Parameter Specification Manufacturer / Series Eaton, NZM Series Model Designation NZM4-XR Product Type Drawout Mounted Air Circuit Breaker (ACB) Mounting Style Drawout (Can be racked in/out) Frame Size NZM4 Frame Rated Current (In) Up to 3200 A or 4000 A (Depending on specific configuration) Rated Operational Voltage (Ue) 690V AC Rated Insulation Voltage (Ui) 1000V AC Breaking Capacity (Icu/Ics) Extra High (e.g., 100 kA, 120 kA, or 150 kA at 415V AC). This is the defining feature of the "XR" version and must be verified from the datasheet. Trip Unit Electronic Trip Unit (e.g., PR221, PR222, PR223 series) Protection Functions Adjustable L-S-I-G (Long-Time, Short-Time, Instantaneous, Ground Fault) Standards Compliance IEC 60947-2
