Harmonics mode, Waveform measurement function, Voltage fluctuation measurement function – Atec Yokogawa-cw240 User Manual

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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