剩余电流动作保护器在接地系统中的应用分析

Application analysis of residual current operated protective devices in grounding system

剩余电流动作保护器在不同的接地系统中有其适用性和严格的接线方式,错误地选用剩余电流动作保护器或不规范地接线,会使剩余电流动作保护器误动或拒动,甚至引起人身触电和电气火灾事故。从剩余电流动作保护器工作原理出发,着重于用电设备的电流矢量分析与计算,阐述剩余电流动作保护器在低压配电接地系统中的应用特性,定量地分析接地系统类型对剩余电流动作保护器工作的影响。电流矢量的分析方法为剩余电流动作保护器的应用提供理论依据。

Residual current operated protective devices(RCD)has its applicability and strict wiring method in different grounding systems.Wrong selection of residual current operated protective devices or non-standard wiring will cause residual current operated protective devices to malfunction or refuse to operate,and even further cause personal electric shock and electrical fire accidents.Starting from the working principle of residual current operated protective devices,it focuses on the current vector analysis and calculation of electrical equipment,expounds the application characteristics of residual current operated protective devices in low-voltage power distribution grounding system,and quantitatively analyzes the influence of grounding system types on residual current operated protective devices.The analysis method of current vector provides a theoretical basis for the application of residual current operated protective devices.