IEEE 1594-2020 pdf download

IEEE 1594-2020 pdf download.IEEE Standard for Helically-Applied Fiber Optic Cable Systems (WRAP) for Use on Overhead Utility Lines
4. Description of WRAP cable and component
The WRAP cable shall consist of coated glass optical fibers contained in a protective dielectric fiber optic unit, surrounded by a UV resistant jacket.
The cable shall not contain metallic components. The cable shall meet the design requirements under all installation conditions, operating temperatures, and ground wire environmental loadings.
5. Component requirements
5.1 Support systems Support systems for the cable itself are not required. The ground wire, phase wire, or other messenger in overhead power facilities around which the cable is wrapped provides all the support for the composite system and eliminates the need for the cable to be self-supporting.
5.2 Fiber optic cable core The fiber optic cable core shall be made of coated glass optical fibers housed to protect them from mechanical, environmental, and electrical stresses. Materials used within the core shall be compatible with one another, shall not degrade under the electrical stresses to which they may be exposed, and shall not evolve hydrogen sufficient to degrade optical performance of fibers within the cable.
5.2.1 Fiber strain allowance The fiber optic cable core shall be designed so that the fibers remain tensile stress-free under the maximum working elongation of the cable being wrapped on, and taking into consideration strains created during the installation.
5.2.2 Central structural element If a central structural element is necessary, it shall be of reinforced plastic, epoxiglass, or other dielectric material. If required, this element shall provide the necessary tensile strength to limit axial strain on the fibers and minimize fiber buckling due to cable contraction at low temperatures.
5.2.3 Bufer tube flling compound Loose buffer tubes shall be filled with a suitable compound compatible with the tubing material, fiber coating, and coloring to protect the optical fibers and prevent moisture ingress.
5.2.4 Cable core flling/fooding compound The design of the cable shall include a suitable filling/flooding compound or water-swellable material in the interstices to prohibit water migration along the fiber optic cable core. The filling/flooding compound or water-swellable compound shall be compatible with all components with which it may come in contact.
5.2.5 Binder/tape
A binder yarn(s) and/or layer(s) of overlapping non-hydroscopic tape(s) may be used to hold the cable core elements in place during application of the jacket.
5.3 Optical fbers
Single-mode fibers, dispersion-unshifted or dispersion-shifted, and multimode fibers with 50/125 μm or 62.5/125 μm core/clad diameters are considered in this document. The core and the cladding shall consist of glass, which is predominantly silica (SiO2). The coating, usually made from one or more acrylate materials or compositions, shall be provided to protect the fiber during manufacture, handling, and use.
5.4 Bufer construction
The individually coated optical fiber(s) may be surrounded by a buffer for protection from physical damage during fabrication, installation, and performance of the WRAP cable. Loose buffer or tight buffer construction are two types of protection that may be used. The fiber coating and buffer shall be strippable for splicing and termination.
5.4.1 Loose bufer
Loose buffer construction shall consist of a tube or channel that surrounds each fiber or fiber group. The inside of the tube or channel shall be filled with a filling compound.
5.4.2 Tight bufer
Tight buffer construction shall consist of a suitable material that comes in contact with the coated fiber.
5.5 Color coding Color coding is essential for identifying individual optical fibers and groups of optical fibers. The colors shall be in accordance with TIA/EIA 598-D.
5 5.5.1 Color performance The original color-coding system shall be discernible and permanent, in accordance with TIA/EIA 598- D, throughout the design life of the cable, when cleaned and prepared per WRAP cable manufacturer’s recommendations.
5.6 Jackets
The outer jacket shall be designed to house and protect the inner elements of the cable from damage due to moisture, sunlight, environmental, thermal, mechanical, and electrical stresses, as follows:
a) The jacket material shall be dielectric, non-nutrient to fungus, and may consist of a polyethylene containing carbon black and an antioxidant.
b) The jacket shall be extruded over the underlying element and shall be of uniform diameter.
c) When installed on ground wires, electrical stress requirements and concerns normally do not apply; for some high voltage transmission line designs, the ground wire may exhibit higher than normal surface gradients (i.e., 10 kV/cm). In these cases, a track-resistant jacket shall be considered. For cable that is wrapped around a phase conductor, the jacket shall be track resistant.IEEE 1594 pdf download.IEEE 1594-2020 pdf download