The Schneider Electric ENW24157 is a fixed-mount EasyPact NW air circuit breaker rated 800 A at 40 °C, built for distribution duty in industrial switchboards. It carries a 66 kA Icu at 220...440 V AC and 50 kA Icu at 690 V AC, both per IEC 60947-2, so it clears high fault currents without upstream coordination issues. The 4-pole design with left-side neutral and rear vertical/horizontal connections suits main or tie-breaker positions in low-voltage switchgear.
That 65 kA Ics / 66 kA Icu ratio (98 %) is high, typical of Category B breakers that are expected to remain in service after a fault. The 690 V operational voltage (Ue) and 1000 V insulation voltage (Ui) confirm it handles 690 V line-to-line systems common in heavy industrial plants.
Fixed mount on a base plate — no DIN rail, so panel cutouts and bolt patterns need to match the 537 mm width, 352 mm height, and 297 mm depth. Rear connection with a 115 mm connection pitch without spreader means busbar or cable terminations must follow that spacing. IP40 enclosure protection keeps out tools and fingers but not water; install inside a switchboard or enclosure rated for the environment. Pollution degree 4 per IEC 60664-1 means the breaker is designed for continuous conductive contamination (dust, condensation) — typical for unsealed industrial switchgear rooms.
Certified to IEC 60947-2 for low-voltage switchgear and controlgear. Isolation suitable per that standard — the breaker provides visible isolation when open. Pollution degree 4, ambient operation from -5 to 60 °C, storage from -40 to 85 °C. The 4 protected poles (4P 4d) with selectable neutral protection (no protection, 0.5× Ir, or 1× Ir) cover solidly-grounded and impedance-grounded systems.