The Method of Laying Medium Voltage Power Cable?

<a href="http://www.zmscable.com/news/646.html?Voltage Power Cable">The Method of Laying Medium Voltage Power Cable?</a>
　The Method of Laying Medium Voltage Power Cable
　　In the year of 2011, total output value of China's wire and cable surpass the US and become the world's largest wire and cable manufacturing country. The worldwide demand for wire and cable is till to be marketd, especially the medium voltage power cable (MV cable). China occupy favovable and advantageous position not only in technical strength, but also low production cost.
　　As a matter of fact, during the medium voltage cables in service,the cable breakdown caused by improperly laying XLPE insualtion power cable taks up a considerable proportion of cable operation failiure. Therefore, it is imminent to grasp a comprehensive knowledge and understanding of science XLPE power cable laying .This artical focus on introducing land laying method for XLPE insulation power cable.
　　Laying in Tunnel
　　Laying in Tunnel, usually refers to a place that accommodates 21 or more cables, and is equiped with testing and maintainance tunnel, and a fully isolated tunnel to lay cables. The number of cables are allowed to be increased or decreased at any time without secondary ground-breaking work, having strong resistance to external mechanical properties, and also very convenient to carry out the inspection and maintenance works.
　　During laying, during the laying of the tunnel, we must first understand voltage levels, cable diameter and insulation material properties of the cable jacket, and then to determine the distance between the cable arrangement.
　　Cable tunnel are required to be equipment with lighting, drainage systems, and the use of mechanical ventilation and natural ventilation double ventilation system to reduce humidity of the air in the tunnel, besides, the tunnel also is equiped with smoke alarm system, automatic fire extinguishing system and fire hydrants, and some cable tunnel is also equipped with a temperature control systems, on-line monitoring system, anti-theft system etc.
　　Despite the many advantages of laying in tunnel, but many construciton units give up laying in tunnel to save budget and shorten the projects period, because the tunnel construction involves of high investment, high cost and long construction period. Currently, even the laying in tunnel is not widely applied in China, but wided used in developed countries like Japan and South Korea.
Laying of medium voltage power cables, the method of share is provided by zmscable.com