AEM 3945-B Manual

A SERVICE OF

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42

Power Quality Analyzer Model 3945-B

5.2 Harmonics Mode

Press the harmonic display mode button -

Usethefunctionbuttonstoselectthetypeofharmonicanalysis:

V - Single phase voltage analysis

A - Current analysis

VA -Poweranddirectionowanalysis

U - Phase-to-phase voltage analysis

The

and buttons allow the user to zoom in or

out, in increments of 2%, 5%, 10%, 20%, 50% and 100%.

5.2.1 Single Phase and Phase-to-Phase Voltage Analysis

07/25/0259.95Hz 10:26 100

%

.+

3L

L1

L2

L3

3

1

2

31.5

%

Vh 03 1.3

%

0.6

%

31.4

v

2.7

v

1.2

v

+003° +113° -094°

1 2 3

V A VA U

50

%

25

1 3 5 7 9 11 13 15 17 19 21 2 3 25

Figure 5-8

 Valuesmeasuredforeachphase,atcursorposition(intheexampleshown

above, the 3

rd

harmonicisselectedanddisplayed)

 Theinformationdisplayedis:

- Harmonic order

- Percentage relative to the fundamental

- RMS value

- Phase angle in relation to the fundamental, according to the measure-

menttypechosen(inthisexampleV)withthevariablefunctionbuttons

just below the screen.