This series of three core high-voltage cables adopts high-purity oxygen free copper conductors, XLPE cross-linked polyethylene insulation, flame-retardant polyvinyl chloride (PVC) sheath/polyethylene (PE) sheath, galvanized steel strip/steel wire armor, strictly following international and domestic authoritative standards such as GB/T 12706-2022, IEC 60502-2, GB/T 11017-2014, etc. It has the core advantages of high rated voltage, low transmission loss, excellent insulation performance, strong mechanical strength, good anti-interference performance, good environmental resistance, and high laying efficiency. It can meet the power transmission needs of medium and high voltage power grid distribution, industrial heavy-duty power supply, municipal high-voltage engineering and other scenarios, and is suitable for the connection and transmission scenarios of various high-voltage power supply equipment and systems.
Product Parameter
|
Model |
YJV22-8.7/10kV Three core High Voltage Cable (Universal for Power Grid) |
YJV22-26/35kV three core high-voltage cable (industrial heavy-duty version) |
YJV22-64/110kV Three core High Voltage Cable (Grid Engineering Payment) |
YJV32-26/35kV Three core High Voltage Cable (Mine specific) |
|
Rated voltage (U0/U) |
8.7/10kV |
26/35kV |
64/110kV |
26/35kV |
|
Conductor material |
High purity oxygen free copper (Cu) |
High purity oxygen free copper (Cu) |
High purity oxygen free copper (Cu) |
High purity oxygen free copper (Cu) |
|
conductor structure |
Stranded conductor (Class 2, Class 2 conductor) |
Stranded conductor (Class 2, Class 2 conductor) |
Tightly pressed twisted conductor (Class 2, Class 2 conductor) |
Tightly pressed twisted conductor (Class 2, Class 2 conductor) |
|
Conductor cross-section (mm ²) |
3×35~3×240 |
3×50~3×400 |
3×120~3×800 |
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) |
38.5~72.8 |
52.3~98.6 |
95.2~168.5 |
58.6~105.3 |
|
Reference weight (kg/km) |
1480~5260 |
2850~9880 |
10500~32600 |
3280~10500 |
|
Rated current carrying capacity (A, 25 ℃) |
135~420 |
180~580 |
320~950 |
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, and sheath material 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
Adopting an integrated three core twisting process, the three conductors are synchronously twisted, insulated, and armored. Compared to traditional single core high-voltage cables, there is no need to lay three separate cables, greatly reducing the amount of laying work and construction time; The cable structure is compact and occupies little space, which can effectively save the laying space of cable trenches, cable trays, etc; The twisted structure has strong stability and is not easily twisted or broken during the laying process. It is suitable for various laying methods such as direct burial, pipe penetration, and cable tray, and the construction efficiency is improved by more than 50%.
High purity conductor material with extremely low transmission loss
The conductor is made of high-purity oxygen free copper material, with a copper content of ≥ 99.99%, excellent conductivity, and a much lower resistivity than ordinary copper conductors; Adopting the tight compression twisting process, the conductor density is high and the resistance is low, which can effectively reduce the power loss during high-voltage transmission, with a transmission efficiency of over 99.5%; Suitable for medium to high voltage transmission scenarios ranging from 10kV to 110kV, with a large current carrying capacity, it can meet the needs of high-power high-voltage power transmission, and long-term use can significantly reduce power transmission costs.
The insulation layer is made of high-quality XLPE cross-linked polyethylene material, which has excellent insulation performance, high voltage resistance, and temperature resistance after high-temperature cross-linking treatment; Accurate control of insulation thickness, high insulation resistance, high breakdown voltage, can effectively resist the risk of high-voltage electric field breakdown, ensuring the safety of high-voltage transmission; XLPE material has strong chemical stability, is not easy to age or crack, and can operate stably in a high temperature environment of 90 ℃ for a long time, with a service life of over 30 years.
Equipped with double-layer galvanized steel strip/multi-layer galvanized steel wire armor layer, combined with high-strength sheath, forming a triple protection structure of "insulation layer+armor layer+sheath layer"; The armor layer has extremely strong mechanical strength and impact resistance, which can effectively resist external forces such as mechanical damage, compression, and tension 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; The mining special version adopts reinforced steel wire armor, which can resist the severe impact and friction of mining tunnels.
The symmetrical design of the three core twisted structure can effectively counteract electromagnetic interference between conductors and reduce electromagnetic radiation and signal attenuation during high-voltage transmission; The insulation layer and armor layer form a good shielding effect, which can resist external electromagnetic interference and ensure the stable transmission of high-voltage electrical energy; Suitable for scenarios with high transmission stability requirements such as high-voltage power grids and industrial heavy loads, it can avoid power supply fluctuations and equipment failures caused by electromagnetic interference.
It can be used in various scenarios.
1. Commercial cluster scenario
Suitable for commercial scenarios such as large supermarkets, office buildings, hotels, and chain stores
2. Industrial basic scenarios
Suitable for industrial basic scenarios such as small and medium-sized factories, production lines, workshop assembly lines, etc
3. Construction Scene
Suitable for outdoor engineering construction, temporary construction sites, municipal construction and other scenarios
4. Medical/Data Scenarios
Suitable for scenarios such as hospitals, physical examination centers, data centers, testing institutions, etc
5. Overloading industrial scenarios
Suitable for heavy-duty workshops, large production lines, industrial refrigeration equipment and other heavy-duty scenarios
Production details
① Conductor: High purity oxygen free copper is selected and processed through compression and twisting technology. The surface of the conductor is smooth, with high density, excellent conductivity, low resistance, and low loss; Accurate control of the twisting pitch ensures the stability of the conductor structure and avoids looseness and breakage during the laying process.
② Insulation layer: High quality XLPE cross-linked polyethylene is used, which is cross-linked at high temperature and continuously extruded into shape. The insulation thickness is uniform, without bubbles or impurities, with high insulation resistance and 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.
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, with excellent rust and corrosion resistance, and can adapt to complex and humid environments; The reinforced 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 material, 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
Three core high-voltage cable relies on high-quality core materials, advanced production technology, strict quality control system, and comprehensive testing process. It has passed multiple international authoritative certifications and industry certifications, with complete qualifications and guaranteed quality
FAQ
Q: What is the difference between three core high-voltage cables and single core high-voltage cables? How to choose?
A: The core difference lies in the structure and laying efficiency: ① Structure: Three core cables are formed by integrated three core twisting, while single core cables are independently insulated and armored with a single conductor; ② Laying: Only one three core cable needs to be laid to meet three-phase power supply, with high construction efficiency and small space occupation; Three single core cables need to be laid, which requires a large amount of work and occupies a large space; ③ Anti interference: The three core twisted structure can counteract electromagnetic interference and has better anti-interference performance than single core cables; ④ Cost: The comprehensive laying and construction cost of three core cables is lower, while the cost of a single core cable is lower but the total project cost is higher. Selection suggestion: For scenarios such as medium and high voltage distribution networks, industrial plants, and municipal engineering that require three-phase power supply and limited installation space, priority should be given to three core high voltage cables; Single core high-voltage cables can be selected for scenarios involving ultra-high voltage (above 110kV), long-distance separate installation, and flexible phase separation.
Q: How to choose the rated voltage and conductor cross-section of a three core high-voltage cable?
A: ① Rated voltage selection: It is determined based on the rated voltage of the power supply system, and must meet the requirement of "cable rated voltage U0/U ≥ system rated voltage". For example, in a 10kV power grid system, select cables with U0/U=8.7/10kV; Select cables with U0/U=26/35kV for a 35kV industrial 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 conductivity, and Δ U is allowable voltage loss); At the same time, it is necessary to meet the current carrying capacity requirements and avoid overloading and heating. Example: A 35kV system with a load power of 5000kW, a transmission distance of 1km, an allowable voltage loss of 5%, and a recommended conductor cross-section of 3 × 240mm ².
Q: What should be paid attention to when laying three core high-voltage cables? Is there a requirement for bending radius?
A: Installation precautions: ① Before laying, check the appearance of the cable to ensure that the insulation layer and armor layer are not damaged or scratched. Test the insulation resistance to confirm that the insulation performance is normal; ② Avoid dragging, squeezing, or twisting cables during installation to prevent damage to the insulation and armor layers; ③ When directly buried, yellow sand and cover plates should be laid around the cable to avoid direct contact with gravel and sharp objects; ④ When laying through pipelines, the inner diameter of the pipeline should be ≥ 1.5 times the outer diameter of the cable to avoid friction and damage between the cable and the pipeline; ⑤ After laying, timely test the insulation performance and confirm that there are no abnormalities before wiring. Bending radius requirement: The bending radius of the cable should be ≥ 20 times the outer diameter of the cable (or ≥ 15 times for low-voltage sections) to avoid excessive bending that may cause insulation cracking and loose conductors.
Packing & Shipping
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