The LS/I designation means it provides long-time and short-time protection with an adjustable I²t curve, plus instantaneous pickup — the standard toolkit for feeder and main breaker duty in a 600 A frame. UL and CSA listed, so it lands in North American panels without a secondary approval chase.
The EKIP DIP LS/I trip unit gives you field-adjustable long-time pickup (Ir), short-time pickup (Isd) with a selectable I²t on/off, and instantaneous (Ii) — so it coordinates downstream with smaller MCCBs or fused switches without forcing a full selectivity study redo. UL 489 listing certifies it as a branch-circuit protective device; CSA C22.2 No. 5 covers the Canadian install base.