IEEE Std 1594-2020 pdf download

IEEE Std 1594-2020 pdf download.IEEE Standard for Helically-Applied Fiber Optic Cable Systems (WRAP)for Use on Overhead Utility Lines.
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 term i nation.
5.4.1 Loose buffer
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 buffer
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 manutcturer’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.
6. Test requirements
6.1 Test guidelines
For all test procedures described in Clause 6, the test temperature is 25 °C + 5 °C unless otherwise stated. All measured and computed values shall be rounded to the number of decimal places given in the corresponding requirement using the procedures ofASTM E29-06b.
6.2 Cable tests
6.2.1 Design tests
A WRAP cable shall successfully pass the design tests discussed in 6.2.1.1, 6.2.1.2, and 6.2.1.3. However, design tests may be waived at the option of the user if a WRAP cable of equivalent design has already been successfully tested.
6.2.1.1 Waterblocking test
A waterbiocking test shall be performed. No water shall leak through the open end of the sample.
A waterblocking test for cable shall be made in accordance with the requirements for TIA/EIA 455-82B, except that the test length shall be I m.
6.2.1.2 Seepage and fillinglflooding compound test
For filled/flooded fiber optic cable, seepage of filling/flooding compound test shall be performed. The filling and flooding compound shall not flow (drip or leak) at 65 °C.
A 0.3 m sample of cable shall be tested in accordance with TIA/EIA 455-81 B. The optional preconditioning cycle as described in TIA/EIA 455-81 B may be used. The unprepared cable end may be sealed.
6.2.1.3 Aeolian vibration test
An aeolian vibration test shall be carried out. As the combinations of wrapped cables and ground wire! conductor/messenger wire are significant, a representative test can be performed for a family of cable combinations. Any damage that will affect the mechanical performance of the cable or causes a permanent or temporary increase in optical attenuation greater than 1 .0 dB/test fiber km (defined as the actual fiber in the vibration test span) at 1550 nm + 20 nrn for single-mode fibers, or 1300 nm ± 20 nm for multirnode fibers, shall constitute failure. There shall be no breach of the jacket after the test. The objective of this test is to assess the fatigue performance of the WRAP cable and the ground wire on which it is installed and the optical characteristics of the fibers under typical aeolian vibrations.
6.2.1.3.1 Test setup
The general arrangement to be used for the aeolian vibration tests and the support details are shown in (Annex A). The end abutments are used to load and maintain tension in the conductor or ground wire on which the WRAP cable is installed (in the correct manner so as to simulate its installation on the line). The test section is contained between the two intermediate abutments. End and intermediate abutments need not be separate units if the combined unit affords sufficient space for the setup. The fiber optic cable to be tested shall be cut a sufficient length beyond the intermediate abutments to allow removal of the cable coverings and to allow access to the optical fibers. Suitable dead-end assemblies or end abutments are installed on ground wire or conductor to fit between the intermediate abutments. The test sample shall be terminated at both ends prior to tensioning in a manner such that the optical fibers cannot move relative to the cable. The load during the test shall be monitored using a dynamometer, load cell, calibration beam, or other device. Some means shall be provided to maintain constant tension to allow for temperature fluctuations during the testing. The conductor or ground wire shall be tensioned to 100% of its rated maximum installation tension.
In order to achieve repeatability of test results, the active span shall be 20 m or more in length, with a suitable suspension assembly located approximately two-thirds of the distance between the two dead-end assemblies.