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0.66/1.14kV Mining Power Cable 3+1 Core Rubber Sheathed Flexible
1.14kV mining power cable
,mining power cable
,70mm mining wire
1. Product Construction & Design
This 4-core (3 power + 1 ground) rubber-sheathed flexible mining cable is purpose-built for underground coal mining mobile equipment. Its cross-section shows a 3+1 balanced core design, with three large power conductors and one smaller ground conductor, wrapped in color-coded rubber insulation (red, green, yellow, black) and encased in a heavy-duty black rubber sheath. The stranded copper conductors offer superior flexibility, while the compact stranding ensures uniform stress distribution during repeated bending and dragging in mine tunnels.
| Parameter | Specification |
|---|---|
| Rated Voltage | 0.66/1.14kV |
| Core Configuration | 3×Main + 1×Ground |
| Conductor Material | Annealed Stranded Copper |
| DC Resistance (20°C) | ≤4.61 Ω/km (for 4mm² main cores) |
| Insulation Resistance | ≥100 MΩ·km |
| Operating Temperature | -25°C to +65°C (continuous) |
| Minimum Bending Radius | Static: 6×D; Dynamic: 8×D |
| Flame Retardancy | IEC 60332-3 Class B (Self-extinguishing) |
| Certification | MA (Coal Mine Safety Mark), ISO9001 |
3. Key Performance & Mining Advantages
✅ Built for Underground Toughness
- Mechanical Durability: Resists abrasion from coal/rock surfaces, impact from falling debris, and compression under heavy machinery.
- Flexibility: Multi-strand copper and high-elongation rubber materials allow repeated bending without cracking, ideal for moving equipment like shearers and loaders.
- Flame Safety: Halogen-free flame retardant materials ensure the cable self-extinguishes, preventing fire spread in methane-rich environments.
✅ Electrical & Environmental Stability
- Low Power Loss: High-purity copper conductors maintain low resistance, minimizing voltage drop and heat buildup during continuous operation.
- Moisture & Chemical Resistance: The rubber insulation and sheath block water ingress and resist mine water, hydraulic oils, and corrosive dust.
- Long Service Life: UV-stabilized rubber materials resist aging, even in damp, high-temperature mine tunnels.
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