The YJV power cable is composed of one or several soft wires, and the outer covering is covered with a light soft sheath; the cable is composed of one or several insulated wires, and the outside is covered with a tough outer layer made of metal or rubber. As we all know, there are single-core … Read more
When the power cable passes through a certain load current, it will be heated. With the increase of the load current, the cable surface temperature will be higher. If it is not handled in time, the consequences can be imagined. For example: PVC cable, the core temperature of 70 degrees is considered as the upper … Read more
Cables, especially PVC insulated power cables, have been widely used in urban power grid reconstruction projects. However, due to the particularity of the cable, the installation, operation and maintenance of the cable have special requirements. Cable insulation resistance is reduced by damp or water intrusion, which is an important aspect of cable line operation accidents. … Read more
First, fire prevention, fire resistance is very superior In order to ensure the normal power supply of the cable in flame, that is, to keep the cable structure stable under fire conditions, a layer of coating with fire resistance and expansion performance was added in the cable structure design. The volume expansion of the coating … Read more
At present, there are some cables with better temperature characteristics in China, such as: 1. Rubber insulated cables: The long-term operating temperature of WYJHDP wire core for rubber insulated cables in the field shall not exceed -45 ~ 50℃. WYJHQ, a mobile rubber insulated cable used in the field, operates at -45 ~ 50℃. The … Read more
The fan Angle needs to be adjusted by the yaw driver according to the wind direction. Power, control and communication cables bend along the horizontal axis or rotate along the vertical axis. This makes the torsional flexure more demanding and requires more attention. Although there are currently no standards or regulations regarding torsional flexure, end … Read more
XLPE cable is solid insulation, do not need complex oil filling system, do not need to detect oil level, control oil pressure, low operating cost; XLPE cable without lead sheath, small bending radius, light weight, can produce, lay the length of longer, and in laying installation and transportation are simpler than oil cable; XLPE submarine … Read more
When mechanical stress or external force causes cable sheath and insulation damage and joint damage, moisture or moisture will be immersed along the longitudinal and radial gap of the cable, reducing the electrical strength of insulation. Therefore, most high voltage submarine cables have longitudinal and radial waterproofing measures to prevent moisture invasion. Radial measures are … Read more
1. Bare wire and bare conductor products The main features of this class of products are: pure conductor metal, no insulation and sheath layer, such as steel-cored aluminum strand wire, copper-aluminum busbar, electric locomotive wire; The processing technology is mainly pressure processing, such as melting, rolling, drawing, stranded/pressed stranded, etc. Products are mainly used in … Read more
BTTZ mineral insulated cable 1.BTTZ cable structure Its structure is: 1. Solid conductor; 2. Magnesium oxide mineral insulation; 3. Copper sheath. 2. Performance characteristics of BTTZ cable The advantages of BTTZ cable are: it is a non-combustible cable with excellent waterproof performance and radial waterproof and moisture-proof function. The disadvantage of BTTZ cable is: (1) … Read more