The Schneider Electric ENW24150 is an EasyPact NW air circuit breaker rated for 1000 A at 40 °C, with a breaking capacity of 66 kA Icu at 220...440 V AC 50/60 Hz per IEC 60947-2. It is a 4-pole drawout unit with rear connections, designed for distribution applications in industrial switchboards.
The H breaking capacity code (66 kA Icu at 440 V) positions this breaker for high-fault installations where upstream coordination demands a robust interrupting rating. At 690 V the Icu and Ics both drop to 50 kA, still adequate for most 690 V distribution boards.
Drawout mounting on a rail support with a 115 mm connection pitch (without spreader). Rear horizontal or vertical connection positions. Neutral on the left. Pollution degree 4 per IEC 60664-1 — suitable for harsh industrial environments with conductive pollution. IP40 enclosure protection; install in a switchboard with a higher overall IP rating if washdown or dust ingress is a concern.
Electrical endurance and duty
Category B utilisation (selective coordination capable). Electrical durability: 6000 cycles at 440 V AC without maintenance, 4000 cycles at 690 V AC. Mechanical durability: 20000 cycles with maintenance, 10000 without. Maximum breaking time 25 ms, closing response 70 ms. Suitability for isolation confirmed per IEC 60947-2 — the contact position indicator gives visual confirmation of open contacts.