoids looseness and breakage during the laying process; The ultra-high voltage conductor adopts a high-density compression process, with a filling rate of over 95%, further reducing transmission losses.
②Insulation layer: Made of high-quality XLPE cross-linked polyethylene/ultra-high voltage special XLPE material, cross-linked at high temperature and continuously extruded into shape, with uniform insulation thickness, no bubbles or impurities, high insulation resistance, and high breakdown voltage; The insulation layer is tightly adhered to the conductor, effectively resisting the risk of high-voltage electric field breakdown and ensuring stable insulation performance; The ultra-high voltage insulation layer adopts a multi-layer composite structure to further enhance the voltage resistance performance.
③ Filling layer: Using flame-retardant polypropylene filling rope, the filling is uniform and tight, ensuring the symmetrical and stable structure of the three core conductor, and avoiding conductor displacement during the laying process; It has good flame retardant and buffering properties, which can reduce the damage to conductors and insulation layers caused by external impact forces.
④ Armor layer: Galvanized steel strip/wire is armored and formed by specialized equipment, with uniform and tight arrangement of steel strip/wire, and strong mechanical strength; The thickness of the galvanized layer meets the standard (≥ 80 μ m), with excellent rust and corrosion resistance, and can adapt to complex humid environments; The reinforced/specialized armor adopts multi-layer steel wire twisting, which greatly improves the impact resistance and tensile resistance performance.
⑤ Sheath layer: Made of flame-retardant PVC/weather resistant PE/low smoke halogen-free PE materials, extruded and formed, the thickness of the sheath is uniform, the surface is smooth, and it has good weather resistance, corrosion resistance, and flame retardancy; The sheath and armor layer are tightly adhered, effectively protecting the armor layer and internal structure, and extending the service life of the cable.
Product Certification
Copper core high-voltage cables rely on high-quality core materials, advanced production processes, strict quality control systems, and comprehensive testing processes. They have passed multiple international authoritative certifications and industry certifications, with complete qualifications and guaranteed quality
FAQ
Q: What is the difference between copper core high-voltage cables and aluminum core high-voltage cables? How to choose?
A: The core difference lies in material performance and usage scenarios: ① Conductivity: Copper core cables have low resistivity (≤ 0.017241 Ω· mm ²/m), low transmission loss, and high current carrying capacity; Aluminum core cables have high resistivity (≤ 0.0282 Ω· mm ²/m), high transmission loss, and low current carrying capacity; ② Mechanical properties: Copper core cables have excellent ductility and tensile strength, and are not easily broken or aged; Aluminum core cables have poor ductility and are prone to oxidation and loose joints after long-term use; ③ Service life: Copper core cables have a service life of ≥ 30 years, and aluminum core cables have a service life of ≤ 20 years; ④ Cost: Copper core cables have high material costs, while aluminum core cables have low costs. Selection suggestion: For scenarios with medium to high voltage, high power, long-distance transmission, and long-term operation (such as power grid backbone lines, industrial heavy loads, and new energy power stations), copper core high-voltage cables are preferred; Aluminum core cables can be selected for low voltage, short distance, temporary power supply, and cost sensitive scenarios.
Q: How to choose between single core and three core copper core high-voltage cables?
A: According to the voltage level, installation space, and transmission requirements, choose: ① Voltage level: 10kV~35kV medium voltage scenario, prioritize the three core structure for high installation efficiency and small space occupation; 110kV~220kV ultra-high voltage scenario, priority given to single core structure, suitable for ultra-high voltage transmission and long-distance laying; ② Laying space: Narrow spaces such as cable trenches, cable trays, underground pipe galleries, etc. Choose a three core structure, no need for multiple laying, saving space; Outdoor overhead, long-distance separate laying, single core structure, flexible bending, suitable for long-distance paths; ③ Transmission requirements: Three phase power supply, no need for phase separation scenarios (industrial plants, municipal engineering), choose a three core structure; Scenarios that require flexible phase separation and separate maintenance (ultra-high voltage transmission, phase separation power supply in distribution stations), with a single core structure.
Q: How to choose the rated voltage and conductor cross-section of copper core high-voltage cables?
A: ① Rated voltage selection: Based on the rated voltage of the power supply system, it is necessary to meet the requirement of "cable rated voltage U0/U ≥ system rated voltage" and adapt to the maximum working voltage of the system. For example, in a 10kV power grid system (maximum working voltage 12kV), select cables with U0/U=8.7/10kV; 35kV industrial system (maximum operating voltage 40.5kV), choose U0/U=26/35kV cable; Select cables with U0/U=127/220kV for the 220kV ultra-high voltage system. ② Conductor cross-section selection: determined based on the total load power, transmission distance, and allowable loss. The core formula is: conductor cross-section S (mm ²) ≥ (P × L)/(K × Δ U × U ²) (P is load power, L is transmission distance, K is copper conductor conductivity, Δ U is allowable voltage loss); At the same time, it is necessary to meet the current carrying capacity requirements, avoid overload heating, and additionally consider corona losses in ultra-high voltage scenarios. Example: A 35kV system with a load power of 5000kW, a transmission distance of 1km, and an allowable voltage loss of 5%. It is recommended to choose a 3 × 240mm ² (three core) or 240mm ² (single core) conductor cross-section.
Packing & Shipping
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