Siemens SICAM Q100 7KG95 Series Manual page 268

9 Operation at Use of a PC
9.4 Value View and Evaluation
Displaying Voltage and Current Harmonics
Current and voltage harmonics can be displayed as a Table or as a Diagram. Select the desired display form
in the Measurement output list box. Click Display to confirm the selection.
Table
(see Figure 9-86)
The parameters given in the Measured value/Unit columns mean the following:
• THDS voltage [%]: Subgroup total harmonic distortion: ratio of the r.m.s. value of the harmonic subgroups
to the r.m.s. value of the subgroup associated with the fundamental
• THDR [%]: Total harmonic distortion related to the total RMS value in %
• THD-2650 [%]: Total upper band Harmonics Distortion (26th to 50th) related to the fundamental in %
• K-factor [-]: K-factor is a weighting of the harmonic load currents according to their effects on transformer
heating.
• Harmonics Magnitude [%]: Harmonic magnitudes in %
• Harmonics Angle [°]: Harmonic phase angle in °
• Harmonics PreAngle [°]: Prevailing phase angle in °
• Harmonics PR [-]: Prevailing ratio
Diagram
The voltage- or current-harmonics diagram only shows the RMS values of the harmonic.
Figure 9-87
Display of Harmonics and Interpretation for Harmonic Direction
268
Example for a Voltage-Harmonic Diagram
SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A6, Edition 06.2019