T/GDWCA 0028-2018 Rated voltage 450/750V and below special purpose insulated high temperature installation wire made of polychlorotrifluoroethylene (PCTFE) and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) or other similar materials

Scope

Scope: This standard specifies the product classification and basic parameters, usage characteristics, structure, finished cable testing, delivery length, inspection rules, marking, packaging, transportation, and storage of high-temperature installation cables with FEP (polytetrafluoroethylene) and PFA (perfluorinated alkoxyethylene ether copolymer) insulation for rated voltages of 450/750V and below for special purposes. This standard applies to cables used for connecting electrical equipment and instruments in special fields such as aviation, aerospace, high-speed rail, steel smelting, computers, mobile phones, lighting industries, etc. Main technical content: I. Structure: 1. The insulation should be tightly wrapped around the conductor core and be easy to strip off without damaging the insulation layer and plating. 2. The concentricity of the cable should be not less than 80%. 3. The weaving density of the cable's braided shielding should be not less than 85%, etc. II. Finished cable testing: 1. Insulation resistance of the cable's conductor core: It should be not less than 1.5×103 MΩ·km. 2. For conductors with a nominal cross-sectional area of ≥0.5 mm2, the sample should be a single wire removed from the conductor; for conductors with a nominal cross-sectional area of <0.5 mm2, the sample should be a complete conductor. When testing the entire conductor, the measured value should be taken when the first single wire in the sample breaks. 3. The test should be performed in accordance with the DZ-3 method in GB/T 12666.2-2008, etc.

Development Information

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