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. Power Cable Power Cable,Computer Power Cable,Power Supply Cables,Ac Power Cable Jiangsu QiSheng Cable Co., Ltd. , https://www.shuaihe-cable.com
Zhongjing Corey is mainly engaged in the development and application of LED lighting products. It specializes in advertising lighting. Since the beginning of this year, the company has begun to focus on product development for indoor lighting and commercial lighting. Regardless of the field, Dr. Zhong Qun, the general manager of Zhongjing Kerui, adheres to his consistent product philosophy; on the basis of low cost, the first guarantees the reliability of the product and the second guarantees the long life. “Medium Kerry is going to be a high-quality product that meets human needs.†Zhong Qun told Gao Gong LED reporter.
Zhongjing Corey has an associated partner – Zhongjing Kechuang, which has leading packaging technology to provide the best package design solution for Zhongjing Corey. “The best design for large-scale luminaires in the future may be a modular product, which may be a modular package with one optical directly. This is the ideal solution, and it can achieve the lowest cost and highest reliability. To get the lighting products done, we must first master the core technology of this light source.†Zhong Qun said that Zhongjing Corey has the advantage to design the most suitable solution for each type of lighting products. 
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.
The first "High-tech LED Lighting Exhibition", which is known as "leading the new trend of global LED lighting product design and application", was grandly opened at the Shanghai International Convention Center in China from August 30th to 31st, 2011. During the exhibition, Gaogong LED reporters conducted an exclusive interview with Dr. Zhong Qun, the general manager of Zhongjing Kerui .