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。
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。
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