What this 4000 A drawout breaker is for
The Schneider Electric EVS40H3MW20 is a 3-pole drawout air circuit breaker from the EasyPact EVS family, rated 4000 A continuous at 40 °C and carrying a 65 kA Icu breaking capacity at 220–440 V AC (50/60 Hz) per IEC 60947-2. The drawout cradle lets you rack the breaker out for maintenance or replacement without disturbing the rear-connected power conductors, which is the standard arrangement for switchgear lineups in industrial distribution.
Trip unit and protection — LI curve, thermal memory, 25 ms clearing
The EVS Trip System2.0 is an electronic LI (long-time + instantaneous) unit. Long-time overload protection follows an I²t curve you can adjust for the load profile; instantaneous short-circuit protection clears in a maximum 25 ms. That 25 ms is the total break time — arcing plus mechanical opening — which is fast enough to limit let-through energy for downstream components. That matters for motor circuits or repeated inrush loads where nuisance tripping on a second start is a real risk.
Mounting and integration — drawout cradle, rear connection, IP40
Mounts in a drawout cradle on a rail base plate; connection pitch is 115 mm without a spreader. Rear connection (vertical or horizontal orientation) mates to the switchgear bus. Pollution degree 4 per IEC 60664-1 means the insulation system is rated for continuous conductive contamination (dust, condensation), which is the typical environment in cement plants, steel mills, and heavy industrial substations.
Durability and duty — Category B, 5000 electrical cycles without maintenance
Electrical durability is 5000 cycles at rated voltage without maintenance; mechanical durability is 20000 cycles with maintenance, 10000 without.