Key Parameters Category Description / Value Product Line Eaton NZMH (Air Circuit Breakers) Rated Current (Iₙ) 400 A Number of Poles 3-Pole or 4-Pole versions available Trip Unit Type Electronic Trip Unit (S1 type) Rated Operational Voltage (Uₑ) Up to 690 V AC, 50/60 Hz Rated Insulation Voltage (Uᵢ) 1000 V Rated Ultimate Short-Circuit Breaking Capacity (Iᶜᵘ) Very high, typically 65 kA to 100 kA at 400V AC (IEC 60947-2) Protection Functions • Long-time delay (L) • Short-time delay (S) • Instantaneous (I) • Ground-fault (G) Mounting Fixed mounting or Draw-out version available Standards Compliance IEC/EN 60947-2
