The Schneider Electric LV847280WW is a MicroLogic 2.0 Xi electronic control unit for the MasterPacT range of air circuit breakers. It provides LI protection (long-time and instantaneous short-circuit) and integrates a power meter with a 128 x 96 pixel LCD display. It supports a wide range of trip unit ratings from 400 A up to 6300 A, making it suitable for large distribution feeders and main incomers in industrial and commercial power systems.
Poles and protection configuration
The LV847280WW is listed for 4P 3d and 3P configurations, with protected poles options including 4P 3d, 4P 3d + N/2, 4P 4d, and 4P 3d + OSN. The neutral protection setting is adjustable to 1 x Ir, 0.5 x Ir, 1.6 x Ir, or no protection, depending on the pole configuration selected. This flexibility allows the control unit to be matched to the system grounding and neutral requirements — solidly grounded, impedance-grounded, or ungrounded delta — without requiring a separate neutral CT or relay.
Metering and accuracy
The built-in power meter measures current (I1, I2, I3, Iavg, IN RMS, Ig RMS), voltage (phase-to-phase and phase-to-neutral), active/reactive/apparent power, energy, power factor, frequency, harmonics, and unbalance. Accuracy is class 0.5 for voltage and unbalance voltage, class 1 for active energy, and class 2 for voltage THD. Measurement voltage range is 208-828 V AC phase-to-phase and 120-480 V AC phase-to-neutral, covering standard low-voltage distribution networks up to 690 V class. Frequency measurement spans 40-70 Hz.
The LV847280WW is certified to EN/IEC 60947-2 (circuit-breakers), EN/IEC 60092-202 (marine), EN/IEC 60947-1, EN/IEC 60255-1 (measuring relays), and EN/IEC 61010-1 (safety). Overvoltage category is IV per IEC 61010-1, suitable for main service entrance applications. Operating altitude is up to 5000 m with voltage derating to 560 V AC above 2000 m. Relative humidity tolerance is 95% at 55°C per IEC 60068-2-30 (damp heat cyclic). Indoor use only; not approved for wet locations per IEC 61010-1.