Energy meter, EM series

Areas of application

Electronic energy meters are mainly used for collecting data on effective and reactive consumption. Their standard area of application is in the field of energy management for cost centre analysis. There are various communication possibilities available in order to avoid time-consuming manual readings at site. 

The effective pulses can be connected via two impulse outputs e.g. DDC, PLC, SCADA systems or the data logger ProData®. In the area of central building control systems the protocols M-Bus, EIB-KNX and Modbus RTU are available through additional communication modules which read the actual meters using an optical interface and which provide the respective value on the field bus through the interface. 

The selection of additional values such as voltage, current, power, power factor and frequency together with effective and reactive energy are available on the bus cable through the communication modules. For consumption data collection, the EM meters can also be used as instruments for sub-metering for the UMG604 through Modbus RTU.

Main features

  • Communication modules: Modbus, M-Bus, EIB-KNX
  • Direct measurement up to 125A or through current transformer
  • 2 tariffs
  • With and without MID calibration
  • Sealed clamp covers
  • Four quadrants measurement
  • Measurement values: effective energy, reactive energy, effective power, reactive power
  • Class 1

Data collection and recording

All meters store the counter values in non-volatile memories. The meter reading cannot be reset in the calibrated version but in the noncalibrated version the readings can be reset. The current transformer ratio is fixed (5:5) for calibrated meters.

 

 

Applications

The electronic energy meters of the EM series are suitable for the measurement of effective- and reactive-energy consumption. Measurement is laid out for a 1- and 3- phase system with a voltage of L-N 184-276VAC. The current inputs are designed for direct connection or for measurement through current transformers. Installation is undertaken on DIN-rails, whereby the extremely compact construction is of particular value. 

There are two versions available: a non-calibrated version and a calibrated version (MID). All meters in the EM series can be sealed. The effective and reactive energy is available in two tariffs and in four quadrants. The accuracy of the meters is class 1 for effective energy and class 2 for reactive energy.