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IEEE 1138-2009 pdf free

IEEE 1138-2009 pdf free.IEEE Standard for Testing and Performance for Optical Ground Wire (OPGW) for Use on Electric Utility Power Lines.
For the purposcs of this document. thc ftIlowing tcrms and dctinitions apply. The IEEE Standards J)ictionarv Glossary tf Terms & Definitions should be referenced for terms not defined in this clause.”
hardare: Attachments or fittings thai are in direct contact with the cable.
maximum design load (MDL): The maximum design load the cable is expected to experience in service under meteorological loading conditions (e.g.. wind, ice loads, temperature). The MDL. is used in determining the maximum rated design tension.
maximum rated design tension (MRDT): Thc maximum tension rating of the cable so it will function over its lifetime without reducing the performance of the optical fibers. This tension rating will be determined by the cable manufacturer. MRDT may be expressed in terms of tension or as a percentage of rated tensile strength (RTS). MRDT may also be known as maximum rated cable load (MRCL).
optical ground wire (OPGW): OPGW cable has the dual performance functions of a ground wire with telecommunications capabilities.
optical time delay reflectometer (OTDR): Used to determine the degree and location of attenuation in optical fibers by transmitting a light source and measuring time of flight and strength of retlected optical signal.
rated tensile strength (RTS): The calculated tensile load that the cable shall withstand without mechanical failure.
sagging tension (SAT): The initial tension at which the cable is pulled during the sagging portion of the installation process. This tension is used to achieve the appropriate sag relative to other conductors and the ground.
stringing tension (SiT): The tension used to pull the cable through sheaves during the stringing portion of the installation process. This is never greater than the sagging tension. Also known as installation or pulling tension.
4. Description of OPGW cable and components
There arc multiple acccptablc designs of OPGW. Typically, they consist of onc or more layers of metallic wires stranded about a cable core comprised of components such as tubes, wires and’or slotted rods, and optical fibers in optical fiber units.
4.1 Stranded metallic wires
a) The coii s,Lan .ud stranding of (he metallic wires shall bc in accordancc with the appropriatc industry standard for metallic wires and cabling such as those referenced in Clause 2. For consistency and operability with existing materials and methods used in power transmission lines, the stranded metal wires shall, where applicable, meet the appropriate wire and cabling standards as they will apply to conventional ground wire.
b) At the supplier’s option. the rated tensile strength (RTS) may include the strength of the optical unit. In this case, the supplier shall notif’ the customer if the fiber optic unit is considered a load. bearing tension member when determining the total RTS of the composite conductor.
C) The finished galvanized or aluminum-clad steel wires shall contain no joints or splices unless otherwise agreed upon between the supplier and the purchaser.
4.2 Design of fiber optic unit
The fiber optic unit shall be designed to house and protect the optical fibers from damage due to forces such as crushing. bending, twisting, tensile stress, and moisture. The fiber optic unit and the outer stranded metallic conductors shall serve together as an integral unit to protect the optical fibers from degradation due to vibration and galloping, wind and ice loadings, wide temperature variations, lightning and fault current. as well as environmental effects that may produce hydrogen. The fiber optic unit may include an aluminum tube, channeled aluminum rod, stainless steel tubing. or aluminum-coated stainless steel tubing; but is not limited to these designs.
4.2.1 Metallic tube
The fiber optic unit may include a tube such as stainless steel or aluminum to house the fibers. The tube may be fabricated as a seamless tube, seam welded, or a tube without a welded seam.
The fiber optic unit may include a stainless steel tube with an aluminum protective coating to house the fibers. The coating shall completely cover the tubes leaving no exposed areas of tubing that can make electrical contact either directly or indirectly through moisture, contamination, protrusions, etc., with the surrounding stranded wires described in 4.1.IEEE 1138 pdf download.

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