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How and where to measure correctly?


Electricity meter lexicon - Lesson 1: Overview of meter types for energy management.

Here we would like to share our experience with a wide variety of metering systems. In this first lesson, we provide an overview and help with the selection of meter types in industrial plants.

Background: Energy meters are used to collect electrical quantities. Mostly, it is a question of recording the work performed or the (active) power drawn or "consumed". In individual cases, the measurement of other values can be important, e.g. to check the power quality. For example, some models measure the mains voltage, while more powerful meters also measure harmonics, total harmonic distortion, flicker and others. In practice, a distinction must be made between readable and non-readable meters, and between meter readings and instantaneous values.


Power Quality Meters / Power Quality Analyzers

Netzqualität-Messgeräte / Power Quality Analyzer (>800€)
  • Installation location: transformer underside in the NSHVT or for special consumers.
  • Data: Meter readings, powers, voltages, harmonics, THD, flicker, etc.
  • Communication interface: Modbus TCP
  • Examples: Siemens Sentron PAC 4200; Janitza UMG 508/512; Janitza UMG 96RM-E.

 

Our tip: Rarely necessary!

Normal multifunction meters

Normale Multifunktionsmessgeräte (250-500€)
  • Installation location: transformer bottom side in the NSHVT, outlets of equipment in the NSHVT.
  • Data: Meter readings, powers, voltages, sometimes harmonics, THD.
  • Communication interface: Modbus TCP
  • Examples: Siemens Sentron PAC 3200, Janitza UMG 96RM-EL, KBR multimess, Celsa TNM 96, Somec Diris A40; Econ Sense.

 

Our tip: These meter types are our recommendation!