YOKOGAWA WT200 User Manual page 80

Explanation
IM 253421-01E
7.4 Setting the Harmonic Order and Displaying the Results of Harmonic Analysis
Setting the Order of Harmonics
The maximum order for which analysis results can be displayed varies depending on
the frequency of the fundamental.
Example
• When the fundamental frequency is 50 Hz, up to 50 orders can be displayed;
• When the fundamental frequency is 400 Hz, up to 30 orders can be displayed.
When an order is set exceeding the maximum order, display B will change to the dot
display. For details related to the upper limit of the order of analysis, see chapter 16,
"Specifications."
Displaying the Results of Harmonic Analysis
Depending on the setting of display function of display B and C, the analyzed items
will appear on the display as follows. In the following explanation a maximum of 50
analysis orders is assumed. In case of a maximum less than 50, computation/display
will be performed up to that order.
Display B
• V: Shows the analysis value of the voltage corresponding to the order shown
on display A;
• A: Shows the analysis value of the current corresponding to the order shown
on display A;
• W: Shows the analysis value of the active power corresponding to the order
shown on display A;
• PF: Shows the power factor of the fundamental (1st order);
• V%: Shows the harmonic distortion of the voltage followed by the character "t";
Two computation methods are available; See section 7.2 for details. The
display range is 0.00 to 99.99 and 100.0 to 999.9%.
• A%: Shows the harmonic distortion of the current followed by the character "t";
Two computation methods are available; See section 7.2 for details. The
display range is 0.00 to 99.99 and 100.0 to 999.9%.
• V%: Shows the relative harmonic content of the voltage corresponding to the
order shown on display A; The display range is 0.00 to 99.99 and 100.0 to
999.9%.
• A%: Shows the relative harmonic content of the current corresponding to the
order shown on display A; The display range is 0.00 to 99.99 and 100.0 to
999.9%.
• W%: Shows the relative harmonic content of the active power corresponding to
the order shown on display A; The display range is 0.00 to ±99.99 and
±100.0 to ±999.9%.
• V deg: When the fundamental (1st order) is shown on display A
Shows the phase angle between the 1st order of the current and the 1st
order of the voltage. G (phase lag) or d (phase lead) will also be displayed.
When the 2nd to 50th order is shown on display A
Shows the phase angle between the 1st order of the voltage and the 2nd to
50th order of each voltage. A – (minus) will be displayed in front of the order
only when the 2nd to 50th order is phase-lagged. The display range is
–180.0 to 180.0 deg.
• A deg: When the fundamental (1st order) is shown on display A
Shows the same as in case of V deg.
When the 2nd to 50th order is shown on display A
Shows the phase angle between the 1st order of the current and the 2nd to
50th order of each current. A – (minus) will be displayed in front of the order
only when the 2nd to 50th order is phase-lagged. The display range is
–180.0 to 180.0 deg.
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