Line protection molded case circuit breaker, 1000 A frame
The breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — figures that cover high-fault utility feeds and large motor branch circuits.
Thermal derating and trip unit adjustment
Full 1 000 A rating holds up to 55 °C ambient; at 60 °C it derates to 955 A, at 65 °C to 885 A, and at 70 °C to 815 A (cites:-). The ETU320 release allows adjustable long-time pickup Ir from 400 A to 1 000 A, short-time pickup Ii from 1 500 A to 10 000 A, and time delay tr from 0.5 s to 17 s — enough range to coordinate with downstream feeders without swapping trip units.
Dimensions are 120 mm deep, 210 mm wide, 320 mm high (8.3 in × 12.6 in). The IP40 front protection suits enclosed panel mounting — not washdown environments.
Listed as current production (cites:). No LTB windows or successor part numbers have been issued.