HT instruments VEGA78 - Manual (Page 33)

VEGA78
EN - 31
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VOLTAGE HARMONICS
h[%] Phase 1
Thd% 6.5
DC 0.0
h1 100.0
h2 0.0
h3 1.8
h4 0.0
HARM I GRAPHIC HARM PAG
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VOLTAGE HARMONICS
h[V] Phase 1
Thd% 6.5
DC 0.0
h1 228.6
h2 0.0
h3 4.2
h4 0.0
HARM I GRAPHIC HARM PAG
Fig. 63: Harmonic analysis voltage in percentage/absolute for Single phase system
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CURRENT HARMONICS
h[%] Phase 1
Thd% 35.5
DC 0.0
h1 100.0
h2 0.0
h3 45.3
h4 0.0
HARM V GRAPHIC HARM PAG
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CURRENT HARMONICS
h[A] Phase 1
Thd% 35.5
DC 0.0
h1 199.7
h2 0.0
h3 90.6
h4 0.0
HARM V GRAPHIC HARM PAG
Fig. 64: Harmonic analysis current in percentage/absolute for Single phase system
Press F3 key to back to graphical screens and F2 key to change voltages’ or currents’
screens. Press F4 key or the up and down arrows (or touch the “HARM PAG” at display)
to show the screens relative to other harmonics orders up to 49
st
.
 Harmonics values of single V1, V2, V3 voltages and neutral voltage Vn and single
currents I1, I2, I3 and neutral current In (for three phase 4-wire system) with THD%
values both with histogram graphics and with numerical values in percentage or
absolute value depending on the desired settings. These values are shown in four
pages selectable by pressing cyclically the F1 key (or touch the “PAGE” at display). On
Fig. 65 end Fig. 66 are display as an example, the situation relative to L1 phase for
voltage and current on 4-wire systems is shown in the next pictures:
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PHASE1 HARM VOLTAGE – Pag 2/5
h 01
Fs 100%
V1h
100.0 %
Thd 6.5 %
PAGE HARM I TABLE HARM PAG
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PHASE1 HARM VOLTAGE – Pag 2/5
h 01
Fs 400.0V
V1h 228.6V
Thd 6.5 %
PAGE HARM I TABLE HARM PAG
Fig. 65: Harmonic analysis voltage V1 in percentage/absolute values for 4-wire system