The manual explains functions, installation, wiring, operation and maintenance of the single‑circuit AC power monitoring device UM03‑ARA3 (and UM03‑ARA3G).
The Fuji UM03‑ARA3 is a single‑circuit AC power monitoring unit that measures voltage, current, power, energy, harmonics, power factor and, in the G version, leakage current. It can be installed in three‑phase three‑wire, single‑phase three‑wire or single‑phase two‑wire power systems and supports RS‑485 communication for integration with higher‑level controllers.
This user manual provides safety warnings, a list of accessories, detailed wiring diagrams, installation steps, specifications, operating procedures, fault diagnostics, maintenance guidelines and reference tables for setting parameters and communication options. This manual is written in Chinese.
| Detection circuit count | 1 circuit |
|---|---|
| Control power input voltage | AC100–200V (AC85–264V) |
| Power consumption | ≈7 VA at 220 V, ≈5 VA at 110 V |
| Maximum detectable current | 7500 A |
| RS‑485 transmission speed options | 4,800 / 9,600 / 19,200 bps |
| Weight (main unit only) | ≈400 g |
It operates on AC100–200 V (acceptable range AC85–264 V).
It can monitor a single power circuit.