Aluminum Alloy Power Cable

Product Model Naming Rules

The letter "L" in the model designates an aluminum alloy conductor:
- YJ: Cross-linked polyethylene insulation.
- V: PVC sheath.
- H: Aluminum alloy conductor.
- L: Aluminum (conductor material identifier).
- 22: Steel tape armoring (double steel tape).
- 32: Fine steel wire armoring.
- 62: Aluminum alloy interlocking armor.

Common Models:

Product Structure

1. Conductor: AA8030 series aluminum alloy (containing iron, copper, silicon, magnesium, rare earth). Manufactured by continuous casting and rolling of aluminum alloy rods, then drawing and annealing, twisted into a compact structure with a fill factor above 95% — far higher than ordinary copper cables (80%), effectively reducing cable outer diameter.

2. Insulation: 90°C cross-linked polyethylene (XLPE), converted to a thermoset material via silane or peroxide cross-linking, significantly improving heat resistance, aging resistance, and service life. Does not release corrosive or toxic gases when burning. Medium-voltage models include conductor shielding and insulation shielding layers (triple extrusion).

3. Armoring (optional):
   - Double steel tape armoring (22): High-strength; withstands significant pressure; suitable for direct burial.
   - Aluminum alloy interlocking armoring (62/HS): Self-locking structure; resists external forces; lightweight; flexible; corrosion-resistant; prevents insect and rodent damage; high flame-retardant grade.
   - Steel wire armoring (32/33): High tensile strength; suitable for vertical installation.

4. Sheath: Eco-friendly PVC or LSZH material with good corrosion resistance and flame retardancy. Flame-retardant grades available: ZA/ZB/ZC.

Technical Parameters

Voltage Ratings: 0.6/1kV, 3.6/6kV, 6/10kV, 8.7/15kV, 12/20kV, 18/30kV, 21/35kV, 26/35kV.

Cross-section Range: 10 to 1000 mm².

Working Temperature:
- Max long-term: 90°C (XLPE insulation).
- Max short-circuit (<=5s): 250°C.
- Min operating temperature: -40°C.
- Laying temperature: >= 0°C.

Bending Radius:
- Interlocking armored: 7D (D = outer diameter).
- Multi-core steel tape armored: 12D.
- Single-core steel tape armored: 15D.
- Unarmored: 15 to 20D.

Electrical and Mechanical Performance Comparison:

Main Performance Advantages

1. Conductivity: 61.5% IACS. For the same ampacity, aluminum alloy requires 1.5x the cross-section but weighs only half.
2. Creep Resistance: 3x ordinary aluminum, equivalent to copper. Ensures long-term stability of electrical connections.
3. Corrosion Resistance: Aluminum forms a thin, firm oxide layer on contact with air. Rare earth additions further improve electrochemical corrosion resistance.
4. Flexibility: 30% more flexible than copper; spring-back 40% lower than copper. Minimum bending radius is 7x cable diameter.
5. Environmental Performance: Significantly lower carbon emissions than copper during production. Insulation and sheath use eco-friendly materials.

VI. Application Scenarios

1. Building Engineering: High-rise residential shafts, commercial complex floor distribution, large venues.
2. Renewable Energy: Wind power tower fixed installations (60%+ of wind cable costs); photovoltaic AC-side grid-connection cables; energy storage systems.
3. Infrastructure: Metro tunnels (fire-resistant models withstand 950°C); airport terminals; historic building renovations (min 7x diameter bending radius).
4. Industrial: Petroleum/chemical (acid/alkali resistant; UL1685 vertical flame test); mining (service life up to 30 years); shipbuilding (passes 5000-hour salt spray test).
5. Power Systems: Distribution networks or industrial installations with rated voltages up to 35kV.

Implementation Standards

Note: Per GB 50217-2018 Power Engineering Cable Design Standard, cables with voltage above 1kV should not use aluminum alloy conductors. Careful evaluation is required when voltage exceeds 1kV.

Installation Notes

1. Connectors: Must use dedicated copper-aluminum transition terminals. Apply lubricating oil or anti-oxidant compound to prevent electrochemical corrosion in moist environments.
2. Minimum bending radius: 7x outer diameter.
3. Armoring selection: Steel tape armoring for pressure resistance; aluminum alloy interlocking armoring for lightweight and pest resistance.
4. Laying temperature: >= 0°C.