小电流接地选线装置原理及其应用

Principle and Application of the Grounding Selection Device of Small Currect

小电流接地选线装置用于冶金、煤炭、石油、化工等小电流系统,提高了供电电网和企业内部电网的供电可靠性,减少了因为单相接地故障处理不及时而扩大的事故。针对我公司35kV石化电站6kV供电系统中性点接地方式,阐述了该装置的基本结构和工作原理,分析了新技术在本系统中所起的作用及带来的效果。

A small current selection device is used in small current systems of inetallurgy,coal industry,petroleum and chemical industry,which raises power supply reliability of electric network and internal network,reduces accidents because of single-phase grouding fault.The paper expounds the basic structrue and working principle of the point grounding of 6 kVpower supply system of 35kV power station of our compary,analyzes the effect of new technology in the system.