四极电子式RCD用于单相负荷的缺陷探讨  

Discussion on the Defects of Quadrupole Electronic RCDUsed for Single-Phase Load

作　　者：王统 WANG Tong(Fujian Xinguangsha Engineering Design&Consultant Institute Co.,Ltd.,Fuzhou 350014,China)

机构地区：[1]福建省新广厦工程设计研究院有限公司,福建福州350014

出　　处：《现代建筑电气》2024年第1期26-31,共6页Modern Architecture Electric

摘　　要：研究了四极电子式RCD用于单相负荷理论上的可行性。运用实例和理论分析,证明了单相负荷不平衡并不影响四极电子式RCD的动作特性。运用实例分析了单相负荷接地故障受自然泄漏电流干扰的情况,得知导致四极电子式RCD误动作的原因是自然泄漏电流。提出四极RCD接单相负荷易出现“断零”事故,并提出采用“3P+N”极RCD可避免此种事故。The theoretical feasibility of using quadrupole electronic RCD for single-phase loads is studied.By using examples and theoretical analysis,it has been proven that single-phase load imbalance does not affect the operational characteristics of quadrupole electronic RCD.By using examples to analyze the interference of natural leakage current on single-phase load grounding faults,it is found that the culprit causing the misoperation of quadrupole electronic RCD is the natural leakage current.It is proposed that connecting a four pole RCD to a single-phase load is prone to a“zero break”accident,and the use of a"3P+N"pole RCD can avoid such accidents.

关 键 词：剩余电流动作保护电器 电子式RCD 单相负荷 自然泄漏电流 三相不平衡 

分 类 号：TU852[建筑科学]