Parameter Category Specification General Information Product Series Eaton R Series (RKZ / RKZM0 Line) Article Number / Model RKZM0-12 Device Type Motor Protection Circuit Breaker (MPCB), Manual Motor Starter Standards IEC/EN 60947-1, IEC/EN 60947-2, IEC/EN 60947-4-1, UL 508, CSA Poles & Protection Number of Poles 3-Pole (for protecting all three phases of a motor) Protection Functions • Thermal Overload Protection (Inverse Time Delay) • Magnetic Short-Circuit Protection (Instantaneous) Current Settings Rated Operational Current (Ie) 12 A (This is the adjustable overload current setting, corresponding to the motor's Full Load Current - FLC). Adjustable Overload Range 0.11 - 1.0 x In (of the trip unit) For this model, the trip unit's nominal current (In) is likely 12.5A or 16A, making the adjustable range approximately 1.4 A to 12 A. Magnetic Trip Setting (Short-Circuit) Fixed, typically 10 x Ie to 15 x Ie (e.g., trips at 120A to 180A for the 12A setting). Electrical Ratings Rated Insulation Voltage (Ui) 690 V AC Rated Operational Voltage (Ue) 400/415 V AC, 50/60 Hz (for AC-3 motor duty) Utilization Category AC-3 (Squirrel-cage motor starting and stopping) Rated Conditional Short-Circuit Current (Icq) Typically 10 kA or 22 kA at 400V AC when backed by a specific upstream fuse or circuit breaker (e.g., gG/gL fuse). Rated Service Short-Circuit Breaking Capacity (Ics) Lower than Icq, e.g., 6 kA or 10 kA. Motor Power @ 400V AC, 3-Phase: ~5.5 kW (7.5 HP) (This is approximate: 5.5kW motor FLC ~ 11A) Mechanical & Operational Control Function Manual ON/OFF/RESET lever. "TRIP" position indicates a fault. Electrical Life (AC-3) > 50,000 operations at rated current Mechanical Life > 100,000 operations Ambient Temperature Compensation Yes (within specified range, -20°C to +60°C) Mounting 35 mm DIN Rail (EN 60715) Terminals Screw terminals, suitable for both solid and stranded conductors. Ambient Temperature Operation: -20°C to +60°C (Derating may apply at extremes) Storage: -40°C to +85°C Accessories Auxiliary Contacts (signal contacts to indicate ON/OFF/TRIP status) are available as separate add-on modules. Physical Approx. Dimensions (W x H x D) For a 3-pole unit: Approx. 55 x 90 x 75 mm Degree of Protection (IP) IP20 (for enclosure mounting)