WG.MT/MD831 (0.5S) Energy Meter

The WG.MT/MD831 energy meter is for industrial customers and electric utilities. It complies with IEC 61036 or IEC 60687 standards for active energy and complise with the IEC 61268 standard for reactive energy and VDEW requirements. The meter can be connected directly via CT or via CT and VT in 3-wire networks (MT851,MD851) and 4-wire networks (MT851). The housing is made of self-extinguishing polycarbonate (IP51). Dimensions comply with the DIN 43857 standard.





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  • Active energy in two directions. Reactive energy in four quadrants
  • Maximum demand. Actual average demand. Cumulative maximum demand
  • Line voltages. Power factors. THD of line voltages (MT851 only)
  • Content of harmonics in line voltages (up to 15th - MT851 only)
  • Registration of energy and demand in up to 8 tariffs
  • 32 channel load profile recorder
  • Log book for different events registration
  • Up to 16 OptoMOS outputs. Up to 10 optically isolated inputs
  • IR optical port, RS232, RS485, CS (20mA) interfaces
  • MeterView software for local and remote reading and programming
  • Load contoller. Callback function on different events
  • Voltage: multi3 x 57,7/100 V … 3 x 240/415 V
  • Current range: 5-10 A, 5-20 A, 5-120 A, 5//1–6 A
  • Accuracy class: 2 or 1 or 0.5S (active energy), 3 or 2 (reactive and apparent energy – calibrated to 1%)
  • Frequency: 50 Hz or 60 Hz
  • External supply: 50-240 V AC/DC
  • Communication interfaces:
    -MT830 (integrated into the meter): CS, RS232, RS485
    -MT831 (integrated into the module): CS, RS232, RS485, PSTN, ISDN, GSM/GPRS, Ethernet