YOKOGAWA WT310EH - Page 66

4-12
IM WT310E-01EN
A×B:TheproductofthevaluesofdisplayAanddisplayBisdisplayed.
 ThisfeatureisusefulwhenyouaredisplayingafunctionotherthanVA(apparentpowerS)in
display A and you want to display apparent power S in display C.
Computation example:
Any
Display A Display B Display C Wiring System
U1rms I1rms U1rms × I1rms
A÷B:TheresultofdividingthevalueofdisplayAbythevalueofdisplayBisdisplayed.
When computing the absolute impedance value
Computation example 1:
Any
Display A Display B Display C Wiring System
U1rms I1rms
| Z | =
U1rms
I1rms
U1
I1
Power supply
Load
When computing the line voltage ratio and line current ratio for three-phase wiring
Computation example 2:
I1rms I3rms
I1rms
I3rms
3P3W
Display A Display B Display C Wiring System
U1rms U3rms
U1rms
U3rms
U1
Power supply
Load
U3
I1
I3
A÷B
2
:TheresultofdividingthevalueofdisplayAbythesquareofthevalueofdisplayBis
displayed.
 Whencomputingimpedance(Z),resistance(R),orreactance(X)
Computation example:
U1
I1
Power supply
Load
Q1 (var) I1rms
| X | =
Q1
(I1rms)
2
P1 (W) I1rms
R =
P1
(I1rms)
2
Any
Display A Display B Display C Wiring System
S1 (VA) I1rms
| Z | =
S1
(I1rms)
2
4.5 Displaying the Efficiency (WT332E/WT333E only), Crest Factors, the Results of Computations Using
Basic Arithmetic, and Average Active Powers