64/110kV Power Cables

Power cables are core components for efficient, stable energy transmission in power systems, widely applied in power grids, industrial power distribution, urban infrastructure, and large-scale engineering projects. Below is a detailed breakdown of their key attributes, specifications, and performance features:

1. Core Product Categories

Based on voltage levels, application scenarios, and structural designs, our power cables are mainly classified into three series:

- Low-Voltage Power Cables (0.6/1kV)

Designed for low-voltage power distribution systems (e.g., residential communities, commercial buildings, small factories).

• Conductor Material: High-purity oxygen-free copper (Cu) or aluminum (Al); copper conductors are preferred for better electrical conductivity and corrosion resistance, suitable for high-demand scenarios.

• Insulation Layer: Made of cross-linked polyethylene (XLPE) or polyvinyl chloride (PVC). XLPE offers excellent heat resistance (long-term operating temperature up to 90℃) and aging resistance, while PVC is cost-effective for general indoor environments.

• Typical Models: VV (PVC-insulated, PVC-sheathed), YJV (XLPE-insulated, PVC-sheathed); common conductor cross-sections range from 1.5mm² to 240mm².

- Medium-Voltage Power Cables (3.6/6kV to 26/35kV)

Used in medium-voltage power transmission (e.g., industrial parks, substation connections, urban power grids).

• Structural Features: Equipped with a semi-conductive shielding layer (inner and outer) to eliminate electric field concentration, and a metal shielding layer (copper tape or copper wire) for grounding and anti-interference.

• Insulation Performance: XLPE insulation with high dielectric strength, ensuring safe operation under medium voltage; meets IEC 60502-2 or GB/T 12706.2 standards.

• Application Scenarios: Underground laying, cable trench installation, or direct burial (with anti-corrosion sheath for harsh soil conditions).

- High-Voltage Power Cables (64/110kV and above)

Critical for long-distance, high-capacity energy transmission (e.g., inter-city power grids, renewable energy bases like wind/solar farms).

• Advanced Structure: Adopts "insulation-screening-sheathing" integrated design; insulation layer is thickened XLPE (with impurity control to <0.1μm) for ultra-low dielectric loss.

• Special Protections: Armored with steel tape or steel wire to resist mechanical impact (suitable for high-altitude or mountainous laying); outer sheath uses polyethylene (PE) or polypropylene (PP) for UV resistance and weatherability.

• Performance Indicators: Long-term operating temperature ≤90℃, short-circuit temperature ≤250℃ (for 1 second); partial discharge quantity <10pC at rated voltage, ensuring ultra-reliable transmission.

2. Key Performance Advantages

• Superior Conductivity: Copper conductors with purity ≥99.95%, ensuring low resistance (≤0.017241Ω·mm²/m at 20℃) and minimal energy loss during transmission.

• Strong Environmental Adaptability:

• Fire-resistant type (ZR-YJV): Passes GB/T 19666 standard, maintaining circuit integrity for 90 minutes at 750-800℃.

• Anti-corrosion type: Suitable for coastal areas (resistant to salt spray) and chemical plants (resistant to acid/alkali), with service life up to 30 years.

• High Safety: Complies with international safety standards (e.g., UL 44, IEC 60502); no toxic gas release during combustion (for halogen-free low-smoke models, LSZH sheath).

3. Customization & Quality Assurance

• Customizable Options: We offer tailored solutions for special needs, such as:

• Special conductor cross-sections (up to 2500mm² for high-current scenarios).

• Low-temperature resistant cables (operable at -40℃ for cold regions like northern China).

• Flame-retardant grade adjustment (from ZR (general flame-retardant) to ZA (flame-retardant A class)).

• Strict Quality Testing: Every batch undergoes 12+ tests, including:

• Electrical tests: DC resistance, insulation resistance, voltage withstand test.

• Mechanical tests: Tensile strength, elongation at break of sheath.

• Environmental tests: Thermal aging, cold bending, and salt spray resistance.

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