Specifications General Product Type: Molded Case Circuit Breaker (MCCB) Series / Family: NSC S‑Frame Number of Poles: 3 (three phases) Rated Current (In): 250 A Mounting Type: Fixed panel or distribution board installation Application: Protection of low‑voltage three‑phase electrical circuits Electrical Ratings Rated Operational Voltage (Ue): Designed for low‑voltage AC systems (typically up to ~690 V AC) Rated Frequency: 50/60 Hz Rated Insulation Voltage (Ui): Appropriate for standard low‑voltage distribution systems Rated Impulse Withstand Voltage (Uimp): Designed to withstand typical transient overvoltages Protection & Trip Characteristics Trip Mechanism: Thermal‑magnetic trip unit Overload Protection: Thermal element responds to prolonged overload currents Short‑Circuit Protection: Magnetic element responds to high fault current events Tripping Behavior: Combined thermal and magnetic action for dependable circuit interruption Breaking Capacity & Performance Breaking Capacity: Engineered to safely interrupt fault currents typically encountered in low‑voltage power distribution systems Performance: Reliable fault clearing to protect circuits, wiring, and connected equipment Mechanical & Environmental Terminal Connections: Screw or clamp type terminals for secure conductor attachment Mechanical Durability: Built for dependable performance over repeated switching operations Design: Compact modular housing suitable for panelboard and switchboard integration Operating Environment: Indoor electrical distribution boards and switchgear