YOKOGAWA WT3002E - Page 139

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IM WT3001E-51EN
• Zooming in on the Vector
3.
Press the U Mag/I Mag soft key to set the cursor key target to U Mag, I Mag, or
both U Mag and I Mag.
• If U Mag is selected, you can zoom in on the vector of the fundamental wave U(1) of
each element that is specified for harmonic measurement.
• If I Mag is selected, you can zoom in on the vector of the fundamental wave I(1) of each
element that is specified for harmonic measurement.
• If both U Mag and I Mag is selected, you can zoom in on the vector of the fundamental
waves U(1) and I(1) of each element that are specified for harmonic measurement
without changing the difference in the zoom factor between U Mag and I Mag. The value
of the digit being specified by U Mag changes.
4.
Press the cursor keys to set the zoom factor.
Explanation
The phase and size (rms value) relationship between the fundamental waves U(1) and I(1)
ofeachelementinthewiringunitofΣAorΣBcanbedisplayedusingvectors.Thepositive
vertical axis is set to 0 (angle zero), and the vector of each input signal is displayed.
Note
If the analysis window width (frequency of the fundamental signal) that is determined by
the fundamental frequency is shorter in time than the data update interval, the vector is not
displayed. If this happens, decrease the data update interval. The details are the same as with
harmonic data. See the note in section 7.3.
• Turning ON/OFF the Numeric Data Display
Select whether to display the numeric data (ON/OFF). The size and the phase difference
between the signals can be displayed along with the vector display. For the display format
of the phase difference, see section 5.10 in the User’s Manual IM WT3001E-01EN.
• Setting the Zoom Factor of Vectors
The size of the vectors can be changed.
• The zoom factor can be set in the range of 0.100 to 100.000.
• You can specify separate zoom factors for the fundamental waves U(1) and I(1).
Note
If all the wiring systems are single-phase two-wire (1P2W) or if you are using the single input
elementmodel,Σwiringunitsdonotexist.Therefore,nothingisdisplayedonthevectordisplay.
• Limitations on the Vector Display by Measurement Modes
Vectors cannot be displayed in the following measurement modes.
• IEC harmonic measurement mode
• Waveform computation mode
• FFT mode
• Voltage fluctuation and flicker measurement mode
• Cycle-by-cycle measurement mode
7.10 Displaying Vectors