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OPGW — Optical Fiber Composite Overhead Ground Wire
A dual-purpose cable combining grounding and communication for high-voltage transmission and wind-solar-storage stations.
OPGW (Optical Fiber Composite Overhead Ground Wire) is a type of overhead ground wire containing optical fibers. It integrates multiple functions such as overhead ground wire and optical communication. It is mainly used in communication lines of 110kV, 220kV, 500kV, 750kV and newly-built overhead high-voltage transmission systems. It can also be used to replace the existing ground wires of old overhead high-voltage transmission systems, add optical communication lines, conduct short-circuit current and provide lightning protection. Special structures can be customized according to user requirements.
Key features
- Larger cable diameter, enabling the design of large fiber core counts
- Stable structure and high reliability
- High tensile strength and large short-circuit current capacity, achieving the optimal balance between mechanical and electrical properties
- Optimized stranding design to obtain secondary fiber excess length
- The number of stranded wire layers can be designed as two or three layers
- The single wires can be a combination of aluminum-clad steel wires and/or aluminum alloy wires, and aluminum wires
Core function
Dual integrationCombines the physical protection of a traditional overhead ground wire with the data-transmission capability of a communication cable — one cable, less resource occupancy.
Core advantages
Lightning protectionConducts lightning currents and protects high-voltage transmission lines.Mechanical strengthTransmission-grade tensile, wind, and ice/snow resistance for harsh outdoor conditions.Service lifeDesigned for the same lifecycle as power lines — maintenance-free, lowering operating cost.
Typical applications
TransmissionPhotovoltaic high-voltage transmission lines.Integrated stationsBackbone communication for wind-solar-storage integrated power stations, internal and external.
Structure
Optical FiberMaterial: G652D / G655, etc. — 2~144 CoreProtection TubeMaterial: Stainless Steel Tube — 1.5~6mmStranded WiresMaterial: Aluminum-clad Steel / Aluminum Alloy / Aluminum Rod — 1.5~6mmMaximum Outer Diameter30mmMaximum Cross-sectional Area500mm²
Mechanical Properties
StandardCompliant with DL/T 832-2016Rated Tensile Strength (RTS)700 kNMaximum Crushing Force3000 N/100mmMax. Short-circuit Current Capacity (40°C–200°C)2000 kA²sMin. Bending Radius (Dynamic)20DMin. Bending Radius (Static)15D
Environmental Performance
Installation Temperature Range−10°C ~ +50°COperation & Storage Temperature Range−40°C ~ +65°C
Optical Fiber Performance
| Fiber type | Attenuation @850nm | @1300nm | @1310nm | @1550nm | Bandwidth @850nm | @1300nm | PMD — single fiber | PMD — link value (M=20, Q=0.01%) |
|---|---|---|---|---|---|---|---|---|
| G652D | — | — | ≤0.35 dB/km | ≤0.21 dB/km | — | — | ≤0.20 ps/km | ≤0.1 ps/km |
| G655 | — | — | — | ≤0.22 dB/km | — | — | ≤0.20 ps/km | ≤0.1 ps/km |
| 50/125 μm | ≤3.0 dB/km | ≤1.0 dB/km | — | — | ≥600 MHz·km | ≥1200 MHz·km | — | — |
| 62.5/125 μm | ≤3.5 dB/km | ≤1.0 dB/km | — | — | ≥200 MHz·km | ≥600 MHz·km | — | — |
Reference Product Models — Technical Parameters
| SL.NO | Product Model | Optical Cable Structure Type | Max. Fibers (cores) | Al-clad Steel Cross-section (mm²) | Outer Diameter (mm) | Mass per Unit Length (kg/km) | RTS (kN) | DC Resistance @20°C (Ω/km) | Allowable Short-circuit Current Capacity (40–200°C, kA²s) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | OPGW-48B1.3-90-[112;45] | 1/2.6/20AS + 4/2.5/20AS + 11/2.8/20AS, optical unit 2/2.5 | 48 | ≈90 | 13.2 | ≤641 | ≥112 | ≤0.98 | ≥45 |
| 2 | OPGW-48B1.3-90-[57;67] | 1/2.6/40AS + 4/2.5/40AS + 11/2.8/40AS, optical unit 2/2.5 | 48 | ≈90 | 13.2 | ≤457 | ≥57 | ≤0.52 | ≥67 |
| 3 | OPGW-24B1.3-100-[118;50] | 1/2.6/20AS + 5/2.5/20AS + 11/2.8/20AS, optical unit 1/2.5 | 24 | ≈100 | 13.2 | ≤674 | ≥118 | ≤0.93 | ≥50 |
| 4 | OPGW-24B1.3-100-[60;74] | 1/2.6/40AS + 5/2.5/40AS + 11/2.8/40AS, optical unit 1/2.5 | 24 | ≈100 | 13.2 | ≤479 | ≥60 | ≤0.49 | ≥74 |
| 5 | OPGW-24B1.3-110-[133;63] | 1/2.6/20AS + 5/2.5/20AS + 10/3.2/20AS, optical unit 1/2.5 | 24 | ≈110 | 14 | ≤760 | ≥133 | ≤0.83 | ≥63 |
| ... | ... | ... |
Illustrative models from the datasheet — full range available on request.
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