The NDM3L series of molded case residual current action protectors (hereinafter referred to as protectors) apply to infrequent switching of circuits with the AC 50Hz, the rated working voltage of AC 400V and rated working current of 630A as well as infrequent motor starting. With the overload, short circuit and undervoltage protection functions, the protector can protect lines and power equipment from damage. Meanwhile, they can deal with the personal safety, fire hazards and other potential risks caused due to long-term ground faults that can't be detected with the overcurrent protection function.
