The ENW13217 is a 4-pole drawout circuit breaker from the Schneider Electric EasyPact NW range, rated 630 A at 40 °C and built to IEC 60947-2 for distribution duty. The 66 kA Icu at 220...440 V AC 50/60 Hz is the ultimate breaking capacity — the maximum fault current it can safely interrupt once. The 55 kA Ics service breaking capacity is the figure that matters for repeated fault clearing: it can break and then be reclosed without inspection, which is the real-world requirement for a main breaker in an industrial distribution panel. The 50 kA Icw for 1 second tells you it withstands short-time fault current for coordination with downstream devices — essential for selective tripping in a multi-level system. Rated insulation voltage is 1000 V AC, and impulse withstand is 12 kV — this breaker is designed for 440 V AC operational voltage but with headroom for systems where transient overvoltages are common. The IP30 enclosure protection is typical for a drawout breaker mounted inside a switchgear cubicle — not for outdoor or washdown locations.
Drawout mounting on a rail base plate — the breaker chassis slides into a fixed cradle, allowing safe isolation without unbolting power cables. Connection pitch is 70 mm without spreader, rear-connected, with horizontal and vertical orientation options. Neutral position is left. Dimensions: 358 mm wide, 322 mm high, 277 mm deep. The 4P 3d protected poles configuration means three poles have thermal-magnetic protection and the fourth (neutral) is switched but not protected — verify your system's neutral earthing arrangement before specifying.