13.2 Input Specifications/Output Specifications/Measurement Specifications
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Chapter 13 Specifications
(31) Total harmonic voltage and Total harmonic current distortion factor (Uthd, Ithd)
Measurement method IEC61000-4-7:2009 compliant.
Max. order: 50th
The string "-----" will appear for the voltage distortion factor when the RMS voltage is zero; for the
current distortion factor when the RMS current is zero.
Analysis window width 10 cycles (50 Hz), 12 cycles (60 Hz), or 80 cycles (400 Hz)
Number of window points Rectangular, 4096 points
Displayed item THD-F (total harmonic distortion factor for the fundamental wave)
THD-R (total harmonic distortion factor for the total harmonic including the fundamental wave)
Measurement range 0.00% to 100.00% (Voltage), 0.00% to 500.00% (Current)
Measurement accuracy 0.5%
Defined for the following input with a nominal input voltage of 100 V to 440 V:
Voltage, 1st order: 100% of the nominal input voltage; 5th and 7th orders: 1% of the nominal input
voltage
Current, 1st order: 100% of current range; 5th and 7th orders: 1% of current range
Event threshold 0.00% to 100.00%
Event IN Start of approx. 200 ms aggregation in which the absolute value was greater than the threshold
Event OUT Start of approx. 200 ms aggregation in which the reading was less than (threshold - hysteresis)
following the EVENT IN state
Multiple-phase system treatment Separate by channel
Saved waveforms Event waveforms
(32) K Factor (multiplication factor) (KF)
Measurement method Calculated using the harmonic RMS current of the 2nd to 50th orders.
(For details, see "13.8 Calculation Formula" (p.231)
.)
Analysis window width 10 cycles (50 Hz), 12 cycles (60 Hz), or 80 cycles (400 Hz)
Number of window points Rectangular, 4096 points
Displayed item K factor
Measurement range 0.00 to 500.00
Measurement accuracy -
Event threshold 0 to 500.0
Event IN Start of approx. 200 ms aggregation in which the absolute value was greater than the threshold
Event OUT Start of approx. 200 ms aggregation in which the reading was less than (threshold - hysteresis)
following the EVENT IN state
Multiple-phase system treatment Separate by channel
Saved waveforms Event waveforms
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