Product Overview

Key Features

1. Stainless steel tube optical fiber unit with central loose tube or layer stranding structure for maximum fiber protection
2. Aluminum alloy wire and aluminum clad steel wire armor for optimal mechanical and electrical performance balance
3. Anti-corrosive grease coating between layers for long-term environmental resistance
4. Supports heavy mechanical loads and long span installation (up to 500m+ span depending on configuration)
5. Mechanical and electrical properties adjustable by varying the proportion of steel and aluminum wires to match existing ground wire specifications
6. Can be manufactured to match the specification of existing ground wires, enabling direct replacement of aged ground wires without tower modification
7. Operating temperature range: -40 degC to +80 degC (short-term +200 degC during short-circuit events)
8. Fiber type: G.652D single-mode fiber (G.655 available on request)
9. Compatible with IEEE 1138, IEC 60794-4-20, and GB/T 7424.4 standards

OPGW Structure Types

Type I: Central Stainless Steel Tube (Center-Based)

1. Optical unit positioned at the center of the cable core
2. Stranded with a single layer of aluminum clad steel wire in spiral pattern
3. Smaller cable diameter and lighter weight
4. Lower short-circuit current capacity
5. Suitable for matching GJ-35 and GJ-70 ground wires
6. Best for lower voltage lines (110kV-220kV) with moderate short-circuit requirements

Type II: Stranded Stainless Steel Tube (Layer Stranding)

1. One or more aluminum clad steel wires on the non-central layer replaced with stainless steel tube optical units
2. Larger cable diameter accommodating more optical fibers
3. Higher tensile strength and short-circuit current capacity
4. Optimal balance between mechanical and electrical performance
5. Best for higher voltage lines (220kV-500kV) and long-span installations
6. Supports up to 144 fibers in multi-tube configurations

Technical Specifications

Standard OPGW Configurations

Optical Fiber Specifications

Mechanical and Environmental Parameters

Application Scenarios

1. Replacement of aged ground wires on existing high-voltage transmission lines (110kV-500kV) without tower modification
2. New transmission line construction requiring integrated grounding and communication infrastructure
3. Lightning protection and short-circuit current conduction on overhead power lines
4. Smart grid communication networks: SCADA, teleprotection, and wide-area monitoring systems (WAMS)
5. Dynamic Line Rating (DLR) and Dynamic Monitoring Systems (DMS) for real-time transmission capacity optimization
6. Power line carrier communication (PLCC) backup or replacement with higher bandwidth fiber optic channel
7. Observation and monitoring systems for overhead test lines and maintenance data information systems
8. Inter-substation communication links along transmission corridors
9. Distribution automation and feeder automation communication channels

Standards and Certifications

Installation and Packaging

Installation Guidelines

1. OPGW is installed on the topmost position of transmission towers, replacing or serving as the ground wire
2. Installation method: stringing with tensioner and puller (avoid loose laying to prevent fiber damage)
3. Maximum pulling tension during installation should not exceed 20% of RTS
4. Use anti-twisting devices to prevent cable rotation during stringing
5. Sag tension calculations must account for wind load, ice load, and temperature variations per IEEE 1138
6. Joint boxes should be installed at tower positions with adequate climbing space
7. Minimum clearance to phase conductors must be maintained per local electrical safety regulations