Product Description
Our factory's cable buried in the ground products are equipped with a special metal sheath and armor layer, providing high voltage carrying capacity and multiple safety protections. Different models can be selected according to the actual scenario to ensure stable operation in humid, corrosive, high-temperature, or low-temperature environments. Some models even possess flame-retardant, fire-resistant, waterproof, and rodent-proof properties.
Product Model
|
Model |
Features |
Applicable voltage |
|
YJV |
Copper core, cross-linked polyethylene insulation, PVC sheath |
0.6/1kV ~ 26/35kV |
|
YJV22 |
YJV + steel tape armor |
0.6/1kV ~ 26/35kV |
|
YJV32 |
YJV + fine steel wire armor |
8.7/10kV ~ 35kV |
|
YJLV |
Aluminum core, cross-linked polyethylene insulation |
8.7/10kV ~ 35kV |
|
ZR-YJLV22 |
Flame-retardant aluminum core armored cable |
≤35kV |
|
500kV XLPE |
Ultra-high voltage cross-linked polyethylene insulation system |
500kV |
Product Feature And Application
Power Industry: Main Transmission and New Energy Grid Connection
Used for power transmission between power plants and substations; Supports centralized grid connection of wind and solar power plants, solving the problem of long-distance transmission of new energy; Replaces traditional overhead lines in urban underground power grids, improving power supply reliability.
Transportation System: Rail Transit and Electric Vehicle Power Supply
High-voltage cables are widely used in the traction power supply systems of subways, light rail, and high-speed rail; Electric trains and electric vehicles rely on high-voltage cables for power transmission between their motors and controllers.
Industrial Sector: Power Supply for Large Equipment
High-power equipment in industries such as metallurgy, mining, and chemicals requires high-voltage cables to provide a stable power supply; Mining rubber-sheathed flexible cables are suitable for frequent equipment movement, possessing flexibility and flame-retardant properties.
Buildings and Infrastructure
High-voltage cables are used in high-rise buildings, airports, shopping malls, and other large public facilities to achieve efficient power distribution; Cable tunnel installation facilitates maintenance, and flame-retardant/fire-resistant types can be selected when high fire protection requirements are required.
Special Engineering and Cutting-Edge Technologies:
Submarine cables are used for cross-river and cross-sea power transmission, such as offshore wind power grid connection projects; Superconducting cables (cooled by liquid nitrogen) have been piloted in some areas, increasing transmission capacity by more than 5 times with extremely low loss.
Product Technical Parameters
Direct Burial:
Cables are directly buried in underground trenches, backfilled with soil, and marked with stakes. This method is simple to construct, low in cost, and provides good heat dissipation. It is suitable for areas with non-corrosive soil and where frequent excavation is not required.
Cable Trench Laying:
Enclosed trenches with supports are constructed underground. Cables are fixed to the supports, facilitating maintenance and capacity expansion. Suitable for industrial areas or substation outgoing lines with a large number of cables.
Dual-Pipe Laying:
Cables are run through PVC or concrete pipes and then buried underground. This effectively prevents mechanical damage and external interference. Suitable for areas susceptible to external forces, such as driveways and intersections.
Cable Tunnel Laying:
Multi-circuit cables are centrally laid in large underground tunnels, equipped with ventilation, drainage, and monitoring systems. Suitable for urban core areas or important power supply nodes.
FAQ
Q: What is the acceptable grounding resistance for high-voltage cables?
A: The acceptable grounding resistance for high-voltage cables depends on the system type, voltage level, and grounding method. Generally, it should not exceed 4Ω, but under specific conditions, this can be relaxed to 10Ω or lower. The specific standards for different scenarios are as follows:
For systems with large grounding short-circuit currents, the grounding resistance should meet the following requirement: R ≤ 2000/I. When I > 4000A, R ≤ 0.5Ω.
For systems with small grounding short-circuit currents, for shared grounding devices: R ≤ 120/I and ≤ 4Ω. For independent grounding devices: R ≤ 250/I and ≤ 10Ω.
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