Technical Parameters Parameter Typical Specification Manufacturer ABB Series / Family SACE Emax 2 – E2.2N frame Product Type Air Circuit Breaker (ACB) Number of Poles 3 (three‑phase) Rated Continuous Current (In / Iu) Varies by model (e.g., 800 A, 1250 A, 1600 A, 2000 A, 2500 A) depending on specific variant Rated Operational Voltage (Ue) Up to 690 V AC Rated Insulation Voltage (Ui) 1000 V AC Rated Impulse Withstand Voltage (Uimp) ~12 kV Trip Unit (Protection Module) Electronic types such as Ekip Dip LI, PR121/P‑LSIG, Ekip Touch LSIG, etc. Protection Functions Long‑time overload (L), Short‑time (S), Instantaneous (I), Ground fault (G) — depending on trip unit Short‑Circuit Breaking Capacity (Icu) Typically up to ~66 kA (depending on product and settings) Service Breaking Capacity (Ics) Typically equal to Icu at distribution levels Short‑Time Withstand (Icw) High withstand for 1 s and 3 s duty Connection / Mounting Options Fixed (rear horizontal) or withdrawable (WHR/WMP) Frequency 50 / 60 Hz Standards Compliance IEC / low‑voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial and commercial switchgear