OPGW (Optical Fiber Composite Overhead Ground Wire)

1. Product definition and function

OPGW is a specialized optical cable that integrates optical fiber units into an overhead ground wire, combining the lightning protection function of traditional ground wires with optical fiber communication capabilities. It is primarily used for the construction of communication networks on high-voltage transmission lines

2. Core parameters

Structural parameters

Number of fiber cores: 12/16/24/36/48/72/96 cores (common configurations)

Fiber type: G.652 (standard single mode) or G.655 (dispersion-shifted single mode)

Light unit structure: stainless steel tube (seamless design, filled with fiber paste for protection) or aluminum tube

Metal conductor: Aluminum-clad steel (AS), aluminum alloy (AA), or hybrid structure

3

Mechanical properties: Outer diameter: 10.5mm～15.0mm (varies by model and according to customer requirements)

Mass per unit length: 320kg/km to 475kg/km (subject to customer requirements)

Rated tensile strength (RTS): 42.9kN~80kN (according to customer requirements)

Maximum Allowable Installation Tension (MAT): Typically 40% of RTS (as per customer requirements)

Minimum bending radius: dynamic 300mm (20 times the outer diameter) (as per customer requirements)

Electrical performance

DC resistance (20℃): 0.449Ω/km to 0.645Ω/km (subject to customer requirements)

Short-circuit current capacity: 36.5kA²·s to 76.4kA²·s (40℃ to 200℃) (as per customer requirements)

Maximum allowable temperature: instantaneous 200℃, continuous 80℃ (subject to customer requirements)

4. Optical performance

Attenuation coefficient (1550nm): ≤0.21dB/km

5. Application Scenario

Communication backbone network of transmission lines (35kV~1000kV)

Scenarios that require both lightning protection and grounding as well as optical fiber communication