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Description:Features: 1) In accordance with the IEC1008-1 and GB16916.1-1997 standards, applying to the circuit of AC 50/60Hz, 240V single phase, 415V 3-phase or below 2) For industrial and mining enterprises, trade buildings, and other commercial and industrial places 3) Mainly used for preventing electrical fire and accidents caused by electric shock or leakage of electrified wire net 4) Current-operated, fast leakage protector of pure electromagnetic type, which can break off fault circuits rapidly in order to avoid accidents 5) The item is precise in structure, with less elements, without auxiliary power, high working reliability 6) The function of the switch will not be influenced by ambient temperature and lightning 7) The mutual inductor of the item is used to test vector differential values of passing currents, and produces a relevant output power and adds it to the tripper in secondary winding 8) If the current of vector differential value of protected circuit of personal electric shock is up to or over leakage operating current, the tripper will act and cut off so that the item will be protected