Technical Parameters Parameter Specification Manufacturer ABB Series / Family SACE Emax 2 – E2.2N Product Type Air Circuit Breaker (ACB) Number of Poles 3 (three‑phase) Rated Continuous Current (In / Iu) Available in multiple ratings (e.g., 800 A, 1250 A, 1600 A, 2000 A, 2500 A) Rated Operational Voltage (Ue) Up to ~690 V AC Rated Insulation Voltage (Ui) ~1000 V AC Rated Impulse Withstand Voltage (Uimp) ~12 kV Short‑Circuit Breaking Capacity (Icu) High interrupting capability (commonly ~66 kA across typical low‑voltage levels) Service Short‑Circuit Breaking Capacity (Ics) Service capacity matching breaking capacity at distribution levels Short‑Time Withstand Current (Icw) Withstand levels for durations such as 1 s and 3 s duty Protection Modules Compatible with electronic trip units such as Dip LI, Dip LSI, LSIG, Touch LSIG, etc. Trip Functions (when equipped) Long‑time (L), Short‑time (S), Instantaneous (I), and optionally Ground fault (G) depending on trip unit Connection Type Fixed rear horizontal or withdrawable mounting possible Rated Frequency 50 / 60 Hz Standards Compliance IEC low‑voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial and commercial switchgear