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PQA400 - PQA823 - PQA824

EN - 31

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,

not available for PQA400) 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%

100.0%

0.0%

Thd

6.5%

Thd

5.9%

Thd

4.3%

Thd

0.0%

PAGE HARM I TABLE HARM PAG

12/09/2006 – 16:55:10

TOTAL HARM VOLTAGE – Page 1/5

h 01

Fs 400.0V

228.6V

225.1V

230.7V

0.0V

Thd

6.5%

Thd

5.9%

Thd

4.3%

Thd

0.0%

PAGE HARM I TABLE HARM PAG

Fig. 57: Harmonic analysis of voltages in percentage/absolute values for 4-wire systems

12/09/2006 – 16:55:10

TOTAL HARM VOLTAGE – Page 1/4

h 01

Fs 100%

12h

100.0%

23h

100.0%

31h

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

12h

328.4V

23h

389.6V

31h

386.6V

Thd

6.5%

Thd

5.9%

Thd

4.3%

PAGE HARM I TABLE HARM PAG

Fig. 58: Harmonic analysis of voltages in percentage/absolute values for 3-wire and ARON

12/09/2006 – 16:55:10

PHASE1 HARM VOLTAGE – Pag 1/2

h 01

Fs 100%

100.0%

Thd

6.5%

PAGE HARM I TABLE HARM PAG

12/09/2006 – 16:55:10

PHASE1 HARM VOLTAGE – Pag 1/2

h 01

Fs 400.0V

228.6V

Thd

6.5%

PAGE HARM I TABLE HARM PAG

Fig. 59: 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.

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