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AM3 Series molded case circuit breaker / MCCB. It's applicable circuit of AC 50Hz (or 60Hz), rated insulation voltage 660V, rated operating voltage under AC 660V, 250V (DC), rated operating current 10A-1600A, for distribute energy of electricity and infrequent making and breaking circuit. In normal conditions, the MCCB rated current under 400A. They are provided with the function of the protection against overload and short circuit and under voltage. The MCCB complies with standard of IEC947-2, GB14048.2, GB14048.4 and so on.Motor operators: Motor operator are used to make or break the MCCB automatically in the distanceLock device: 1. With padlock front panel type is used by MCCB of furnish operating mechanism. (Applicable MCCB type: AM3-250 AM3-800) (MCCB) is "OFF" position when the locked device operated may avoid making of MCCB. It's rational three-unit padlock of diameter 6mm (user provide for oneself). It's selection under following. 2. One "OFF" position lock, two or more than two, "OFF" position lock of MCCB (MCCB group use the same kind key).Apart from ABB MCCB, the Merlin Gerlin MCCB, MEM MCCB, HAGER MCCB, DORMAN MCCB, SIEMENS MCCB, TERASAKI MCCB, LEGRAND MCCB are available to us. Specification TypePole numberRated insulating voltage(V)Rated operating voltage(V)Ultimate short circuitbreaking capacity Icu(KA)Rated short-circuitserrice breakingcapocity Ics(%icu)Utilization categoryAC380V(400)AC660V(690)AM3-125L1,2,3,450050025-50%AAM3-160L3,4690690 and below35875%AM3-160M501075%AM3-250L8003514100%AM3-250M651875%AM3-250H852075%AM3-400L3518100%AM3-400M6522100%AM3-400H1003075%AM3-630L3520100%AM3-630M5022100%AM3-630H6525100%AM3-800L3520100%AM3-800M5022100%AM3-800H6525100%AM3-1250/1600L35020100%