MI 2893 / MI 2892 / MI 2885
Harmonics / inter-harmonics
55
METER
Switches to METER view.
TREND
Switches to TREND view.
EFF
Switches to EFFICIENCY view.
Returns to the “MEASUREMENTS” submenu.
3.8
Harmonics / inter-harmonics
Harmonics presents voltage and current signals as a sum of sinusoids of power frequency and its integer
multiples. Sinusoidal wave with frequency k-times higher than fundamental (k is an integer) is called
harmonic wave and is denoted with amplitude and a phase shift (phase angle) to a fundamental
frequency signal. If a signal decomposition with Fourier transformation results with presence of a
frequency that is not integer multiple of fundamental, this frequency is called inter-harmonic frequency
and component with such frequency is called inter-harmonic. See 5.1.8 for details.
3.8.1
Meter
By entering HARMONICS option from Measurement’s submenu, the tabular HARMONICS (METER)
screen is shown (see figure below). In this screens’ voltage and current harmonics or inter-harmonics
and THD are shown.
Figure 39: Harmonics and inter-harmonics (METER) screens
For phase harmonics presentation, there are also Power harmonics presented, for each phase separately:
Figure 40: Phase harmonics presentation (U,I,P)
Description of symbols and abbreviations used in METER screens are shown in table below.
Table 23: Instrument screen symbols and abbreviations
F4
