RCD在正常工作情况下存在的失效风险

赵金剑（深圳和华国际工程与设计有限公司,广东省深圳市 518067）

Failure Risk of RCD under Normal Working Conditions

ZHAO Jinjian（Shenzhen WOWA International Engineering and Design

Co.,Ltd.,Shenzhen 518067,Guangdong Province，China）

Abstract：The failure risk of RCD under normal working conditions due to equipment internal fault or specific grounding type is analyzed and the electric shock risk of RCD is described from two aspects of direct contact and indirect contact.

Key words：direct contact;indirect contact;TN system;TT system;IT system;earth fault;electric shock risk;RCD

摘　要：从直接接触和间接接触两个方面，分析探讨由于设备内部故障或特定接地型式导致RCD在正常工作情况下存在失效的风险，阐述RCD可能存在的电击风险。

关键词：直接接触；间接接触；TN系统；TT系统；IT系统；接地故障；电击风险；RCD

中图分类号：TU852  　　  　      文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2022.01.005