What is the difference between EV high voltage cable sheath and insulation?
China [CN] EV high-voltage cables are mainly composed of conductors, insulation, shielding and sheathing. The insulating layer mainly plays the role of shielding electromagnetic interference, while the outer sheath of the cable is the outermost layer of the cable, and its main function is to protect the inner core and the insulating layer. So what materials are mainly used for insulation and sheathing, do you know?
1. The main function of the outer sheath of the cable is to strengthen the insulation performance while protecting the cable from mechanical damage.Sheath materials can be divided into metallic materials and non-metallic materials.Metallic materials include copper sheath, aluminum sheath and lead sheath.Non-metallic sheaths include polyvinyl chloride, polyethylene, polypropylene, nylon, fluoroplastics, silicone rubber, neoprene, chlorosulfonated polyethylene, nitrile rubber, low-smoke halogen-free polyolefin, polyurethane, etc.
2. The sheath is the appearance of the cable.The appearance is required to be smooth and round, with uniform luster, no deviation from the core material (not exceeding the specified deviation), no mechanical damage, flattening, no visible debris, bubbles, trachoma, obvious particles, slub shape, twisted shape, etc.
3. Cable outer sheath standard
The thickness of the sheath is calculated and controlled according to the standard, and the calculation formula is D (outer diameter before extrusion) × 0.035+1
The thinnest point of the single-core sheath: nominal value × 85%-0.1;
The thinnest point of the multi-core sheath: nominal value × 80%-0.2;
4. The difference between the outer sheath of the cable and the insulation layer of the cable
The jacket material is mainly used to protect the cable.Used to select sheath material according to external conditions, temperature, humidity, chemical environment, special requirements and other factors;insulating material mainly protects conductor insulation.Non-insulating materials and temperature classes are selected based on conductor heating conditions, service life and special requirements.
For more information on EV high-voltage cables, please visit OMG's official website:https://www.omgevcable.com/
Click enlarge Image