Hazards of unqualified sheath thickness1. Reduce the service life of wire and cable productsThis is easy to understand. After long-term operation, especially direct burial, immersion in water, exposure to the open air or corrosive environment, the insulation level and mechanical level of the thinnes
1. IntroductionWith the increasing transmission voltage level and transmission capacity of power cables in recent years, high-voltage large-section cables have been widely used in power systems. In tunnels, high-voltage large-section cables are generally laid in a serpentine shape to reduce the ther
1. Test methodThe test method and performance criteria are based on the methods and criteria corresponding to the B1 grade combustion performance level in the GB 31247-2014 "Classification of Combustion Performance of Cables and Optical Cables" standard.2. Test deviceAccording to the GB/T 31248-2014
