POWER QUALITY MEASUREMENT
3-Phase Energy Monitoring & Load Control
Industrial-grade 480VAC energy metering and scheduled load control for heavy industry — with flexible Wi-Fi, cellular, MODBUS, or power line communications.
ARG INSTRUMENTS
The PM3 measures active, reactive, and apparent power, RMS current and voltage, power factor, line frequency, and cumulative energy across up to three 480VAC phases — with 0.1% accuracy across a 4000:1 dynamic range. Add contactor control and you have a complete energy management node.
BUILT FOR INDUSTRY
From the meter to the cloud — measurement, control, communications, and security in one DIN rail module.
0.1% accurate across a 4000:1 dynamic range. Active, reactive, and apparent power. RMS voltage and current. Power factor, line frequency, and cumulative energy.
Wi-Fi 6 (2.4/5GHz), MODBUS TCP/IP, Cellular LTE-M with Onomondo eSIM, or Hybrid Power Line & RF mesh. One protocol selected at order — no network installer required.
External contactor control up to 600VAC / 1.2A, independent of line voltage. Built-in RTC with 48-hour power backup. Non-volatile load schedule storage.
EAP-PSK with 256-bit ECC encryption, configured at the factory. TLS/SSL for all cloud and on-premises connections. Only whitelisted nodes can join the network.
SPECIFICATIONS
| Technical Specifications | |
|---|---|
| Voltage Input | 80–480VAC, 1–3 phase (L-L or L-N), 50/60Hz |
| Metering Accuracy | 0.1% across a 4000:1 dynamic range |
| Measured Parameters | Active, reactive & apparent power; RMS voltage & current; power factor; line frequency; cumulative energy |
| Current Input | External CT connection (1–3 CTs) via cage clamp terminals |
| Reporting Interval | 1 second to 1 day (configurable); local storage when offline, auto-sync on reconnect |
| Load Control | External contactor: 80–600VAC coil, 1.2A max, independent of line voltage |
| Real-Time Clock | On-board RTC with 48-hour power backup; non-volatile schedule storage |
| Communication | Wi-Fi 6 (2.4/5GHz, 802.11ax, Matter) — or — MODBUS TCP/IP (57.6–230.4 kbps) — or — Cellular LTE-M/NB-IoT (Onomondo eSIM) — or — Hybrid PLC+RF (CENELEC-B, auto-mesh) |
| Security | EAP-PSK, 256-bit ECC (factory-configured); TLS/SSL cloud & on-premises |
| Power Consumption | 3.5W active / <0.25W standby; OVP Cat II, EN55022 Class B |
| Dimensions | 2.66 × 2.95 × 4.21 in (68 × 75 × 107 mm) |
| Mounting | 35mm DIN rail |
| Operating Temperature | -40°C to +85°C |
APPLICATIONS
The PM3 connects industrial energy data to wherever you need it — cloud dashboards, SCADA systems, or local BMS.
Monitor and report energy consumption across multi-phase 480VAC industrial loads.
Automate load shedding and scheduled switching without a separate PLC.
Deploy in locations without network infrastructure using cellular or PLC mesh.
Get pricing for single units, volume orders, and OEM integration into your energy management system.