Optical Fiber Composite Overhead Ground Wire (OPGW)
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Product Description: OPGW optical cables place optical fibers within the ground wire of overhead high-voltage transmission lines, creating a fiber-optic communication network along the transmission line. This structural design combines the dual functions of a ground wire and communication capability.
Scope of Application:
OPGW optical cables are primarily used on 500kV, 220kV, and 110kV transmission lines. Due to factors such as line outages and safety concerns, they are often deployed in newly constructed lines.
The applicable features of OPGW are:
Lines with voltages exceeding 110kV have relatively large spans (typically over 250 meters);
Easy to maintain and well-suited for resolving line-spanning issues, its mechanical properties can easily accommodate large-span lines.
OPGW's outer layer is made of metal armor, which has no impact on high-voltage electrical erosion or degradation.
OPGW must be installed with the power shut off, which results in significant power outages and associated losses. Therefore, OPGW should be used in newly constructed high-voltage transmission lines of 110kV and above.
In the performance specifications of OPGW, the greater the short-circuit current, the more a highly conductive material is required for the armor layer, which in turn reduces tensile strength. Conversely, if the tensile strength is to be maintained, increasing the short-circuit current capacity can only be achieved by enlarging the metal cross-sectional area, inevitably leading to an increase in cable diameter and weight. This, in turn, poses safety concerns regarding the structural integrity of transmission line towers.
Product features:
Characteristics of Layer-Stranded OPGW
· Structurally stable and highly reliable;
· Can obtain secondary excess length;
· Highly resistant to torsion and lateral pressure;
· Capable of withstanding high mechanical strength and easily achieving a large short-circuit current capacity.
Applications:
Typically used in the construction of new overhead power lines
It can meet the requirements of large-core-count, ultra-high-voltage transmission lines.
Used for conducting large fault short-circuit currents and providing lightning protection.
Features of Central Tube-type OPGW
· Small cable diameter, lightweight, and minimal additional load on the tower;
· The steel pipe is located at the center of the cable and does not cause secondary mechanical fatigue damage;
· Low resistance to lateral pressure, torsion, and tensile forces (single layer).
Applications:
Replace the existing ground wire for upgrading old lines.
Suitable for low-grade lines,配套 with lines such as GJ-50/70/90
Product Inquiry
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Address: No. 2999, Donghang Road, Lusong District, Zhuzhou City, Hunan Province, China
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