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PQM-701 Operating manual
Fig. 23. Power and energy: Energy tab.
5.2.6 Harmonics
The Harmonics branch can be used to configure the recording method and event detection for
voltage and current harmonics and other parameters directly related to them. The branch has two
tabs: Basic and Additional.
Basic
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This tab is shown in Fig. 41.
In the top part, the user can choose the voltage or current harmonics.
THD (total harmonic distortion) – similarly to other configuration areas, the fields Min, Max,
Avg, Inst. are used to set the recording of minimum, maximum, average and instantaneous
values according to set averaging period. The event detection can be activated on the righthand side. The event will be recorded when THD exceeds the user-defined threshold value.
The event threshold setting range is 0.0…100.0% with 0.1% increment for voltage, and
0.0…200.0% with 0.1% increment for current.
Harmonics – here the user decides to activate the recording of harmonic amplitudes and
about event detection. The event detection thresholds are settable independently for each
harmonic from the 2nd to the 50th order. The setting method is identical as for the harmonics
setting according to EN 50160 (see description in section 5.2.2). There is also an additional
option of selecting the units of harmonics levels: in absolute units (volts or amperes) or in
percent.
The event threshold adjustment range is as follows: