It is usually a rope-like cable twisted together by several or several groups of wires [at least two in each group]. Each group of wires is insulated from each other and often twisted around a center, with a highly insulating covering layer on the entire outside. Wires and cables refer to materials
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
