Switch disconnector, 2500 A, 4 poles — EasyPact NW
The Schneider Electric ENW24218 is a 4-pole switch disconnector from the EasyPact NW range, rated 2500 A in AC-23A utilisation category at 690 V AC. That AC-23A duty covers switching motor loads and other highly inductive circuits — not just resistive heating — so the 2500 A figure is the real motor-switching current, not a derated resistive number. The H breaking capacity code and the 143 kA rated short-circuit making capacity (Icm) tell you this unit can close onto a fault without welding contacts, which matters for distribution incoming or generator coupling where fault levels are high. It's a drawout design on a rail mount, with rear vertical or horizontal connection positions and a 115 mm connection pitch without spreader. The neutral sits on the left. That drawout format means the switching element can be racked out for maintenance or replacement without disturbing the main bus connections — a standard requirement for switchgear where uptime matters.
Withstand and isolation — what the ratings mean
Rated short-time withstand current (Icw) is 66 kA for 1 second or 36 kA for 3 seconds, per IEC 60947-3. That's the current the disconnector can carry without damage during a fault — the 3-second figure is useful for coordination studies where upstream protection has a delayed trip. Rated insulation voltage (Ui) is 1000 V AC, and impulse withstand (Uimp) is 12 kV, so it's comfortable in 690 V systems with typical surge environments. Electrical durability is 5000 cycles at 440 V and 2500 cycles at 690 V without maintenance; mechanical durability is 20000 cycles with maintenance, 10000 without. That's typical for a high-current drawout disconnector — the maintenance interval is the planning point for a PM schedule.