On the afternoon of July 12, Gaogong LED research team came to Xiamen Xinda Optoelectronics Technology Co., Ltd.
Liu Hong, executive deputy general manager of Cinda Optoelectronics, and Lin Bin, deputy director of the application industry, led the high-tech LED research team to visit the production line and its products.
The two sides discussed the hot topic of LED. Liu Hong said that the LED market is overheated, the bubble is blowing a lot, and the street lamp market is over-reliant on relationship marketing. How to develop LED lighting in a healthy and orderly manner requires more people in the industry to discuss more exchanges.
According to reports, Cinda Optoelectronics registered capital of 200 million yuan, with two major product divisions, a research and development center, mainly produces series of in-line LED, SMD LED, high-power white LED, LED road lighting, LED tunnel lighting Lamps, LED traffic lights, LED indoor lighting, LED display and other products.
Liu Hong expressed his love for Gaogong LED magazine and thought that the news comment column was very exciting and the viewpoint was sharp and spicy.
Power cables are cables used to transmit and distribute electrical energy. Power cables are commonly used in urban underground power grids, power station outlet lines, internal power supply for industrial and mining enterprises, and power lines under river water.
In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electrical energy in the backbone of power systems, including various voltage levels from 1-500KV and above, and various insulated power cables.
The use of power cables has been around for more than a hundred years. In 1879, the American inventor T.A. Edison wrapped jute around a copper rod and put it into the iron pipe, and then filled the asphalt mixture to make a cable. He laid the cable in New York and created underground power transmission. The following year, the British Karende invented the asphalt impregnated paper insulated Power Cable. In 1889, the British S.Z. Ferranti laid a 10 kV oil-impregnated paper insulated cable between London and Dartford. In 1908, the UK built a 20 kV cable network. Power cables are becoming more widely used. In 1911, Germany laid a 60 kV high-voltage cable and began the development of high-voltage cables. In 1913, the German M. Hoichstedt developed a phase Shielded Cable, which improved the electric field distribution inside the cable and eliminated the tangential stress of the insulating surface, which became a milestone in the development of power cables. In 1952, Sweden laid a 380 kV ultra-High Voltage Cable in the northern power plant to realize the application of ultra-high voltage cable. By the 1980s, 1100 kV and 1200 kV UHV power cables were made.
basic structure
The basic structure of the power cable consists of a core (conductor), an insulating layer, a shielding layer and a protective layer.
Folding core
The core is the conductive part of the power cable that is used to carry electrical energy and is the main part of the power cable.
Folding insulation
The insulating layer electrically isolates the core from the earth and the cores of different phases to ensure electrical energy transmission, and is an indispensable component of the power cable structure.
Folding shield
Power cables of 15KV and above generally have a conductor shield and an insulating shield.
Folding protective layer
The role of the protective layer is to protect the power cable from external impurities and moisture, and to prevent external forces from directly damaging the power cable.
Power Cable
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