摘要
电力系统工作的可靠性与过电压大小密切相关。电气设备过电压防范工作对保证系统安全正常运行具有重要意义。结合实际情况,从电缆护层过电压保护器参数的选择和电缆接地电阻的要求两方面探讨了单芯电力电缆护层的过电压保护技术,防止雷电过电压和内部过电压造成电缆金属护层多点接地的故障。
The functional reliability of electric system is closely related with overvohage size. It has important significance for overvoltage prevention work of electric equipment to ensure the safe and normal operation of system. Combined with the actual conditions, discussed the overvoltage protection technology of single-core cable sheath from two aspects that preferences of cable sheath overvohage protector and requirement of cable grounding resistance, to prevent the muhipoint earth fault of cable metal sheath caused by lighting overvohage and inner overvoltage.
出处
《铁合金》
2012年第2期34-36,共3页
Ferro-alloys
