Product Description:
optical ground wire (also known as an OPGW or, in the IEEE standard, an optical fiber composite overhead ground wire) is a type of cable that is used in overhead power lines. Such cable combines the functions of grounding and telecommunications. An OPGW cable contains a tubular structure with one or more optical fibers in it, surrounded by layers of steel and aluminum wire. The OPGW cable is run between the tops of high-voltage electricity pylons. The conductive part of the cable serves to bond adjacent towers to earth ground, and shields the high-voltage conductors from lightning strikes. The optical fibers within the cable can be used for high-speed transmission of data, either for the electrical utility's own purposes of protection and control of the transmission line, for the utility's own voice and data communication, or may be leased or sold to third parties to serve as a high-speed fiber interconnection between cities
Several different styles of OPGW are made. In one type, between 8 and 48 glass optical fibers are placed in a plastic tube. The tube is inserted into a stainless steel, aluminum, or aluminum-coated steel tube, with some slack length of fiber allowed to prevent strain on the glass fibers. The buffer tubes are filled with grease to protect the fiber unit from water and to protect the steel tube from corrosion; the interstices of the cable are filled with grease. The tube is stranded into the cable with aluminum, aluminum alloy or steel strands, similar to an ACSR cable. The steel strands provide strength, and the aluminum strands provide electrical conductivity. For very large fiber counts, up to 144 fibers in one cable, multiple tubes are used.
In other types, an aluminum rod has several spiral grooves around the outside, in which fibers in buffer tubes are laid. The fiber unit is covered with a plastic or steel tape, and the whole surrounded with aluminum and steel strands.
Individual fibers may be in "loose buffer" tubes, where the inside diameter of the tube is greater than the fiber outside diameter, or may be "tight buffered" where the plastic buffer is coated directly on to the glass. Fibers for OPGW are single-mode type.
Main features:
1. Highquality standard design, testing and production, using Class A materials to ensure long-term reliability；
2. Easy maintenance, easy line span, its mechanical properties can meet the large line span; The outer layer of OPGW is metal-armoured, which has no effect on high voltage corrosion and degradation；
3. The construction of OPGW must be power outage, resulting in greater losses, so the construction of high-voltage lines above 110kv must use OPGW;
4. OPGW cable is mainly used for 500KV, 220KV and 110KV 35KV lines, limited by power failure, safety and other factors, mostly used for new lines；
5. Sealed stainless steel tube provides excellent moisture and extreme environmental protection for optical fiber.
Structure & Technical Specifications:
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OPGW-48B1-100 118.8;66.2 Ground Wire Cable 48 72 288 Core For Tower Comuni infrastruction Images
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