The Schneider Electric Masterpact NSX250 is a high-performance, four-pole, 250A molded case circuit breaker (MCCB) from the flagship Masterpact NSX range.
Parameter Value / Description
Product Line / Frame Size Masterpact NSX250
Rated Current (In) 250 A (Fully adjustable via the installed electronic trip unit).
Number of Poles 4 (L1, L2, L3, N)
Breaking Capacity [Must be Specified] – N (~50 kA), S (~70 kA), H (~100 kA), L (~150 kA) Icu at 415V AC.
Rated Ultimate Breaking Capacity (Icu) Depends on selected rating (see above).
Rated Operational Voltage (Ue) Up to 690 V AC
Trip Unit (Must be Specified) Electronic Micrologic Only. Comprehensive range:
• Micrologic 2.2: Basic protection (LSI) with display.
• Micrologic 5.2/6.2: Adds ground fault (G) protection.
• Micrologic 5.2E/6.2E/7.0A: Adds advanced measurement & communication.
Communication Native in Micrologic “E” and “A” series. Supports Ethernet, Modbus TCP for integration into EcoStruxure Power.
Standard IEC 60947-2
Mounting Withdrawable (standard) or Fixed.
Neutral Configuration Usually 4P4D (all 4 poles protected) or 4P3D (neutral switched only).
Width (Withdrawable 4P) Approx. 220 mm