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Description:Features: 1) Circuit requirements: a) Frequency: 50Hz / 60Hz b) Rated voltage: AC 660V c) Rated current: 630A 2) Production standards: IEC30947, VDE0660 3) Used for AC motors with frequent starting 4) Can be used as 3TD series convertible contactors to control motor starting, breaking off and reversing, when these products are combined with mechanical interlocking devices