Atec Yokogawa-cw240 - Manual (Page 4)

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Harmonics mode
Method : PLL synchronization
Measurement frequency range : Fundamental wave frequency 45 to 65
Number of analysis order : 1st - 50th
Window width : 1 period
Window function : Rectangular
Number of data analysis : 128 points
Analysis rate : 1 time / every 16 period
Analysis item : Harmonics level: Each harmonic level of Voltage, Current and Electric power
Relative harmonic content : Each relative harmonic content of Voltage, Current and Electric power
Harmonic phase angle: Each harmonic phase angle of Voltage, Current and Electric energy
Select fundamental wave for Voltage and Current or select fundamental wave against U1
Total value : Total value up to 50th harmonic of Voltage, Current, Electric energy and Power factor
Total harmonic content : Voltage and Current (THD-F or THD-R)
Accuracy : Harmonics level
Current / Electric Power 1 to 20th : ±1.5%rdg.±1.5%rng.
16th or later order for 96031 21 to 30th : ±2.0%rdg.±1.5%rng.
All order for 96032
31 to 50th : ±3.0%rdg.±1.5%rng.
Reference value : Relative harmonic content
+/- 2 dgt by computing from the harmonic level
: Harmonic phase angle
Accuracy assurance range is more than 5% of the range for both harmonic voltage of each
order and current level
1to 20th order：±5°
20 to 50th order: +/-20 （0.3°×k+1°） k： order
Display data : List, Bar graph (linear or log) and Vector
Waveform measurement function
Measurement elements : Voltage/Current waveform at inphase, All voltage waveform, Select from all current waveform
Change of magnification : 1/3 to 20 times against the rating
Display data : 1 waveform
Voltage fluctuation measurement function
Measurement elements : Voltage Dip/Voltage Swell/Voltage failure
Measurement method : Detect from voltage RMS value of 1 waveform
Threshold value/ Hysteresis : Set % against to reference voltage
Accuracy : Same as voltage RMS accuracy
Detection period : Period that exceeded threshold value
Display data
: Data, Time, Voltage RMS value and detection period
number of event : 100