YOKOGAWA WT310EH - Page 87

6-5
IM WT310E-01EN
Harmonic Measurement (Option)
1
2
3
4
5
6
7
8
App
Index
Display C
• V:Showsallrmsvoltages(computedvalues)fromthe1sttothe50thharmonic.
• A:Showsallrmscurrents(computedvalues)fromthe1sttothe50thharmonic.
• W:Showsallrmsactivepowers(computedvalues)fromthe1sttothe50thharmonic.
Equation
V=
n
k=1
(Uk)
2
A=
n
k=1
(Ik)
2
W=
n
k=1
P
k
• Uk,Ik,Pk:1sttothe50thharmoniccomponentsofvoltage,current,andactivepower
• k: Measuredharmonicorder
• n:Upperlimitofmeasuredharmonicorder.Thisvaluevariesdependingonthefundamental
frequency of the PLL source.
Display D
• V:Showsallrmsvoltages(computedvalues)fromthe1sttothe50thharmonic.Thesameas
display C.
• A:Showsallrmscurrents(computedvalues)fromthe1sttothe50thharmonic.Thesameas
display C.
• W:Showsallrmsactivepowers(computedvalues)fromthe1sttothe50thharmonic.Thesameas
display C.
• PF:Showsthepowerfactorofthefundamentalwave(1stharmonic).
• VHz:Showsthevoltagefrequency.
• AHz:Showsthecurrentfrequency.
• THDV%:Showsthevoltagedistortion factor. There are two types of equations. For details, see
section6.3.Thedisplayrangeis0.000to99.999and100.00to999.99%.
• THDA%:Showsthecurrentdistortionfactor.Therearetwotypesofequations.Fordetails,see
section6.3.Thedisplayrangeis0.000to99.999and100.00to999.99%.
Note
• IfyoupresstheFUNCTIONkeyofdisplayAtosetthedisplayfunctiontoV,A,orW,displayAshowsthe
samemeasurementitemasV,A,orWondisplayCorD.
• Unlessspecifiedotherwiseinthissection,themaximumdisplay,displayrange,unit,unitprefix,andsoon
are the same as those of normal measurement.
Source Element (WT332E/WT333E only)
Set the input element that you want to display harmonic measurement data of. The element types that
you can select vary depending on the model. Check your model when selecting.
• 1/2/3:Showsthemeasureddataofelement1,2,or3.
Note
IfharmonicmeasurementdatadisplayissettoON,theelementdisplaywillnotmovetoΣevenifyoupress
ELEMENT.
6.2 Displaying Harmonic Measurement Data