The Schneider Electric LV847287WW is a MicroLogic 7.0 Xi control unit for MasterPacT circuit breakers. It's the brain of the breaker — handling protection, metering, and communication in one package. This is the wired-control variant with an LCD display (128 x 96 pixels) that shows current, voltage, power, energy, harmonics, and event logs. The trip unit ratings span 400 A through 3200 A, so it fits a wide range of distribution frames.
Protection and metering depth
Protection functions are LSIV: long-time overload (ANSI 49), short-time short-circuit (ANSI 51), instantaneous short-circuit (ANSI 50), and earth-leakage (ANSI 51G). The earth-leakage path is built in — no external module needed. Thermal memory is included, so the trip curve accounts for prior heating when re-closing after a fault. That matters for motor and transformer feeders where repeated overloads degrade insulation before the next trip. Metering accuracy is class 1 for active energy, class 0.5 for voltage, and class 5 for current THD. Voltage measurement covers 208-828 V phase-to-phase and 120-480 V phase-to-neutral at 50/60 Hz. The unit logs min/max values, event and alarm logs, and time-stamped data — useful for post-event analysis without a separate power monitor.
Standards and deployment context
Rated to IEC 60947-2 (circuit breakers), IEC 61010-1 (measurement equipment), and IEC 60092-202 (marine electrical systems). Overvoltage category IV and pollution degree 3 — it's designed for main distribution panels, not just sub-feeds. Indoor use only; not approved for wet locations. Operating altitude up to 5000 m with voltage derating to 560 V AC above 2000 m. EMC compliance covers IEC 61000-4-2 through -4-6 (ESD, radiated, fast transient, surge, conducted RF) and CISPR 22 Class A conducted and radiated emissions.