The ABB E1N800 D‑LSI 3‑pole WHR Air Circuit Breaker is a low‑voltage protective device from ABB’s Emax E1N series, designed for three‑phase industrial and commercial power distribution systems. It incorporates an electronic D‑LSI overcurrent trip unit, which provides adjustable protection against overloads (L), short‑time faults (S), instantaneous short‑circuit conditions (I), and ground faults (G). The breaker is configured in a withdrawable horizontal rear (WHR) design, allowing easy extraction from switchgear for maintenance or servicing without disconnecting the main busbars. This model is suitable for use as a main distribution breaker or feeder breaker in electrical switchgear and distribution panels.
