The Schneider Electric ENW24134 is an EasyPact NW 3-pole drawout circuit breaker rated 1000 A at 40 °C, with a breaking capacity of 66 kA Icu at 220...440 V AC and 50 kA Icu at 690 V AC per IEC 60947-2. It's a Category B breaker, meaning it's designed for distribution duty with full selectivity coordination — not just a feeder protection device. The drawout mounting lets you rack the breaker in and out for maintenance without unbolting the power cables, which saves time when you're swapping a unit on a live bus.
What the ratings mean in the panel
The Ics (service breaking capacity) is 65 kA at the same voltage, which is the level it can clear repeatedly without needing replacement. That 65/66 kA spread is tight, so for most distribution applications you're sizing this for full fault duty, not a derated service rating. Pollution degree 4 per IEC 60664-1 means this breaker is rated for harsh industrial environments with conductive pollution (dust, moisture, condensation). That's unusual for a standard distribution breaker — most are PD3. PD4 means you can install it in a non-climate-controlled switchroom without worrying about creepage tracking across the insulation. The IP40 enclosure keeps out tools and solid objects larger than 1 mm but isn't sealed against water, so it needs to live inside a panel or switchgear cubicle. The electrical durability figures tell you the maintenance interval: 6000 cycles at 440 V without maintenance under Category B conditions, and 4000 cycles at 690 V. For a 1000 A drawout breaker, that's a solid lifespan — you're not changing this breaker every few years in normal service. The 25 ms maximum breaking time means it clears fast enough for most coordination studies, but you still need to verify the let-through energy (I²t) against your downstream gear.
Mounting is drawout on a rail — the breaker racks into a cradle that bolts into the switchgear. Connection pitch is 115 mm without spreader, rear-connected, with both vertical and horizontal connection positions available. At 441 mm wide, 439 mm high, and 395 mm deep, this is a full-size frame that needs a dedicated cubicle compartment, not a DIN-rail slot. The control type is push-button (mechanical push-to-trip and close), so no control power required for basic operation — just the main bus.