王厚余（中国航空工业规划设计研究院，北京市 100011）

The Concept to 10 / 0.4 kV Substation Grounding to be Renewed

Wang Houyu（China Aeronautical Project and Design Institute,  Beijing 100011，China）

Abstract  Some unsuitable practices are still available now in 10 / 0 . 4 kV substation for building electricity, such as neutral point local grounding of transformer LV side, setting of PEN & PE conductor, resistance of grounding device and necessity of taking manual grounding pole. The author considers that the substation shall be grounded as per IEC standards, giving up the out-of-time practices, renewing the concept and meeting the new requirements for technology of power consumption, so that grounding of substation can ensure the safety and function of electrical equipments, as well as avoid such waste in manpower and material resources.

Key words  Grounding of substation Manual grounding Natural grounding Equipotential bonding PEN conductor PE conductor

摘　要　现时我国建筑电气10/0.4　kV变电所接地的一些做法恐存在不少问题。例如在变压器低压侧中性点的就地接地、PEN线和PE线的设置、接地装置的接地电阻值、打人工接地极的必要性等都存在一些问题。变电所的接地应按IEC标准，摒弃一些过时的做法，更新观念，满足用电技术的新要求，使变电所的接地既能保证电气装置的安全性和功能性，又可避免不应有的人力物力浪费。

关键词　变电所接地　人工接地　自然接地 等电位联结　PEN线　PE线