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。
Fire accident can arise from low-voltage arc fault, and so it is necessary to detect arc fault.
低压故障 电弧有引发火灾的危险，所以检测故障 电弧是必要的。
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