Optical Fiber Composite Overhead Ground Wire (OPGW - Layer-Stranded)

Optical Fiber Composite Overhead Ground Wire (OPGW) is an overhead ground wire containing optical fibers, offering multiple functions such as overhead grounding 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 existing ground wires in old overhead high-voltage transmission systems, adding optical communication lines, conducting short-circuit current, and providing lightning protection. Special structures can be customized per customer requirements.

Core Product Features

Flexible cable diameter design supporting large fiber count configurations
Stable and reliable structure achieving an optimal balance of mechanical and electrical performance
High tensile strength and large short-circuit current capacity, suitable for complex operating conditions
Optimized stranding design provides secondary fiber excess length
Stranding layers support two- or three-layer designs to suit different requirements
Single-wire materials can be combined from aluminum-clad steel wire, aluminum alloy wire, and aluminum wire

Structural Parameters

Fiber: supports G652D/G655 and other types;
Fiber count range: 2-144 fibers
Protection tube: stainless steel;
Diameter: 1.5-6 mm
Stranded single wires: aluminum-clad steel / aluminum alloy / aluminum rod;
Diameter: 1.5-6 mm
Max. outer diameter: 30 mm;
Max. cross-section: 500 mm²

Mechanical Performance

Standard: DL/T 832-2016
Max. tensile strength (RTS): 700 kN;
Max. crush load: 3000 N/100 mm
Max. short-circuit current capacity: 2000 kA²·s (40℃~200℃)
Min. bending radius: dynamic 20D;
static 15D (D is the OPGW cable diameter)

Environmental Performance

Installation temperature range: -10℃ to +50℃
Operating and storage temperature range: -40℃ to +65℃

Fiber Characteristics

Fiber Type	Fiber Attenuation (dB/km) @850 nm	Fiber Attenuation (dB/km) @1300 nm	Fiber Attenuation (dB/km) @1310 nm	Fiber Attenuation (dB/km) @1550 nm	Bandwidth (MHz·km) @850 nm	Bandwidth (MHz·km) @1300 nm	Polarization Mode Dispersion (ps/km), single fiber	Polarization Mode Dispersion (ps/km), link value (M=20, Q=0.01%)
G652D	—	—	≤0.35	≤0.21	—	—	≤0.20	≤0.10
G655	—	—	—	≤0.22	—	—	≤0.20	≤0.10
50/125μm	≤3.0	≤1.0	—	—	≥600	≥1200	—	—
62.5/125μm	≤3.5	≤1.0	—	—	≥200	≥600	—	—

Specific Models and Technical Parameters

Model	Cable Structure	Max. Fiber Count (cores)	Aluminum-Clad Steel Cross-Section (mm²)	Outer Diameter (mm)	Mass per Unit Length (kg/km)	Rated Breaking Load (kN)	DC Resistance at 20℃ (Ω/km)	Allowable Short-Circuit Current Capacity (kA²·s)
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
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
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
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
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
OPGW-24B1.3-110-[140;68]	1/2.8/20AS＋5/2.7/20AS＋11/3.05/20AS, optical unit 1/2.6	24	≈110	14.3	≤791	≥140	≤0.80	≥68
OPGW-24B1.3-110-[67;95]	1/2.9/20AS＋5/2.8/20AS＋12/2.8/AA, optical unit 1/2.7	24	≈37（AA≈74）	14.1	≤473	≥67	≤0.40	≥95
OPGW-36B1.3-120-[145;73]	1/3.0/20AS＋5/2.9/20AS＋12/2.9/20AS, optical unit 1/2.8	36	≈120	14.6	≤820	≥145	≤0.77	≥73
OPGW-36B1.3-120-[95;98]	1/3.0/30AS＋5/2.9/30AS＋12/2.9/30AS, optical unit 1/2.8	36	≈120	14.6	≤700	≥95	≤0.55	≥98
OPGW-36B1.3-120-[74;110]	1/3.0/40AS＋5/2.9/40AS＋12/2.9/40AS, optical unit 1/2.8	36	≈120	14.6	≤582	≥74	≤0.42	≥110

Note: Other fiber counts, fiber types, and stranding types can be customized as required. The table above shows only some models; complete model parameters are available on request.

Mechanical and Environmental Performance Test Standards

Test Item	Test Method	Acceptance Criteria
Tensile	GB/T 7424.2-E1	40% RTS: no significant fiber strain (≤0.01%) and no significant additional attenuation (≤0.03 dB); 60% RTS: fiber strain ≤0.25%, additional attenuation ≤0.05 dB; residual additional attenuation ≤0.03 dB after load removal
Crush	GB/T 7424.2-E3	After the test, additional attenuation of the single-mode fiber at 1550 nm ≤0.05 dB per fiber; the OPGW shall show no mechanical damage
Water Penetration	GB/T 7424.2-F5	Sample length 0.5 m, water head 1 m, duration 1 hour; no water penetration
Temperature Cycling	GB/T 7424.2-F1	Sample length ≥500 m; 2 cycles from -40℃ to +70℃ with soak time ≥12 h each; after the test, additional attenuation of the single-mode fiber at 1550 nm ≤0.1 dB

Packaging and Delivery Requirements

Packaging: standard drums
Delivery length: standard 2/3 km, customizable per customer requirements

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