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Product at a glance

Prometer 540 is a series of next-generation energy meters designed for bulk power transfer points requiring accurate and precise measurements, revenue protection and cyber security compliance. Flexible and highly modular communication interfaces ensure integration with AMR / AMI and the latest generation substation automation systems. Four quadrant of energy measurement allow for various types of revenue metering applications in electricity networks. Additionally, power quality measurements and reporting provide enhanced value to the utility.


  • Bulk energy transfer and reconciliation. Examples: Power generation plants, conventional or renewable and transmission networks
  • Online monitoring of bulk exchange points in the power network
  • Integration into substation automation and SCADA / EMS systems to provide accurate electrical measurements
  • Retrofit existing main and check statistical meters for grid code compliance


  • Highest precision measurement for accurate billing and settlement at bulk energy transfer points
  • Measurements for supply quality assessment
  • Easy integration through multiple communication protocol interface
  • Suitable for diverse applications through wide-range voltage, current and auxiliary supply inputs
  • Easy to use and highly configurable communication modules
  • Support of industry-standard DLMS, MODBUS and IEC 61850 reading protocols
  • Field replaceable hot-pluggable communication modules
  • Multilingual support on display (English, Swedish, German, French, Spanish, Italian, Russian, Arabic, Vietnamese and Indonesian)


  • 0.1 S accuracy for energy measurement as per IEC 62053-22 standard (edition 2.0)
  • Wide-range dual auxiliary supply with options for AC / DC and self-power (VT powered)
  • Large memory capacity for data storage
  • Modular communication option with in-built 4G / RS-232 / RS-485 and Ethernet. All these ports are capable of simultaneous communication
  • Multi communication protocols DLMS, MODBUS and IEC 61850 (editions 1 and 2)
  • High-level DLMS security (data encryption and authentication)
  • Harmonic measurement for voltage and current up to 50th order
  • Powered RS-232 / RS-485 port for third-party modem integration
  • Touch sense keypad
  • Advance power quality features, including THD, sag, swell, voltage unbalance and interruption recording
  • Dynamic error compensation for CT / VT
  • Transformer / line loss adjustment (copper and iron losses)
  • Intuitive graphical display including vector diagram, waveforms and bar chart for consumption
  • Support of meter display over field-replaceable battery
  • User configurable meter constant
  • Dual loggers for energy and instantaneous parameters
  • Flexible time-of-day tariff, maximum demand support, DST (daylight saving time) support with automatic billing dates
  • Anomaly system events include critical meter cover and terminal cover open detection