Molded case breaker at 600 A — what it means for the panel
The ABB XT6HU3600EFF000XXX is a 3-pole molded case breaker rated for 600 A continuous at 600 VAC, built on the XT6H 800 A frame with an Ekip Dip LS/I electronic trip unit. The 800 A frame means the physical bus and contacts are sized for that higher current, giving thermal headroom for the 600 A setting.
This breaker lands in a main switchboard or large motor control center feeder position. The Ekip Dip LS/I trip unit supports selective coordination downstream: set the long-time pickup and delay to ride through motor starting, then let the instantaneous clear a hard fault on the branch. Panel builders will note the 3-pole format accepts standard lug kits for copper or aluminum conductors up to the frame rating.