Three-phase electric energy meter SFM472

DIN railmulti-function

Product Overview
The SFM472 series three-phase multifunction DIN-rail meter is an electrical monitoring device designed for three-phase four-wire (3P4W) power systems. Intended for commercial, industrial and utility applications, the meter provides precise real-time measurement of multiple power parameters and supports integration into energy management and monitoring systems.

Core Measurement Capabilities

• Voltage: Line-to-line (L1-L2, L1-L3, L2-L3) and line-to-neutral (L1-N, L2-N, L3-N) RMS voltage
• Current: RMS current measurement for each phase
• Power: Active, reactive and apparent power (per phase and total)
• Frequency: Grid frequency (50/60 Hz)
• Energy: Import (consumed) and export (fed-back) active and reactive energy with cumulative metering

System Integration & Application Flexibility
The meter supports local display for on-site readout via an on-board LCD and centralized integration through RS485 using Modbus RTU. It is suitable for connection to PLCs, RTUs, SCADA systems and host computers for remote acquisition, load analysis, energy audits and automated power management.

Technical Parameters
Input - Voltage: Voltage (Un): 3*57.7/100…240/415 VAC
Input - Voltage range: 0.8Un - 1.15Un
Input - Current: direct connection: 0.25-5(80) A; Overcurrent withstand: 30 Imax for 0.01 s
Frequency: 50 / 60 Hz
Wiring: Connecting capacity: 16 to 25 mm2
Display: LCD with white back-light; Max reading: 999999 kWh
Accuracy: Active energy: Class 1, Class B
Output - Communication: Interface: RS485; Protocol: Modbus RTU
Pulse: Pulse constant: 800 imp/kWh
Power consumption: < 2 W / 10 VA
Withstand - AC voltage: 4 kV / 1 min
Withstand - DC impulse: 6 kV - 1.2 µs waveform
Climate environment - Operating temperature: -25 °C ~ +55 °C; Storage temperature: -40 °C ~ +70 °C
Humidity: ≤ 95% non-condensing, no corrosive gas
Altitude: ≤ 2000 m
Mechanical environment: M1
Electromagnetic environment: E2

Specifications

• Model/Series: SFM472 Series
• Application: Three-phase four-wire (3P4W) power monitoring
• Voltage rating: 3*57.7/100…240/415 VAC; operating range 0.8Un - 1.15Un
• Current rating: direct 0.25-5(80) A; overcurrent withstand 30 Imax for 0.01 s
• Frequency: 50/60 Hz
• Display: LCD with white back-light, max reading 999999 kWh
• Energy accuracy: Active energy Class 1 / Class B
• Communication: RS485, Modbus RTU
• Pulse constant: 800 imp/kWh
• Power consumption: < 2 W / 10 VA
• Electrical withstand: AC 4 kV/1 min; DC impulse 6 kV (1.2 µs)
• Operating temperature: -25 °C to +55 °C; Storage: -40 °C to +70 °C
• Humidity: ≤ 95% non-condensing
• Altitude rating: ≤ 2000 m
• Mechanical / Electromagnetic environment: M1 / E2