Technical Parameters Parameter Specification Manufacturer ABB Series / Family Emax E4S Product Type Low-voltage Air Circuit Breaker (ACB) Model E4S3200 Number of Poles 3‑pole (three-phase) Rated Continuous Current (In) 3200 A Trip Unit Compatibility PR121/P‑LI, PR121/P‑LSIG, or equivalent electronic overcurrent units Protection Functions (with trip unit) L – Long-time overload S – Short-time delay overcurrent I – Instantaneous short-circuit G – Ground fault (optional, depending on trip unit) 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 capacity suitable for industrial low-voltage networks Service Short-Circuit Breaking Capacity (Ics) Rated service capacity matching Icu Short-Time Withstand Current (Icw) High withstand for 1 s / 3 s durations Rated Frequency 50 / 60 Hz Mounting / Connection Fixed Horizontal Rear (FHR), Withdrawable Horizontal Rear (WHR), depending on frame Standards Compliance IEC low-voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial or commercial switchgear