贺湘琨（中机中电设计研究院，北京市　100048）

Some Problems of the Classification and Selection of Residual Current Device

Ji Huiyu（Shanghai Electrical Apparatus Research Institute（Group）Co.，Ltd.，Shanghai 200063，China）

He Xiangkun（China Electric Design and Research Institute，Beijing 100048，China）

 

Abstract The paper discusses some technical problems in regard to the classification and selection of residual current device （RCD）. It indicates that both electromagnetic RCD and electronic RCD have their respective advantages technically，and the use of either type of RCD product shall not be restricted arbitrarily. As long as the requirements of corresponding national standards are satisfied，both types of RCD can meet the operating requirements in terms of operating reliability.

Key words　Residual   current   device　Classification of RCD　Some problems in the selection of RCD　Grounding fault

 

摘　要　论述剩余电流动作保护电器（RCD）的分类和选用中的若干技术问题。认为电磁式剩余电流动作保护电器和电子式剩余电流动作保护电器在技术上各有优势，不宜任意限制某一种型式产品的使用。只要符合相应的国家标准的要求，两种型式的剩余电流动作保护电器在工作的可靠性方面均是可以满足使用要求的。

关键词　剩余电流动作保护电器　RCD 的分类　RCD 选用中的若干问题　接地故障