35kV及以上单芯电缆敷设方式的探讨

Probe into Laying Ways of 35 kV or Over Single-core Cables

35 kV以上单芯电缆在运行时其屏蔽层上会产生感应电动势,当电缆长度与工作电流较大时,感应电压可能达到很大的数值。电缆以紧贴三角形布置时感应电压最小,当电缆相间距离增加,相对位置改变时,感应电压都会相应改变。作者通过比较、分析,对35 kV以上单芯电缆的敷设方式探讨出了正确做法,并在工程施工中予以实施。

Induced e.m.f.will occur on the shielding layer when over 35kV single-core cables are working.When the cables are longer and their working current is stronger,its induced voltage can reach a very big numerical value.The induced voltage is lowest when the cables are laid very clinging to triangle.When the space between cables increases and their relative position changes,induced voltage will correspondingly change.These authors,via comparison and analysis,explored correct laying ways of over 35 kV single-core cables and implemented them in construction.