The ABB E3S2000 is a high‑capacity low‑voltage air circuit breaker from ABB’s SACE Emax E3 series designed for the protection and switching of electrical power distribution and industrial systems. These breakers provide reliable overcurrent and short‑circuit protection for three‑phase power circuits up to 2000 A. The unit is suitable for industrial, commercial, and utility applications where robust fault protection and selective coordination are required.