What Are the Key Specifications of OPGW Cable? Core Count, Wavelength & Attenuation Explained

Understanding the key specifications of OPGW cable—such as core count, transmission wavelength, and maximum attenuation coefficient—is crucial for power grid reliability and data transmission efficiency. As a leading manufacturer, Hebei Yongben Wire and Cable Co., Ltd. provides high-performance OPGW cables with customizable fiber counts, optimized wavelengths, and low attenuation to meet global standards. Whether you're an operator, evaluator, or researcher, this guide will help you select the right OPGW solution for your project.

1. Definition & Technical Performance of OPGW Cables

Optical Ground Wire (OPGW) cables are dual-function conductors that serve as overhead ground wires for electrical transmission lines while housing optical fibers for data communication. The three critical specifications—core count, transmission wavelength, and attenuation coefficient—determine their performance in power grids. Core count refers to the number of optical fibers within the cable, typically ranging from 12 to 144 strands, with Hebei Yongben offering customizable configurations up to 288 fibers for high-capacity networks. Transmission wavelength is measured in nanometers (nm), with 1310nm and 1550nm being industry standards for long-distance communication. Attenuation coefficient, expressed in dB/km, measures signal loss over distance, where premium OPGW cables like ours achieve ≤0.36 dB/km at 1550nm, exceeding IEEE 1138 and IEC 60794 standards.

2. Application Scenarios & Market Overview

OPGW cables are indispensable in smart grid deployments, spanning urban power distribution, renewable energy farms, and cross-border transmission projects. Their ability to withstand lightning strikes (up to 200kA) while providing 100Gbps+ data throughput makes them ideal for harsh environments. The global OPGW market, valued at $2.1 billion in 2023, grows at 6.8% CAGR, driven by grid modernization initiatives like China's Ultra-High Voltage (UHV) projects. For coastal areas requiring corrosion-resistant solutions, pairing OPGW with 250 MCM Sneezewort AAC All Aluminum Stranded Conductor creates a durable overhead line system. Our cables are certified across 28 European countries, with customized designs for desert (high-temperature) and polar (low-temperature) applications.

3. Comparison Analysis: OPGW vs. Alternative Solutions

OPGW outperforms All-Dielectric Self-Supporting (ADSS) and Optical Phase Conductor (OPPC) cables in high-voltage scenarios (>110kV) due to its dual grounding-communication function. For medium-voltage lines, AAC conductors like our 250 MCM Sneezewort offer cost-effective mechanical support when paired with OPGW.

4. Procurement Guide: Key Selection Criteria

When specifying OPGW cables, consider these technical parameters aligned with IEC 60794-4-10:

• Core Count: 24-48 fibers suit most utilities; 96+ fibers for backbone networks
• Wavelength: 1550nm for distances >80km (lower attenuation); 1310nm for <80km
• Attenuation: ≤0.36 dB/km (single-mode G.652.D fiber recommended)
• Temperature Range: -40°C to +80°C for standard cables; -60°C to +150°C available
• Short-Circuit Current: ≥15kA for 1-second duration (IEC 60909)

Hebei Yongben provides third-party tested samples with complete documentation including OTDR traces and mechanical test reports.

5. Why Choose Hebei Yongben for OPGW Solutions?

With ISO 9001 and CCC certifications, our OPGW cables feature:

• Zero defective fibers per IEC 60793-1-40 testing
• Custom stranding designs to match existing line configurations
• Anti-vibration solutions for wind-prone areas
• 15-year performance warranty with 0.005 dB/km/year aging guarantee

Contact our engineering team for free project consultation and lightning protection calculations. Explore our complementary 250 MCM Sneezewort AAC Conductor for complete overhead line solutions.