Harmonic Function
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Introduction to harmonic display interface
Harmonic bar chart screen
When “Chart” is selected in the harmonic measurement screen, the bar
chart of harmonic measurement results will be displayed. The bar chart is
used to show the percentage of each harmonic measurement.
Total harmonic parameters: Under single phase mode, display total
harmonic distortion of the single phase. Under three-phase mode, display
total harmonic distortion (THD) factors corresponding to Phase A, B and C.
Single harmonic parameters:
Under single phase mode, display single
harmonic distortion factor and phase of the single phase. Under three-phase
mode,
display the single harmonic distortion factor and corresponding phase.
The phases A, B and C are respectively in yellow, green and red. The user
can rotate the knob to select each harmonic to be displayed. The selected
harmonic will be displayed in blue in the bar chart.
Harmonic list
When “LIST” is selected in the harmonic measurement mode, the list of
harmonic measurement results will be displayed, When “U” is selected, the
list will display the voltage and phase values under various harmonics.
When “I” is selected, the current and phase values will be displayed.
Under
single-phase mode, the list only displays measurement results for Phase A,
and displays 0 for the other two phases, as shown in the figure below; under
three-phase mode, display effective values for the three phases.
Percentage of
harmonic
Parameter of
harmonic
THD value
each harmonic
numbers
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