The Schneider Electric EVS12H3MW60 is a 3-pole drawout circuit breaker from the EasyPact EVS range, rated 1250 A at 40 °C with an electronic EVS Trip System6.0 trip unit. It provides overload (long-time), instantaneous short-circuit, short-time short-circuit, and earth-fault protection — four protection functions in one device, which means a single breaker covers feeder and fault protection without needing separate relays. Breaking capacity is 65 kA Icu at 220...440 V AC 50/60 Hz per IEC 60947-2, and 50 kA Icu at 690 V AC. The 25 ms maximum breaking time means the arc is quenched in under three line cycles at 50 Hz.
IP40 protection — suitable for indoor switchgear where large solids are excluded but not sealed against moisture. Pollution degree 4 per IEC 60664-1, meaning it's rated for continuous conductive contamination (dust, condensation), typical in industrial environments without climate control.
Category B utilization (IEC 60947-2) means this breaker is designed for selective coordination — it can hold a short-time delay to let downstream breakers clear a fault first, then trip itself if the fault persists. Electrical durability is 5000 cycles at 440/690 V without maintenance; mechanical durability is 10000 cycles without maintenance, 20000 with maintenance. That's a long service life for a main breaker in a distribution board that sees infrequent switching. That's a detail that matters for motor feeders or welder circuits with repetitive overload cycles.