The Schneider Electric ENW22293 is the drawout chassis for an EasyPact NW air circuit breaker rated 800 A at 40 °C, three poles, with N-level breaking capacity. This is the fixed frame that receives the breaker cradle — the part that bolts into the switchgear cubicle and carries the main power connections. The 445 mm depth, 400 mm width, and 440 mm height define the cutout and mounting footprint for the panel builder.
Drawout mounting means the breaker mechanism slides into this chassis on rails, allowing the moving portion to be racked in or out for maintenance without unbolting power cables. The chassis itself is a fixed installation — bolt it into the cubicle frame, land the busbars and control wiring on its terminals, then insert the breaker cradle. The 400 mm width and 440 mm height fit standard low-voltage switchgear compartment sizes; the 445 mm depth accounts for the rear connection space and arc chute clearance behind the panel door.
In a typical 35 °C switchroom this gives headroom; above 40 °C the assembly must be derated per the manufacturer's curve. For higher fault levels (H or L codes) a different chassis variant is needed.