IEEE 1222:2019 pdf free download – IEEE Standard for Testing and Performance for All-Dielectric Self-Supporting (ADSS)Fiber OpticCable for Use on Electric Utility Power Lines
4.1 Descriptions
The ADSS cable shall consist of coated glass optical fibers grouped in one or more protective dielectricunits surrounded by or attached to suitable dielectric strength members and jackets. The cable shall notcontain metallic components.The cable shall be designed to meet the requirements under all specifiedinstallation conditions, operating temperatures, and environmental loading.
4.2 Fiber optic cable core
The fiber optic cable core shall be all-dielectric and shall contain coated glass optical fibers that areprotected from mechanical, environmental, and electrical stresses.Materials used within the core shall becompatible with one another, shall not degrade under the electrical stresses to which they may be exposed,and shall not evolve hydrogen in quantities sufficient to degrade optical performance of fibers within thecable.
4.2.1 Fiber strain allowance
The cable shall be designed such that fiber strain does not exceed the limit allowed by the cablemanufacturer under the operational design limits (MRCL) of the cable. Maximum allowable fiber strain isgenerally a function of the proof test level, and the strength and fatigue parameters of the coated glass fiber.The maximum fiber strain shall not exceed the limit specified in 6.5.1.2.The optical fiber attenuationincrease while under fiber strain shall also meet the requirements listed in 6.5.1.2.
4.2.2 Central strength element
lf a central strength element is necessary, it shall be of reinforced plastic, epoxy glass, or other dielectricmaterial. If required, this element shall provide the necessary tensile strength to limit axial stress on thefibers and minimize fiber buckling due to cable contraction at low temperatures. The strength element shallalso meet the stress strain fatigue requirements in 6.5.1.3.
4.2.3 Buffer tube filling compound
Loose buffer tubes shall be water-blocked with a suitable material compatible with the tubing material,fiber coating,and coloring, to protect the optical fibers and prevent moisture ingress.
4.2.4 Cable core water blocking compound
The design of the cable may include suitable water blocking materials in the interstices to prohibit watermigration along the fiber optic cable core. The water blocking matcrial shall be compatible with allcomponents with which it may come in contact.
4.2.5 Binderltape
A binder yarn or yarns and/or a layer or layers of overlapping non-hygroscopic tape(s) may be used to holdthe cable core elements in place during application of the jacket.
4.2.6 lnner jacket
A protective inner jacket or jackets of a suitable material may be applied over the fiber optic cable core,isolating the cable core from any external strength elements and the cable outer jacket.
4.3 Optical fibers
Single-mode fibers such as dispersion-unshifted, dispersion-shifted, or non-zero dispersion shifted as wellas multimode fibers with 50/125 um or 62.5/125 um core/clad diameters are considered in this standard.
All single-mode fibers shall meet the requirements of IEC 60793-2-50.8All multimode fibers shall meet therequirements of IEC 60793-2-10.The core and the cladding shall consist of all glass that is predominantlysilica (SiOz). The coating is usually made from one or more materials,such as acrylate, and shall protectthe fiber during manufacture, handling, and operation.
4.4 Buffer construction
The individually coated optical fiber(s) or fiber ribbon(s) may be surrounded by a tube for protection fromphysical damage during fabrication,installation,and operation of the ADSs cable.Loose bufferconstruction is a typical type of protection that may be used to isolate the fibers. The fiber coating shall bestrippable for splicing and termination.
4.4.1 Loose buffer
Loose buffer construction shall consist of a tube that surrounds each fiber or fiber group such that the innerdiameter of the tube is greater than the outside diameter of the fiber or fiber group. The interstices insideand outside the tube shall contain a water blocking material.
4.5 Color coding and performance
Color coding is essential for identifying individual optical fibers and groups of optical fibers. The colorsshall be in accordance with EIATIA-598. The original identification of fibers and units shall remaindiscernible throughout the design life of the cable when cleaned and prepared per manufacturer’srecommendations.