Rated In=320 A with a TM240 thermal-magnetic trip unit; overload protection adjustable Ir=224…320 A, short-circuit pickup Ii=5…10 x In. That adjustable thermal band lets you fine-tune the continuous-current setting to the actual load, not just the breaker frame.
Rated for 3-pole, 3-phase line protection. The TM240 trip offers both thermal (overload) and magnetic (short-circuit) elements in one unit — no separate relay needed for basic motor or feeder protection. Adjustable Ir range covers 224 A to 320 A, so the same breaker can be dialed for a 250 A feeder today and re-tasked for a 315 A load next year.
Factory-fitted with 2 auxiliary switch changeover contacts (H type) and 1 trip alarm switch changeover. Nut keeper kit included for secure mounting in the switchboard.