ComPacT NS800N basic frame — what you're sourcing
It carries an 800 A rated current at 50 °C across 4 poles, with a withdrawable (drawout) mounting style and manual operation. The breaking capacity hits 85 kA Icu at 220/240 V AC and 50 kA Icu at 380/415 V AC, both per IEC 60947-2.
The 800 A rating at 50 °C means this frame is sized for a main or heavy feeder in a 480 V or 400 V distribution board — think a 500 kVA transformer secondary or a large motor control center bus. Withdrawable mounting means the chassis pulls out for inspection or swap without unbolting bus bars — a real time-saver on a live panel if the line's down and you need to rack in a spare. The frame is isolation-rated per EN/IEC 60947-2 — it provides visible isolation when racked out, which satisfies lockout/tagout requirements without a separate disconnect switch.
Mounts on a backplate with a 70 mm connection pitch. The 306 mm width, 260 mm height, and 147 mm depth are the envelope for the drawout chassis — make sure your cabinet has enough depth for the racking mechanism and clearance for the manual operator on the front face. Neutral is on the left, which matters if your bus bar layout is handed. The 30 W power loss is continuous at rated current — factor that into your enclosure ventilation calculation to keep ambient below the 70 °C operating max.