It is fitted with an ETU320 electronic overcurrent release configured for LI protection — meaning it provides long-time delay (L) and instantaneous (I) fault response, with no ground-fault monitoring. This is the part you spec for a main feeder or large subfeed in a 400 V to 690 V distribution panel where you need adjustable pickup and time bands to coordinate with downstream breakers. The breaking capacity is substantial: 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V.
At 60 °C it derates to 955 A, at 65 °C to 885 A, and at 70 °C to 815 A.
Trip unit adjustability
The ETU320 release gives you an adjustable long-time pickup (Ir) from 1000 A minimum, and instantaneous pickup (Ii) adjustable from 1500 A to 10 000 A. The long-time delay tr is settable between 0.5 and 17 seconds. That range lets you shape the trip curve to ride through motor-start inrush or transformer magnetizing current while still clearing a bolted fault fast.
Dimensions are 210 mm wide × 320 mm high × 120 mm deep.