FLIR CM85 - Page 56

FLIRCM82USERMANUALDocumentIdentifier:CM82‐en‐US_AD
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5.8.2.2Three‐PhaseFour‐WireBalanced/Unbalanced
Thepowerofathree‐phasefour‐wireconfigurationismeasuredinthreesteps,accordance
withFigure5.5.Thetotalpoweristhesumofthethreemeasurements:W=W
1
+W
2
+W
3


Figure5.5Three‐phasefour‐wiremeasurements

1. SetthefunctionswitchtotheWposition.
2.
Ensurethatthemeterissettoactivepowermeasurement.Ifthe orthe 
indicatorisdisplayed,presstheMODEbuttonrepeatedlyuntilnoneofthese
indicatorsaredisplayed.

3.
Takethreemeasurementsoftheactivepower,inaccordancewithFigure5.5.
4.
Tomeasureanddisplaythepowerfactor,presstheMODEbuttonrepeatedlyuntilthe
indicatorisdisplayed.
5.
Readthepowerfactorvalueonthedisplay.
 Ifthevalueisdisplayedwithoutasign,thephaseofthecurrentsignalislagging
behindthevoltagesignal(inductiveload).
 Ifthevalueisdisplayedwithaminussign(–),thephaseofthecurrentsignalis
leadingthevoltagesignal(capacitiveload).
6. Toreturntoactivepowermeasurements,presstheMODEbuttonrepeatedlyuntil
neitherthe
northe indicatorisdisplayed.