What the 3200 A rating means for the switchboard
The ENW22347 is a 3-pole EasyPact NW chassis rated 3200 A at 40 °C, with breaking capacity code H. That 3200 A continuous rating is the current it carries without exceeding the 40 °C ambient limit — derate above that temperature per the manufacturer's curve. The H breaking capacity code tells you the fault-interruption capability for this frame; it's the figure you coordinate with upstream protection for selective tripping in a low-voltage main switchboard.