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Three phase power sensor

3-phase power-sensor

Model number: PM3-E-D
Connect to: RDC Charger
RS485 power sensor bus
A - B
Mounting: DIN rail
Used for measuring power and energy of
single/three-phase energy sources
single/three-phase energy consumers


  • Digital multi-function power sensor for single/three phase networks


  • DIN rail mounting
  • Three Phase 100A Direct Fed
  • Accuracy Class 0.5 (Active Energy)
  • Bi-directlonal Measurement for kW and kWh
  • Configurable Pulsed output (Import/ Export/Nett kWh)
  • Line Frequency
  • Power, maximum power demand and power factor
  • Active energy imported and exported
  • Reactive energy imported and exported
  • Supported Modbus

General description

PM3-E-D measures and displays the characteristics of 1p2w, 3p3w and 3p4w supplies, including voltage, frequency, current, power, active and reactive energy, imported or exported, harmonic etc. Bi-directional measurement makes it an ideal choice for Solar PV measurement. The units support Max. 100A direct connection, saving the cost and avoiding the trouble to connect external CTs. Two pulse outputs and 1 communication port (Modbus) are provided for remote monitoring. The unit has been approved to meet the requirements of EU Directive 2014/32/EU.

Technical specifications

Technical Data
Operating Humidity ≤ 90%
Storage Humidity ≤ 95%
Operating Temperature -25°C - +50°C
Storage Temperature -40°C - +70°C
Mounting DIN rail (DIN 43880)
Sealing IP51 Indoor
Frequency 50Hz or 60Hz
Power Consumption ≤ 10W
Voltage, Current 0.2% of range maximum
Frequency 0.1% of Mid-Frequency
Power Factor 1% of Unity (0.01)
Current transformer
Frequency 50-60 Hz
Max current 100 A
Transmission Mode RS485 Half-Duplex
Protocol Modbus RTU
Baud Rate 2400bps - 38400bps
Address Range 1-247
Data Bit 8
Stop Bit 1 or 2



wiki/20_rdc_charger/15_hardware/21_pm3.txt · Last modified: 2023/12/13 08:07 by alen.mejak