The Schneider Electric LV846177 is a MasterPact MTZ2 drawout circuit breaker, 3 poles, rated 4000 A at 40 °C. It belongs to the MasterPacT range and carries the performance designation H2V — 100 kA ultimate breaking capacity (Icu) at 415 V AC, with a corresponding service breaking capacity (Ics) of 100 kA at 440 V AC. That means it clears a fault up to 100 kA and is immediately ready to reclose after the event, per EN/IEC 60947-2 Category B selectivity. Rated operational voltage is 440 V AC 50/60 Hz, with an insulation voltage (Ui) of 1000 V AC and impulse withstand (Uimp) of 12 kV. Short-time withstand current (Icw) is 100 kA for 1 s, 75 kA for 3 s — figures that govern coordination with downstream devices in a selective system.
Drawout mounting on rails or base plate. Connection pitch is 115 mm. Upside and downside connections both accept front or rear termination. Dimensions: width 441 mm, height 439 mm, depth 403 mm. IP30 front face protection per EN 60529 — suitable for enclosed switchgear assemblies where the breaker is behind a closed door. Altitude derating applies above 2000 m.
Performance and durability
Electrical durability: 5000 cycles at 440 V AC 50/60 Hz at In per EN/IEC 60947-2 AC-23A, and 6000 cycles per EN/IEC 60947-3 AC-3. Mechanical durability is 15000 cycles with periodic preventive maintenance. Maximum breaking time 25 ms; maximum closing response time 70 ms. Power dissipation at rated current is 900 W — factor into enclosure ventilation calculations. Sensor rating covers four tap settings: 2000 A, 2500 A, 3200 A, 4000 A, allowing the same breaker frame to be adjusted for different load levels by changing the sensor plug.