The 1000 A frame is the continuous current at 40 °C; derate to 960 A at 55 °C and 900 A at 70 °C if the enclosure runs hot. The interrupting ratings climb from 187 kA at 240 V down to 52.5 kA at 690 V, so the breaker handles high available fault current on the secondary side of a step-down transformer without needing a current-limiting fuse upstream.
Auxiliary switches and undervoltage release — what is wired in
The trip alarm switch changes state only on a fault trip, not on manual open, which simplifies remote fault annunciation.
Integration notes — panel fit and thermal management
The breaker footprint is 210 mm wide by 320 mm tall by 120 mm deep — a standard 3-pole MCCB form factor for a 1000 A frame. Mounts on a backplate or DIN-rail adapter; the 120 mm depth leaves room behind the panel door for cable lugs and busbar connections. At full load the breaker dissipates up to 332.5 W — account for that heat in the enclosure sizing and ventilation, especially if the panel also houses drives or transformers.
Rated insulation voltage and what it governs
That covers 480 V, 600 V, and 690 V distribution without derating the insulation. The interrupting ratings at 690 V (52.5 kA) confirm it is usable on 690 V industrial grids, not just 400/480 V.