Harmonic Analysis Page - LOVATO ELECTRIC DCRG8 Manual Operativo

PAGES EXAMPLE
Harmonics
Waveforms
1 - Key ► switches between
Energy meters
Total/Partial indications
Event log 1 - Event description
2 - Event time stamp
3 - Event number / total
Expansion status
Real time clock
System 1 - Software
information Hardware
Parameters revision level
2 - Plant / board name
3 - Internal board temperature
Note: Some of the pages listed above may not be displayed if the relevant function is disabled. For example, if the limit function is not programmed, the
corresponding page will not be shown.

HARMONIC ANALYSIS PAGE

– In the DCRG8, it is possible to enable the calculation of the FFT harmonic analysis up to the 31st order of the following measurements:
• Phase-to-phase voltages
• Phase-to-neutral voltages
• Currents.
– For each of these measurements, there is a display page that graphically represents the harmonic content (spectrum) with a bar graph.
– Every column is related to one harmonic order, even and odd. The first column shows the total harmonic distortion (THD).
– Every histogram bar is then divided into three parts, one for each phase L1, L2, L3.
– The value of the harmonic content is expressed as a percentage with respect to the fundamental (system frequency).
– It is possible to show the harmonic content in numeric format, selecting the required order using ◄ and ►. The lower part of the screen will display a small
arrow that points to the selected column and the relative percentage value of the three phases.
– The vertical scale of the graph is automatically selected among four full-scale values, depending on the column with the highest value.
1 - Numeric values of the
selected order
G
B
5