Switch disconnector for distribution, 2500 A AC-23A
The Schneider Electric ENW24178 is a fixed-mount switch disconnector in the EasyPact NW range, rated 2500 A in AC-23A utilisation category at 690 V AC 50/60 Hz. That AC-23A rating means it handles switching of motor loads and other highly inductive circuits — not just resistive break — with a making capacity of 105 kA peak and a short-time withstand of 50 kA for 1 s. Three poles, rear-connected, with a vertical or horizontal connection position.
The 2500 A continuous rating sets the maximum load current the switch can carry without exceeding temperature limits — sized for a main feeder or large distribution bus. The AC-23A duty classification confirms it is rated for switching motor loads, not just passive circuits; the 5000-cycle electrical durability at 440 V and 2500 cycles at 690 V give a realistic service life under those inductive loads. The 50 kA short-time withstand for 1 s and 105 kA making capacity define the fault-handling capability — critical for selectivity studies and SCCR compliance in a panel. Rated insulation voltage of 1000 V and impulse withstand of 12 kV cover 690 V line-to-line systems with margin for transient overvoltages.
Switch disconnectors of this class serve as the main incoming isolation point in low-voltage distribution boards, motor control centres, and industrial power panels. The suitability-for-isolation marking confirms it provides visible-break isolation per IEC 60947-3 — required for lockout/tagout procedures during maintenance.