HT instruments VEGA78 - Manual (Page 88)

VEGA78
EN - 86
This screen (Fig. 146) 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. 146: 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. 124).