HT instruments PQA824 - Manual (Page 101)

PQA400 - PQA823 - PQA824
EN - 100
This screen (Fig. 165) displays the harmonic values and the THD% value of neutral
voltage Vn and neutral current In in a graph (scaled according to the Full scale Fs) or in a
table. The values displayed are percentage values of the fundamental or absolute values
according to the configuration set in the ANALYZER CONFIGURATION MENU ->
ADVANCED.
Fig. 165: Neutral harmonics in three-phase 4-wire system
The following keys are active on this page:
 The up (ZOOM+) or down (ZOOM-) arrow keys zoom in or out the histogram.
 The right and left arrow keys move the cursor to the right or to the left along the
harmonics.
 The
F1 key (or the PAG item on the display) advances to the following page of
saved values relative to total harmonics.
 The
F2 key (or the ARM V or ARM I item on the dislay) switches between voltage
and current harmonics relative to Phase 3.
 The F4 key (or the ARM PAG item on the display) displays the following
harmonics group. 0..9, 10..19, 20..29, 30..39, 40..49.
 The
ESC key (or the smart icon on the display) to exit the function and go back
to the “Recording analysis” page (Fig. 143).