Reference Manual
Power Analyzer EMM5
Rev. 11
2018-07
4
1
Overview
The EMM5 power analyzer has been designed to provide a great variety of information from the power distribution
system it supervises. It contains a powerful measurement system which is able to provide high-precision values from 3-
phase systems.
A big liquid crystal display with backlight provides a good visibility even in poor light conditions.
Four adaptive soft-keys provide easy and intuitive usage also in complex situations.
A basic set of standard values (currents, voltages and powers) is calculated from the measured input data. These are
then used to calculate further values such as power factors and others. A full list can be found in the “Measurement
system” chapter. Nearly all calculated values are true RMS (TRMS) values, which means that they are correct even if the
waveform is not a sine function.
A full range “Fast Fourier Transformation” is performed on the input data from all channels (3 voltage channels, 4
current channels). This provides information about the harmonic contents which distort the sine waveforms of currents
and voltages.
The following options are available for EMM5:
Relay outputs: For external alarm signal can be used each relay by one or more alarm.
Impulse outputs: These allow to trigger external counters for active and reactive energy.
Modbus RTU Interface: This enables an easy connection to a bus system.
Data Logger: This option offers in addition to the Data Logger function a Modbus RTU Interface and a digital input. The
additional functions, such as for example, the additional counters and the event recorder are described in more details
in the appropriate menu.
Important information!
If the sign aside appears besides a text passage in the manual the reader is strongly advised to read the
corresponding information as it may be very important for usage of the EMM5.
It can contain safety advice or other information for the correct handling of the device. If the information
is disregarded, the device may be inoperable or even damaged!
!
