T/CPCIF 0230-2022 Insulating material for thermal plastic polypropylene-insulated power cables rated from 6 kV (Um = 7.2 kV) to 35 kV (Um = 40.5 kV)

Scope

Scope: This document specifies the use characteristics, classification and naming, technical requirements, test methods, inspection rules, marking and accompanying documents, as well as packaging, transportation, and storage of insulating materials for thermoplastic polypropylene insulated power cables with rated voltages of 6 kV (Um = 7.2 kV) to 35 kV (Um = 40.5 kV). This document applies to insulating materials for thermoplastic polypropylene insulated power cables with rated voltages of 6 kV (Um = 7.2 kV) to 35 kV (Um = 40.5 kV), which are directly synthesized in a reactor using acrylic and ethylene as the main raw materials under the action of a catalyst; it also applies to insulating materials for thermoplastic polypropylene insulated power cables with rated voltages of 6 kV (Um = 7.2 kV) to 35 kV (Um = 40.5 kV), which are prepared by modifying and melt-extruding polypropylene as the base material. Main technical content: - Indicator No. - Unit - Technical requirements - Test method PP-JR-35 PP-JC-35 1 Melt Mass Flow Rate (MFR) g/10 min 0.5–2.5 a See 7.4 - Change rate of melt mass flow rate after first extrusion (%): ≤10–2 - Density (g/cm3): 0.890 ± 0.020 - See 7.5 - Tensile Breaking Stress - Tensile Breaking Strain MPa % ≥20 ≥500 - See 7.6 - Air Heat Aging Test - Tensile Breaking Stress after Aging - Tensile Breaking Strain after Aging - Change rate of tensile breaking stress after aging - Change rate of tensile breaking strain after aging MPa %% ≥15 ≥450 ≤30 ≤30 - See 7.7 - Bending Modulus MPa ≤700 ≤800 - See 7.8 - AC Electrical Strength (50 Hz) kV/mm ≥35 - See 7.9 - Volume Resistivity at 90 °C Ω·m ≥1×1014 ≥1×1011 - See 7.10 - Relative Dielectric Constant (50 Hz) - Dielectric Loss Factor (50 Hz) 90 °C - Dielectric Loss Factor (50 Hz) --- ≤2.35 ≤5×10–4 - See 7.11 - Oxidation Induction Time (210 °C, AL) min ≥20 ≥10 - See 7.12 - Low Temperat

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