It's a 4-pole unit rated 240 A at 40 °C, built for special applications—think process lines where you need adjustable protection curves, not just a thermal-magnetic snap.
What the protection ratings mean for your line
The trip unit uses an electronic core with LSoI protection: long-time (L) overload, short-time (So) short-circuit with a fixed delay, and instantaneous (I) short-circuit. The long-time pickup (Ir) is adjustable from 140 to 240 A, so you can fine-tune the overload threshold to match your continuous load without swapping hardware. Short-time pickup (Isd) adjusts from 1.5 to 10 times Ir across nine settings—that's the selectivity knob for coordinating with downstream breakers. Instantaneous pickup is fixed at 2880 A, which clears hard faults fast. This matters on motor circuits or welding lines where the load cycles hard.
That means it's tested for breaking capacity, temperature rise, and coordination under fault conditions. IP40 protection on the unit itself keeps fingers and tools out, but the breaker's enclosure determines the overall ingress rating.