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NORMA 4000/5000
Operators Manual
8-28
STD Harmonic Mode (EN 61000-4-7 Ed 2.1 compliant)
View Harmonics
1. Use function key Config to open harmonics setup screen. Press Enter and select STD
mode with the cursor keys. Press Enter to confirm.
2. Select number of cycles (N) per analysis interval (200ms @ nominal frequency).
Only settings of 10 (for 50 Hz) and 12 (for 60 Hz) are defined by the EN standard,
the other values (4, 6, 8) are provided for convenience to have a faster update rate
when analyzing lower frequency signals.
Analysis interval length = N / f
sync
[sec]
esn112.eps
3. Select grouping mode according to EN standard:
none No grouping, basic spectral components (absolute RMS only, no THD)
harm Harmonic components Y
H,h
(absolute or relative % of H01), THD
hgrp Harmonic groups Y
g,h
(absolute or relative % of H01), THDG
hsgrp Harmonic subgroups Y
sg,h
(absolute or relative % of H01), THDS
isgrp Inter-harmonic subgroups Y
isg,h
(absolute or relative % of H01), TIDS
sgrp Harmonic & inter-harmonic subgroups Y
sg,h
+ Y
isg,h
(abs. or rel. % of H01),
THDT
Note
THDs are calculated from harmonics or groups 2…40 according to
selected grouping mode, shown only in table view (relative % of H01)
(TIDS and THDT are not defined in EN standard).
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