Being a type of new low-voltage safe apparatus, the residual current device (RCD) is used to avoid the electric shock and the fire accident.

漏电保护器是一种新型低压安全保护电器，它是低压电器中防止人身触电和漏电火灾的保护类电器。

In order to reduce the power cut off which caused by electric shock accident and earth-fault power cut off, it must install residual current operated protective device.

低压供用电系统中为了减少发生人身电击事故和接地故障切断电源时引起的停电，必须加装剩余电流动作保护装置。

This paper introduces the parameter selection, installation, grounding mode of low-voltage power grid and construction method of residual current operated protective device.

文中详细论述了剩余电流动作保护装置的参数选用，安装要求，低压电网接地方式及安装施工要求等。

The classification of failure and its distribution of DZL118 series residual current operated protective device were introduced, the causes of failure were analyzed.

介绍了DZL1 1 8系列漏电断路器产品的故障分类及其分布，分析了故障原因。

The operating principle and the use of residual current protective device is introduced, and its selection, installation and limitation are commented.

介绍了剩余电流动作保护器的工作原理及其用途，叙述了剩余电流动作保护器的选型、安装及其局限性。