In low-voltage distribution system, the current of zero line is smaller than that of live line. This is because when the three-phase load is balanced, the three-phase current is completely offset, and the zero line current is zero; However, when the AAC Cables consumption of three-phase load is unbalanced, the three-phase current cannot be completely … Read more
Mineral insulated ACSR Cable, the full English name is mineral insulated cable, and the abbreviation is (MI) cable. Due to its complex process, high production cost and much higher market price than conventional YJV and yjy cables, it was rarely used in China at the initial stage and was only used in important places with … Read more
A quality inspection organization has conducted a sampling survey on domestic wires and cables. The results show that the qualified rate of wires and cables in production enterprises that have passed ISO 9000 certification is less than 90%, while the qualified rate of products in small-scale wire and cable production enterprises that have not passed … Read more
The low-voltage power grid in urban residential areas generally adopts the three-phase four wire system. The four core cable used in the low-voltage power grid, except for the three-phase conductor, is called the neutral wire. It can pass through the unbalanced current of three-phase AC and has the function of protective grounding. Three core cable … Read more
The International Electrotechnical Commission Standard IEC 287-3-2 / 1995 puts forward the viewpoint of economic optimization of cable size, that is, conductor section: the selection of cable conductor section should consider not only the initial cost of cable line, but also the power loss cost of AAAC Cable during its economic life, which should comply … Read more
ACSR Cable is the bridge between power supply equipment and electrical equipment, which plays the role of transmitting electric energy. It is widely used, so faults often occur. The following briefly analyzes the causes of common problems of YJV high-voltage cable. According to the causes of faults, they are roughly divided into the following categories: … Read more
In the production process of rubber sheathed AAC Cable, there are often appearance defects, such as unsmooth surface; Clinker particles (early vulcanized rubber particles) or impurities on the surface; Scratch and scratch on the surface of wires and cables; Surface collapse; There are hemp patterns on the surface. The following are five common causes of … Read more
Based on the underground cable informatization model developed by China Electric Power Research Institute, the “perspective” management of underground cables can significantly improve the design, construction, operation and maintenance and management level of underground ACAR Cable lines. Firstly, this technology can make the route planning and design of underground cable engineering more reasonable. Using three-dimensional … Read more
Install “perspective eyes” for underground cables In many cities in China, especially in some metropolises or new urban areas, power towers and wires are basically invisible, but thousands of households can use electricity normally. Where does people use electricity come from? In fact, this mainly depends on underground cables to transmit electric energy. Underground cable … Read more
Fireproof cable has become an indispensable item in our daily life and production, followed by accidents caused by wires and cables, especially when wires and cables explode after combustion, it is easy to cause casualties. Every year, all kinds of wires and cables cause accidents. The fire accident continues. Most of the shells of ordinary … Read more