The protection package is LSIV: long-time overload (ANSI 49), short-time short-circuit (ANSI 51), instantaneous short-circuit (ANSI 50), and earth-leakage (ANSI 51G). That's the full four-quadrant set — selectivity engineers will recognize the zone-selective interlocking (ZSI) built in, which lets multiple breakers in a cascade coordinate trip times without sacrificing speed on a close-in fault. It's a power meter too, not just a trip unit. Measures all three phase currents, neutral current IN RMS, ground fault current Ig RMS, phase-to-phase and phase-to-neutral voltages, active/reactive/apparent power per phase and total, power factor, frequency, energy in/out/total, demand values, and harmonic distortion (THD) for current and voltage. Accuracy on current and voltage is ±0.5% for the main channels; active energy is ±1%.
Communication and display — what you get without opening the panel
The LV848362 has a 128×96 pixel LCD display on the front. That's enough to scroll through all metered values and protection settings without a laptop. For remote access, it talks Bluetooth 4.0 LE (30 kbit/s peer-to-peer), NFC (28,800 baud), and USB (115 kbaud). No Ethernet or Modbus on this variant — that's the domain of the MicroLogic X with communication modules. The Bluetooth range is short (peer-to-peer), so you stand near the breaker face to pair with a phone or tablet running Schneider's app. Data recording includes alarm logs, min/max of instantaneous values, data logs, maintenance logs, and event logs with time stamps. Thermal memory is on — so if the breaker trips on overload and you reclose hot, the trip curve accounts for the prior heat rise. That matters for motor feeders and high-inertia loads.
This is a drawout-mounted control unit — it plugs into the MasterPacT breaker cradle. Indoor use only (pollution degree 3 per IEC 60947-1, overvoltage category IV per IEC 61010-1). Operating altitude up to 5000 m with voltage derating to 560 V AC. Relative humidity 95% at 55°C. Not approved for wet locations per IEC 61010-1, so keep it dry. Measurement voltage range is 208–828 V AC phase-to-phase, 120–480 V AC phase-to-neutral, 50/60 Hz. The rated operational voltage is 600 V AC ±10%. Frequency measurement range is 40–70 Hz. The protected poles configuration is flexible: 3P 3d, 4P 3d, 4P 3d + N/2, 4P 4d, or 4P 3d + OSN. Neutral protection setting matches: 1 x Ir for 4P 4d, 0.5 x Ir for 4P 3d + N/2, 1.6 x Ir for 4P 3d + OSN, or no protection for 4P 3d.
Standards and compliance — what the approvals mean
The LV848362 carries EN/IEC 60947-2 (low-voltage switchgear and controlgear — circuit-breakers), EN/IEC 60947-1 (general rules), EN/IEC 60092-202 (marine electrical installations — switchgear and controlgear assemblies), EN/IEC 60255-1 (measuring relays and protection equipment), and EN/IEC 61010-1 (safety requirements for electrical equipment for measurement, control, and laboratory use). Measurement category IV per IEC 61010-2-30 — that's the highest category, for equipment installed at the origin of an installation (utility connection). EMC compliance includes electrostatic discharge, electromagnetic fields, fast transients, surge 1.2/50 µs, conducted RF, and conducted/radiated emissions Class A per CISPR 22.