HT instruments VEGA78 - Manual (Page 30)

VEGA78
EN - 28
5.2.6. HARM analysis screens
Starting from any page of numerical values it’s possible to enter harmonics numerical
values and histogram graphics screens section for voltage and current input signals by
pressing F2 key (or touch HARM at display). By pressing cyclically F1 key the below
screens are shown by meter:
 Harmonics values of V1, V2, V3 voltages and neutral voltage Vn (for three phase 4-
wire system), 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, (see § 0 as below shown:
12/09/2006 – 16:55:10
TOTAL HARM VOLTAGE – Page 1/5
h 01
Fs 100%
V1h
100.0 %
V2h 100.0 %
V3h 100.0 %
Vnh 0.0 %
Thd 6.5 %
Thd 5.9 %
Thd 4.3 %
Thd 0.0 %
PAGE HARM I TABLE HARM PAG
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TOTAL HARM VOLTAGE – Page 1/5
h 01
Fs 400.0V
V1h
228.6V
V2h 225.1V
V3h 230.7V
Vnh 0.0V
Thd 6.5 %
Thd 5.9 %
Thd 4.3 %
Thd 0.0 %
PAGE HARM I TABLE HARM PAG
Fig. 53: Harmonic analysis of voltages in percentage/absolute values for 4-wire systems
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TOTAL HARM VOLTAGE – Page 1/4
h 01
Fs 100%
V12h
100.0 %
V23h 100.0 %
V31h 100.0 %
Thd 6.5 %
Thd 5.9 %
Thd 6.5 %
PAGE HARM I TABLE HARM PAG
12/09/2006 – 16:55:10
TOTAL HARM VOLTAGE – Page 1/4
h 01
Fs 400.0V
V12h
328.4V
V23h 389.6V
V31h 386.6V
Thd 6.5 %
Thd 5.9 %
Thd 4.3 %
PAGE HARM I TABLE HARM PAG
Fig. 54: Harmonic analysis of voltages in percentage/absolute values for 3-wire and ARON
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PHASE1 HARM VOLTAGE – Pag 1/2
h 01
Fs 100%
V1h
100.0 %
Thd 6.5 %
PAGE HARM I TABLE HARM PAG
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PHASE1 HARM VOLTAGE – Pag 1/2
h 01
Fs 400.0V
V1h
228.6V
Thd 6.5 %
PAGE HARM I TABLE HARM PAG
Fig. 55: Harmonic analysis of voltages in percentage/absolute values for Single phase
In all case the full scale of graphs is automatically set from meter depending on measured
values.