电缆护层保护器原理及应用  

Theory and Application of Cable Sheath Protector

作　　者：王培雄 

机构地区：[1]中铁建电气化局集团南方工程有限公司,武汉430071

出　　处：《价值工程》2011年第2期200-201,共2页Value Engineering

摘　　要：在10～35kV电力系统中,电缆都为三芯结构,而在高速铁路10KV电力系统中,电缆都为单芯结构,本文分析了单芯电缆金属护层产生的感应电压过高及形成环流的原理,并采用一端金属护层直接接地,另一端金属护层经护层保护器接地的方法避免了电压过高及形成环流。单芯电缆各相之间相互不干扰,能提高供电可靠性,缩短电缆检修时间,方便电缆检修维护。In power system of 10 - 35kV, eables are three core structure, while in the power system of 10KV of high-speed railway, cables are the single core structure. This paper analyzed inductive voltage which was too high generated by metal protective layer of single core cable and the theory of forming circulation. The paper provided a method which metal protective layer of one end directly grounded, and another end grounded after sheath protector, which avoided the voltage which was too high and the formation of circulation. The single core cable does not interfere with each other, which can improve reliability of the power supply, shorter1 time of repairing cable and conveniently maintain cable.

关 键 词：单芯电缆 护层保护器 环流 过电压 

分 类 号：TM7[电气工程—电力系统及自动化]