The 3-pole configuration suits three-phase systems common in industrial and commercial power distribution.
What the pole count means for fit
Three poles means this switch-disconnector simultaneously makes and breaks all three phases of a three-phase circuit. In a panel, that translates to a single handle operation that isolates the entire load — no risk of single-phasing a motor if only one pole were switched. The XT4H frame mounts on a backplate or DIN rail via the ABB mounting accessories; verify the panel cutout and busbar pitch against the XT4H drilling plan before committing the layout.