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Input Specications/Output Specications/Measurement Specications
32. Harmonic voltage and current phase difference measurement specications Pphase
Measurement method Uses IEC61000-4-7 Ed2.1: 2009
Analysis window width 10 cycles/12 cycles
Window point count Rectangular 2,048 points
Displayed items Indicates the difference between the harmonic voltage phase angle and the harmonic
current phase angle (including fundamental wave component).
Phase difference between the harmonic voltage and the harmonic current on each
channel
Sum of values on multiple channels (For details, see Calculation Formula.)
Measurement range 0.00° to ±180.00°
Measurement accuracy 1st order to 3rd order: ± 2°
4th order to 50th order: ± (0.05° × k + 2°) (k: Harmonic Orders)
However, current sensor accuracy is added. Harmonic Voltage of every order is
specied as 1% of the declared voltage, and current level is specied as 1% f.s. or
more.
33. Voltage THD and current THD measurement specications Uthd, Ithd
Measurement method Uses IEC61000-4-7 Ed2.1: 2009
Analysis window width 10 cycles/12 cycles
Window point count Rectangular 2,048 points
Displayed items THD-F (total harmonic distortion factor for the fundamental wave)
THD-R (total harmonic distortion factor for the total harmonics including the
fundamental wave)
Display selection THD-F/THD-R (storage is implemented for both)
Measurement range Voltage: 0.00% to 100.00%
Current: 0.00% to 500.00%
Event threshold Voltage: 0.0% to 100.0%
Current: 0.0% to 500.0%
Event IN Starting time of an approximately 200-ms aggregation period to which a value belongs
when it exceeds the threshold value
Event OUT Starting time of an approximately 200-ms aggregation period to which a value belongs
when it falls below the value calculated by subtracting the hysteresis from the threshold
value during the Event In state
Multiple-phase system
treatment
Separate by channel
Saved waveforms Event waveforms
34. Voltage unbalance factor (negative-phase unbalance factor, zero-phase unbalance factor)
measurement specications Uunb, Uunb0
Measurement method Calculated using the fundamental voltage component of each 3-phase in the 3-phase
3-wire (3P3W2M, 3P3W3M) and 3-phase 4-wire wiring (For details, see Calculation
Formula.).
Displayed items Negative-phase unbalance factor (Uunb)
Zero-phase unbalance factor (Uunb0)
Measurement range Component: V
Unbalance factor: 0.00% to 100.00%