The Schneider Electric LV848228 is a MasterPact MTZ2 drawout circuit breaker, 4-pole, rated 1250 A at 40 °C with H1 performance class delivering 66 kA Ics across the full voltage range from 220/415 V AC up to 660/690 V AC. The making capacity (Icm) hits 145 kA, which covers the asymmetric peak current during the first half-cycle of a bolted fault. Selectivity category B confirms full discrimination with downstream devices, critical for maintaining power to unaffected feeders in a distribution panel. The short-time withstand (Icw) is 66 kA for 0.5 s and 1 s, dropping to 36 kA at 3 s. That sustained rating matters for coordinated selective tripping — the breaker holds closed long enough for a downstream device to clear a fault, avoiding a full bus shutdown. Maximum breaking time is 25 ms, closing response 70 ms. Electrical durability is 10,000 cycles at 440 V and 690 V AC under EN/IEC 60947-2; mechanical durability is 25,000 cycles with periodic preventive maintenance.
Drawout mounting means the breaker chassis stays wired in the switchgear; the moving portion racks out for inspection or replacement without disturbing the power connections. The frame accepts sensor ratings of 630 A, 800 A, 1000 A, or 1250 A, so the same cradle can be re-sensored for a different load without swapping the entire breaker. Connection pitch is 115 mm; both front and rear connection options are available. Mounting support is rails or base plate. IP30 protection is standard for indoor switchgear — the enclosure or cell provides the higher ingress rating.
Annex H covers electromagnetic compatibility for circuit breakers — important for installations subject to IEC 61557-12 power system monitoring. Altitude rating is 0–2000 m without derating, 2000–5000 m with derating.