6 12 24 Core OPGW Fiber Cable Stranded Ground Composite Wire Small Diameter

Overview

Optical Fiber Composite Overhead Ground wire (OPGW) is a type of cable that is used in overhead power lines. Such cable combines the functions of grounding and communications.

An OPGW cable contains a tubular structure with one or more optical fibers in it, surrounded by layers of steel and aluminum wire.It is mainly used for communication lines of 110kV, 220kV, 500kV, 750kV and new overhead high-voltage transmission systems. It also can be used to replace the existing ground wire of the old overhead high-voltage transmission system.

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. Special structures can be customized according to user needs.

Constuction :

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, aluminium 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.

Features

• Large cable diameter for designing larger fiber counts

• Stable structure and high reliability

• High tensile strength and short-circuit current capacity for optimum balance of mechanical and electrical performance

• Optimal stranded design can obtain secondary optical fiber excess length

• The number of stranded layers can be designed as two or three layers.

• The single wire can be a combination of aluminium clad steel wire or aluminium alloy wire and aluminium wire.

Characteristics

• Stainless steel tubes filled with hydrophobic gel provide the protection and support of the optical fibres
• Good tensile performance
• Small diameter, light weight, low additional load to the tower
• Appropriate fibre excess length of optical unit easliy to make

Optical Fibre Characteristics

Constructions and Performance

Note: D is cable diameter.

Specific Type and Technical Data

Other optical fibre type and count, stranded wire are available om request.

Mechanical and Environmental Test Characteristics

Packaging and Drum

• Standard Cable Drum
• Standard reel length: 2/3km/reel, other length is also available

Packaging Details:

1-5KM per roll. Packed by wooden drum. Other packing available according to client`s Request.

Sheath mark:

The following printing(white hot foil indentation)is applied at 1meter intervals.

a. Supplier: ZXOFC or as customer required;

b. Standard Code(Product Type, Fiber Type,Fiber Count);

c. Year of manufacture: 14 years;

d. Length marking in meters.

Port:

Shenzhen/Hongkong/GuangZhou

Lead Time:

Note

The Packing standard and details as above is estimated and final size&weight shall be confirmed before shipment.

The cables are packed in carton, coiled on Bakelite & wooden drum. During transportation, right tools should be used to avoid damaging the

package and to handle with ease. Cables should be protected from moisture, kept away from high temperature and fire sparks, protected from

over bending and crushing, protected from mechanical stress and damage.