Insulating materials and shielding materials for power cables, especially materials for high-voltage and ultra-high-voltage XLPE insulated AAAC Cables, are prominent “soft ribs” or “short boards” of China’s cable industry in this field (all sheath materials have been localized). 1. Medium and low voltage power cable materials Medium and low voltage power cables are mostly insulated … Read more
Power cables and accessories are the key products used for transmission and distribution of electric energy in the main line and distribution network line of power system, mainly including AC power cables and accessories with rated voltage U0 / u 0.6/1kv ~ 290 / kV. Among them, the rated voltage of 1.8/3kv and below is … Read more
Recently, the home decoration needs to buy Wires for construction. At this time, I don’t know which kind to buy, and I don’t know how to choose wires? So, today in this article, we will use three easy to understand steps to explain the relevant knowledge of wires in decoration, and let them know which … Read more
In order to improve the flexibility and integrity of wires and cables, two or more single wires are intertwined in the specified direction. This process is called stranding. The whole stranding process is divided into conductor stranding, cable forming, braiding, steel wire armor and winding. Any problem in any process will directly affect the cable … Read more
The phenomenon of wire joint heating is generally manifested in that there is peculiar smell around the wire joint, which can be smelled. This is because the heat of wire joint makes the outer insulation layer smell; Secondly, the ACSR Cables joint is smoking, red, the outer insulation layer is black, fire, or even broken. … Read more
In recent years, the city has developed rapidly Subway, station, hospital, school, high-rise residence Expansion of public facilities construction scale The number of high-rise buildings surged The demand for urban electricity is rising Such a densely populated key area In case of fire, the consequences are serious In recent years, the fire spread trend in … Read more
The service life of control cable is determined by the air oxidation induction period of sheath raw materials. Generally, the design scheme of control cable is applied for 20 years, which is the most applied life of control cable. Although the specific daily life is likely to be longer, from the perspective of safety, the … Read more
After the cable line breaks down (including the breakdown during preventive test), it must be repaired immediately to avoid a large amount of water invading and expanding the scope of damage. The elimination of faults must be thorough and clean. Otherwise, although it can be used after repair, it will still cause faults in the … Read more
The speed of cable fault repair directly affects the economic benefits and social image of cable operation Department, and it is also an important symbol to measure the comprehensive management level of AAC Cable operation Department. The repair of cable fault, from receiving the cable fault repair order, checking data, measuring faults, finding fault points, … Read more
1. Hazards to distribution transformer: For the distribution transformer with the wiring group of yyno, during the three-phase four wire system wiring, the third harmonic current generates harmonic voltage in the original and auxiliary windings of the distribution transformer and causes the neutral point voltage to rise. In addition, because the odd harmonics have the … Read more