Specifications Parameter Specification Product Series Compact NSX Model / Frame NSX250N Number of Poles 4 Poles (3P + N) – All four poles are protected. Rated Current (In) 250 Amperes Frame Rating (Iu max) 250 A Trip Unit Type N – Standard Thermal-Magnetic (TM-D) Trip Unit Characteristics • Thermal Protection (Ir): Fixed at 250A (inverse-time). • Magnetic Protection (Im): Fixed instantaneous setting, typically ~10 x In (2500A). Breaking Capacity Suffix "2.2" Indicates a specific Icu rating. In the NSX250 range, "2.2" commonly corresponds to 50 kA @ 400V AC. This coding must be verified against the specific regional catalog. Rated Operational Voltage (Ue) 400/415V AC (3P+N systems), up to 690V AC. Rated Insulation Voltage (Ui) 1000V AC Short-Time Withstand (Icw) Typically 25-35 kA for 1s (model dependent) Connection Front or rear connection, screw terminals suitable for busbar or large cables. Terminal Capacity Suitable for copper/aluminum cables up to 2x(95-150mm²) or busbars. Mounting Fixed or Plug-in (P) version available (letter after frame indicates type, e.g., F for Fixed: NSX250F N 250A). Width (4P) ~140 mm (Thermal-Magnetic version) Mechanical Life 20,000 operations Electrical Life 8,000 operations at rated current Operating Temperature -25°C to +70°C Standards IEC 60947-2, UL 489, CCC, CE