It uses an ETU330 electronic trip unit providing overload (L), instantaneous short-circuit (I), and ground-fault (G) protection. Overload pickup Ir is adjustable from 250 A to 630 A; short-circuit pickup Ii spans 1.5 to 9 times In; ground-fault pickup Ig ranges from 0.2 to 1 times In with a time delay tg selectable at 0.1 or 0.3 seconds. Breaking capacity class E delivers Icu = 200 kA at 415 V AC.
At 630 A frame size, plan for adequate lug clearance and bending radius for the incoming conductors. The ETU330 trip unit is field-adjustable for Ir, Ii, Ig, and tg; verify settings against the coordination study before energizing.