What this 800 A drawout breaker does for your main
The ENW24101 is a Schneider Electric EasyPact NW circuit breaker on the ENW08N frame — a three-pole, 800 A drawout unit built for distribution duty. That 800 A rating at 40 °C tells you it handles full continuous current in a warm switchroom without derating; push it to 60 °C and you'll need to knock the ampacity down per the thermal curve.
Drawout mount, rear connection — panel integration
Drawout mounting means the breaker slides into a cradle, so you can rack it out for maintenance or replacement without pulling the bus bars. Rear connection keeps the power cables out of the front of the panel — cleaner layout, less clutter for the guy wiring the control transformer. The 115 mm connection pitch without spreader sets the bus spacing; if you're retrofitting into an existing lineup, measure that pitch before ordering the adapter kit. IP40 keeps tools and fingers out but isn't rated for washdown — keep it indoors.
What the standards and durability numbers mean
Compliant with IEC 60947-2, the standard for low-voltage circuit breakers — that's the spec that defines the Icu, Ics, and Icw ratings, so you know the test protocol behind the numbers. Mechanical durability is 20,000 cycles with maintenance, 10,000 without; electrical durability is 6,000 cycles at 440 V without maintenance. That's not a daily-switch duty cycle — it's a main breaker that cycles on fault or maintenance, not a contactor running every minute.